文献类型：期刊文献

英文题名：Synthesis of V2O5 center dot 1.6H(2)O/graphene composite and its application in supercapacitors

作者：Geng, Zhen-Duo[1];Wang, Yu-ping[2]

第一作者：Geng, Zhen-Duo

通讯作者：Geng, ZD[1]

机构：[1]Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Henan, Peoples R China;[2]Xinxiang Univ, Coll Phys, Xinxiang 453007, Peoples R China

第一机构：Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Henan, Peoples R China

通讯机构：[1]corresponding author), Henan Normal Univ, Coll Phys & Informat Engn, Xinxiang 453007, Henan, Peoples R China.

年份：2015

卷号：19

期号：10

起止页码：3131-3138

外文期刊名：JOURNAL OF SOLID STATE ELECTROCHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000362335900026)】；

语种：英文

外文关键词：Xerogel; Graphene; Nanobelts; Supercapacitors

摘要：V2O5 center dot nH(2)O/graphene composite is synthesized by self-assembly of V2O5 center dot 1.6H(2)O nanobelts on the surface of graphene via a simple hydrothermal method. The structure and morphologies of the composites are characterized by thermogravimetry analyzer, x-ray diffraction, and scanning electron microscope, respectively. It's found that the V2O5 center dot 1.6H(2)O nanobelts are in width of 90 nm and length of 1.5 mu m. The electrochemical behaviors of the composites in supercapacitors are tested by cyclic voltammetry and galvanostatic charge/discharge in a three-electrode system in KCl aqueous solution. Three pairs of redox peaks and voltage plateaus are observed correspondingly in the cyclic voltammetry curves and galvanostatic charge/discharge curves. The hybrid capacitance of this composite reaches 579 F/g at current density of 1 A/g and decreases 21 % after 5000 cycles at 4 A/g.