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1. (WO2018221024) POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY

Pub. No.:    WO/2018/221024    International Application No.:    PCT/JP2018/015187
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Thu Apr 12 01:59:59 CEST 2018
IPC: H01M 4/131
H01M 4/505
H01M 4/525
H01M 4/62
Applicants: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
パナソニックIPマネジメント株式会社
Inventors: TAKEZAWA Hideharu
武澤 秀治
SHIOZAKI Tomoki
塩崎 朝樹
Title: POSITIVE ELECTRODE FOR SECONDARY BATTERY, AND SECONDARY BATTERY
Abstract:
This positive electrode for a secondary battery is provided with a positive electrode current collector and a positive electrode mixture layer, and the positive electrode mixture layer has a first positive electrode mixture layer and a second positive electrode mixture layer. The first positive electrode mixture layer comprises a positive electrode active material composed of compound A that contains Ni, Co, Al and Li. The second positive electrode mixture layer is disposed between the first positive electrode mixture layer and the positive electrode current collector, and comprises a positive electrode active material including: said compound A; and a Li-containing compound B which is smaller in specific capacity (mAh/g) and average particle diameter than said compound A. In said compound A, a ratio of Ni to the total number of moles of the metal elements except Li is 82 mol% or more. The average particle diameter of said compound B is 55% or less of the average particle diameter of said compound A.