Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (17): 1617-1620. Previous Articles     Next Articles


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
  • 投稿日期:2004-02-01 修回日期:2004-04-01 发布日期:2014-02-17
  • 通讯作者:
  • 作者简介:张治安
  • 基金资助:

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 Published:2014-02-17

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