共沉淀反应时间对LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2正极材料形貌和电化学性能的影响
作者：
夏凌峰;李灵均;杨慧平;赵子祥
期刊：
矿冶工程 ,2020年40(2):123-126 ISSN：0253-6099
作者机构：
长沙理工大学 材料科学与工程学院,湖南 长沙410000;[夏凌峰; 赵子祥; 杨慧平; 李灵均] 长沙理工大学
关键词：
锂离子电池;正极材料;三元正极材料;前驱体;共沉淀法;电化学性能
摘要：
采用共沉淀法制备Ni_(0.5)Co_(0.2)Mn_(0.3)(OH)_2前驱体,并通过高温固相法合成LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2正极材料,研究了反应时间对Ni_(0.5)Co_(0.2)Mn_(0.3)(OH)_2前驱体和LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2正极材料的形貌、结构以及电化学性能的影响。结果表明,随着反应时间增加,前驱体和正极材料的二次颗粒粒径逐渐增大;若反应时间过短,二次颗粒粒径小,易加剧电化学循环过程中材料与电解液的副反应,正极材料循环性能较差;若反应时间过长,二次颗粒粒径过大,增加了锂离子扩散路径,也不利于正极材料在高倍率下的循环。反应16 h制备的LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2正极材料具有适中的颗粒粒径,拥有优异的电化学性能,在1C倍率经过180圈循环容量保持率可达75.3%,5C倍率经过300圈循环容量保持率可达56.0%。
语种：
中文
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In-situ tailored 3D Li2O@Cu nanowires array enabling stable lithium metal anode with ultra-high coulombic efficiency
作者：
Tan, Lei;Li, Xinhai;Cheng, Meng;Liu, Tiancheng;Wang, Zhixing;...
期刊：
Journal of Power Sources ,2020年463:228178 ISSN：0378-7753
通讯作者：
Wang, Jiexi
作者机构：
[Liu, Tiancheng; Guo, Huajun; Wang, Zhixing; Yan, Guochun; Tan, Lei; Li, Xinhai; Liu, Yong; Cheng, Meng; Wang, Jiexi] Cent South Univ, Sch Met & Environm, State Key Lab Powder Met, Changsha 410083, Peoples R China.;[Guo, Huajun; Wang, Zhixing; Yan, Guochun; Li, Xinhai; Wang, Jiexi] Cent South Univ, Engn Res Ctr, Minist Educ Adv Battery Mat, Changsha 410083, Peoples R China.;[Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Wang, Jiexi] C;Cent South Univ, Sch Met & Environm, State Key Lab Powder Met, Changsha 410083, Peoples R China.
关键词：
Anodes;Charge transfer;Charging (batteries);Copper;Copper oxides;Efficiency;Expansion;Foams;Musculoskeletal system;Nanowires;Secondary batteries;Composite nanowires;Coulombic efficiency;Electrochemical lithiation;Hierarchical structures;Lithium metal anode;Spontaneous reactions;Ultra-low-voltage;Volume expansion;Lithium
摘要：
Suffering from uncontrollable dendrite growth and volume expansion, Li metal batteries have the drawbacks of low coulombic efficiency and short cycle life, which severely limits its practical application. Herein, a multifunctional 3D skeleton of Li2O@Cu composite nanowires array on Cu foam (Li2O@CuNA/CF), in which the Li2O is homogenously distributed onto the Cu nanowires array through the in-situ spontaneous reaction between CuO nanowire and Li metal or electrochemical lithiation of CuO, is designed and serves as lithium storage host for Li metal anode. The lithiophilic Li2O@CuNA provides enough Li nucleation sites for regulating the distribution of Li ions and homogenizing the repeated plating/stripping of Li. The Li2O@CuNA/CF hierarchical structure ensures the rapid charge transfer and inhibits of Li volume expansion. As a result, Li is well accommodated in the Li2O@CuNA/CF skeleton and no distinct Li dendrite is observed. More importantly, the coulombic efficiency is up to 98.5% after 300 cycles in half-cell. The corresponding Li2O@CuNA/CF/Li symmetric cell exhibits superior stable voltage profile with ultra-low voltage hysteresis (15 mV) for 600 h. This work provides a guide for building a 3D Li2O-metal lithiophilic framework for safe and stable Li anode in Li metal batteries. © 2020 Elsevier B.V.
语种：
英文
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Introduction of an interface layer on hydroxyapatite whisker/poly(L-lactide) composite and its contribution for improved bioactivity and mechanical properties
作者：
Yi, Wen-Jun;Qiu, Zi-Shi;He, Hao;Liu, Bo;Wang, Mingyu;...
期刊：
Nanotechnology ,2020年31(23):235703 ISSN：0957-4484
通讯作者：
Chao, Zi-Sheng;Li, Li-Jun;Shen, Yi
作者机构：
[He, Hao; Wang, Mingyu; Liu, Bo; Chao, Zi-Sheng; Yi, Wen-Jun; Qiu, Zi-Shi; Jiang, Min] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Li, Li-Jun] Hunan Inst Sci & Technol, Coll Chem & Chem Engn, Yueyang 414006, Peoples R China.;[Shen, Yan-Yu; Shen, Yi] Cent South Univ, Xiangya Hosp 2, Dept Orthopaed Dept, Changsha 410011, Hunan, Peoples R China.
通讯机构：
[Chao, Zi-Sheng; Shen, Yi] C;[Li, Li-Jun] H;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;Hunan Inst Sci & Technol, Coll Chem & Chem Engn, Yueyang 414006, Peoples R China.;Cent South Univ, Xiangya Hosp 2, Dept Orthopaed Dept, Changsha 410011, Hunan, Peoples R China.
