高容量正极材料0.08LiCo0.75Al0.25O2-0.92LiNiO2的合成与电化学性能研究

doi:10.61558/2993-074X.2927

电化学（中英文） ›› 2012, Vol. 18 ›› Issue (4): 332-336. doi: 10.61558/2993-074X.2927

• 化学电源近期研究专辑（武汉大学杨汉西教授主编） • 上一篇下一篇

高容量正极材料0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂的合成与电化学性能研究

王茹英, 邱天, 毛冲, 杨文胜*

北京化工大学化工资源有效利用国家重点实验室，北京 100029

收稿日期:2011-11-24 修回日期:2012-02-12 出版日期:2012-08-28 发布日期:2012-02-17
通讯作者: 杨文胜 E-mail:yangws@mail.buct.edu.cn
基金资助:
国家自然科学基金项目(No. 20971011)、新世纪优秀人才计划项目(No. NCET-08-0713)、中央高校基本科研业务费项目(No. ZD1004)和北京市共建项目专项资助

Synthesis and Electrochemical Properties of High-Capacity Cathode Material 0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂

WANG Ru-Ying, QIU Tian, MAO Chong, YANG Wen-Sheng*

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

Received:2011-11-24 Revised:2012-02-12 Published:2012-08-28 Online:2012-02-17
Contact: YANG Wen-Sheng E-mail:yangws@mail.buct.edu.cn

摘要/Abstract

摘要： 在恒定pH值下将层状钴铝双羟基复合金属氧化物（CoAl-LDH）均匀包覆在球状Ni(OH)₂表面，与LiOH.H₂O混合均匀后，经高温煅烧制得钴铝酸锂包覆镍酸锂0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂正极材料. 电化学测试表明，0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂正极比容量高，具有良好的倍率性能和循环寿命，其0.1C放电比容量为211 mAh.g^-1，0.5C放电比容量为195.6 mAh.g^-1，3C放电比容量为161 mAh.g^-1，0.5C 30周期循环后容量保持率为93.2%，明显优于LiNiO2和钴酸锂包覆镍酸锂0.08LiCoO₂-0.92LiNiO₂正极.

关键词: 锂离子电池, 正极材料, LiNiO₂, LiCo_0.75Al_0.25O₂, 包覆

Abstract: CoAl-LDH or Co(OH)₂ coated spherical Ni(OH)₂ precursors were obtained via a co-precipitation method at a constant pH. The mixtures of the precursors and LiOH.H₂O were annealed at high temperature in O₂ atmosphere, and then the cathode materials of 0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂, 0.08LiCoO₂-0.92LiNiO₂ and LiNiO₂ were synthesized. Effects of the coating layer were also studied. The results showed that the 0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂ material possessed the best rate and cycle life performance. The discharging capacities at 0.1C, 0.5C and 3C were 211 mAh.g^-1, 195.6 mAh.g^-1 and 161 mAh.g^-1, respectively, and the capacity retention ratio after 30 cycles at 0.5C was 93.2 %. These performances were much better than those of both pure LiNiO₂ and 0.08LiCoO₂-0.92LiNiO₂.

Key words: Li-ion battery, cathode material, LiNiO₂, LiCo_0.75Al_0.25O₂, coating

中图分类号:

TM 912.9

王茹英, 邱天, 毛冲, 杨文胜. 高容量正极材料0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂的合成与电化学性能研究[J]. 电化学（中英文）, 2012, 18(4): 332-336.

WANG Ru-Ying, QIU Tian, MAO Chong, YANG Wen-Sheng. Synthesis and Electrochemical Properties of High-Capacity Cathode Material 0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂[J]. Journal of Electrochemistry, 2012, 18(4): 332-336.

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高容量正极材料0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂的合成与电化学性能研究

Synthesis and Electrochemical Properties of High-Capacity Cathode Material 0.08LiCo_0.75Al_0.25O₂-0.92LiNiO₂

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