A high-performance battery-like supercapacitor electrode with a continuous NiTe network skeleton running throughout Co(OH)2/Co9S8 nanohybrid
作者：
Wu, Baoxin;Zhang, Feifei;Nie, Zhongwu;Qian, Hao;Liu, Peng;...
期刊：
Electrochimica Acta ,2021年365:137325 ISSN：0013-4686
通讯作者：
Chen, Shuguang
作者机构：
[He, Hao; Nie, Zhongwu; Qian, Hao; Chen, Zhaoyong; Liu, Peng; Wu, Baoxin; Chen, Shuguang] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Zhang, Feifei] Natl Univ Singapore, Dept Mat Sci & Engn, Fac Engn, Singapore 117576, Singapore.;[Wu, Jianghong] Shenzhen Technol Univ, Coll Hlth Sci & Environm Engn, Shenzhen 518118, Guangdong, Peoples R China.
通讯机构：
[Chen, Shuguang] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
Co(OH)(2);Co9S8;NiTe;Supercapacitor;Battery-like
摘要：
There has been an ongoing effort in pursuing high-energy-density supercapacitor to facilitate its practical applications in energy storage devices. Currently, constructing a composite electrode using multiple battery-type materials or battery-like capacitive materials has been perceived as a promising solution. On one hand, the rational composition/microstructure design is highly desirable to improve the volumetric stress distribution and enhance the overall electrical conductivity. Accordingly, we develop a battery-like (Co(OH)(2)/Co9S8)@NiTe/Ni composite electrode, in which the continuous NiTe network skeleton running throughout Co(OH)(2)/Co9S8 nanohybrid acts as the fast electron transfer channel and the buffer against volumetric strain. The electrode delivers a high areal capacitance of 5.28 F cm(-2) at a current density of 10 mA cm(-2) and demonstrates a super-long cycle life of 50,0 0 0 cycles due to the good electrical conductivity, buffer effect of NiTe skeleton and the capacitance contributions from multiple constituents. Thereafter, the assembled aqueous or quasi-solid-state (Co(OH)(2)/Co9S8)@NiTe/Ni//AC asymmetric supercapacitor demonstrates high areal energy density exceeding 0.88 mWh cm(-2) as well as long cycle life exceeding 35,000 cycles. The fabricated battery-like supercapacitor electrode can be engineered to satisfy the long-term, high-power and high-energy-density application requirements. (c) 2020 Elsevier Ltd. All rights reserved.
语种：
英文
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Study on modification mechanism of nano-ZnO/polymerised styrene butadiene composite-modified asphalt using density functional theory
作者：
Zeng Qing;Liu Qi-Cheng* ;Liu Peng;Chen Chuan-Sheng;Kong Jiang-Rong
期刊：
Road Materials and Pavement Design ,2020年21(5):1426-1438 ISSN：1468-0629
通讯作者：
Liu Qi-Cheng
作者机构：
[Liu Peng; Zeng Qing; Chen Chuan-Sheng; Liu Qi-Cheng] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha, Peoples R China.;[Kong Jiang-Rong] Cent South Univ, Coll Chem & Chem Engn, Changsha, Peoples R China.
通讯机构：
[Liu Qi-Cheng] S;School of Materials Science and Engineering, Changsha University of Science & Technology, Changsha, People’s Republic of China
关键词：
nano-ZnO;polymerised styrene butadiene;modified asphalt;modification mechanism;density functional theory
摘要：
The modification mechanism between nano-zinc oxide (nano-ZnO), polymerised styrene butadiene (PSB) and asphalt were studied by first-principles calculation, revealed the modification mechanism from the molecular scale. The asphalt was divided into four components: saturate, aromatic, resin and asphaltene, used nano-ZnO and PSB as modifiers for asphalt, constructed systems of asphalt modifiers and asphalt components, then geometric optimisation of each system. Density functional theory (DFT) was used to calculate the binding energy and the number of charges transferred between saturate, aromatic, resin and nano-ZnO, PSB. Calculated results show that nano-ZnO has chemical modification of hydroxylation to asphalt. Meanwhile, the nano-ZnO has a physical adsorption effect based on van der Waals force for each component of asphalt, which can be stably combined with asphalt. PSB can form aromatic-ring stacking with asphalt, making PSB combined with asphalt, the interaction of this accumulation is not strong, and the combination of PSB and asphalt is unstable. When nano-ZnO and PSB were simultaneously added into the asphalt, the absolute value of the binding energy between saturate, aromatic, resin and PSB all increased, nano-ZnO acts as a medium for attracting asphalt and PSB, the addition of nano-ZnO can effectively enhance the binding stability of PSB and asphalt.
