期刊：
Journal of Materials Chemistry A,2022年10(44):23905-23914 ISSN：2050-7488
通讯作者：
Gen Chen
作者机构：
[Qin, Zuoyu; Wen, Zuxin; Li, Jiaqi; Zheng, Zhicheng; Chen, Gen; Zhang, Tao; Zhang, Ning] Cent South Univ, Sch Mat Sci & Engn, Key Lab Elect Packaging & Adv Funct Mat Hunan Pro, Changsha 410083, Peoples R China.;[Zhang, Ying; Liu, Xiaohe] Zhengzhou Univ, Zhongyuan Crit Met Lab, Zhengzhou 450001, Henan, Peoples R China.;[Zhang, Ying; Liu, Xiaohe] Zhengzhou Univ, Sch Chem Engn, Zhengzhou 450001, Henan, Peoples R China.;[Jia, Chuankun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Gen Chen] S;School of Materials Science and Engineering, Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province, Central South University, Changsha 410083, China
摘要：
With the ever-growing market of electric vehicles, spent lithium-ion batteries (LIBs) eventually turn into a very challenging issue to both the environment and resource sustainability. Recycling the valuable components in spent LIBs becomes a key link in the closed-loop LIB industry. Pretreatment is the primary procedure for recycling LIBs in view of component classification. Traditional separation methods usually destroy the active materials or current collectors. Herein, we report a facile one-step solvothermal pretreatment using ethanol as the solvent. The separation mechanism of cathode materials and Al foil via digestion of polyvinylidene fluoride has been discussed. The pretreatment causes minimum damage to both the LiNi0.5Co0.2Mn0.3O2 (NCM523) cathode material and Al foil. Subsequently, the degraded NCM523 powders are regenerated by repairing the layered crystal structure and restoring the lost Li. The regenerated NCM523 cathode delivers excellent electrochemical performance. This work provides a feasible and cost-effective strategy to recycle the Al current collector and regenerate spent cathode materials.
作者机构：
[Zou, Haitao; Zhong, Fangfang; Wang, Guixiang; Xu, Zhizhao; Jia, Chuankun; Zhu, Xiaobo; Ding, Mei] Changsha Univ Sci & Technol, Inst Energy Storage Technol, Changsha 410114, Peoples R China.;[Zou, Haitao; Zhong, Fangfang; Wang, Guixiang; Xu, Zhizhao; Jia, Chuankun; Zhu, Xiaobo; Ding, Mei] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.;[Tang, Ao] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.;[Qin, Chengpeng] Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China.;[You, Wei] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci BNLMS, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China.
通讯机构：
[Mei Ding; Chuankun Jia] I;Institute of Energy Storage Technology, Changsha University of Science & Technology, Changsha 410114, China<&wdkj&>College of Materials Science and Engineering, Changsha University of Science & Technology, Changsha 410114, China
关键词：
Energy storage;Flow battery;High concentration catholyte;Diverse ion effect;Zinc-iron flow battery
摘要：
A redox flow battery (RFB) system with improved energy density via unlocking the solubility limit of ferrocyanide in combination with low capital cost is demonstrated. Based on the diverse ion effect, the maximum ferrocyanide concentration increases from 0.76 M to 1.46 M at room temperature. By pairing with Zn(OH)(4)(2-)/Zn redox couple, the proposed alkaline zinc-iron RFB features excellent electrochemical performance, with slow capacity fade rate over 7600 cycles (0.00078% per cycle and 0.23% per day), high energy efficiency of 88.10% at 100 mA/cm(2), high energy density (73.64 Wh/L based on the catholyte side), and high power density (656.81 mW/cm(2)). Additionally, electrolyte cost of the proposed RFB is reduced to be only one tenth of all-vanadium RFBs. From the technoeconomic viewpoint, the present RFB shows promise for commercially storing energy.(C) 2022 Elsevier Ltd. All rights reserved.
