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电化学(中英文) ›› 1998, Vol. 4 ›› Issue (3): 328-333. 

• 研究论文 • 上一篇    下一篇

纳米电极材料的制备及其电化学性质研究(Ⅲ)——微乳液中通氧气制备MnO_2及其性能

刘玲,夏熙   

  1. 新疆大学应用化学所
  • 收稿日期:1998-08-28 修回日期:1998-08-28 出版日期:1998-08-28 发布日期:1998-08-28

Studies on the Preparation of Nanophase Electrode Materials and Its Electrochemical Properties(Ⅲ)—Performance of nm γ MnO 2 Obtained by Microemulsion Method

Liu Ling Xia Xi *   

  1. (Department of Chemistry, Xinjiang University, Urumqi 830046
  • Received:1998-08-28 Revised:1998-08-28 Published:1998-08-28 Online:1998-08-28

摘要: 本文采用锰盐微乳液中通氧气法成功制备了超细粉末MnO2,对所得样品进行了化学分析,XRD,TEM测试,证明为γMnO2,平均粒径在纳米级范围内.再经恒电流放电,循环伏安,分形维数,交流阻抗等测试,发现在适当制备条件下所得纳米MnO2具有良好的放电性能,并对此作了初步的理论探讨

关键词: 乳液法, 纳米微粒, MnO_2, 电化学活性

Abstract: A nanophase MnO 2 was synthesized using w/o microemulsion as reation media, The most favorable experiment conditions for the preparation of nm MnO 2 were researched. XRD,TEM,AC impedance, cyclic voltammetry etc. examinations were used to characterize the sample comparison with the classical MnO 2 (I.C.No.1EMD,electrolytic manganese dioxide). Sample shows that the crystal styucture of the synthesized samples are mainly γ MnO 2, with average particle size in the nanometer as shown by TEM. It was found that the discharge capacity of nm MnO 2 obtained is significantly higher than that of the I.C.No.1 EMD.

Key words: Microemulsion process, Nanophase particle, MnO 2, Electrochemical activity

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