化学学报 ›› 2004, Vol. 62 ›› Issue (17): 1617-1620. 上一篇    下一篇

研究论文

超级电容器纳米氧化锰电极材料的合成与表征

张治安, 杨邦朝, 邓梅根, 胡永达, 汪斌华   

  1. 电子科技大学微电子与固体电子学院, 成都, 610054
  • 收稿日期:2004-02-01 修回日期:2004-04-01 出版日期:2004-09-14 发布日期:2014-02-17
  • 通讯作者: zhianzhang@sina.com
  • 作者简介:张治安E-mail:zhianzhang@sina.com
  • 基金资助:
    厦门信达电子股份有限公司博士后流动站基金资助项目.

Synthesis and Characterization of Nanostructured MnO2 for Supercapacitor

ZHANG Zhi-An, YANG Bang-Chao, DENG Mei-Gen, HU Yong-Da, WANG Bin-Hua   

  1. College of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu 610054
  • Received:2004-02-01 Revised:2004-04-01 Online:2004-09-14 Published:2014-02-17

以聚乙二醇为分散剂,利用高锰酸钾和醋酸锰溶液之间的化学共沉淀法制备纳米水合氧化锰.借助SEM,TEM,FT-IR,XRD和BET分析手段对样品结构及性能进行表征.研究结果表明,SEM和TEM显示所得粉体为纳米粉体,粒径大约为10~30nm左右,XRD分析表明该粉体为无定型a-MnO2·nH2O,FT-IR分析表明获得的粉体为水合物,BET测试比表面积达160.7m2/g.以氧化锰为研究电极,饱和甘汞电极(SCE)为参比电极,铂片为辅助电极的三电极体系中,以1 mol/L的Na2SO4溶液为电解液,通过循环伏安法研究其电化学行为.实验结果表明,纳米氧化锰是理想的超级电容器电极材料,在电位窗口为-0.2~0.9V(vs.SCE)范围内,扫描速度为4mV/s,其比电容达到203.4 F/g.

关键词: 超级电容器, 电极材料, 氧化锰, 循环伏安

Amorphous hydrous nanostructured MnO2 was synthesized in chemical coprecipitation method by mixing KMnO4 and manganese acetate aqueous solution using polyethylene glycol(PEG) as disperser.The product was characterized by SEM, TEM, FT-IR, XRD and BET.The results show that the amorphous hydrous nanoparticles with the mean particle size of 10~30 nm were obtained and BET specific surface areas are 160.7 m2/g.Electrochemical characterization was carried out by cyclic voltammetry (CV).Amorphous α-MnO2·nH2O in 1 mol/L Na2SO4 aqueous electrolyte was proved to be an excellent electrode material for supercapacitor.The specific capacitance of 203.4 F/g was obtained at the scan rate of 4 mV/s in the range of -0.2~0.9 V (vs.SCE).

Key words: supercapacitor, electrode material, MnO2, cyclic voltammetry