Oxalic acid-assisted combustion synthesized LiVO3 cathode material for lithium ion batteries

被引：44
|
作者：
Jian, X. M. [1 ,2 ]
Wenren, H. Q. [3 ]
Huang, S. [1 ,2 ]
Shi, S. J. [1 ,2 ]
Wang, X. L. [1 ,2 ]
Gu, C. D. [1 ,2 ]
Tu, J. P. [1 ,2 ]
机构：
[1] Zhejiang Univ, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China
[2] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Zhejiang, Peoples R China
[3] Zhejiang GBS Energy Co Ltd, Ningbo 315400, Zhejiang, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2014年 / 246卷
关键词：
Lithium metavanadate; Chemical diffusion coefficient; Cathode; Lithium ion battery; ELECTROCHEMICAL PERFORMANCE; LI3V2(PO4)(3)/C CATHODE; LI; LIV3O8; LIMN2O4; CAPACITY; NANOCRYSTALLINE; LINI0.5MN1.5O4; GITT;
D O I：
10.1016/j.jpowsour.2013.07.110
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：
LiVO3 materials are synthesized by combustion method with oxalic acid as fuel. Owing to its relatively low crystallization and small particle size, the LiVO3 calcined at 450 degrees C for 2 h displays optimal electrochemical performances, delivering a high discharge capacity of 298.4 mAh g(-1) and 262.5 mAh g(-1) between 1.0 and 3.5 V at a current density of 50 mA g(-1) and 500 mA g(-1) respectively, and exhibiting good cyclic stability. In this work, the chemical diffusion coefficient of Li+ (DLi+) in the LiVO3 electrode is determined by electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT). The value calculated by EIS is in the range of 10(-9)-10(-8) cm(2) s(-1), while it calculated by GITT is 10(-95)-10(-8) cm(2) s(-1). (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：417 / 422
页数：6
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