关键词：
Adhesion;Amines;Biocompatibility;Calcium compounds;Cell culture;Composite materials;Cyclodextrins;Ethylene;Flowcharting;Hydroxyapatite;Particle size;Stem cells;Surface roughness;Tensile strength;Dissolution precipitations;Hydroxyapatite whiskers;Medical device industry;Mesenchymal stem cell;Mineralized extracellular matrixes;Poly lactic acid;Structure preservation;Surface modification methods;Ethylenediaminetetraacetic acid
摘要：
A hydroxyapatite whisker (w-HA) was synthesized via dissolution-precipitation by forming calcium-ethylene diamine tetra acetic acid (Ca-EDTA) complexing. The hydroxyapatite whisker was formed with precipitation of Ca2+ along the c-axis due to the space inhibition of Ca-EDTA complex during refluxing. The op-w-HA (oligomeric poly(lactic acid) modified w-HA), p-w-HA (poly(L-lactide) modified w-HA) and pc-w-HA (poly(L-lactide) and cyclodextrin modified w-HA) were obtained via the surface modification of w-HA. The particle size, surface charge and biocompatibility of theses modified w-HA particles were successfully adjusted. Among these materials, pc-w-HA exhibited nearly no toxicity, better adhesion to mesenchymal stem cells (MSCs) (5 times better than w-HA) and greater osteoinductivity among the obtained materials (40% of mineralized extracellular matrix higher than w-HA) due to better surface properties. Different kinds of powders (w-HA, p-w-HA and pc-w-HA) were blended with PLLA (poly(L-Lactide)) to form a composite material, respectively. The pc-w-HA/PLLA composite showed better mechanical properties (tensile strength of the pc-w-HA/PLLA composite was 22.3% higher than that of w-HA/PLLA), which could be attributed to mainly two factors including the structure preservation of w-HA bundles and pseudorotaxane linkage between PLA-cyclodextrin and PLLA. The MSCs adhesion of the pc-w-HA/PLLA composite was much better due to balanced hydrophilicity/hydrophobicity and surface roughness. This surface modification method could provide a new and effective strategy for the preparation of bioresorbable composite material with great bioactivity and mechanical property, which has great potential in the medical device industry. © 2020 IOP Publishing Ltd.
语种：
英文
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The Effects of Reversibility of H2-H3 Phase Transition on Ni-Rich Layered Oxide Cathode for High-Energy Lithium-Ion Batteries
作者：
Chen, Jie;Yang, Huiping;Li, Nanhao;Liu, Chaoyang;Tong, Hui;...
期刊：
FRONTIERS IN CHEMISTRY ,2019年7:478270 ISSN：2296-2646
通讯作者：
Li, Lingjun
作者机构：
[Duan, Junfei; Li, Nanhao; Chen, Jiaxin; Yang, Huiping; Xia, Lingfeng; Chen, Zhaoyong; Liu, Chaoyang; Liu, Zengsheng; Chen, Jie; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha, Hunan, Peoples R China.;[Tong, Hui] Cent South Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.;[Li, Lingjun] Changsha Univ Sci & Technol, Hunan Prov Key Lab Modeling & Monitoring Near Ear, Changsha, Hunan, Peoples R China.
通讯机构：
[Li, Lingjun] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha, Hunan, Peoples R China.;Changsha Univ Sci & Technol, Hunan Prov Key Lab Modeling & Monitoring Near Ear, Changsha, Hunan, Peoples R China.
关键词：
cathode materials;LiNi0.8Co0.1Mn0.1O2;lithium ion batteries;phase transitions;Ti-doped
摘要：
Although LiNi0.8Co0.1Mn0.1O2 is attracting increasing attention on account of its high specific capacity, the moderate cycle lifetime still hinders its large-scale commercialization applications. Herein, the Ti-doped LiNi0.8Co0.1Mn0.1O2 compounds are successfully synthesized. The Li(Ni0.8Co0.1Mn0.1)0.99Ti0.01O2 sample exhibits the best electrochemical performance. Under the voltage range of 2.7–4.3 V, it maintains a reversible capacity of 151.01 mAh·g−1 with the capacity retention of 83.98% after 200 cycles at 1 C. Electrochemical impedance spectroscopy (EIS) and differential capacity profiles during prolonged cycling demonstrate that the Ti doping could enhance both the abilities of electronic transition and Li ion diffusion. More importantly, Ti doping can also improve the reversibility of the H2-H3 phase transitions during charge-discharge cycles, thus improving the electrochemical performance of Ni-rich cathodes. © Copyright © 2019 Chen, Yang, Li, Liu, Tong, Chen, Liu, Xia, Chen, Duan and Li.
语种：
英文
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Effect of Zr doping and Li2O-2B2O3 layer on the structural electrochemical properties of LiNi0.5Co0.2Mn0.3O2 cathode material: experiments and first-principle calculations
作者：
Song, Liubin;Li, Xinyu;Xiao, Zhongliang* ;Li, Lingjun;Cao, Zhong;...
期刊：
Ionics ,2019年25(5):2017-2026 ISSN：0947-7047
通讯作者：
Xiao, Zhongliang
作者机构：
[Xiao, Zhongliang; Song, Liubin; Li, Xinyu; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[Zhu, Huali; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Xiao, Zhongliang] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
Cathodes;Density functional theory;Doping (additives);Electric discharges;Energy gap;Lithium-ion batteries;Manganese compounds;Nickel compounds;Zirconium;Battery performance;Cycling performance;Electrochemical performance;First principle calculations;Generalized gradient approximations;Initial discharge capacities;LiNi0.5Co0.2Mn0.3O2;Modification methods;Lithium compounds
摘要：
In order to enhance the electrochemical performance of LiNi0.5Co0.2Mn0.3O2 (NCM), an in situ doping with zirconium (Zr) by wet grind-solid state method then coating with Li2O-2B2O3 (LBO) by crystal phase selection method is successfully developed. At the same time, based on the density functional theory (DFT) with the generalized gradient approximation (GGA), use of the first-principle calculation method theoretically proved the experimental results. The XRD results of experimental and the calculated both revealed the lattice parameters become larger after Zr doped. The thickness of the LBO layer uniformly deposited on the surface of the Zr-doped sample is 5nm, which can scavenge and neutralize HF erosion. Particularly, the Zr-doped and LBO-coated NCM sample exhibited excellent cycling performance with 90.5% capacity retention after 100cycles at 1C, which are apparently higher than 76.97% of NCM. The initial discharge capacity of double optimized sample was 170.4mAhg−1 at 1C which is higher than 157.1mAhg−1 of NCM. Zr and LBO layers can effectively reduce the energy of the system and the band gap. Obtained results were consistent with the experimental results. Therefore, co-modification method plays an import role to optimize the material from the structure to the surface and hence greatly improved the battery performance. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.
