M{sup 3+}-modified LiMn{sub 2}O{sub 4} spinel intercalation cathodes. 1: Admetal effects on morphology and electrochemical performance
- Covalent Associates, Inc., Woburn, MA (United States)
Low levels of trivalent cations were utilized to stabilize LiMn{sub 2}O{sub 4} spinel cathode materials against capacity decline during electrochemical cycling. Of the several single-phase products obtained, only those with Cr{sup 3+} and Ga{sup 3+} prevented capacity fade, and only LiCr{sub 0.02}Mn{sub 1.98}O{sub 4} exhibited acceptable initial reversible capacity. The external particle morphology was unchanged by the preparation or the admetal, and the internal structures were all converted to cong tou (onion) configurations during product synthesis. Grain size played a surprising role in cathode performance <25 {micro}m material had at least 10% lower capacity than larger or as-prepared Cr-doped LiMn{sub 2}O{sub 4}.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 562208
- Journal Information:
- Journal of the Electrochemical Society, Vol. 144, Issue 10; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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