IP Library Patent Application 18699136
Patent Application
App. No. 18/699,136

ANODE STRUCTURE FOR SECONDARY BATTERY AND SECONDARY BATTERY PROVIDED WITH SAME

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Quick Facts
Patent No.
US None
App. No.
18/699,136
Abstract

A negative electrode structure for a secondary battery ( 10 ) includes: a body ( 12 ) that is in a form of a foil or a thin plate and contains zinc as a base material; and a non-electron conductive film ( 11 ) provided on at least a first surface of the body ( 12 ). The film ( 11 ) is stretchable. The film ( 11 ) includes: an opening portion ( 13 ) formed to expose a portion of a first surface of the body ( 12 ); and an electrode reaction inhibiting portion ( 14 ) that surrounds the opening portion ( 13 ) and inhibits an electrode reaction in the body ( 12 ). The film ( 11 ) is attached to the body ( 12 ) in a liquid-tight manner.

Claims (21)

1 . A negative electrode structure for a secondary battery, comprising:

a body that is in a form of a foil or a thin plate and contains zinc as a base material; and

a non-electron conductive film provided on at least a first surface of the body,

wherein the film is stretchable,

the film includes:

an opening portion formed to expose a portion of the first surface of the body; and

an electrode reaction inhibiting portion that defines a perimeter of the opening portion and inhibits an electrode reaction in the body, and

the film is attached to the body in a liquid-tight manner.

2 . The negative electrode structure for a secondary battery according to claim 1 ,

wherein the body further contains bismuth.

3 . The negative electrode structure for a secondary battery according to claim 2 ,

wherein the body contains 100 ppm or more and 10000 ppm or less of bismuth based on mass.

4 . The negative electrode structure for a secondary battery according to any one of claims 1 to 3 ,

wherein the film has a thickness of 0.02 mm or more and 0.45 mm or less.

5 . The negative electrode structure for a secondary battery according to claim 1 ,

wherein the negative electrode structure also functions as a current collector.

6 . A secondary battery comprising the negative electrode structure for a secondary battery according to claim 1 .

7 . The secondary battery according to claim 6 ,

wherein a positive electrode is provided to oppose the film in the negative electrode structure,

a separator is provided between the positive electrode and the negative electrode structure, and

an electrolyte solution is present between the positive electrode and the negative electrode structure.

Assignments (3)
CHANGE OF NAME Recorded Nov 14, 2025
From: MITSUI MINING & SMELTING CO., LTD.
To: MITSUI KINZOKU COMPANY, LIMITED
Reel/Frame 073570/0734 →
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE ADDRESS PREVIOUSLY RECORDED AT REEL: 67021 FRAME: 0754. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT OF ASSIGNORS INTEREST. Recorded Apr 9, 2024
From: MORIMITSU, MASATSUGU; SAWAMOTO, HIROKI; KURUMA, TAKUYA; YAMAGUCHI, KYOHEI
To: THE DOSHISHA; MITSUI MINING & SMELTING CO., LTD.
Reel/Frame 067192/0092 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 5, 2024
From: MORIMITSU, MASATSUGU; SAWAMOTO, HIROKI; KURUMA, TAKUYA; YAMAGUCHI, KYOHEI
To: THE DOSHISHA; MITSUI MINING & SMELTING CO., LTD.
Reel/Frame 067021/0754 →