ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY COMPRISING LITHIUM CRYSTAL TITANIUM OXIDE HAVING RUMS DELITE TYPE CRYSTAL STRUCTURE, ITS MANUFACTURING METHOD, AND LITHIUM SECONDARY BATTERY USING THE OXIDE

摘要

PROBLEM TO BE SOLVED: To provide a lithium-chromium-titanium oxide having a ramsdellite type crystal structure which is useful as an active material of both positive electrode and negative electrode for a lithium secondary battery. SOLUTION: The lithium-chromium-titanium oxide having the ramsdellite type crystal structure is expressed as a general formula of Li2-x/3 Crx Ti3-2x/3 O7 (0x=1.5).