期刊
JOURNAL OF POWER SOURCES
卷 246, 期 -, 页码 417-422出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.07.110
关键词
Lithium metavanadate; Chemical diffusion coefficient; Cathode; Lithium ion battery
资金
- National Science and Technology Support Program [2012BAK30B04]
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
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.
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