CoWO4 nanoparticles prepared by two methods displaying different structures and supercapacitive performances

被引：127

作者：

Xing, Xuteng ^{[1
]}

Gui, Yongliang ^{[1
]}

Zhang, Guijie ^{[1
]}

Song, Chunyan ^{[1
]}

机构：

[1] Hebei United Univ, Coll Met & Energy, Tangshan 063009, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2015年 / 157卷

基金：

中国国家自然科学基金;

关键词：

wet-chemical; hydrothermal; cobalt tungstate; supercapacitors; ELECTROCHEMICAL PROPERTIES; ELECTRODE MATERIAL; FACILE SYNTHESIS; OXIDE; CARBON; ZNWO4; MNO2; COMPOSITES; POWDER;

D O I：

10.1016/j.electacta.2015.01.055

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The simple wet-chemical and hydrothermal approaches were used to prepare amorphous CoWO4-amorphous and crystal CoWO4-crystalline nanoparticles for the electrode materials in supercapacitors. The CoWO4 nanoparticles were characterized and their capacitances were investigated by a three-electrode system. The results showed that specific capacitances for the as-prepared CoWO4-amorphous and CoWO4-crystalline were 403 F/g and 264 F/g at the current density of 0.5 A/g. The amorphous structure, small size and narrow particle size distribution contributed to the high electrochemical performances of CoWO4. In addition, the CoWO4 also showed a low resistance and good cycle-life stability. Therefore, CoWO4 is a very promising electrode material for supercapacitors. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：15 / 22

页数：8

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