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电化学(中英文) ›› 1997, Vol. 3 ›› Issue (3): 277-281. 

• 研究论文 • 上一篇    下一篇

非水介质中Zn-MnO_2的可充性研究

李保旗,杨汉西,李升宪,杜米芳,艾新平   

  1. 武汉大学化学系
  • 收稿日期:1997-08-28 修回日期:1997-08-28 出版日期:1997-08-28 发布日期:1997-08-28

Rechargeability of Zn MnO 2 in Non aqueous Electrolyte

Li Baoqi * Yan Hanxi Du Mifang Ai Xingping   

  1. (Dept. of Chem., Wuhan Univ., Wuhan 430072
  • Received:1997-08-28 Revised:1997-08-28 Published:1997-08-28 Online:1997-08-28

摘要: 报道了以尖晶石型二氧化猛(λ-MnO2)为正极,1mol·L-1Zn(ClO4)2的碳酸丙烯酯为电解液构成Zn-MnO2二次电池体系的充放电性质和反应机理分析.结果表明,这一体系的充放电过程表现为Zn在λ-MnO2中的电化学嵌入和脱嵌反应.在x≤0.5的范围内,ZnxMn2O4的尖晶石结构稳定,Zn的嵌脱反应可逆性良好.由此构成的模拟电池显示出良好的循环寿命(>200次)和较高的充放电效率(>90%).

关键词: 锌, 二氧化锰, 非水溶剂, 可充性, 嵌入反应

Abstract: A novel Zn MnO 2 battery ststem by use of spinel related MnO 2 as positive electrode and Zn(ClO 4) 2 in propyl carbonate as electrolyte was constructed and its charge discharge behaviour was studied. The results show that the cell reaction of the system proceeds through the electrochemical intercalation of zinc into the crystalline lattice of MnO 2 to form Zn x Mn 2O 4 . At x≤0.5 , Zn x Mn 2O 4 remains its spinel structure stable and exhibits high reversibility for zinc intercalation. As a result, the battery system demonstrates excellent cycleability (>200 cycles), higher discharge charge efficiency (>90%) and prolonged storage life.

Key words: Zinc, Manganese dioxide, Non aqueous electrolyte, Rechargeability, Intercalation

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