语种：
英文
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Ni_3S_2 nanorods growing directly on Ni foam for all-solid-state asymmetric supercapacitor and efficient overall water splitting
作者：
Wu, Baoxin;Qian, Hao;Nie, Zhongwu;Luo, Zhongping;Wu, Zixu;...
期刊：
能源化学(英文) ,2020年46(07):178-186 ISSN：2095-4956
通讯作者：
Chen, Shuguang;Zhang, Feifei
作者机构：
[He, Hao; Qian, Hao; Nie, Zhongwu; Liu, Peng; Wu, Zixu; Wu, Baoxin; Luo, Zhongping; Chen, Shuguang] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Wu, Jianghong] Shenzhen Technol Univ, Coll Hlth Sci & Environm Engn, Shenzhen 518118, Guangdong, Peoples R China.;[Zhang, Feifei] Natl Univ Singapore, Fac Engn, Dept Mat Sci & Engn, Singapore 117576, Singapore.
通讯机构：
[Chen, Shuguang] C;[Zhang, Feifei] N;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;Natl Univ Singapore, Fac Engn, Dept Mat Sci & Engn, Singapore 117576, Singapore.
关键词：
Additives;Catalysts;Electrocatalysis;Electrodes;Hydrogen evolution reaction;Nanorods;Nickel;Oxygen evolution reaction;Potassium hydroxide;Precious metal compounds;Precious metals;Refractory metal compounds;Solid electrolytes;Supercapacitor;All-solid state;Asymmetric supercapacitor;Capacitance retention;Cycling stability;Multifunctional additives;Ni3S2;Non-noble metal catalysts;Water splitting;Nickel compounds
摘要：
Transition metal compounds are attractive for their significant applications in supercapacitors and as non-noble metal catalysts for electrochemical water splitting. Herein, we develop Ni3S2 nanorods growing directly on Ni foam, which act as multifunctional additive-free Ni3S2@Ni electrode for supercapacitor and overall water splitting. Based on PVA-KOH gel electrolyte, the assembled all-solid-state Ni3S2@Ni//AC asymmetric supercapacitor delivers a high areal energy density of 0.52 mWh cm−2 at an areal power density of 9.02 mW cm−2, and exhibits an excellent cycling stability with a capacitance retention ratio of 89% after 10000 GCD cycles at a current density of 30 mA cm−2. For hydrogen evolution reaction and oxygen evolution reaction in 1 M KOH, Ni3S2@Ni electrode achieves a benchmark of 10 mA cm−2 at overpotentials of 82 mV and 310 mV, respectively. Furthermore, the assembled Ni3S2@Ni||Ni3S2@Ni electrolyzer for overall water splitting attains a current density of 10 mA cm−2 at 1.61 V. The in-situ synthesis of Ni3S2@Ni electrode enriches the applications of additive-free transition metal compounds in high-performance energy storage devices and efficient electrocatalysis. © 2019
语种：
英文
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Preparation and modification mechanism analysis of graphene oxide modified asphalts
作者：
Zeng, Qing;Liu, Yaru;Liu, Qicheng* ;Liu, Peng;He, Yuhao;...
期刊：
Construction and Building Materials ,2020年238:117706 ISSN：0950-0618
通讯作者：
Liu, Qicheng
作者机构：
[Liu, Qicheng; Zeng, Qing] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410114, Peoples R China.;[Liu, Yaru] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Liu, Peng; He, Yuhao; Zeng, Yuqin] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China.
通讯机构：
[Liu, Qicheng] C;Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Changsha 410114, Peoples R China.
