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Coupling effect between the structure and surface characteristics of electrospun carbon nanofibres on the electrochemical activity towards the VO2+/VO2+ redox couple
Wei, Guanjie; Gao, Zhenguo; Wei, Zengfu; Fan, Xinzhuang; Liu, Jianguo; Yan, Chuanwei; xzfan@imr.ac.cn; jgliu@imr.ac.cn
2015
Source PublicationPHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
Volume17Issue:31Pages:20368-20375
AbstractIn order to investigate the structure-function relationship of electrospun carbon nanofibres (ECNFs), polyacrylonitrile (PAN)-based electrospun carbon webs (ECWs) have been developed, consisting of ECNFs carbonized over the temperature range of 1000-1500 degrees C in a nitrogen atmosphere. The surface morphology, microstructure, composition, electrical conductivity and hydrophilicity of the ECNFs have been characterized. The electrochemical activity of the ECNFs towards the VO2+/VO2+ redox reaction has been measured by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It is worth noting that the electrochemical performance of the ECNFs decreases firstly and then rises gradually with the increase in carbonization temperature, and a carbonization temperature of about 1300 degrees C is the turning point. This unusual phenomenon might be attributed to the coupling effect between the surface and structure characteristics of the ECNFs towards the VO2+/VO2+ redox couple. The surface composition plays a leading role in the electrochemical activity of ECNFs carbonized over the temperature range of 1000-1300 degrees C; however, the edge planes of graphite crystallites which form during the high temperature range from 1300-1500 degrees C then become the dominant factor. Therefore, the electrochemical activity decreases with the reduction of functional groups on the surface from carbonization at 1000-1300 degrees C, and then increases with the addition of the edge planes of graphite crystallites from carbonization at 1300-1500 degrees C.
description.department[wei, guanjie ; fan, xinzhuang ; liu, jianguo ; yan, chuanwei] chinese acad sci, liaoning engn res ctr adv battery mat, inst met res, shenyang 110016, peoples r china ; [gao, zhenguo] shenyang inst engn, shenyang 110136, peoples r china ; [wei, zengfu] elect power res inst guangdong power grid co ltd, guangzhou 510080, guangdong, peoples r china
Funding OrganizationNational Basic Research Program of China [2010CB227203]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74697
Collection中国科学院金属研究所
Corresponding Authorxzfan@imr.ac.cn; jgliu@imr.ac.cn
Recommended Citation
GB/T 7714
Wei, Guanjie,Gao, Zhenguo,Wei, Zengfu,et al. Coupling effect between the structure and surface characteristics of electrospun carbon nanofibres on the electrochemical activity towards the VO2+/VO2+ redox couple[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2015,17(31):20368-20375.
APA Wei, Guanjie.,Gao, Zhenguo.,Wei, Zengfu.,Fan, Xinzhuang.,Liu, Jianguo.,...&jgliu@imr.ac.cn.(2015).Coupling effect between the structure and surface characteristics of electrospun carbon nanofibres on the electrochemical activity towards the VO2+/VO2+ redox couple.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,17(31),20368-20375.
MLA Wei, Guanjie,et al."Coupling effect between the structure and surface characteristics of electrospun carbon nanofibres on the electrochemical activity towards the VO2+/VO2+ redox couple".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17.31(2015):20368-20375.
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