锂离子电池正极材料LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2合成及表征

电化学（中英文） ›› 2005, Vol. 11 ›› Issue (1): 53-57.

锂离子电池正极材料LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2合成及表征

朱先军,陈宏浩,詹晖,杨代菱,周运鸿

武汉大学化学与分子科学学院,武汉大学化学与分子科学学院,武汉大学化学与分子科学学院,武汉大学化学与分子科学学院,武汉大学化学与分子科学学院湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072 ,湖北武汉430072

收稿日期:2005-02-28 修回日期:2005-02-28 出版日期:2005-02-28 发布日期:2005-02-28

Preparation and Characterization of LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2 as Cathode Materials for Lithium-ion Batteries

ZHU Xian-jun, CHEN Hong-hao, ZHAN Hui, YANG Dai-ling, ZHOU Yun-hong~*

(College of Chemical and Molecular Science, Wuhan University, Wuhan 430072, China

Received:2005-02-28 Revised:2005-02-28 Published:2005-02-28 Online:2005-02-28

摘要/Abstract

摘要： 　以LiOH·H2O、Ni2O3、Co2O3、TiO2和Mg(OH)2为原料,应用固相反应法合成Co Ti Mg共掺杂的LiNiO2化合物LiNi0. 85Co0. 10 (TiMg)0. 025O2;TG DTA、XRD、SEM和电化学测试表明,该材料首次放电容量达182. 7mAh/g(3. 0~4. 3V, 18mA/g), 10次循环之后,容量还有 175. 5mAh/g,容量保持率为 96. 2%;与未掺杂的LiNiO2相比,该材料显示出良好的循环性能,是一种很有应用前景的锂电池正极材料.

关键词: 锂离子电池, 正极材料, LiNi0.85Co0.10(TiMg)0.025O2, 共掺杂

Abstract: Cathode material of LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2 were prepared by solid state reaction at 725℃ for 24 h from LiOH·H_2O, Ni_2O_3, Co_2O_3, TiO_2 and Mg(OH)_2 under flowing oxygen, and were characterized by TG-DTA, XRD, SEM and electrochemical tests. Effort to simultaneously doped LiNiO_2 with Co-Ti-Mg has been tried to improve the cathode performance. The results show that co-doping definitely has a large beneficial effect in increasing the capacity (182.7mAh/g of the first discharge capacity for LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2) and cycling behavior (175.5 mAh/g after 10 cycles). This cathode materials can be applied for lithium-ion batteries.

Key words: Lithium-ion batteries, Cathode materials, LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2, Co-doping

中图分类号:

TM911

朱先军,陈宏浩,詹晖,杨代菱,周运鸿. 锂离子电池正极材料LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2合成及表征[J]. 电化学（中英文）, 2005, 11(1): 53-57.

ZHU Xian-jun, CHEN Hong-hao, ZHAN Hui, YANG Dai-ling, ZHOU Yun-hong~*. Preparation and Characterization of LiNi_(0.85)Co_(0.10)(TiMg)_(0.025)O_2 as Cathode Materials for Lithium-ion Batteries[J]. Journal of Electrochemistry, 2005, 11(1): 53-57.

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https://electrochem.xmu.edu.cn/CN/Y2005/V11/I1/53

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