关键词：
Density functional theory;Graphene oxide;Modification mechanism;Modified asphalt
摘要：
Preparation of graphene oxide (GO) by oxidative dispersion, using GO as an asphalt modifier, graphene oxide modified asphalt was prepared by high temperature melting method. The effect of GO incorporation on the basic physical properties of asphalt was investigated, and the X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIR) were used to analyze the microstructure characteristic of GO and modified asphalt. In order to reveal the bonding mechanism between GO and asphalt, a calculation model of asphalt molecules and GO molecules was constructed. Each of constructed asphalt molecules and GO molecules were placed in the primitive cells to obtain systems of asphalt with GO. Density functional theory (DFT) was used to calculate the molecular charge density, the electron density difference, the binding energy and the number of charges transferred between asphalt and GO. The results shown that the GO improved high temperature stability and heat aging resistance of the asphalt, but unable improve the crack resistance of the asphalt. GO was stably dispersed in asphalt, GO modified asphalt by forming an intercalation structure, which improves the high temperature stability of the asphalt. However, the effect of GO on asphalt was based on the physical modification, which unable crosslink each other in the asphalt, as a result, the crack resistance of the modified asphalt unable be improved. Density functional calculation results show that the bonding of resin with GO was the most stable, followed by those for aromatic with GO, and those for saturate with GO was the weakest, GO can hinder the movement of saturate and inhibit the volatilization of saturate, thereby improving the high temperature stability and heat aging resistance of asphalt. GO molecules can form hydrogen bonds with asphalt molecules, and it can also form aromatic ring stacks with aromatic and resin molecules, these non-bond interactions were the key to the stable dispersion of GO in asphalt. © 2019 Elsevier Ltd
语种：
英文
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Silica-free Synthesis of Mesoporous Co3O4/CoOxPy as a Highly Active Oxygen Evolution Reaction Catalyst
作者：
Sun, Tian;Liu, Piao;Yang, Daihui;Wang, Qiyou;Duan, Junfei
（ ;...
期刊：
ChemNanoMat ,2019年5(11):1390-1397 ISSN：2199-692X
通讯作者：
Gao, Yang;Zhang, Shiguo
作者机构：
[Wang, Qiyou; Sun, Tian; Ma, Chao; Gao, Yang; Yang, Daihui; Zhang, Shiguo] Hunan Univ, Hunan Prov Key Lab Adv Carbon Mat & Appl Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Liu, Piao] Hunan LEED Elect Ink Co Ltd, Zhuzhou 412007, Peoples R China.;[Duan, Junfei] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Gao, Y; Zhang, SG] H;Hunan Univ, Hunan Prov Key Lab Adv Carbon Mat & Appl Technol, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
oxygen evolution reaction;carbon template;mesoporous Co3O4;cobalt phosphide;heterogeneous catalyst
摘要：
Highly active and stable catalysts towards electrochemical oxygen evolution reaction are crucial for the efficient water splitting and sustainable hydrogen generation. Here we report a novel mesoporous Co3O4 with the surface decoration of mixed CoOxPy species towards efficient OER catalysis. The material is synthesized from a simple carbon template derived from p-phenylenediamine bisulfate followed by low temperature phosphorization. Unlike traditional methods, silica intermediates are not involved during synthesis, improving the overall safety and efficiency. The as-prepared mesoporous Co3O4/CoOxPy catalyst shows excellent catalytic activity and stability towards oxygen evolution reaction in 1 M KOH. The overpotential is 295 mV at 10 mA cm−2, superior to that of commercial IrO2/C catalyst. A small Tafel slope of 70 mV dec−1 and high stability are also observed. The excellent electrochemical performance is attributed to the mesoporous structure, strong electronic interaction, and synergistic effect of the mesoporous Co3O4 and CoOxPy phases. Other heterogeneous catalysts with similar structures and compositions may also be fabricated following the same design principle. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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助推创新能力培养的材料类选修课改革实践
作者：
刘鹏;叶昌;陈曙光;杨现锋;李海斌
期刊：
教育现代化 ,2019年(49):42-44 ISSN：2095-8420
作者机构：
长沙理工大学材料科学与工程学院
关键词：
新工科;材料类选修课;创新能力培养;研讨式教学;科教融合
摘要：
培养创新型卓越工程人才是发展新工科的重要任务之一。本研究面向战略性新兴产业推行材料类选修课的教学改革,以在线开放课程建设引领"翻转课堂"的教学模式,以问题解决为导向实施研讨式教学改革,构建了关注学习过程的成绩评价体系,形成了"课堂教学"与"课外科技创新"相互促进的联动机制,凸显了以产业、学科和科研的发展成果反哺教学的科教融合特色,在学生的知识更新、思维拓展、工程训练和实践创新等方面取得了显著成效。
语种：
中文
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An asymmetric supercapacitor using sandwich-like NiS/NiTe/Ni positive electrode exhibits a super-long cycle life exceeding 200 000 cycles
作者：
Chen, Shuguang* ;Wu, Baoxin;Qian, Hao;Wu, Zixu;Liu, Peng;...
