Improved electrochemical performances of LiM0.05Co0.95O1.95F0.05 (M = Mg, Al, Zr) at high voltage

Title
Improved electrochemical performances of LiM0.05Co0.95O1.95F0.05 (M = Mg, Al, Zr) at high voltage
Author
선양국
Keywords
Cathode material; Lithium batteries; Metal and fluorine substitution; High voltage
Issue Date
2012-07
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
Electrochimica Acta, Volume 68, 30, Pages 153-157
Abstract
Metal and F co-substituted LiM0.05Co0.95O1.95F0.05 (M = Mg, Al, Zr) cathode materials were successfully synthesized via a solid-state reaction. XRD measurements showed that cobalt and oxygen sites in LiCoO2 are successfully substituted for metal (Mg, Al, Zr) and fluorine, respectively. The co-substituted materials exhibited stable cycling performance, improved rate capability, and thermal stability compared to pristine LiCoO2. Furthermore, Co dissolution tests revealed that fluorine substitution stabilizes the cathode surface and thus suppresses Co dissolution. Among the materials, LiM0.05Co0.95O1.95F0.05 showed the best electrochemical and thermal properties. (C) 2012 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0013468612002605http://hdl.handle.net/20.500.11754/40384
ISSN
0013-4686
DOI
10.1016/j.electacta.2012.02.057
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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