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6Li and 7Li MAS NMR and In Situ X-ray Diffraction Studies of Lithium Manganate Cathode Materials

Published online by Cambridge University Press:  10 February 2011

Young Joo Lee ,
Francis Wang ,
Clare P. Grey ,
Sanjeev Mukerjee  and
James McBreen
Young Joo Lee
Affiliation:
Dept. of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400
Francis Wang
Affiliation:
Dept. of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400
Clare P. Grey
Affiliation:
Dept. of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400
Sanjeev Mukerjee
Affiliation:
Dept. of Chemistry, Northeastern University, 360 Huntington Avenue, Boston, MA02115
James McBreen
Affiliation:
Department of Applied Sciences, Brookhaven National Laboratory, Upton, NY 11793-5000
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Abstract

6Li MAS NMR spectra of lithium manganese oxides with differing manganese oxidation states (LiMn2O4, Li4Mn5O12, Li2Mn4O9, and Li2Mn2O4) are presented. Improved understanding of the lithium NMR spectra of these model compounds is used to interpret the local structure of the LixMn2O4 cathode materials following electrochemical Li+ deintercalation to various charging levels. In situ x-ray diffraction patterns of the same material during charging are also reported for comparison. Evidence for two-phase behavior for x < 0.4 (LixMn2O4) is seen by both NMR and diffraction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 197
Copyright
Copyright © Materials Research Society 1999

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References

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