语种：
英文
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Co9S8 confined in bifunctional N/S co-doped carbon/carbon with high electrochemical performance for lithium-ion batteries
作者：
Wu, Yinglong;Zhu, Chao;Shu, Lin;Duan, Junfei
* （ ;Wei, Donghai;...
期刊：
Applied Surface Science ,2019年489:528-537 ISSN：0169-4332
通讯作者：
Duan, Junfei
（ ;Zhu, Zhiying
作者机构：
[Duan, Junfei; Shu, Lin; Zhu, Chao; Chen, Zhaoyong; Wu, Yinglong; Wei, Donghai; Xu, Jiaxiong; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410111, Hunan, Peoples R China.;[Zhu, Zhiying] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410111, Hunan, Peoples R China.;[Peng, Zhuoyin] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Educ Dept Hunan Prov, Key Lab Efficient & Clean Energy Utilizat, Changsha 410111, Hunan, Peoples R China.
通讯机构：
[Duan, Junfei; Zhu, Zhiying] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410111, Hunan, Peoples R China.;Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410111, Hunan, Peoples R China.
关键词：
Bifunctional N/S co-doped carbon/carbon;Co9S8/NSC@C;Half/full cell;In-situ polymerization;Lithium ion batteries
摘要：
The lithium storage performance of Co9S8 suffers from the poor cycling performance due to the inferior electron conductivity, huge volume expansion and structure deterioration during cycling. Herein, we develop a new approach to prepare the Co9S8 embedded in bifunctional N/S co-doped carbon/carbon (Co9S8/NSC@C) via the pyrolysis of S- and Co(II)-containing polypyrrole precursor accompanied by Ethanol Steam Reforming. The process simultaneously restricted the Co9S8 grains growth and conducted carbon deposition on the outer surface of Co9S8 nanoparticles. Such unique structure of the Co9S8/NSC@C electrode material exhibits superior lithium storage performance, delivering a high reversible specific capacity of 580 mAh g−1 after 200 cycles at 0.1 A g−1 for half-cell and a good rate capability with a reversible capacity of 159 mAh g−1 at various current densities after 60 cycles for full-cell. The function-oriented design of Co9S8/NSC@C might open new avenues for the preparation of similar electrode materials. © 2019 Elsevier B.V.
语种：
英文
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Simultaneously Dual Modification of Ni-Rich Layered Oxide Cathode for High-Energy Lithium-Ion Batteries
作者：
Yang, Huiping;Wu, Hong-Hui;Ge, Mingyuan;Li, Lingjun* ;Yuan, Yifei;...
期刊：
Advanced Functional Materials ,2019年29(13):1808825- ISSN：1616-301X
通讯作者：
Li, Lingjun;Zhang, Qiaobao;Lu, Jun
作者机构：
[Duan, Junfei; Yang, Huiping; Xia, Lingfeng; Chen, Jie; Li, Lingjun; Yao, Qi; Chen, Zhaoyong] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Zhang, Qiaobao] Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Fujian, Peoples R China.;[Lu, Jun; Yuan, Yifei] Argonne Natl Lab, Chem Sci & Engn Div, 9700 South Cass Ave, Argonne, IL 60439 USA.;[Wu, Hong-Hui; Zeng, Xiao Cheng] Univ Nebraska, Dept Chem, Lincoln, NE 68588 USA.;[Lee, Wah-Keat; Kisslinger, Kim; Ge, Mingyuan] Brookhaven Natl Lab, NSLS 2, Upton, NY 11973 USA.
通讯机构：
[Li, Lingjun] C;[Zhang, Qiaobao] X;[Lu, Jun] A;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;Xiamen Univ, Coll Mat, Dept Mat Sci & Engn, Xiamen 361005, Fujian, Peoples R China.
关键词：
DFT calculation;dual-modification strategy;lithium-ion batteries;Ni-rich materials;synchronous synthesis
摘要：
<jats:title>Abstract</jats:title><jats:p>A critical challenge in the commercialization of layer‐structured Ni‐rich materials is the fast capacity drop and voltage fading due to the interfacial instability and bulk structural degradation of the cathodes during battery operation. Herein, with the guidance of theoretical calculations of migration energy difference between La and Ti from the surface to the inside of LiNi<jats:sub>0.8</jats:sub>Co<jats:sub>0.1</jats:sub>Mn<jats:sub>0.1</jats:sub>O<jats:sub>2</jats:sub>, for the first time, Ti‐doped and La<jats:sub>4</jats:sub>NiLiO<jats:sub>8</jats:sub>‐coated LiNi<jats:sub>0.8</jats:sub>Co<jats:sub>0.1</jats:sub>Mn<jats:sub>0.1</jats:sub>O<jats:sub>2</jats:sub> cathodes are rationally designed and prepared, via a simple and convenient dual‐modification strategy of synchronous synthesis and in situ modification. Impressively, the dual modified materials show remarkably improved electrochemical performance and largely suppressed voltage fading, even under exertive operational conditions at elevated temperature and under extended cutoff voltage. Further studies reveal that the nanoscale structural degradation on material surfaces and the appearance of intergranular cracks associated with the inconsistent evolution of structural degradation at the particle level can be effectively suppressed by the synergetic effect of the conductive La<jats:sub>4</jats:sub>NiLiO<jats:sub>8</jats:sub> coating layer and the strong TiO bond. The present work demonstrates that our strategy can simultaneously address the two issues with respect to interfacial instability and bulk structural degradation, and it represents a significant progress in the development of advanced cathode materials for high‐performance lithium‐ion batteries.</jats:p>
语种：
英文
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Controllable construction of interconnected SnOx/N-doped carbon/carbon composite for enhanced-performance lithium-ion batteries anodes
作者：
Zhu, Chao;Wei, Donghai;Wu, Yinglong;Zhang, Zeng;Zhang, Guanhua;...
