MODIFIED LITHIUM MANGANESE NICKEL-BASED MULTIPLE OXIDE, ITS PRODUCTION METHOD, LITHIUM SECONDARY BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL, AND LITHIUM SECONDARY BATTERY

• Main Authors: OTA HIROKUNI, YONEKAWA FUMIHIRO
• Format: Patent
• Language: English
• Published: 09.02.2006
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide a modified lithium manganese nickel-based multiple oxide useful as a positive electrode active material of a lithium secondary battery, its production method, a lithium secondary battery positive electrode active material and a lithium secondary battery excellent in cycle characteristics and coulomb efficiencies. SOLUTION: This modified lithium manganese nickel-based multiple oxide is characterized in that the surface of a lithium manganese nickel-based multiple oxide expressed by formula (1): LixMn1.5Ni0.5O4-w(0<x<2; 0≤w<2) is coated with a metal oxide containing at least one metal element selected from among Mg, Al, Ti, Zr and Zn. The method for producing it, the lithium secondary battery positive electrode active material and the lithium secondary battery are provided. COPYRIGHT: (C)2006,JPO&NCIPI