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Effect of the graphitization degree for electrospun carbon nanofibers on their electrochemical activity towards VO2+/VO2+ redox couple
Wei, Guanjie; Su, Wei; Wei, Zengfu; Jing, Minghua; Fan, Xinzhuang; Liu, Jianguo; Yan, Chuanwei; Fan, XZ; Liu, JG (reprint author), Chinese Acad Sci, Inst Met Res, Liaoning Engn Res Ctr Adv Battery Mat, Shenyang 110016, Peoples R China.
2016-05-01
发表期刊ELECTROCHIMICA ACTA
ISSN0013-4686
卷号199页码:147-153
摘要In order to investigate the effect of the conversion of carbon structure for electrospun carbon nanofibers (ECNFs) on their electrochemical activity toward vanadium redox couple, ECNFs with different graphitization degree are prepared through the catalytic graphitization process and their physicochemical properties have been characterized systemically. The results show that both of the iron catalyst and catalytic graphitization temperature contributes to improve the graphitization degree of the ECNFs greatly. With the increase of iron (III) acetylacetonate (AAI) mass ratio and catalytic graphitization temperature, the graphitization degree of ECNFs increases continuously, while its electrochemical activity increases at first and then decreases. Despite the XPS results show that the O and N content may not have a significant effect on the electrochemical activity of ECNFs, the heteroatoms at the edge-plane definitely are beneficial to the vanadium redox reactions. Based on these, it can be concluded that plenty of edge planes of graphite crystallites are generated during the conversion of carbon structure and more heteroatoms at the edge-plane may act as the active sites for VO2+/VO2+ redox reaction. It is to say, the carbon materials with an appropriate graphitization degree exhibit the best coupling effect of the conductivity and electrocatalytic activity, which have a big influence on the electrochemical activity of carbon materials. (C) 2016 Elsevier Ltd. All rights reserved.
部门归属[wei, guanjie ; jing, minghua ; fan, xinzhuang ; liu, jianguo ; yan, chuanwei] chinese acad sci, inst met res, liaoning engn res ctr adv battery mat, shenyang 110016, peoples r china ; [su, wei ; wei, zengfu] guangdong power grid co ltd, elect power res inst, guangzhou 510080, guangdong, peoples r china
关键词Degree Of Graphitization Electrospun Carbon Nanofibers Catalytic Graphitization Electrochemical Activity Vanadium Ions Redox Couples
学科领域Electrochemistry
资助者National Basic Research Program of China [2010CB227203]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75891
专题中国科学院金属研究所
通讯作者Fan, XZ; Liu, JG (reprint author), Chinese Acad Sci, Inst Met Res, Liaoning Engn Res Ctr Adv Battery Mat, Shenyang 110016, Peoples R China.
推荐引用方式
GB/T 7714
Wei, Guanjie,Su, Wei,Wei, Zengfu,et al. Effect of the graphitization degree for electrospun carbon nanofibers on their electrochemical activity towards VO2+/VO2+ redox couple[J]. ELECTROCHIMICA ACTA,2016,199:147-153.
APA Wei, Guanjie.,Su, Wei.,Wei, Zengfu.,Jing, Minghua.,Fan, Xinzhuang.,...&Liu, JG .(2016).Effect of the graphitization degree for electrospun carbon nanofibers on their electrochemical activity towards VO2+/VO2+ redox couple.ELECTROCHIMICA ACTA,199,147-153.
MLA Wei, Guanjie,et al."Effect of the graphitization degree for electrospun carbon nanofibers on their electrochemical activity towards VO2+/VO2+ redox couple".ELECTROCHIMICA ACTA 199(2016):147-153.
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