期刊：
Journal of Alloys and Compounds ,2019年778:731-740 ISSN：0925-8388
通讯作者：
Duan, Junfei
（ ;Chen, Zhaoyong
作者机构：
[Duan, Junfei; Duan, JF; Chen, Zhaoyong; Zhu, Chao; Zhang, Zeng; Zhu, Huali; Zhu, Zhiying; Wu, Yinglong; Wei, Donghai; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhang, Guanhua] Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Duan, JF; Chen, ZY] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Anodes;Carbon;Carbon carbon composites;Doping (additives);Ethanol;Ions;Nanocrystalline materials;Nanocrystals;Polypyrroles;Steam reforming;Carbonaceous species;Electrochemical performance;Ethanol steam reforming;Lithiation/delithiation;N-doped;Nanocrystallines;Rechargeable lithium ion battery;Sacrificial templates;Lithium-ion batteries
摘要：
Tin-based materials have been considered as promising anode materials for their high theoretical capacities in rechargeable lithium ion batteries. However, the large volume variation during repeated lithiation/delithiation processes, leads to aggregation and pulverization of active materials, which limits their practical application. Herein, a facile and effective strategy was designed to construct interconnected porous SnOx/N-doped carbon framework, using Sn(IV)-containing polypyrrole as sacrificial template/precursor followed by depositing carbonaceous species via ethanol steam reforming process. Benefiting from the synergistic effects between ultrafine SnO2 and Sn nanocrystals, porous N-doped carbon and carbon matrices derived from polypyrrole and ethanol, respectively, the composite exhibits large reversible capacity of 728.6 mAh g−1 after 140 cycles at 100 mA g−1, and a long-term cycling performance of 435 mAh g−1 after 500 cycles even at 1000 mA g−1. The remarkable high electrochemical performance, together with the scalable production and low-cost starting materials, will advance the promising application of Sn-based composite to next generation rechargeable batteries. © 2018 Elsevier B.V.
语种：
英文
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High Performance and Structural Stability of K and Cl Co-Doped LiNi0.5Co0.2Mn0.3O2 Cathode Materials in 4.6 Voltage.
作者：
Chen, Zhaoyong;Gong, Xiaolong;Zhu, Huali;Cao, Kaifeng;Liu, Qiming;...
期刊：
FRONTIERS IN CHEMISTRY ,2019年6(JAN):643 ISSN：2296-2646
通讯作者：
Chen, ZY
作者机构：
[Duan, Junfei; Chen, Zhaoyong; Gong, Xiaolong; Cao, Kaifeng; Liu, Qiming; Liu, Jun; Li, Lingjun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.;[Zhu, Huali] Changsha Univ Sci & Technol, Coll Phys & Elect Sci, Changsha, Hunan, Peoples R China.;[Zhu, Huali] Univ New Hampshire, Dept Chem, Durham, NH 03824 USA.
通讯机构：
[Chen, ZY ] ;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.
关键词：
LiNi0.5Co0.2Mn0.3O2;cation mixing;co-doping;lithium ion batteries;phase transition
摘要：
The high energy density lithium ion batteries are being pursued because of their extensive application in electric vehicles with a large mileage and storage energy station with a long life. So, increasing the charge voltage becomes a strategy to improve the energy density. But it brings some harmful to the structural stability. In order to find the equilibrium between capacity and structure stability, the K and Cl co-doped LiNi0.5Co0.2Mn0.3O2 (NCM) cathode materials are designed based on defect theory, and prepared by solid state reaction. The structure is investigated by means of X-ray diffraction (XRD), rietveld refinements, scanning electron microscope (SEM), XPS, EDS mapping and transmission electron microscope (TEM). Electrochemical properties are measured through electrochemical impedance spectroscopy (EIS), cyclic voltammogram curves (CV), charge/discharge tests. The results of XRD, EDS mapping, and XPS show that K and Cl are successfully incorporated into the lattice of NCM cathode materials. Rietveld refinements along with TEM analysis manifest K and Cl co-doping can effectively reduce cation mixing and make the layered structure more complete. After 100 cycles at 1 C, the K and Cl co-doped NCM retains a more integrated layered structure compared to the pristine NCM. It indicates the co-doping can effectively strengthen the layer structure and suppress the phase transition to some degree during repeated charge and discharge process. Through CV curves, it can be found that K and Cl co-doping can weaken the electrode polarization and improve the electrochemical performance. Electrochemical tests show that the discharge capacity of Li0.99K0.01(Ni0.5Co0.3Mn0.2)O1.99Cl0.01 (KCl-NCM) are far higher than NCM at 5 C, and capacity retention reaches 78.1% after 100 cycles at 1 C. EIS measurement indicates that doping K and Cl contributes to the better lithium ion diffusion and the lower charge transfer resistance.
语种：
英文
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Improved Electrochemical Performance of Surface Coated LiNi0.80Co0.15Al0.05O2 With Polypyrrole
作者：
Chen, Zhaoyong* ;Cao, Kaifeng;Zhu, Huali;Gong, Xiaolong;Liu, Qiming;...
