Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 3, Pages 1353-1357Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.09.040
Keywords
AlF3; Coating; Spinel; Cathode; Lithium; Battery
Funding
- Ministry of Knowledge Economy (MKE), of the Korean Government [2008-11-0055]
- (MEST) of the Korean Government [2009-0092780]
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The electrochemical performance of AlF3-coated Li1.1Al0.05Mn1.85O4 spinel was investigated. The morphology of the AlF3-coated Li1.1Al0.05Mn1.85O4 was observed by SEM and TEM, and the thickness of the coating layer was approximately 10 nm. Capacity retention and rate capability were substantially improved by the AlF3-coating, as compared to pristine Li1.1Al0.05Mn1.85O4. Manganese dissoulution was also dramatically reduced for the AlF3-coated Li1.1Al0.05Mn1.85O4, which may reflect lower impedance for the coated spinel. The thermal stability of the AlF3-coated Li1.1Al0.05Mn1.85O4 was improved, exhibiting an exothermic reaction at higher temperature with reduced heat generation, compared to the pristine Li1.1Al0.05Mn1.85O4. (C) 2010 Elsevier B.V. All rights reserved.
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