|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.
|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.|
; 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
Vanadium Ions Redox Couples
|资助者||National Basic Research Program of China [2010CB227203]
|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.|
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.
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.
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.