期刊：
FRONTIERS IN CHEMISTRY ,2019年6(JAN):648 ISSN：2296-2646
通讯作者：
Chen, Zhaoyong
作者机构：
[Duan, Junfei; Liu, Qiming; Cao, Kaifeng; Gong, Xiaolong; Chen, Zhaoyong; Li, Lingjun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.;[Zhu, Huali] Changsha Univ Sci & Technol, Coll Phys & Elect Sci, Changsha, Hunan, Peoples R China.;[Zhu, Huali] Univ New Hampshire, Dept Chem, Durham, NH 03824 USA.
通讯机构：
[Chen, Zhaoyong] C;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.
关键词：
cathode materials;conductive polymer;lithium-ion batteries;nickel-rich layered oxide;polypyrrole coating
摘要：
Nickel-rich ternary layered oxide (LiNi0.80Co0.15Al0.05O2, LNCA) cathodes are favored in many fields such as electric vehicles due to its high specific capacity, low cost, and stable structure. However, LNCA cathode material still has the disadvantages of low initial coulombic efficiency, rate capability and poor cycle performance, which greatly restricts its commercial application. To overcome this barrier, a polypyrrole (PPy) layer with high electrical conductivity is designed to coat on the surface of LNCA cathode material. PPy coating layer on the surface of LNCA successfully is realized by means of liquid-phase chemical oxidation polymerization method, and which has been verified by the scanning electron microscopy (SEM), transmission electron microscope (TEM) and fourier transform infrared spectroscopy (FTIR). PPy-coated LNCA (PL-2) exhibits satisfactory electrochemical performances including high reversible capacity and excellent rate capability. Furthermore, the capability is superior to pristine LNCA. So, it provides a new structure of conductive polymer modified cathode materials with good property through a mild modification method.
语种：
英文
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Non-aqueous dual-carbon lithium-ion capacitors: a review
作者：
Li, Guangchao;Yang, Zhewei;Yin, Zhoulan;Guo, Huajun;Wang, Zhixing;...
期刊：
Journal of Materials Chemistry A ,2019年7(26):15541-15563 ISSN：2050-7488
通讯作者：
Wang, Jiexi
作者机构：
[Li, Guangchao; Yin, Zhoulan; Yang, Zhewei; Guo, Huajun; Wang, Zhixing; Yan, Guochun; Wang, Jiexi] Cent South Univ, Coll Chem & Chem Engn, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.;[Liu, Yong; Wang, Jiexi] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.;[Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Wang, Jiexi] C;Cent South Univ, Coll Chem & Chem Engn, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China.;Cent South Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.
摘要：
By reducing the gap between lithium-ion batteries (LIBs) and supercapacitors (SCs) effectively, lithium-ion capacitors (LICs) have attracted tremendous attention among various electrochemical energy storage systems because they exhibit a high energy density (inherited from the LIBs), a high power output, long lifespan (owing to the SCs) and favorable chemical stability. Carbonaceous electrode materials play significant roles in high performance dual-carbon LICs whether positive or negative. Here, the working mechanism, cell design principle and recent progress in carbon-based electrode materials for dual-carbon LICs are illustrated. Then, the commercialization of LICs is discussed briefly. Finally, some suggestions for the future developments associated with dual-carbon LICs are proposed.
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英文
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A new chloromethylation method based on polystyrene-divinylbenzene
作者：
Fu, Yuli;Huang, Xiaobei;Zhong, Shihua* ;Yi, Wen-Jun* ;Li, Li-Jun*
期刊：
Chemical Papers ,2019年73(9):2183-2188 ISSN：2585-7290
通讯作者：
Zhong, Shihua;Yi, Wen-Jun;Li, Li-Jun
作者机构：
[Fu, Yuli; Zhong, Shihua; Huang, Xiaobei] Hunan Normal Univ, Key Lab Assembly & Applicat Organ Funct Mol, Changsha 410081, Hunan, Peoples R China.;[Yi, Wen-Jun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Li, Li-Jun] Hunan Inst Sci & Technol, Coll Chem & Chem Engn, Yueyang 414006, Hunan, Peoples R China.
通讯机构：
[Zhong, Shihua; Li, Li-Jun] H;[Yi, Wen-Jun] C;Hunan Normal Univ, Key Lab Assembly & Applicat Organ Funct Mol, Changsha 410081, Hunan, Peoples R China.;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;Hunan Inst Sci & Technol, Coll Chem & Chem Engn, Yueyang 414006, Hunan, Peoples R China.
关键词：
Chloromethylation;Polystyrene–divinylbenzene
摘要：
The chloromethylated polystyrene–divinylbenzene (Cl-PS–DVB) was obtained via the chloromethylation of high cross-linked polystyrene–divinylbenzene (PS–DVB). Methylal, trioxymethylene and thionyl chloride were applied as reactants. The obtained Cl-PS–DVB (chloromethylated polystyrene–divinylbenzene) was characterized by the BET and FT-IR. Also, the catalyst, reaction time and reaction temperature were optimized. The chlorine content of the obtained Cl-PS–DVB reached 19% under the catalysis of FeCl3 at 45°C. The chloromethylation method was thought to be environmental friendly because low toxic reactant (methylal, trioxymethylene and thionyl chloride) were applied in the in situ chloromethylation of PS–DVB in this process instead of using hypertoxic chloromethyl ether (BCME) directly. Also, the low production cost of this reaction gives it a bright prospect in industrial application. © 2019, Institute of Chemistry, Slovak Academy of Sciences.
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英文
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Porous Hollow Superlattice NiMn2O4/NiCo2O4 Mesocrystals as a Highly Reversible Anode Material for Lithium-ion Batteries
作者：
Li, Lingjun* ;Yao, Qi;Liu, Jiequn;Ye, Kaibo;Liu, Boyu;...
