Title:
リチウムイオン二次電池電極形成用組成物、リチウムイオン二次電池用電極及びリチウムイオン二次電池、並びにリチウムイオン二次電池電極形成用組成物の製造方法
Document Type and Number:
Japanese Patent JP6679142
Kind Code:
B2
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.
Inventors:
Mitsuru Hanasaki
Tomonori Kurata
Tomonori Kurata
Application Number:
JP2015560974A
Publication Date:
April 15, 2020
Filing Date:
February 02, 2015
Export Citation:
Assignee:
SHOWA DENKO K.K.
International Classes:
H01M4/1393; H01M4/133; H01M4/587; H01M4/62
Domestic Patent References:
| JP2001076731A | ||||
| JP2012059648A | ||||
| JP2013062080A | ||||
| JP2011243464A | ||||
| JP2013110108A |
Foreign References:
| WO2012111425A1 |
Attorney, Agent or Firm:
Tamotsu Otani
Makoto Kataoka
Arinaga Shun
Makoto Kataoka
Arinaga Shun