A novel method for the preparation of submicron-sized LiNi0.8CO0.2O2 cathode material

被引：10
|
作者：
Yang, Zhanxu [1 ]
Wang, Bei [1 ]
Yang, Wensheng [1 ]
Wei, Xun [1 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2007年 / 52卷 / 28期
基金：
中国国家自然科学基金;
关键词：
lithium-ion battery; cathode material; layered LiNi0.8Co0.2O2; Ni-Co hydroxide-carbonate precursor; submicron-sized particle;
D O I：
10.1016/j.electacta.2007.07.002
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A novel method has been employed to synthesize layered LiNi0.8Co0.2O2 cathode material by calcination of Ni-Co hydroxide-carbonate precursor prepared by a route involving separate nucleation and aging steps (SNAS) together with LiOH under air atmosphere. Thermogravimetry (TG) and differential thermal analysis (DTA) combined with on-line evolved gas mass spectrometry (EGMS) analysis were employed to study the reaction process. The synthesized material was characterized by means of X-ray diffraction (XRD), laser particle size distribution analysis, field emission scanning electron microscope (FE-SEM) and galvanostatic charge/discharge cycling. The synthesized LiNi0.8Co0.2O2 presents a narrow distribution of submicron-sized particles and exhibits a good electrochemical property with initial discharge specific capacity of 194.8 mAh g(-1) in the voltage range 2.75-4.5 V (versus Li/Li+). The novel method for the preparation of submicron-sized LiNi0.8Co0.2O2 material has the particular advantage of simple synthesis process and low synthesis cost. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：8069 / 8074
页数：6
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