期刊：
FRONTIERS IN CHEMISTRY ,2018年6(MAY):153 ISSN：2296-2646
通讯作者：
Li, Lingjun;Zhang, Bao
作者机构：
[Duan, Junfei; Yao, Qi; Yang, Huiping; Chen, Zhaoyong; Liu, Zengsheng; Liu, Boyu; Ye, Kaibo; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha, Hunan, Peoples R China.;[Li, Lingjun] Changsha Univ Sci & Technol, Hunan Prov Key Lab Efficient & Clean Energy Utili, Changsha, Hunan, Peoples R China.;[Liu, Jiequn] Soochow Univ, Sch Iron & Steel, Suzhou, Peoples R China.;[Zhang, Bao] Cent S Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.
通讯机构：
[Li, Lingjun; Zhang, Bao] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha, Hunan, Peoples R China.;Changsha Univ Sci & Technol, Hunan Prov Key Lab Efficient & Clean Energy Utili, Changsha, Hunan, Peoples R China.;Cent S Univ, Sch Met & Environm, Changsha, Hunan, Peoples R China.
关键词：
electrochemical kinetics;hollow multi-porous architecture;lithium-ion battery;superlattice structure;transition metal oxide
摘要：
As a promising high-capacity anode material for Li-ion batteries, NiMn2O4 always suffers from the poor intrinsic conductivity and the architectural collapse originating from the volume expansion during cycle. Herein, a combined structure and architecture modulation is proposed to tackle concurrently the two handicaps, via a facile and well-controlled solvothermal approach to synthesize NiMn2O4/NiCo2O4 mesocrystals with superlattice structure and hollow multi-porous architecture. It is demonstrated that the obtained NiCo1.5Mn0.5O4 sample is made up of a new mixed-phase NiMn2O4/NiCo2O4 compound system, with a high charge capacity of 532.2 mAh g-1 with 90.4% capacity retention after 100 cycles at a current density of 1 A g-1. The enhanced electrochemical performance can be attributed to the synergistic effects of the superlattice structure and the hollow multi-porous architecture of the NiMn2O4/NiCo2O4 compound. The superlattice structure can improve ionic conductivity to enhance charge transport kinetics of the bulk material, while the hollow multi-porous architecture can provide enough void spaces to alleviate the architectural change during cycling, and shorten the lithium ions diffusion and electron-transportation distances. © 2018 Li, Yao, Liu, Ye, Liu, Liu, Yang, Chen, Duan and Zhang.
语种：
英文
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In situ construction of interconnected SnO2/nitrogen-doped Carbon@TiO2 networks for lithium-ion half/full cells
作者：
Wei, Donghai;Zhong, Siyu;Zhang, Hang;Zhang, Xiaojia;Zhu, Chao;...
期刊：
Electrochimica Acta ,2018年290:312-321 ISSN：0013-4686
通讯作者：
Duan, Junfei
（ ;Zhang, Guanhua
作者机构：
[Duan, Junfei; Zhu, Chao; Chen, Zhaoyong; Liu, Peng; Wei, Donghai; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Zhang, Guanhua; Duan, Huigao; Zhang, Hang; Zhang, Xiaojia; Zhong, Siyu] Hunan Univ, Coll Mech & Vehicle Engn, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Duan, Junfei] C;[Zhang, Guanhua] H;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Hunan Univ, Coll Mech & Vehicle Engn, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Hunan, Peoples R China.
关键词：
SnO2;Nitrogen-doped carbon;Atomic layer deposition;Lithium ion battery;Full cell
摘要：
A one-pot in situ pyrrole polymerization strategy, followed by controllable atomic layer deposition of TiO<inf>2</inf> and pyrolysis process, is carried out to construct the core-shell SnO<inf>2</inf>/NC@TiO<inf>2</inf> with sub-5 nm SnO<inf>2</inf> nanoparticles uniformly dispersing in interconnected nitrogen-doped carbon nanospheres coated by TiO<inf>2</inf> layer. Benefiting from the unique structural stability of SnO<inf>2</inf>/NC@TiO<inf>2</inf>, as anode materials for LIBs, they show much improved cycling stability and rate capability compared with the bare SnO<inf>2</inf> and SnO<inf>2</inf>/NC electrodes. Specifically, the SnO<inf>2</inf>/NC@TiO<inf>2</inf> electrode with a 10 nm TiO<inf>2</inf> coating layer demonstrate the optimal lithium ion storage performance, delivering initial discharge capacity of 1224 mAh g<sup>−1</sup> with a first-cycle Columbic efficiency of 72.3% and 871 mAh g<sup>−1</sup> after 200 cycles at 100 mA g<sup>−1</sup>. Moreover, the assembled SnO<inf>2</inf>/NC@TiO<inf>2</inf>//LiFePO<inf>4</inf> full cell demonstrates a good rate capability with a reversible capacity of 145 mAh g<sup>−1</sup> (67% capacity retention of the initial value) when the electrode undergoes various current densities after 70 cycles. The improved electrochemical performance is mainly attributed to the surface interface engineering by the interconnected carbon matrix as well as the uniform TiO<inf>2</inf> outer layer. These achieved results suggest that interconnected SnO<inf>2</inf>/NC@TiO<inf>2</inf> electrodes have the potential to be used as anode for high-performance lithium ion battery.<br/> ©2018 Elsevier Ltd
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英文
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Synthesis of poly(l-lactide)/β-cyclodextrin/citrate network modified hydroxyapatite and its biomedical properties
作者：
Yi, Wen-Jun;Li, Li-Jun;He, Hao;Hao, Zhen;Liu, Bo;...
