Synthesis and electrochemical properties of nanocrystalline Li［Li_1/3Ti_5/3O₄］ by complex sol-gel method

来源期刊：中国有色金属学报(英文版)2004年第5期

论文作者：杨建文 钟晖 钟海云 戴艳阳 李荐 赵绚

文章页码：1012 - 1016

Key words：Li［Li_1/3Ti_5/3O₄］; synthesis; sol-gel method; electrochemical properties

Abstract: Li［Li_1/3Ti_5/3O₄］ spinel-framework structure material is a kind of great interest for negative electrodes in energy storage cell. The synthesis of nanocrystalline Li［Li_1/3Ti_5/3O₄］ by sol-gel method using inorganic compounds and citric acid is developed, and single phase powder is obtained above 700℃. The electrochemical performances of Li［Li_1/3Ti_5/3O₄］ cathodes in lithium cell are studied. Special capacities are 131 mA·h·g^-1 at 0.5C rate and 154 mA·h·g^-1 at 0.1C in cycle test. No passivation layer is formed on Li［Li_1/3Ti_5/3O₄］ anode in lithium ion battery, and it is much safer than lithium metal and carbonaceous anodes. Faradic impedance in the charged cell is remarkably higher than that in discharged state, which is caused by distinct conductivities of Li［Li_1/3Ti_5/3O₄］ and Li₂［Li_1/3Ti_5/3O₄］.