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1. (WO2017056981) LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND METHOD FOR EVALUATING SAME

Pub. No.:    WO/2017/056981    International Application No.:    PCT/JP2016/077040
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Thu Sep 15 01:59:59 CEST 2016
IPC: H01M 10/0525
G01R 31/36
H01M 4/525
H01M 10/04
H01M 10/0567
H01M 10/0569
H01M 10/058
Applicants: NEC ENERGY DEVICES, LTD.
NECエナジーデバイス株式会社
Inventors: SASAKI, Hideaki
佐々木 英明
KANEKO, Shinako
金子 志奈子
WATANABE, Kenji
渡邉 謙次
Title: LITHIUM ION SECONDARY BATTERY, METHOD FOR PRODUCING SAME, AND METHOD FOR EVALUATING SAME
Abstract:
Provided is a lithium ion secondary battery which includes: a positive electrode which contains, as the positive electrode active substance, a compound oxide that contains lithium and nickel and that has a lamellar crystal structure; a negative electrode which contains a graphite material as the negative electrode active substance; and an electrolyte. The lithium ion secondary battery has a Warburg coefficient (σ­0) per charge capacity as found by the alternating impedance method of 0.005 or less.