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1. (WO2018021480) POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY USING SAME

Pub. No.:    WO/2018/021480    International Application No.:    PCT/JP2017/027262
Publication Date: Fri Feb 02 00:59:59 CET 2018 International Filing Date: Fri Jul 28 01:59:59 CEST 2017
IPC: H01M 4/58
H01M 4/36
Applicants: TDK CORPORATION
TDK株式会社
Inventors: SHITABA Junpei
下羽 淳平
OTSUKI Keitaro
大槻 佳太郎
SEKI Hideaki
関 秀明
SADAMURA Hideaki
貞村 英昭
Title: POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR LITHIUM ION SECONDARY BATTERIES, POSITIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERIES, AND LITHIUM ION SECONDARY BATTERY USING SAME
Abstract:
The purpose of the present invention is to provide a positive electrode active substance for lithium ion secondary batteries having high rate characteristics, a positive electrode for lithium ion secondary batteries, and a lithium ion secondary battery using same. The present invention pertains to a positive electrode active substance for lithium ion secondary batteries, characterized by: having a two dimensionally expanding carbon material and active substance particles having as the main component thereof a lithium vanadium phosphate indicated by compositional formula Lia(M)b(PO4)c (M being VO or V, 0.05 ≤ a ≤ 3.3, 0.9 ≤ b ≤ 2.2, and 0.9 ≤ c ≤ 3.3.); and the carbon material at least partially containing plate-shaped carbon particles or graphene and covering at least part of the surface of the active substance particles.