Hydrothermal synthesized porous Co(OH)_2 nanoflake film for supercapacitor application  

作　　者：ZHANG YongQi XIA XinHui KANG Jing TU JiangPing 

机构地区：[1]State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China

出　　处：《Chinese Science Bulletin》2012年第32期4215-4219,共5页

基　　金：supported by China Postdoctoral Science Foundation (20100481401)

摘　　要：Porous Co(OH)2 film directly grown on nickel foam is prepared by a facile hydrothermal method.The as-prepared Co(OH)2 film possesses a structure consisting of randomly porous nanoflakes with thicknesses of 20-30 nm.The capacitive behavior of the Co(OH)2 film is investigated by cyclic voltammograms and galvanostatic charge-discharge tests in 2 mol/L KOH.The porous Co(OH)2 film exhibits a high discharge capacitance of 935 F g-1 at a current density of 2 A g-1 and excellent rate capability.The specific capacitance keeps a capacitance of 589 F g-1 when the current density increases to 40 A g-1.The specific capacitance of 82.6% is maintained after 1500 cycles at 2 A g-1.Porous Co（OH）2 film directly grown on nickel foam is prepared by a facile hydrothermal method. The as-prepared Co（OH）2 film possesses a structure consisting of randomly porous nanoflakes with thicknesses of 20-30 nm. The capacitive behavior of the Co（OH）2 film is investigated by cyclic voltammograms and galvanostatic charge-discharge tests in 2 mol/L KOH. The porous Co（OH）2 film exhibits a high discharge capacitance of 935 F g-1 at a current density of 2 A g-1 and excellent rate capability. The specific capacitance keeps a capacitance of 589 F g-1 when the current density increases to 40 A g-1. The specific capacitance of 82.6% is maintained after 1500 cycles at 2 A g-1.

关 键 词：超级电容器 多孔性 水热法合成 薄膜 纳米 CO(OH)2 应用 循环伏安 

分 类 号：TM53[电气工程—电器]