摘要：
Ce-based organic framework materials [UIO-66(Ce)] were prepared, and the UIO-66(Ce)/ ZnCdS composite was attained by microwave irradiation. Moreover, the photocatalytic hydrogen production activity was evaluated. The experimental results revealed that the ZnCdS nanoparticle was decorated on the surface of UIO-66(Ce), and the hydrogen production ability of ZnCdS nanoparticle was improved by UIO-66(Ce) significantly. The hydrogen production yield of UIO-66(Ce)/ZnCdS reaches 3.958 mmol/g$h, in which is as about 1.95 times as that of ZnCdS (2.031 mmol/g$h). The improvement for photocatalytic hydrogen production yield is because UIO-66(Ce) can facilitate the photoinduced carriers to separating. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
摘要：
Recycling spent lithium-ion batteries (LIBs) is an urgent task in view of the resource shortage and environmental concerns. Here, a facile ternary molten salt approach is presented for efficiently regenerating the LiNi(0.5) Co(0.2) Mn(0.3) O(2) (NCM523) cathode of spent LIBs. Such an approach involves the treatment of spent cathode powder in the ternary molten salt at a moderate temperature (400°C) and subsequent annealing in oxygen. The Li loss and degraded phases in spent NCM that cause the capacity decay can be fully remedied after the regeneration process. As a result, the regenerated cathode delivers a reversible capacity of 160 mAh g(-1) at 0.5 C with retention of 93.7% after 100 cycles and maintains a high capacity of 132 mAh g(-1) at a high rate of 5 C. The electrochemical performance of regenerated NCM cathode is compared favorably to the fresh NCM cathode, which demonstrates the feasibility of the molten salt approach to directly regenerate spent NCM cathode.
通讯机构：
[Hong-Guang Jin; Zi-Sheng Chao] S;School of Materials Science and Engineering, Changsha University of Science & Technology, Changsha, 410114, China
摘要：
Cerium(IV)-based metal-organic frameworks (MOFs) have gained a growing attention in both scientific and industrial spheres due to their unique potential in fields such as redox catalysis and photocatalysis. However, the synthetic pathways of Ce(IV)-MOFs are still extremely dominated by the conventional solvothermal conditions. Meanwhile, the research on photocatalysis of Ce(IV)-MOFs is still in its infancy, more experimental evidence is highly desirable to accelerate the development of this field. Here we present an innovative, widespread, green and sustainable synthetic route for nanocrystalline Ce(IV)-MOFs with the UiO-66 structure. Seven Ce-UiO-66-MOFs were successfully prepared at room temperature using water as the sole solvent in the presence of sodium acetate (NaAc). Furthermore, the photocatalytic activities of these Ce(IV)-MOFs for decarboxylative oxygenation of 4-fluorophenylacetic acid to give corresponding C-O bond-forming products 4-fluorobenzaldehyde and 4-fluorobenzyl alcohol under blue light-emitting diodes (LEDs) irradiation and air were studied. Control experiments revealed that Ce-UiO-66-BDC exhibited the optimized catalytic efficiency among these Ce (IV)-MOFs, and can be applied to various arylacetic acids.
作者机构：
[Wang, Xin; Jia, Nanjun; Zhao, Xinsheng; Liu, Pengbo; Li, Jianwei; Lin, Yuxiao] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China.;[Sun, Changqing] Dongguan Univ Technol, Res Inst Interdisciplinary Sci, Dongguan 523820, Peoples R China.;[Sun, Changqing] Dongguan Univ Technol, Sch Mat Sci & Engn, Dongguan 523820, Peoples R China.;[Qin, Wei] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Jianwei Li; Wei Qin] A;Authors to whom correspondence should be addressed.<&wdkj&>School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410114, China
摘要：
Antimony (Sb) is considered a promising anode for Li-ion batteries (LIBs) because of its high theoretical specific capacity and safe Li-ion insertion potential; however, the LIBs suffer from dramatic volume variation. The volume expansion results in unstable electrode/electrolyte interphase and active material exfoliation during lithiation and delithiation processes. Designing flexible free-standing electrodes can effectively inhibit the exfoliation of the electrode materials from the current collector. However, the generally adopted methods for preparing flexible free-standing electrodes are complex and high cost. To address these issues, we report the synthesis of a unique Sb nanoparticle@N-doped porous carbon fiber structure as a free-standing electrode via an electrospinning method and surface passivation. Such a hierarchical structure possesses a robust framework with rich voids and a stable solid electrolyte interphase (SEI) film, which can well accommodate the mechanical strain and avoid electrode cracks and pulverization during lithiation/delithiation processes. When evaluated as an anode for LIBs, the as-prepared nanoarchitectures exhibited a high initial reversible capacity (675 mAh g(-1)) and good cyclability (480 mAh g(-1) after 300 cycles at a current density of 400 mA g(-1)), along with a superior rate capability (420 mA h g(-1) at 1 A g(-1)). This work could offer a simple, effective, and efficient approach to improve flexible and free-standing alloy-based anode materials for high performance Li-ion batteries.
