Agent for dispersing electrically conductive carbon material, and dispersion of electrically conductive carbon material

Patent metadata

Field	Value
Publication number	US-2016200850-A1
Application number	US-201414915087-A
Country	US
Kind code	A1
Filing date	Aug 25, 2014
Priority date	Aug 27, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

Provided is an agent for dispersing an electrically conductive carbon material, in which the agent consists of a polymer which has an oxazoline group in a side chain and which is obtained by using an oxazoline group-containing monomer such as that represented by formula (1) for example, and in which the agent exhibits excellent dispersion of an electrically conductive carbon material and produces a thin film that exhibits excellent adhesion to a current collection substrate when formed into a thin film together with the electrically conductive carbon material.

(In the formula, X denotes a polymerizable carbon-carbon double bond-containing group, and R 1 -R 4 each independently denote a hydrogen atom, a halogen atom, an alkyl group optionally having a branched structure having 1-5 carbon atoms, an aryl group having 6-20 carbon atoms, or an aralkyl group having 7-20 carbon atoms.)

First claim

1 . An agent for dispersing an electrically conductive carbon material, the agent consisting of a polymer having a pendant oxazoline group.

2 . The conductive carbon material-dispersing agent of claim 1 , wherein the polymer is water soluble.

3 . The conductive carbon material-dispersing agent of claim 2 , wherein the polymer is obtained by radical-polymerizing at least two monomers: an oxazoline monomer having a polymerizable carbon-carbon double bond-containing group at position 2, and a (meth) acrylic monomer having a hydrophilic functional group.

4 . A dispersion of an electrically conductive carbon material, characterized by comprising the conductive carbon material-dispersing agent of claim 1 , an electrically conductive carbon material and a solvent, wherein the conductive carbon material is dispersed in the solvent.

5 . The conductive carbon material dispersion of claim 4 , wherein the solvent is water.

6 . The conductive carbon material dispersion of claim 4 or 5 , further comprising a crosslinking agent.

7 . The conductive carbon material dispersion of claim 4 , further comprising a matrix polymer.

8 . An electrically conductive thin-film-forming composition comprising the conductive carbon material dispersion of claim 4 .

9 . An electrically conductive thin-film obtained from the conductive thin film-forming composition of claim 8 .

10 . The conductive thin-film of claim 9 for use as an electrically conductive bonding layer that is interposed between, and bonds together, a current-collecting substrate which make up an energy storage device electrode and an active material layer.

11 . A composite current collector for an energy storage device electrode, comprising a current-collecting substrate and, formed on the substrate, an electrically conductive bonding layer consisting of the conductive thin-film of claim 9 .

12 . An electrode for an energy storage device, comprising the composite current collector for an energy storage device electrode of claim 11 .

13 . The energy storage device electrode of claim 12 , comprising the composite current collector for an energy storage device electrode and, formed on the conductive bonding layer of the composite current collector, an active material layer.

14 . An energy storage device comprising the energy storage device electrode of claim 12 or 13 .

15 . A thin-film obtained from the conductive carbon material dispersion of claim 4 .

16 . A method for dispersing an electrically conductive carbon material by using an electrically conductive carbon material-dispersing agent to disperse an electrically conductive carbon material in a solvent, the method being characterized in that the conductive carbon material-dispersing agent is a polymer having a pendant oxazoline group.

17 . A method for producing an electrically conductive carbon material-dispersing agent by using an electrically conductive carbon material dispersant to disperse an electrically conductive carbon material in a solvent, the method being characterized by carrying out dispersion treatment on a mixture obtained by mixing together an electrically conductive carbon material-dispersing agent consisting of a polymer having a pendant oxazoline group, an electrically conductive carbon material and a solvent.

Assignees

• Nissan Chemical Ind Ltd

Inventors

• Hatanaka Tatsuya
• Shibano Yuki
• Yoshimoto Takuji

Classifications

• C08L101/06

  containing oxygen atoms {(C08L101/025 takes precedence)} · CPC title

• H01M4/663 Primary

  containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title

• C08J2405/04

  Alginic acid; Derivatives thereof · CPC title

• C08L33/02 Primary

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof · CPC title

• H01G11/32

  Carbon-based · CPC title