Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 4, Issue 4, Pages 344-348Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S1388-2481(02)00277-1
Keywords
lithium secondary batteries; spinel; ZnO coating; HF; Mn dissolution
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ZnO-coated LiNi0.5Mn1.5O4 powders with excellent electrochemical cyclability and structural stability have been synthesized. The electrochemical performance and structural stability of ZnO-coated LiNi0.5Mn1.5O4 electrodes in the 5 V region at elevated temperature has been studied as function of the level of ZnO coating. The 1.5 wt% ZnO-coated LiNi0.5Mn1.5O4 electrode delivers all initial discharge capacity of 137 mAh g(-1) with excellent cyclability at elevated temperature even at 55degreesC. The reason for the excellent cycling performance of ZnO-coated LiNi0.5Mn1.5O4 electrode is largely attributed to ZnO playing an important role of HF getting in the electrolyte. (C) 2002 Published by Elsevier Science B.V.
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