Positive electrode active material for non-aqueous electrolyte secondary cell, and non-aqueous electrolyte secondary cell

• Main Authors: KAWADA HIROSHI, NISHIDE DAISUKE, KIDA YOSHINORI, NIINA FUMIHARU, YOSHIDA TOSHIKAZU
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2014
• Subjects: BASIC ELECTRIC ELEMENTS; 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

Provided is a positive electrode active material capable of improving the output characteristics of a non-aqueous electrolyte secondary cell. The positive electrode active material of the non-aqueous electrolyte secondary cell (1) includes a first positive electrode active material and a second positive electrode active material. The first positive electrode active material has a cobalt content equal to or greater than 15% in terms of the atomic percentage in the transition metals. The second positive electrode active material has a cobalt content equal to or less than 5% in terms of the atomic percentage in the transition metals. The average secondary particle diameter (r1) of the first positive electrode active material is less than the average secondary particle diameter (r2) of the second positive electrode active material.