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Author Doeff, M. M. ♦ Richardson, T. J. ♦ Kepley, L.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ENERGY STORAGE ♦ ELECTRIC BATTERIES ♦ CATHODES ♦ SODIUM OXIDES ♦ STABILITY ♦ MANGANESE OXIDES ♦ MICROSTRUCTURE ♦ ELECTROCHEMISTRY ♦ SYNTHESIS ♦ IMPREGNATION
Abstract Electrochemical, thermal, and structural characterization of lithium insertion processes into orthorhombic Na{sub x}MnO{sub 2}-based materials is presented. Chimie douce oxidation, reduction, and/or exchange reactions of the precursor Na{sub 0.44}MnO{sub 2} can be used to prepare high capacity (180 mAh/g), high potential compounds for use in secondary lithium batteries. Lithiated Na{sub x}MnO{sub 2} is quite stable; formation of spinel phases occurs only under conditions of prolonged severe abuse during cycling in electrochemical cells, or upon heating to 500 C. The lithium-ion intercalation process is considerably more complex than that for sodium ions; features are seen in the electrochemical potential-step experiments that may be attributed to several phase transitions. These results are interpreted in terms of the unusual structure, and implications for future use of these materials in lithium batteries are discussed.
ISSN 00134651
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-08-01
Publisher Place United States
Journal Journal of the Electrochemical Society
Volume Number 143
Issue Number 8


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