Method for producing anode for aqueous lithium ion secondary battery, and method for producing aqueous lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-2019074504-A1
Application number	US-201816047294-A
Country	US
Kind code	A1
Filing date	Jul 27, 2018
Priority date	Sep 4, 2017
Publication date	Mar 7, 2019
Grant date	—

Abstract

Disclosed is a method for producing an anode that can suppress decomposition of an aqueous electrolyte solution when the anode is applied to an aqueous lithium ion secondary battery, the method being for producing an anode for an aqueous lithium ion secondary battery, the method including: a first step of touching an anode that is electrochemically kept in a reduction or oxidation state to a nonaqueous electrolyte solution in which a lithium salt is dissolved, to form a film over a surface of the anode; and a second step of cleaning the anode, over the surface of which the film is formed.

First claim

1 . A method for producing an anode for an aqueous lithium ion secondary battery, the method comprising:
a first step of touching an anode that is electrochemically kept in a reduction or oxidation state to a nonaqueous electrolyte solution in which a lithium salt is dissolved, to form a film over a surface of the anode; and a second step of cleaning the anode, over the surface of which the film is formed.

2 . The method according to claim 1 , wherein
the nonaqueous electrolyte solution contains at least one organic compound selected from the group consisting of organic compounds each having a vinyl group, organosilicon compounds each including a carbon atom linked to a silicon atom that is next to the carbon atom, the carbon atom having a triple bond or a double bond, and organophosphorus compounds each including two or more oxygen atoms linked to a phosphorus atom that is next to the oxygen atoms.

3 . The method according to claim 2 , wherein
the organic compounds each having a vinyl group are at least one organic compound selected from the group consisting of vinylimidazole, vinylpyridine, methyl methacrylate, and styrene, the organosilicon compounds are at least one organic compound selected from the group consisting of 1,4-bis(trimethylsilyl)-1,3-butadiyne, trimethylsilylacetylene, trimethoxyphenylsilane, and triethoxyphenylsilane, and the organophosphorus compounds are at least one organic compound selected from the group consisting of (aminomethyl)phosphonic acid, and tris(2,2,2-trifluoroethyl) phosphate.

4 . The method according to claim 2 , wherein
at least one of the organic compounds each having a vinyl group is dissolved in the nonaqueous electrolyte solution, said at least one of the organic compounds each having a vinyl group having an aromatic ring including a nitrogen atom, and in the first step, temperature of the nonaqueous electrolyte solution is 50° C. to 70° C.

5 . The method according to claim 4 , wherein
the organic compounds each having a vinyl group are at least one organic compound selected from the group consisting of vinylimidazole, and vinylpyridine.

6 . The method according to claim 1 , wherein the anode includes Li 4 Ti 5 O 12 as an anode active material.

7 . A method for producing an aqueous lithium ion secondary battery, the method comprising:
producing an anode according to the method of claim 1 ; producing a cathode; producing an aqueous electrolyte solution; and storing the anode, the cathode, and the aqueous electrolyte solution in a battery case.

Assignees

• Toyota Motor Co Ltd

Inventors

• Tojigamori Takeshi
• Suyama Hiroshi

Classifications

• H01M4/0452 Primary

  from solutions · CPC title

• H01M10/38

  Construction or manufacture · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title