Correlating Electronic Structure with Cycling Performance of Substituted LiMn2O4 Electrode Materials:  A Study Using the Techniques of Soft X-ray Absorption and Emission

Correlating Electronic Structure with Cycling Performance of Substituted LiMn2O4 Electrode Materials:  A Study Using the Techniques of Soft X-ray Absorption and Emission

TitleCorrelating Electronic Structure with Cycling Performance of Substituted LiMn2O4 Electrode Materials:  A Study Using the Techniques of Soft X-ray Absorption and Emission
Publication TypeJournal Article
Year of Publication2000
AuthorsMelissa M Grush, Craig R Horne, Rupert CC Perera, David L Ederer, Stephen P Cramer, Elton J Cairns, Thomas A Callcott
JournalChemistry of Materials
Volume12
Issue3
Pagination659-664
Date Published03/2000
ISSN0897-4756
Abstract

Rechargeable batteries using LiMn2O4 cathodes are commercially attractive, if the problem of excessive capacity fading can be overcome. The cycling properties of these systems can be improved by partial metal substitution for the Mn. To understand the correlation between electrode performance and composition, Mn, Co, and Ni L-edge XAS and XES spectra of a series of LiMn2-yMeyO4 samples (Me = Co, Ni, Li) were recorded. Cobalt is shown to substitute into the spinel system as Co(III) and nickel as Ni(II). A positive correlation between the cycling stability of the electrode and the covalency of the Mn is observed.

DOI10.1021/cm990366e
Short TitleChem. Mater.