Studies of Nano-sized Co_3O_4 as Anode Materials for Lithium-ion Batteries

作     者：黄峰 詹晖 周运鸿 

作者机构：College of Chemistry and Molecular Science 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2003年第21卷第10期

页      面：1275-1279页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0703[理学-化学] 

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .2 983 3 0 90 ) 

主　　题：cobalt oxide anode material lithium ion battery rheological phase reaction 

摘      要：The structural evolution of the Co 3O 4 fine powders prepared by rheological phase reaction and pyrolysis method upon different temperature has been investigated using X ray diffraction (XRD) topography. The electrochemical performance of Co 3O 4 electrode materials for Li ion batteries is studied in the form of Li/Co 3O 4 cells. The reversible capacity as high as 930 mAh/g for the Co 3O 4 sample heat treated at 600 ℃ is achieved and sustained over 30 times charge discharge cycles at room temperature. The detailed information concerning the reaction mechanism of Co 3O 4 active material together with lithium ion is obtained through ex situ XRD topography, X ray photoelectron spectroscopy (XPS) analysis and cyclic voltammetry (CV) technique. And it is revealed that a “two step reaction is involved in the charge and discharge of the Li/Co 3O 4 cells, in which Co 3O 4 active material is reversibly reduced into x Co· (3- x )CoO and then into metallic Co.