Study of full concentration-gradient Li(Ni0.8Co0.1Mn0.1)O2 cathode material for lithium ion batteries

被引：51
作者：
Hua, Chuanshan [1 ]
Du, Ke [1 ]
Tan, Chaopu [1 ]
Peng, Zhongdong [1 ]
Cao, Yanbing [1 ]
Hu, Guorong [1 ]
机构：
[1] Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 614卷
关键词：
Lithium ion batteries; Cathode materials; Concentration-gradient; High capacity; Rate performance; ELECTROCHEMICAL PERFORMANCE; LIAL1/4NI3/4O2 R(3)OVER-BAR-M; SHUTTLECOCK BATTERIES; INSERTION MATERIAL; THERMAL-BEHAVIOR; HIGH-ENERGY; LINI1/3CO1/3MN1/3O2; LINI0.8CO0.1MN0.1O2; COPRECIPITATION; SPECTROSCOPY;
D O I：
10.1016/j.jallcom.2014.06.049
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A high-energy full concentration-gradient cathode material with an average composition of Li(Ni0.8Co0.1-Mn0.1)O-2 has been successfully synthesized by a hydroxide co-precipitation method. Ni content decreases gradually along the radius of the spherical particle, and the content of Co and Mn increases. The electrochemical properties of this concentration-gradient material are studied and compared to those of the homogeneous Li(Ni0.8Co0.1Mn0.1)O-2 material. In the concentration-gradient material of Li(Ni0.8Co0.1Mn0.1)O-2, the inside part rich in Ni delivers a very high capacity, while the Mn-rich outside part improves the cycling stability and rate performance. The concentration-gradient material has superior electrochemical properties compared to the homogeneous material. The initial capacity of the concentration-gradient Li(Ni0.8Co0.01Mn0.1)O-2 is 185.2 mA h g(-1) at I C between 2.8 and 4.3 V and retains 93.2% after 100 cycles. The composite also has a good rate performance with a high capacity of about 175 mA h g(-1) even at 2 C rate. (C) 2014 Elsevier B.V. All rights reserved.
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页码：264 / 270
页数：7
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