期刊：
Journal of Power Sources ,2019年438:227000 ISSN：0378-7753
通讯作者：
Chen, Shuguang;Liu, Bo
作者机构：
[He, Hao; Qian, Hao; Li, Fujin; Liu, Peng; Wu, Zixu; Wu, Baoxin; Chen, Shuguang] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Wu, Jianghong] Shenzhen Technol Univ, Coll Hlth Sci & Environm Engn, Shenzhen 518118, Guangdong, Peoples R China.;[Liu, Bo] Michigan Technol Univ, Dept Biomed Engn, Houghton, MI 49931 USA.
通讯机构：
[Chen, Shuguang] C;[Liu, Bo] M;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;Michigan Technol Univ, Dept Biomed Engn, Houghton, MI 49931 USA.
关键词：
Buffer layers;Durability;Electrodes;Nickel;Nickel sulfates;Supercapacitor;Tellurium compounds;Asymmetric supercapacitor;Cyclic stability;High energy densities;NiTe;Pseudo-capacitive materials;Structural synergy;Volumetric expansion;Volumetric shrinkage;Sulfur compounds
摘要：
Supercapacitor with high energy density and super-long cyclic durability is attractive for the rechargeable energy storage devices. The combination of multiple pseudo-capacitive materials is favorable for improving the energy density of supercapacitor, but the rationally designed electrode structures are highly desirable for achieving the super-long cyclic durability. Here we realize a novel hierarchical NiS/NiTe/Ni positive electrode for supercapacitor, and the assembled asymmetric supercapacitor using the positive electrode demonstrates a super-long cycle life exceeding 200 000 cycles. In the positive electrode, a porous NiTe inner layer acts as the volumetric stain buffer layer between a rigid Ni substrate and a spongy NiS outer layer. In particular, the initiation of volumetric expansion from NiTe inner layer to NiS outer layer, along with the proceeding of volumetric shrinkage from the outer to the inner layer occurring in sequence on the positive electrode play crucial roles in the super-long cycle life, for which sheds a new light on the design/synthesis of multiple pseudo-capacitive materials to achieve the outstanding cyclic stability of supercapacitors. © 2019 Elsevier B.V.
语种：
英文
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Prolonging the Cycle Life of a Lithium-Air Battery by Alleviating Electrolyte Degradation with a Ceramic-Carbon Composite Cathode.
作者：
Luo, Zhifu;Li, Yanyan;Liu, Zixuan* ;Pan, Linhai;Guan, Wanbing;...
