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1. (WO2017149927) POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2017/149927    International Application No.:    PCT/JP2017/000201
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Jan 07 00:59:59 CET 2017
IPC: H01M 4/131
H01M 4/505
H01M 4/525
H01M 4/62
H01M 10/052
H01M 10/0566
Applicants: NEC ENERGY DEVICES, LTD.
NECエナジーデバイス株式会社
Inventors: FUJISAWA Ai
藤澤 愛
Title: POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY
Abstract:
This positive electrode for lithium ion secondary batteries is provided with a collector for positive electrodes and a positive electrode active material layer that is provided on the collector for positive electrodes. The positive electrode active material layer contains a positive electrode active material, a conductive assistant and a binder; the conductive assistant contains graphite flakes having an average thickness of 0.5 μm or less; and if D50 is the average particle diameter of the positive electrode active material, the average particle diameter of the graphite flakes is from (3 × active material D50/5) to (9 × active material D50/10) (inclusive).