Capacity loss of lithium manganese oxide spinel in LiPF{sub 6}/ethylene carbonate-dimethyl carbonate electrolytes

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1391632· OSTI ID:328204

Huang, H; Vincent, C A; Bruce, P G ^[1]

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1. Univ. of St. Andrews, Fife (United Kingdom). School of Chemistry

The stability of lithium manganese oxide spinel in LiPF{sub 6}/EC:DMC (ethylene carbonate-dimethyl carbonate) based electrolytes has been investigated at different states of charge and at temperatures between 21 and 55 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 Mn{sub 2}O{sub 4} at 55 C resulting in the formation of tetragonal Li{sub 1+x}Mn{sub 2}O{sub 4}. 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.

• OSTI ID: 328204
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 2 Vol. 146; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
36 MATERIALS SCIENCE
DISSOLUTION
ELECTRICAL PROPERTIES
ELECTROLYTES
LITHIUM
LITHIUM OXIDES
MANGANESE OXIDES
METAL-NONMETAL BATTERIES