Electrode mixture layer composition for nonaqueous electrolyte secondary battery, manufacturing method thereof and use therefor

Patent metadata

Field	Value
Publication number	US-2018108917-A1
Application number	US-201615561391-A
Country	US
Kind code	A1
Filing date	Mar 29, 2016
Priority date	Mar 30, 2015
Publication date	Apr 19, 2018
Grant date	—

Abstract

An electrode mixture layer composition for a nonaqueous electrolyte secondary battery contains an active material, water and a binder. The binder contains a crosslinked polymer of a monomer component including an ethylenically unsaturated carboxylic acid monomer, and a salt thereof. The crosslinked polymer is a polymer that is crosslinked with allyl methacrylate, and an amount of the allyl methacrylate used is 0.1 to 2.0 parts by weight relative to total 100 parts by weight of non-crosslinking monomers, and a content of the crosslinked polymer and salt thereof is 0.5% to 5.0% by weight of the active material.

First claim

1 . An electrode mixture layer composition for a nonaqueous electrolyte secondary battery, containing an active material, water and a binder, wherein
the binder contains a crosslinked polymer of a monomer component including an ethylenically unsaturated carboxylic acid monomer, and a salt thereof, the crosslinked polymer is a polymer that is crosslinked with allyl methacrylate, and an amount of the allyl methacrylate used is 0.1 to 2.0 parts by weight relative to total 100 parts by weight of non-crosslinking monomers, and a content of the crosslinked polymer and salt thereof is 0.5% to 5.0% by weight of the active material.

2 . The electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 1 , wherein the crosslinked polymer is a polymer that is crosslinked with allyl methacrylate and a polyfunctional allyl compound, and an amount of the allyl methacrylate and polyfunctional allyl compound is 0.1 to 3.0 parts by weight relative to total 100 parts by weight of the non-crosslinking monomers.

3 . The electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 1 , wherein a degree of neutralization of the crosslinked polymer is 20 to 100 mol %.

4 . A method of manufacturing an electrode mixture layer composition for a nonaqueous electrolyte secondary battery, the method comprising:
precipitation-polymerizing a monomer component including an ethylenically unsaturated carboxylic acid monomer and allyl methacrylate in an aqueous medium to obtain a crosslinked polymer; and mixing the crosslinked polymer with an active material and water to thereby manufacture an electrode mixture layer composition for a nonaqueous electrolyte secondary battery.

5 . A nonaqueous electrolyte secondary battery electrode comprising a mixture layer constituted of the electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 1 on a surface of a collector.

6 . A nonaqueous electrolyte secondary battery comprising: the nonaqueous electrolyte secondary battery electrode according to claim 5 ; a separator; and a nonaqueous electrolyte solution.

7 . The electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 2 , wherein a degree of neutralization of the crosslinked polymer is 20 to 100 mol %.

8 . A nonaqueous electrolyte secondary battery electrode comprising a mixture layer constituted of the electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 2 on a surface of a collector.

9 . A nonaqueous electrolyte secondary battery electrode comprising a mixture layer constituted of the electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 3 on a surface of a collector.

10 . A nonaqueous electrolyte secondary battery electrode comprising a mixture layer constituted of the electrode mixture layer composition for a nonaqueous electrolyte secondary battery according to claim 7 on a surface of a collector.

11 . A nonaqueous electrolyte secondary battery electrode comprising a mixture layer constituted of the electrode mixture layer composition for a nonaqueous electrolyte secondary battery produced by the method according to claim 4 on a surface of a collector.

12 . A nonaqueous electrolyte secondary battery comprising: the nonaqueous electrolyte secondary battery electrode according to claim 8 ; a separator; and a nonaqueous electrolyte solution.

13 . A nonaqueous electrolyte secondary battery comprising: the nonaqueous electrolyte secondary battery electrode according to claim 9 ; a separator; and a nonaqueous electrolyte solution.

14 . A nonaqueous electrolyte secondary battery comprising: the nonaqueous electrolyte secondary battery electrode according to claim 10 ; a separator; and a nonaqueous electrolyte solution.

15 . A nonaqueous electrolyte secondary battery comprising: the nonaqueous electrolyte secondary battery electrode according to claim 11 ; a separator; and a nonaqueous electrolyte solution.

Assignees

• Toagosei Co Ltd

Inventors

• Matsuzaki Hideo
• Saito Naohiko
• Matsunaga Morikatsu
• Kumagai Shinya

Classifications

• C08F220/06 Primary

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/622

  being polymers · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• C08F2/14

  Organic medium · CPC title