期刊：
ChemSusChem ,2019年12(22):4962-4967 ISSN：1864-5631
通讯作者：
Liu, Zixuan;Wang, Deyu;Liu, Peng
作者机构：
[Guan, Wanbing; Li, Yanyan; Luo, Zhifu; Pan, Linhai; Wang, Deyu; Liu, Zixuan; Wang, DY] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Dept New Energy Technol, Ningbo 315201, Zhejiang, Peoples R China.;[Luo, Zhifu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Liu, Peng] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Liu, ZX; Wang, DY; Liu, Peng] C;Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Dept New Energy Technol, Ningbo 315201, Zhejiang, Peoples R China.;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
carbon;ceramics;electrochemistry;lithium;surface analysis
摘要：
Carbon materials with a high specific surface area are usually preferred to construct the air cathode of lithium–air batteries due to their abundant sites for oxygen reduction and discharge product growth. However, the high surface area also amplifies electrolyte degradation during charging, which would become the threshold of cyclability after addressing the issue of electrode passivation and pore clogging, but is usually overlooked in relevant research. Herein, it is proven that the critical influence of cathode surface area on electrolyte consumption by adopting carbon–ceramic composites to reduce the surface area of the air cathode. After screening several potential ceramic materials, an optimal composite of Ketjenblack (KB) and La0.7Sr0.3MnO3 (LSM) delivered a discharge capacity that was even higher than that of pure KB. This composite effectively mitigated the parasitic reaction current by 45 % if polarized at 4.4 V versus Li+/Li. Correspondingly, this composite prolonged the cycle life of the cell by 156 %. The results demonstrate that electrolyte consumption during charging is one of the critical boundary conditions to restrain the cyclic stability of lithium–air batteries. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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基于新工科教育背景的无机材料专业课程设计教学改革与探索
作者：
叶昌;夏清;刘鹏;成茵;杨现锋
期刊：
教育现代化 ,2019年(42):35-37 ISSN：2095-8420
作者机构：
长沙理工大学材料科学与工程学院
关键词：
课程设计;新工科;教学改革
摘要：
课程设计是高等学校实践教学环节的重要组成部分,本文结合新工科教育特征,分析了目前课程设计存在的问题,对工科类无机非金属工程专业的无机材料专业课程设计提出了从产业需求、课程设置、选题内容、过程管理、教师指导等方面进行教学改革与探索,提高教学质量,适应新工科教育的要求。
语种：
中文
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新工科建设背景下材料类专业选修课的教学改革思考
作者：
刘鹏;杨现锋;叶昌;李海斌;陈曙光
期刊：
教育教学论坛 ,2019年(14):145-146 ISSN：1674-9324
作者机构：
长沙理工大学 材料科学与工程学院,长沙,410114;[陈曙光; 杨现锋; 李海斌; 刘鹏; 叶昌] 长沙理工大学
关键词：
新工科;材料类专业;专业选修课;教学改革
摘要：
新工科建设对于提升我国高等院校人才培养质量具有重要意义。本文针对材料类专业高年级本科生的学习特点,深入分析了专业选修课教学在新工科背景下面临的主要挑战。在课堂教学实践中,以培养学生的创新思维与工程实践能力为目标,提出教学设计中的关键问题与教学方法的实施技巧,调动信息化手段激发学生的学习积极性,增设实践环节培养学生的工程思维,提高学生利用专业选修课知识解决实际工程问题的能力。
语种：
中文
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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
语种：
英文
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Ba0.5 Sr0.5 Co0.8 Fe0.2 O3-δ -based dual-gradient cathodes for solid oxide fuel cells
作者：
Liu, Peng* ;Luo, Zhifu;Kong, Jiangrong* ;Yang, Xianfeng;Liu, Qicheng;...
期刊：
Ceramics International ,2018年44(4):4516-4519 ISSN：0272-8842
通讯作者：
Liu, Peng;Kong, Jiangrong
作者机构：
[Xu, He; Liu, Qicheng; Liu, Peng; Luo, Zhifu; Yang, Xianfeng] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Liu, Peng; Kong, Jiangrong] Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Kong, Jiangrong] Cent South Univ, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Liu, P; Kong, JR; Kong, Jiangrong] C;Cent South Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;Cent South Univ, Hunan Prov Key Lab Efficient & Clean Utilizat Man, Changsha 410083, Hunan, Peoples R China.
