Understanding the trace Ti surface doping on promoting the low temperature performance of LiNi1/3Co1/3Mn1/3O2 cathode

被引：80
作者：
Li, Guangyin [1 ,2 ]
Huang, Zhenlei [3 ]
Zuo, Zicheng [3 ]
Zhang, Zhanjun [1 ]
Zhou, Henghui [2 ]
机构：
[1] Univ Chinese Acad Sci, Coll Chem & Chem Engn, Beijing 100049, Peoples R China
[2] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
[3] Beijing Engn Res Ctr Power Lithium Ion Battery, Beijing 102200, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2015年 / 281卷
关键词：
Lithium ion batteries; Surface property; Lithium nickel cobalt manganese oxide; Low temperature; LITHIUM-ION BATTERIES; ELECTROCHEMICAL PERFORMANCES; ELECTROLYTES; LIFEPO4; POWER; CARBONATE; IMPROVEMENT; ADDITIVES; DIFFUSION; IMPEDANCE;
D O I：
10.1016/j.jpowsour.2015.01.173
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：
The effect of surface property of LiNi1/3Co1/3Mn1/3O2 on the low temperature performance is seldom studied. Herein, the trace Ti surface-doped LiNi1/3Co1/3Mn1/3O2 exhibits enhanced discharge capacity under low temperature. After doping, the discharge capacity of LiNi1/3Co1/3Mn1/3O2 at -20 degrees C is 51.3 mAh g(-1) at 5C, which is near twice as much as the bare material (30.1 mAh g(-1)). Via the X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and X-ray photoelectron spectroscopy analysis, it is confirmed that Ti doping on the surface significantly alters the surface property of LiNi1/3Co1/3Mn1/3O2 particle. The surface-doped Ti efficiently changes the lattice parameters, reduces the electrochemical reaction resistance and finally enhances the discharge capacity. The study clarifies the nature of trace Ti surface doping and is helpful for understanding the enhancement mechanism of the low temperature performance of LiNi(1/3)Co(1/3)Ma(1/3)O(2). (C) 2015 Elsevier B.V. All rights reserved.
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页码：69 / 76
页数：8
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