Effects of various factors on capacitive properties of VOx•nH2O powders in aqueous electrolyte

被引:14
作者
Chen, Lian Mei [1 ,2 ]
Lai, Qiong Yu [1 ]
Zeng, Hong Mei [1 ]
Hao, Yan Jing [1 ]
Huang, Jian Hua [1 ]
机构
[1] Sichuan Univ, Coll Chem, Chengdu 610064, Peoples R China
[2] China W Normal Univ, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637000, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
VOx center dot nH(2)O; Capacitive properties; Drying temperature; pH; VANADIUM-OXIDE NANOTUBES; ELECTROCHEMICAL CAPACITORS; MANGANESE OXIDES; V2O5; XEROGEL; THIN-FILMS; SUPERCAPACITOR; BEHAVIOR; INTERCALATION; STORAGE; SURFACE;
D O I
10.1007/s10800-010-0238-z
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
In this work, effects of drying temperature, pH of aqueous electrolyte and current density on capacitive performance of VO (x) center dot nH(2)O material were firstly investigated. VO (x) center dot nH(2)O powders were prepared by a melt quenching method. The samples were characterized by X-ray diffraction analysis (XRD) and Fourier transform infrared (FTIR). The capacitive properties of VO (x) center dot nH(2)O samples were examined by cyclic voltammetry and galvanostatic charge/discharge test. VO (x) center dot nH(2)O sample which was obtained at the drying temperature of 80 A degrees C, delivers a maximum specific capacitance of 227.3 F g(-1) and exhibits excellent capacity retention in the potential range of -0.3 to 0.7 V at a current density of 200 mA g(-1) in NaNO3 solution with pH 2.
引用
收藏
页码:299 / 305
页数:7
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