关键词：
Fuel cells;Electrodes;Perovskites;Porosity
摘要：
Ba<inf>0.5</inf>Sr<inf>0.5</inf>Co<inf>0.8</inf>Fe<inf>0.2</inf>O<inf>3-δ</inf>(BSCF)/Gd<inf>0.2</inf>Ce<inf>0.8</inf>O<inf>1.9</inf>(GDC) dual-gradient cathodes for solid oxide fuel cells (SOFCs) were prepared via a spraying-sintering route, using corn starch as a pore-forming agent. The X-ray diffraction (XRD) analysis results revealed that the BSCF and GDC showed good chemical compatibility even at 1200 °C. The scanning electron microscopy (SEM) results indicated that a graded pore structure, in addition to a gradient composition, can be obtained by regulating the dosage of the pore-forming agent. Consequently, the dual-gradient cathode possessed a low polarization resistance of 0.25 Ωcm<sup>2</sup>at 750 °C, when the pore-forming agent contents were graded at 5 wt%, 10 wt%, and 15 wt% from the inner sub-layer to the outer sub-layer, respectively. This comparative study indicated that high levels of porosity are beneficial for oxygen transport;however, the variation in the porosity of the adjoining sub-layers should be tailored to guarantee the provision of continuous conductive paths for charge carriers.<br/> ©2017 Elsevier Ltd and Techna Group S.r.l.
语种：
英文
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3D meso/macroporous Ni3S2@Ni composite electrode for high-performance supercapacitor
作者：
Chen, Shuguang* ;Li, Yuhan;Wu, Baoxin;Wu, Zixu;Li, Fujin;...
期刊：
Electrochimica Acta ,2018年275:40-49 ISSN：0013-4686
通讯作者：
Chen, Shuguang
作者机构：
[Li, Fujin; Li, Haibin; Liu, Peng; Wu, Zixu; Wu, Baoxin; Li, Yuhan; Chen, Shuguang; Wu, Jianghong] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Chen, Shuguang] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
Ni3S2;Sulfuration;Supercapacitor;Formation mechanism
摘要：
Ni3S2@Ni composite electrode for supercapacitor is synthesized via a one-step solvothermal treatment of Ni foam at 120 degrees C, exhibiting a 3D meso/macroporous network structure. The structure contains Ni3S2 nanosheets with 15-20 nm in thickness and meso/macropores with an average pore size of 24.69 nm, and its formation is regulated through the slow release of S2- ions and the solid/liquid interfacial reactions in absolute ethanol. At a current density of 17.15 A g(-1), the composite electrode demonstrates a high specific capacitance of 945.71 F g(-1), and at various current densities below 17.15 A g(-1), it retains capacitance retention ratios above 100% after 2000 charge/discharge cycles. A two-step oxidation and three-step reverse reduction process occurs during the reversible Faradaic reaction of Ni3S2 in KOH aqueous solution, which is due to the valence transitions of Ni-0 in Ni3S2 between Ni-0 and Ni3+. The homogeneous cracking in Ni3S2 layer is a critical factor for achieving its long-term cycling stability, however, the cycling results in its amorphization. An asymmetric supercapacitor is assembled using Ni3S2@Ni composite electrode as the positive electrode and Ni foam as the negative electrode, which delivers an energy density of 55.79 Wh kg(-1) at the power density of 938.98 W kg(-1). (c) 2018 Elsevier Ltd. All rights reserved.
语种：
英文
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Preparation and electrochemical properties of Ba0.8 La0.2 FeO3-δ cathode for intermediate-temperature solid oxide fuel cells
作者：
Liu, Peng* ;Zhu, Hongze;Kong, Jiangrong;Wei, Ning;Wang, Can;...
