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

Title:

Document Type and Number:

WIPO Patent Application WO/2015/119084

Kind Code:

A1

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.

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Inventors:

HANASAKI MITSURU (JP)
KURATA TOMONORI (JP)

Application Number:

PCT/JP2015/052893

Publication Date:

August 13, 2015

Filing Date:

February 02, 2015

Export Citation:

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Assignee:

SHOWA DENKO KK (JP)

International Classes:

H01M4/13; H01M4/133; H01M4/139; H01M4/1393; H01M4/62

Domestic Patent References:

WO2012111425A1

2012-08-23

Foreign References:

JP2011243464A	2011-12-01
JP2013110108A	2013-06-06
JP2001076731A	2001-03-23
JP2012059648A	2012-03-22
JP2013062080A	2013-04-04

Attorney, Agent or Firm:

OHTANI, Tamotsu (JP)
Tamotsu Otani (JP)

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