通讯机构：
[Jincheng Fan; Zisheng Chao] C;College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, China
关键词：
MnCoP/(CoMn)(Co,Mn)(2)O-4 nanocomposites;Phosphating treatment;All-solid-state asymmetric supercapacitors;Connection in series or parallels
摘要：
MnCoP/(Co,Mn)(Co,Mn)(2)O-4 nanocomposites were prepared by hydrothermal + annealing + phosphating treatment method and their electrochemical properties were investigated, systematically. Aqueous MnCoP/ (Co,Mn)(Co,Mn)(2)O-4//active carbon asymmetric supercapacitor demonstrate the capacitance of 74.14 F/g at 0.1 A/g and good rate performance and cycling stability(maintained 85.75 % of the initial capacitance after 10,000 GCD cycles at a current density of 0.5A/g). Furthermore, all-solid-state asymmetric supercapacitors assembled by MnCoP/(Co,Mn)(Co,Mn)(2)O-4 nanocomposites exhibit the capacitance of 123.43 F/g at a current density of 0.5 A/g, an energy density of 132.3 Wh/kg at a power density of 503.4 W/kg, good rate performance and cycling stability. Especially, the all-solid-state supercapacitors connected in series present excellent voltage extendtion capability and the ones assembled in parallel demonstrate outstanding capacitance retention capability, highlighting the promising practical applications of MnCoP/(Co,Mn)(Co,Mn)(2)O(4 )nanocomposites to meet various output requirements in electrochemical enenrgy storage.
摘要：
Dense Si3N4 ceramics were prepared by fused deposition molding method accompanied by gas pressure sintering. In this study, the surface steps, inter layer bonding and microstructure evolution were characterized and dense Si3N4 ceramics without obvious defects were obtained. It was verified that layer thickness and nozzle diameter have little impact on the density and flexural strength of both green and sintered parts. As to the filling strategy, contour offset path was more effective to obtain sintered part with higher flexural strength than parallel lines and grid path, which was due to the possible voids appeared at the intersection of print paths with different di-rections. The highest flexure strength 824.74 +/- 85 MPa was obtained with layer thickness 0.15 mm, nozzle size 0.6 mm and contour offset path. The reliability of the obtained Si3N4 ceramics was also investigated and complex shaped Si3N4 ceramic parts with good shape keeping was prepared successfully.
期刊：
International Journal of Materials Research,2022年113(7):671-681 ISSN：1862-5282
通讯作者：
Ma, J.
作者机构：
Chengdu University, 2025 Chengluo Road, Sichuan, Chengdu, 610106, China;Institute Of Metals, College Of Materials Science And Engineering, Changsha University Of Science & Technology, Changsha, China;Institute Of Metal Research, Chinese Academy Of Sciences, Shenyang, China
通讯机构：
Chengdu University, 2025 Chengluo Road, Sichuan, Chengdu, China
摘要：
The highly active electrodes for the oxygen evolution reaction (OER) are vital for boosting the overall efficiency of electrocatalytic water splitting to produce hydrogen fuel. Here we demonstrate a facile in-situ sulfurization strategy to construct an additive-free electrode with low-crystalline Co9S8-Ni3S2 nanohybrid under the joint effects of fast sulfurization and lattice-mismatched growth. The Co9S8-Ni3S2 nanohybrid exhibits semi-spherical architecture constructed with interconnected nanoflakes, and contains mesopores with an average pore size of 12.66 nm. The crystalline degrees of Ni3S2 and Co9S8 in the nanohybrid are estimated to be as low as 18.66% and 5.46%, respectively. For OER in 1 M KOH, the electrode attains a benchmark of 10 mA cm(-2) at a very low overpotential (eta(10)) of 220 mV and impressively demonstrates the outstanding OER stability lasting for 900 h at about 50 mA cm(-2), which highlights its great potential applications in water splitting devices. More importantly, this work discloses the crucial contribution from low-crystalline Co9S8-Ni3S2 nanohybrid to the high-efficiency OER, the key role of dynamic balance related to electroctatalytic activity in sustaining the ultralong-term stability, and the mechanisms behind the matter evolutions from Co9S8-Ni3S2 into CoOOH-NiOOH species. (C) 2021 Elsevier Ltd. All rights reserved.
通讯机构：
[Wenbin Luo] C;College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, Hunan 410114, People’s Republic of China