期刊：
Journal of Sol-Gel Science and Technology ,2017年82(1):233-238 ISSN：0928-0707
通讯作者：
Liu, Peng
作者机构：
[Wei, Ning; Wang, Can; Liu, Qicheng; Liu, Peng; Yang, Xianfeng; Zhu, Hongze] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.;[Kong, Jiangrong] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Liu, Peng] C;Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
Amino acids;Barium compounds;Catalyst activity;Cathodes;Electrochemical corrosion;Electrochemical properties;Electrodes;Electrolytes;Electrolytic reduction;Fuel cells;Gas fuel purification;Iron oxides;Lanthanum oxides;Nitrates;Phase interfaces;Doped barium ferrite;Electrochemical measurements;Glycine nitrate process;Intermediate temperature solid oxide fuel cell;Oxygen reduction reaction;Polarization resistances;Samarium doped ceria electrolytes;Self-propagating combustion;Solid oxide fuel cells (SOFC)
摘要：
Abstract: Perovskite Ba0.8La0.2FeO3-δ was synthesized via a glycine–nitrate process as the cathode material for intermediate-temperature solid oxide fuel cells. Ultra-fine pure phase Ba0.8La0.2FeO3-δ powder was obtained after the self-propagating combustion of a complex xerogel precursor. The Ba0.8La0.2FeO3-δ cathode showed good compatibility and an enhanced phase interface with a samarium-doped ceria electrolyte. Electrochemical measurements showed that the Ba0.8La0.2FeO3-δ cathode achieved a low polarization resistance of 0.58 Ω cm2 at 800 °C in an air atmosphere. The porous nanostructure guaranteed the catalytic activity for the oxygen reduction reaction, even if the cathode material possessed a cobalt-free and low rare earth composition. Graphical abstract: [InlineMediaObject not available: see fulltext.] © 2016, Springer Science+Business Media New York.
语种：
英文
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Graphitic mesoporous carbon based on aromatic polycondensation as catalyst support for oxygen reduction reaction
作者：
Liu, Peng* ;Kong, Jiangrong;Liu, Yaru;Liu, Qicheng;Zhu, Hongze
期刊：
Journal of Power Sources ,2015年278:522-526 ISSN：0378-7753
通讯作者：
Liu, Peng
作者机构：
[Liu, Qicheng; Liu, Peng; Zhu, Hongze] Changsha Univ Sci & Technol, Dept Inorgan Nonmet Mat Engn, Changsha 410114, Hunan, Peoples R China.;[Kong, Jiangrong] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Liu, Yaru] Hunan Normal Univ, Key Lab Phytochem R&D Hunan Prov, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Liu, Peng] C;Changsha Univ Sci & Technol, Dept Inorgan Nonmet Mat Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
Aromatic compounds;Carbon black;Catalyst supports;Catalysts;Coal tar;Corrosion resistance;Electrocatalysts;Electrolytic reduction;Mesoporous materials;Oxygen;Polycondensation;Polymerization;Reduction;Carbon material;Electrochemical measurements;Graphitic mesoporous carbons;Mesoporous carbon;Mesoporous structures;Oxygen reduction reaction;Pt electrocatalysts;Spherical morphologies;Carbon
摘要：
Mesoporous carbon is constructed by monolithic polyaromatic mesophase deriving from the hexane insoluble of coal-tar pitch. This carbon material exhibits spherical morphology and layered crystallite, and thereby can be graphitized at 900 °C without destroying the mesoporous structure. Electrochemical measurements indicate that graphitic mesoporous carbon (GMC) support not only improves the activity of Pt electrocatalyst to oxygen reduction reaction (ORR), but also shows higher corrosion resistance than commercial XC-72 carbon black in the acid cathode environment. © 2014 Elsevier B.V.
语种：
英文
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Effects of quaternary ammonium salts on the storage stability of emulsified asphalt
作者：
刘其城;龚陶然;刘鹏;龙海
期刊：
湖南大学学报(自然科学版) ,2011年38(6):55-59 ISSN：1674-2974
通讯作者：
Liu, Q.-C.(liuqc1856@hotmail.com)
作者机构：
[刘其城; 龚陶然; 刘鹏; 龙海] Institute of Materials Science and Engineering, Changsha Univ. of Science and Technology, Changsha, Hunan 410114, China
通讯机构：
Institute of Materials Science and Engineering, Changsha Univ. of Science and Technology, China
关键词：
季胺盐;乳化剂;透层;乳化沥青;稳定性
摘要：
采用激光粒度仪、Zeta电位测试仪等对制备的季铵盐乳化沥青的粒度分布和Zeta电位情况进行测试,分析了季铵盐乳化剂对乳化沥青粒度分布和Zeta电位的影响机理,探讨了乳化剂用量和pH值对透层乳化沥青存储稳定性的影响.结果表明:当乳化剂质量分数为1.6%、乳液pH值为4时,透层乳化沥青的存储稳定性最好.
语种：
中文
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