Structural changes of LiMn{sub 2}O{sub 4} spinel electrodes during electrochemical cycling
Journal Article
·
· Journal of the Electrochemical Society
Structural changes of LiMn{sub 2}O{sub 4} spinel electrodes have been investigated in 4 V Li/Li{sub x}Mn{sub 2}O{sub 4} cells by X-ray diffraction during prolonged electrochemical cycling between 4.5 and 3.4 V at room temperature. The capacity fade that is observed during cycling is attributed, at least partly, to disproportionation reactions at the particle surface of discharged Li{sub x}Mn{sub 2}O{sub 4} electrodes, resulting in a soluble MnO component. The disproportionation reactions are described with respect to the Li-Mn-O phase diagram. The data support recent reports that Li{sub 2}Mn{sub 2}O{sub 4} can be formed at the electrode surface slightly above 3 V when cells are discharged and charged at high rates.
- Research Organization:
- Samsung Display Devices Co., Chonan City (KR)
- Sponsoring Organization:
- US Department of Energy
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 20001066
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 10 Vol. 146; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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