Acta Scientiarum Naturalium Universitatis Pekinensis

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Influence of Characteristics of Li-Mn-O Spinel Oxide Grain on Its Electrochemical Performance

LI Wei1, 3), Tonggelage1), MU Qiyong1), XIE Yanting2)
(1)CITIC Guoan Mengguli New Energy Technology Co., Ltd, Beijing 102200; 2)New Energy Materials and Technology Laboratory, Departme   

  • Received:2006-09-18 Online:2006-12-30 Published:2006-12-30


李卫1, 3), 同格拉格1), 牟其勇1), 谢燕婷2)
(1)中信国安盟固利新能源科技有限公司,北京,102200; 2)北京大学化学与分子工程学院,应用化学系,新能源材料与技术实验室,北京,100871; 3)通讯作者, E-mail:   

Abstract: Spherical MnO2 and irregular shape MnO2 were synthesized by liquid redox method. Then, spherical Li-Mn-O spinel oxide was synthesized by high temperature reaction of MnO2 and LiOH. The difference of the two materials on physical chemistry characteristic and electrochemical performance were studied. The results show that the range of spherical Li-Mn-O spinel oxide granularity distribution is narrow and the specific surface area is small. The cycling performance of spherical Li-Mn-O spinel oxide is stable during the process of charge and discharge at normal temperature and significantly improved at high temperature.

Key words: lithium ion secondary battery, spherical Li-Mn-O spinel oxide, electrochemical performance

摘要: 采用液相氧化还原法合成了球形二氧化锰和无规则形状的二氧化锰,以此为原料,合成了球形锰酸锂和无规则形状的锰酸锂,比较了球形锰酸锂与无规则形状锰酸锂的物理化学性能及电化学性能的差异,结果表明:球形锰酸锂粒度分布范围窄,比表面积小,充放电循环特性在常温下十分稳定,在高温下也得到较大的改善。

关键词: 锂离子二次电池, 球形锰酸锂, 电化学性能

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