ACTIVE MATERIAL, BATTERY, AND METHOD FOR MANUFACTURING ELECTRODE

• Main Author: ENDO KASUAKI
• Format: Patent
• Language: English
• Published: 18.11.2010
• Subjects: BASIC ELECTRIC ELEMENTS; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

PROBLEM TO BE SOLVED: To provide an active material for a nonaqueous electrolyte secondary battery excellent in discharge capacity and a capacity maintenance rate. SOLUTION: The active material for a nonaqueous electrolyte secondary battery includes first particles and second particles covering the surface of the each first particle so as to be scattered on the surface of the each first particle. The circularity of the first particles covered with the second particles, is to be 0.800 or more and 0.950 or less, with a ratio r1/r2 of a mean particle diameter r1 of the second particles and a mean particle diameter r2 of the first particles to be 1/20 or more and 1/2 or less. COPYRIGHT: (C)2011,JPO&INPIT