Synthesis and electrochemical performance of macroporous LiNi0.5Co0.2Mn0.3O2 by a modified sol-gel method

被引：31
作者：
Kong, Ji-Zhou [1 ,2 ]
Zhai, Hai-Fa [2 ]
Ren, Chong [1 ]
Gao, Mo-Yun [2 ]
Zhang, Xiang [1 ]
Li, Hui [2 ]
Li, Jun-Xiu [3 ]
Tang, Zhou [3 ]
Zhou, Fei [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China
[2] Nanjing Univ, Dept Mat Sci & Engn, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Jiangsu Cobalt Nickel Met Co Ltd KLK, Taixing 225404, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷
基金：
中国博士后科学基金;
关键词：
Sol-gel method; LiNi0.5Co0.2Mn0.3O2; Annealing temperature; Structural; Electrochemical properties; CATHODE MATERIAL;
D O I：
10.1016/j.jallcom.2013.07.007
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：
Macroporous LiNi0.5Co0.2Mn0.3O2 particles were prepared by a modified sol-gel method based on resorcinol and formaldehyde. The influence of annealing temperature on the physical and electrochemical performance was investigated. Among these oxides, 800 degrees C-annealed LiNiO3Co0.2Mn0.3O2 with good crystallinity delivers the highest value of integrated intensity I-(003)/I-(104) and the lowest value of (I-(006)+I-(102))/I-(101), implying that this sample has the least cation mixing and best hexagonal ordering. This sample exhibits a high initial discharge capacity of 167.9 mAh/g tested at 50 mA/g, the largest capacity retention of 92.1% after 50 cycles at 300 mA/g, and the highest discharge capacity of 138.2 mAh/g at 1000 mA/g. The excellent electrochemical performance of this oxide is attributed to its well crystallinity, high cation ordering, and good hexagonal ordering. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：507 / 510
页数：4
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