Synthesis and electrochemical properties of nanocrystalline Li［Li1/3Ti5/3O4］ by complex sol-gel method|YANG Jian-wen(杨建文), ZHONG Hui(钟晖),ZHONG Hai-yun(钟海云), DAI Yan-yang(戴艳阳),LI Jian(李荐), ZHAO Xuan(赵绚)-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 14 No. 5 October 2004

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

YANG Jian-wen(杨建文), ZHONG Hui(钟晖),
ZHONG Hai-yun(钟海云), DAI Yan-yang(戴艳阳),
LI Jian(李荐), ZHAO Xuan(赵绚)

（School of Metallurgical Science and Engineering,
Central South University, Changsha 410083, China）

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］.

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW