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1. (WO2015119084) COMPOSITION FOR FORMATION OF LITHIUM ION SECONDARY BATTERY ELECTRODE, ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCING COMPOSITION FOR FORMATION OF LITHIUM ION SECONDARY BATTERY ELECTRODE

Pub. No.:    WO/2015/119084    International Application No.:    PCT/JP2015/052893
Publication Date: Fri Aug 14 01:59:59 CEST 2015 International Filing Date: Tue Feb 03 00:59:59 CET 2015
IPC: H01M 4/13
H01M 4/133
H01M 4/139
H01M 4/1393
H01M 4/62
Applicants: SHOWA DENKO K.K.
昭和電工株式会社
Inventors: HANASAKI, Mitsuru
花崎 充
KURATA, Tomonori
倉田 智規
Title: COMPOSITION FOR FORMATION OF LITHIUM ION SECONDARY BATTERY ELECTRODE, ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY, AND METHOD FOR PRODUCING COMPOSITION FOR FORMATION OF LITHIUM ION SECONDARY BATTERY ELECTRODE
Abstract:
The present invention provides: a composition for the formation of a lithium ion secondary battery electrode, said composition making it possible to improve adhesiveness between an active material and a binder resin; an electrode for a lithium ion secondary battery; and a lithium ion secondary battery. This composition for the formation of a lithium ion secondary battery electrode comprises an active material and a binder resin. Therein, in the active material, the transverse relaxation time of water protons in a dispersion liquid as measured according to condition 1 below is 10 seconds or more, and in the binder resin, the transverse relaxation time of water protons in a water-based emulsion as measured according to condition 2 below is 200 seconds or more. Condition 1: A transverse relaxation time of water protons that is obtained by measuring, according to a pulse NMR method, an active material dispersion liquid formed by mixing, at a mass ratio of 52.8:0.5:46.6, an active material, carboxymethyl cellulose having a weight average molecular weight of 3000000 and a degree of substitution of 0.9, and water. Condition 2: A transverse relaxation time of water protons that is obtained by measuring, according to a pulse NMR method, an anionic water-based emulsion that includes 40 mass% of a binder resin.