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题名: Investigation on the effect of catalyst on the electrochemical performance of carbon felt and graphite felt for vanadium flow batteries
作者: Liu, Tao1;  Li, Xianfeng1;  Nie, Hongjiao1, 2;  Xu, Chi1, 2;  Zhang, Huamin1
关键词: Vanadium flow battery ;  Electrode ;  Carbon felt ;  Graphite felt ;  Catalyst
刊名: JOURNAL OF POWER SOURCES
发表日期: 2015-07-15
DOI: 10.1016/j.jpowsour.2015.03.148
卷: 286, 页:73-81
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: The role of catalysts in vanadium flow batteries (VFBs) has been studied by introducing bismuth (Bi) nanoparticles on carbon felt (CF) and graphite felt (GF). The electrocatalytic activity and VFBs performance of CF and GF before and after modification with Bi nanoparticles are investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and VFB single cell charge-discharge test. The results show that CF exhibits the much higher electrocatalytic activity than GF, due to its higher amount of C-OH and quaternary nitrogen groups and more defect sites. Bi nanoparticles can effectively improve the electrocatalytic activity of CF and GF, especially GF, towards V2+/V3+ redox couple in VFBs. As a result, energy efficiency of a VFB with GF, electrodes can be improved significantly by modification with Bi due to the dramatically reduced electrochemical polarization. However, the energy efficiency of a VFB with CF electrodes rarely changes after introduction of Bi nanoparticles, due to the fact that dominant limitation in a VFB with CF electrodes is ohmic polarization, and the reduced charge transfer resistance is not enough to improve the performance of this VFB remarkably. Therefore, CF is a more suitable electrode material for commercialized VFBs due to its higher electrocatalytic activity and lower cost. (C) 2015 Elsevier B.V. All rights reserved.
关键词[WOS]: ELECTRODE MATERIALS ;  ENERGY-STORAGE ;  CHEMICAL-MODIFICATION ;  POSITIVE ELECTRODE ;  REDOX ;  MEMBRANES ;  GRAPHENE ;  FIBER
语种: 英语
WOS记录号: WOS:000355027400008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146285
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Div Energy Storage, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Liu, Tao,Li, Xianfeng,Nie, Hongjiao,et al. Investigation on the effect of catalyst on the electrochemical performance of carbon felt and graphite felt for vanadium flow batteries[J]. JOURNAL OF POWER SOURCES,2015,286:73-81.
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