期刊：
NEW JOURNAL OF CHEMISTRY ,2018年42(18):14729-14732 ISSN：1144-0546
通讯作者：
Chao, Zi-Sheng;Shen, Yi
作者机构：
[Liu, Bo; Chao, Zi-Sheng; Hao, Zhen; Yi, Wen-Jun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[He, Hao; Chao, Zi-Sheng; Li, Li-Jun; Yi, Wen-Jun] Hunan Univ, Coll Chem & Chem Engn, Changsha 410114, Hunan, Peoples R China.;[Shen, Yi] Cent S Univ, Xiangya Hosp 2, Dept Orthopaed, Changsha 410011, Hunan, Peoples R China.
通讯机构：
[Chao, Zi-Sheng; Shen, Yi] C;[Chao, Zi-Sheng] H;Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;Hunan Univ, Coll Chem & Chem Engn, Changsha 410114, Hunan, Peoples R China.;Cent S Univ, Xiangya Hosp 2, Dept Orthopaed, Changsha 410011, Hunan, Peoples R China.
关键词：
beta cyclodextrin;calcium ion;citric acid;hydroxyapatite;hydroxyl group;polylactide;animal cell;Article;biocompatibility;biological activity;biomedical engineering;cell adhesion;cell viability;chelation;controlled study;cross linking;cytotoxicity;mesenchymal stem cell;nonhuman;particle size;priority journal;ring opening metathesis polymerization;surface property;synthesis;tissue engineering
摘要：
Hydroxyapatite (HA) was modified by the chelation of citric acid and Ca2+ on the surface of HA, followed by cross-linking between the hydroxyl groups of β-cyclodextrin (β-CD) and citrate, and then further in situ ring-opening polymerization of l-lactide over the hydroxyl groups. The modification of HA adjusted its surface properties and reduced the particle size. The synthesized PLA-CD-HA-72 exhibited the good adhesion of mesenchymal stem cells (MSCs) of Wistar rats, higher viability of MSCs and larger osteoinductivity. The results indicated that the PLA-CD-HA-72 possessed a rather large biocompatibility and bioactivity, and it could be a promising candidate as a bone tissue engineering material. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2018.
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英文
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Effect of Controlled-Atmosphere Storage and Ethanol Rinsing on NaNi0.5Mn0.5O2 for Sodium-Ion Batteries
作者：
Zheng, Lituo;Li, Lingjun;Shunmugasundaram, Ramesh;Obrovac, M. N.*
期刊：
ACS Applied Materials & Interfaces ,2018年10(44):38246-38254 ISSN：1944-8244
通讯作者：
Obrovac, M. N.
作者机构：
[Obrovac, M. N.; Zheng, Lituo; Shunmugasundaram, Ramesh; Li, Lingjun] Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada.;[Li, Lingjun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Obrovac, M. N.] D;Dalhousie Univ, Dept Chem, Halifax, NS B3H 4R2, Canada.
关键词：
sodium-ion batteries;layered cathode material;NaNi0.5Mn0.5O2;air sensitivity;surface modification;ethanol rinse;surface impurities
摘要：
NaNi0.5Mn0.5O2 is a promising sodium-ion battery cathode material that has been extensively studied. However, the air sensitivity of this material limits practical application and is not well understood. Here, we present a detailed study of NaNi0.5Mn0.5O2 powders stored in different atmospheres (oxygen, argon, and carbon dioxide), either dry or wet. X-ray diffraction and Fourier transform infrared measurements were used to characterize the materials and their surface species before and after controlled-atmosphere storage. It was determined that the exposure of untreated NaNi0.5Mn0.5O2 powders to moisture results in desodiation and material degradation, leading to poor cycling. This effect was found to be caused by reactive surface species. From these results, a simple ethanol washing method was found to significantly reduce the air-reactivity and improve the electrochemical performance of NaNi0.5Mn0.5O2 by removing surface impurities formed by air exposure.
语种：
英文
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Poly(l-lactide)/cyclodextrin/citrate networks modified hydroxyapatite and its role as filler in the promotion to the properties of poly(l-lactide) biomaterials
作者：
Yi, Wen-Jun;Li, Li-Jun;He, Hao;Hao, Zhen;Liu, Bo;...
期刊：
Polymer ,2018年145:1-10 ISSN：0032-3861
通讯作者：
Chao, Zi-Sheng
作者机构：
[Li, Li-Jun; Chao, Zi-Sheng; Hao, Zhen; Yi, Wen-Jun] Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.;[He, Hao; Liu, Bo; Chao, Zi-Sheng] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Shen, Yi] Cent S Univ, Dept Orthopaed, Xiangya Hosp 2, Changsha 410011, Hunan, Peoples R China.
通讯机构：
[Chao, Zi-Sheng] H;Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Cell adhesion;Cyclodextrin-based network;Hydroxyapatite;Mechanical properties;Osteoinductivity;Poly (L-lactide)
摘要：
In this work, hydroxyapatite (HA) was modified by chelation of citric acid and Ca on the surface of HA, followed by the cross-linking between the hydroxyl groups of beta-CD and citrate, and then the further in situ ring-opening polymerization (ROP) of L-lactide over the hydroxyl groups. The as-synthesized filler were characterized by FT-IR, XRD, TGA, and SEM. The results showed that HA was successfully modified with beta-CD/citrate/PLA networks. The grafting amount of PLA-CD-HA-72 (beta-CD/citrate/PLA) is up to 15.0 wt%, while the amount of PLA is 11.7 wt%. The modification of HA greatly improves the bioactivity. Comparing the synthesized samples, PLA-CD-HA-72 shows a better cell adhesion and higher viability to the mesenchymal stem cells (MSCs) of Wistar rat. Also the osteoinductivity of the PLA-CD-HA-72 is much higher than the others. Various composites are prepared by PLLA filled with HA, CD-HA and PLA-CD-HA-72, respectively. Among these composites, tensile strength of the PLA-CD-HA-72/PLLA with 2.5 wt% of filler reached 41.7 +/- 2.2 MPa, which is much higher than that of the pure PLLA (31.7 +/- 1.3MPa). The addition of the PLA-CD-HA-72 significantly improves the bioactivity and mechanical properties of the composite simultaneously. This kind of composite with good biocompatibility and mechanical properties is a good candidate for promising bioresorbable material. (C) 2018 Published by Elsevier Ltd.
