Electrochemical properties of LiNi1/3Co1/3Mn1/3O2 cathode material modified by coating with Al2O3 nanoparticles

被引：73
作者：
Araki, Kazuhiro [1 ]
Taguchi, Noboru [2 ]
Sakaebe, Hikari [2 ]
Tatsumi, Kuniaki [2 ]
Ogumi, Zempachi [1 ]
机构：
[1] Kyoto Univ, Off Soc Acad Collaborat Innovat, Kyoto 6110011, Japan
[2] AIST, Res Inst Ubiquitous Energy Devices, Ikeda, Osaka 5638577, Japan
来源：
JOURNAL OF POWER SOURCES | 2014年 / 269卷
关键词：
Lithium ion batteries; LiNi1/3Co1/3Mn1/3O2; Al2O3; coating; Nano particle; Mechano-chemical bonding technology; Crack; PERFORMANCE; LICOO2; IMPROVEMENT; ELECTRODES; MECHANISM;
D O I：
10.1016/j.jpowsour.2014.06.101
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：
LiNi1/3Co1/3Mn1/3O2 particles were coated with Al2O3 nanoparticles by means of a mechanochemical bonding process; SEM confirmed that the Al2O3 particles were uniformly coated over the surface of the LiNi1/3Co1/3Mn1/3O2 powder. During subsequent electrochemical testing using pouch cells, uncoated LiNi1/3Co1/3Mn1/3O2 exhibited a gradual capacity fading and an increase in area specific impedance (ASI) at a 50% state of charge. Under the same conditions, the increase in ASI of the Al2O3 modified samples was significantly suppressed, although the initial performance (charge/discharge capacity and ASI) slightly deteriorated. The Al2O3 coating was also effective in improving the cyclability of LiNi1/3Co1/3Mn1/3O2 at elevated temperatures by reducing the extent of cracking. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：236 / 243
页数：8
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