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1. (WO2018043515) POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME, POSITIVE ELECTRODE MIXTURE PASTE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Pub. No.:    WO/2018/043515    International Application No.:    PCT/JP2017/031032
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Wed Aug 30 01:59:59 CEST 2017
IPC: H01M 4/525
H01M 4/1391
H01M 4/36
H01M 4/505
Applicants: SUMITOMO METAL MINING CO., LTD.
住友金属鉱山株式会社
Inventors: OTSUKA, Yoshihiro
大塚 良広
SARUWATARI, Motoaki
猿渡 元彬
RYOSHI, Kazuomi
漁師 一臣
Title: POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME, POSITIVE ELECTRODE MIXTURE PASTE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Abstract:
Provided are the following: a positive electrode active substance which exhibits excellent output characteristics and charging and discharging capacity and in which gelation is suppressed; and a positive electrode mixture paste and non-aqueous electrolyte secondary battery using such positive electrode active substance. The positive electrode active substance for a non-aqueous electrolyte secondary battery contains a first lithium-metal composite oxide, which is represented by general formula (1): Lis1Ni1-x1-y1-z1Cox1Mny1Mz1O2+α and which includes a secondary particle formed by a plurality of primary particles aggregating, and at least either a first compound that contains lithium and boron or a second compound that contains lithium and tungsten, and satisfies at least either of the following characteristics (1) or (2): (1) he surfaces of the primary particles are covered with the first compound, and the content of boron is 0.01-0.5 mass% relative to the entirety of the positive electrode active substance; and (2) the surfaces of the primary particles are covered with the second compound, and the content of tungsten is 0.01-1.0 mass% relative to the entirety of the positive electrode active substance.