物理化学学报 >> 2013, Vol. 29 >> Issue (02): 305-310.doi: 10.3866/PKU.WHXB201211201

电化学和新能源 上一篇    下一篇

氧化钌/石墨纳米片复合阵列电极的制备及其电容性能

胡英瑛, 胡中爱, 张亚军, 鲁爱莲, 徐欢, 张子瑜, 杨玉英, 李丽, 吴红英   

  1. 西北师范大学化学化工学院, 甘肃省高分子材料重点实验室, 生态环境相关高分子材料教育部重点实验室, 兰州 730070
  • 收稿日期:2012-09-07 修回日期:2012-11-19 发布日期:2013-01-14
  • 通讯作者: 胡中爱 E-mail:Zhongai@nwnu.edu.cn

Synthesis and Electrochemical Characterization of RuO2·xH2O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors

HU Ying-Ying, HU Zhong-Ai, ZHANG Ya-Jun, LU Ai-Lian, XU Huan, ZHANG Zi-Yu, YANG Yu-Ying, LI Li, WU Hong-Ying   

  1. Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P.R. China
  • Received:2012-09-07 Revised:2012-11-19 Published:2013-01-14

摘要:

通过电化学剥离法在石墨棒表面构筑了层数不等、彼此平行且垂直于基底的二维石墨纳米片(GNS)阵列, 而后采用阴极还原电沉积法在GNSs 表面均匀地包覆了一层氧化钌(RuO2·xH2O)薄膜, 形成了RuO2·xH2O/GNS 复合阵列电极. 电化学测试表明, RuO2·xH2O/GNS 复合阵列电极具有优良的超电容性能, 在0.5mol·L-1 H2SO4电解质溶液中, 扫描速率为5 mV·s-1, 电位窗口为0.9 V时, 其比电容高达4226 F·m-2, 并且具有优异的循环性能, 经过20000圈充放电循环后, 电容保持率高达94.18%.

关键词: 超级电容器, 石墨纳米片, 氧化钌, 电沉积, 阵列电极

Abstract:

We used electrochemical exfoliation to construct graphite nanosheet (GNS) arrays, in which the varying number of nanosheet layers were parallel to each other and perpendicular to the carbon substrate. Hydrous ruthenium oxide (RuO2·xH2O) was then loaded directly on the surface of nanosheets using cathodic reduction electrodeposition, resulting in the formation of RuO2·xH2O/GNS composite array electrodes. Electrochemical measurements showed that the composite array electrodes exhibited excellent capacitive behaviors, and achieved specific capacitance values as high as 4226 F·m-2 in the potential window up to 0.9 V, with a scan rate of 5 mV·s-1 in 0.5 mol·L-1 H2SO4 solution. The RuO2·xH2O/GNS composite array electrodes showed good cycling abilities, and maintained 94.18% of their maximum performance after 20000 cycles.

Key words: Supercapacitor, Graphite nanosheet, RuO2, Electrodeposition, Array electrode

MSC2000: 

  • O646