Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 6, Issue 8, Pages 821-826Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2004.06.005
Keywords
5 V lithium batteries; LiNi0.5Mn1.5O4 electrodes; elevated temperatures; cycling performance
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The electrochemical behavior of substituted spinel-nickel electrodes, LiNi0.5Mn1.5O4, was studied during prolonged cycling (Li-ion extraction/insertion) and storage at elevated temperatures. We have found that using an appropriate cycling protocol (constant current/constant voltage) of Li/LiNi0.5Mn1.5O4 cells, high charge-discharge capacities of the positive electrodes, around 140 mAh/g, can be obtained. At elevated temperatures, spinel-nickel electrodes demonstrated a stable performance and sufficient capacity retention in electrolyte solutions comprising alkyl carbonates (EC, DMC) and LiPF6. (C) 2004 Elsevier B.V. All rights reserved.
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