Capacity loss of lithium manganese oxide spinel in LiPF6/ethylene carbonate-dimethyl carbonate electrolytes

H Huang, Colin Angus Vincent, Peter George Bruce

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58 Citations (Scopus)

Abstract

The stability of lithium manganese oxide spinel in LiPF6/EC:DMC (ethylene carbonate-dimethyl carbonate) based electrolytes has been investigated at different states of charge and at temperatures between 21 and 55 degrees C. Reversible capacity loss due to reinsertion of lithium takes place at all states of charge and temperature. This reaction can proceed to the extent of inserting more than one Li per Mn2O4 at 55 degrees C resulting in the formation of tetragonal Li1+xMn2O4. The second process, irreversible capacity loss due to dissolution of the cathode, makes little contribution to capacity loss in highly charged electrodes, but has an effect comparable to reinsertion in discharged electrodes. (C) 1999 The Electrochemical Society. S0013-4651(98)06-038-8. All rights reserved.

Original languageEnglish
Pages (from-to)481-485
Number of pages5
JournalJournal of The Electrochemical Society
Volume146
Publication statusPublished - Feb 1999

Keywords

  • ION BATTERIES
  • LIMN2O4
  • CATHODES
  • INSERTION
  • CELLS

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