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电化学(中英文) ›› 2001, Vol. 7 ›› Issue (4): 421-426. 

• 研究论文 • 上一篇    下一篇

合成条件对尖晶石LiMn_2O_4的电化学性能的影响

徐俊峰,江志裕   

  1. 复旦大学化学系,复旦大学化学系 上海200433 ,上海200433
  • 收稿日期:2001-11-28 修回日期:2001-11-28 出版日期:2001-11-28 发布日期:2001-11-28

The Influence of Synthesis Conditions on the Electrochemical properties of spinel LiMn_2O_4

XU Jun feng, JIANG Zhi yu *   

  1. (Department of Chemistry,Fudan University,Shanghai 200433,China
  • Received:2001-11-28 Revised:2001-11-28 Published:2001-11-28 Online:2001-11-28

摘要: 以Li2 CO3、LiOH、LiNO3以及电解MnO2 (EMD)作原料 ,用固相反应法合成了尖晶石LiMn2 O4 .结果表明 ,反应物种类及合成条件对LiMn2 O4 的电化学性质有很大的影响 .其中以LiNO3和EMD为合成原料制得的LiMn2 O4 性能最佳 .其制备条件分两步 :先在 2 80℃加热 6h ,使熔融的LiNO3渗入EMD微孔 ,然后在 75 0℃下焙烧合成

关键词: 固相反应法, 尖晶石LiMn2O4, 锂离子电池

Abstract: The electrochemical properties of spine LiMn 2O 4 synthesized via a solid state reaction were investigated. Electrolysis MnO 2(EMD), Li 2CO 3,LiOH and LiNO 3 were used as the initial materials. It was found that the electrochemical properties of LiMn 2O 4 were strongly influenced by the synthesis conditions. The LiMn 2O 4 samples prepared via the reaction of EMD and LiNO 3 showed the best properties for a lithium ion intercalation reaction. The procedure includes two steps: pretreatment at 280 ℃ for 6 hours to initiate the permeation of melting LiNO 3 into the micropores of EMD particles, followed by sintering at 750 ℃ for 24 hours.

Key words: Solid state reaction, Spinel LiMn 2O 4, Lithium ion battery

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