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英文
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Enhanced cycle stability of Na0.9Ni0.45Mn0.55O2 through tailoring O3/P2 hybrid structures for sodium-ion batteries
作者：
Chen, Jie;Li, Lingjun* ;Wu, Ling;Yao, Qi;Yang, Huiping;...
期刊：
Journal of Power Sources ,2018年406(Dec.1):110-117 ISSN：0378-7753
通讯作者：
Li, Lingjun
作者机构：
[Duan, Junfei; Yao, Qi; Yang, Huiping; Xia, Lingfeng; Chen, Zhaoyong; Liu, Zengsheng; Chen, Jie; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Li, Lingjun] Changsha Univ Sci & Technol, Hunan Prov Key Lab Modeling & Monitoring Near Ear, Sch Phys & Elect Sci, Changsha 410114, Hunan, Peoples R China.;[Zhong, Shengkui; Wu, Ling] Soochow Univ, Sch Iron & Steel, Suzhou 215000, Peoples R China.
通讯机构：
[Li, Lingjun] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
Cathodes;Manganese oxide;Metal ions;Nickel oxide;Sodium compounds;Sodium-ion batteries;Stability;Cycling stability;Hybrid structure;Initial discharge capacities;Layered oxides;Long term stability;Nickel manganese oxide;Structural degradation;Structural stabilities;Phosphorus compounds
摘要：
A critical challenge for the practical use of the layered O3-type binary nickel manganese oxides for sodium-ion batteries is the poor structural stability during extended cycling. The approaches of constructing O3/P2 hybrid composites can partially improve the cycling stability, but general approaches sacrifice the advantages of high capacity and low cost of the O3-type cathodes due to excessive sodium deficiency and lithium substitution. Here, we rationally design a serial of novel O3-majority hybrid Na0.9-xNi0.45Mn0.55O2 (x = 0.02, 0.04 and 0.08) cathodes, which exhibit high capacities while maintaining exceptional long-term stability. Particularly, the optimized O3/P2 Na0.88Ni0.45Mn0.55O2 composite delivers 106.7 mA h·g−1 with 71.1% capacity retention after 250 cycles at 1 C (1C = 150 mA g−1), the cyclability is 32% higher than that of the O3–Na0.9Ni0.45Mn0.55O2 cathode; and it also delivers a initial discharge capacity of 75.9 mA h·g−1, maintaining 72.4% capacity retention after 1000 cycles at 10 C. More importantly, the post-cycling analyses demonstrate O3/P2 hybrid phases successfully suppress the structural degradation of Na0.9Ni0.45Mn0.55O2 during battery operation. This study provides new perspectives in designing high performance cathodes for sodium-ion batteries. © 2018 Elsevier B.V.
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英文
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新能源材料与器件专业本科生就业分析
作者：
李灵均;陈召勇;段军飞;宋刘斌;朱华丽
期刊：
科技资讯 ,2018年16(16):174-175 ISSN：1672-3791
作者机构：
长沙理工大学材料科学与工程学院 湖南长沙 410114;[陈召勇; 李灵均; 宋刘斌; 朱华丽; 段军飞] 长沙理工大学
关键词：
新能源材料与器件;大学生就业;人力资源
摘要：
为满足新能源开发与利用这一迫切需求,国家于2011年特别设立"新能源材料与器件"专业。本报告选取了三所不同类型、不同地域、具有不同行业背景且开办新能源材料与器件专业较早的高校,通过调研取得了这三所高校新能源材料与器件专业毕业生就业状况的一手资料,数据分析表明我国新能源材料与器件人才供不应求的局面将长期存在。
语种：
中文
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Modification research of LiAlO2-coated LiNi0.8Co0.1Mn0.1O2 as a cathode material for lithium-ion battery
作者：
Xiao, Zhongliang;Hu, Chaoming;Song, Liubin* ;Li, Lingjun;Cao, Zhong;...
期刊：
Ionics ,2018年24(1):91-98 ISSN：0947-7047
通讯作者：
Song, Liubin
作者机构：
[Tang, Fuli; Xiao, Zhongliang; Liu, Jiao; Song, Liubin; Li, Xinyu; Hu, Chaoming; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[Zhu, Huali; Li, Lingjun] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Song, Liubin] C;Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
Binary alloys;Cathodes;Coated materials;Coatings;Electric batteries;Electric discharges;Electrochemical properties;Electrolytes;Lithium compounds;Lithium-ion batteries;Nickel alloys;Secondary batteries;Structural optimization;Capacity retention;Cath-ode materials;Discharge capacities;Electrochemical performance;Hydrothermal methods;LiAlO2;LiNi0.8Co0.1Mn0.1O2;Structure optimization;Lithium alloys
摘要：
The LiNi0.8Co0.1Mn0.1O2 with LiAlO2 coating was obtained by hydrolysis–hydrothermal method. The morphology of the composite was characterized by SEM, TEM, and EDS. The results showed that the LiAlO2 layer was almost completely covered on the surface of particle, and the thickness of coating was about 8–12nm. The LiAlO2 coating suppressed side reaction between composite and electrolyte; thus, the electrochemical performance of the LiAlO2-coated LiNi0.8Co0.1Mn0.1O2 was improved at 40°C. The LiAlO2-coated sample delivered a high discharge capacity of 181.2mAhg−1 (1C) with 93.5% capacity retention after 100cycles at room temperature and 87.4% capacity retention after 100cycles at 40°C. LiAlO2-coated material exhibited an excellent cycling stability and thermal stability compared with the pristine material. These works will contribute to the battery structure optimization and design. © 2017, Springer-Verlag Berlin Heidelberg.
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