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题名: Ultrathin free-standing electrospun carbon nanofibers web as the electrode of the vanadium flow batteries
作者: Xu, Chi1, 3;  Yang, Xiaofei1, 3;  Li, Xianfeng1, 2;  Liu, Tao1;  Zhang, Huamin1, 2
关键词: Vanadium flow battery ;  Electrode material ;  Carbon nanofiber ;  Electrospinning
刊名: JOURNAL OF ENERGY CHEMISTRY
发表日期: 2017-07-01
DOI: 10.1016/j.jechem.2017.03.005
卷: 26, 期:4, 页:730-737
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Energy & Fuels ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Engineering
英文摘要: Ultrathin free-standing electrospun carbon nanofiber web (ECNFW) used for the electrodes of the vanadium flow battery (VFB) has been fabricated by the electrospinning technique followed by the carbonization process in this study to reduce the ohmic polarization of the VFB. The microstructure, surface chemistry and electrochemical performance of ECNFW carbonized at various temperatures from 800 to 1400 degrees C have been investigated. The results show that ECNFW carbonized at 1100 degrees C exhibits the highest electrocatalytic activity toward the V2+/V3+ redox reaction, and its electrocatalytic activity decreases along with the increase of carbonization temperature due to the drooping of the surface functional groups. While for the VO2+/VO2+ redox couple, the electrocatalytic activity of ECNFW carbonized above 1100 degrees C barely changes as the carbonization temperature rises. It indicates that the surface functional groups could function as the reaction sites for the V2+/V3+ redox couple, but have not any catalytic effect for the VO2+/VO2+ redox couple. And the single cell test result suggests that ECNFW carbonized at 1100 degrees C is a promising material as the VFB electrode and the VFB with ECNFW electrodes obtains a super low internal resistance of 250 m Omega cm(2). (C) 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
关键词[WOS]: VO2+/VO2+ REDOX COUPLE ;  ANION-EXCHANGE MEMBRANES ;  ELECTROCHEMICAL ACTIVITY ;  GRAPHITE FELT ;  POSITIVE ELECTRODE ;  ENERGY-CONVERSION ;  PERFORMANCE ;  CATALYST ;  EVOLUTION ;  BISMUTH
语种: 英语
WOS记录号: WOS:000412776100020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150182
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, Liaoning, Peoples R China
2.Collaborat Innovat Ctr Chem Energy Mat iChEM, Dalian 116023, Liaoning, Peoples R China
3.Univ Chinese Acad Sci, Beijing 039, Peoples R China

Recommended Citation:
Xu, Chi,Yang, Xiaofei,Li, Xianfeng,et al. Ultrathin free-standing electrospun carbon nanofibers web as the electrode of the vanadium flow batteries[J]. JOURNAL OF ENERGY CHEMISTRY,2017,26(4):730-737.
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