Method of manufacturing lithium ion battery device and lithium ion battery device

Patent metadata

Field	Value
Publication number	US-2019148778-A1
Application number	US-201816157638-A
Country	US
Kind code	A1
Filing date	Oct 11, 2018
Priority date	Nov 10, 2017
Publication date	May 16, 2019
Grant date	—

Abstract

An object of the present invention is to provide a method of manufacturing a high capacity lithium ion battery device by safe and simple doping operation. A method of manufacturing a lithium ion battery device comprising a positive electrode and a negative electrode which are laminated with each other, wherein an active material used on the positive electrode is a sulfur-based active material having a total sulfur content of not less than 50% by mass measured by an elementary analysis, the method comprising: a step of forming through-holes penetrating in a thickness direction of the positive electrodes and the negative electrodes, a step of laminating the positive electrodes with the negative electrode and disposing a lithium ion feeding source on at least one side of a laminating direction, and a step of allowing lithium derived from the lithium ion feeding source to be carried on the positive electrode and the negative electrode.

First claim

What is claimed is:

1 . A method of manufacturing a lithium ion battery device comprising positive electrodes and negative electrodes which are laminated with each other, wherein an active material used on the positive electrodes is a sulfur-based active material having a total sulfur content of not less than 50% by mass measured by an elementary analysis, the method comprising:
a step of forming, on the positive electrodes and the negative electrodes, through-holes penetrating in a thickness direction thereof, a step of laminating the positive electrodes and the negative electrodes and disposing a lithium ion feeding source on at least one side of a laminating direction thereof, and a step of allowing lithium derived from the lithium ion feeding source to be carried on the positive electrodes or the negative electrodes.

2 . The method of manufacturing a lithium ion battery device of claim 1 , wherein a diameter of openings of the through-holes formed on the positive electrodes and the negative electrodes is 0.05 mm or more and a rate of a hole area is 1.0% or more.

3 . The method of manufacturing a lithium ion battery device of claim 1 , wherein the positive electrodes and the negative electrodes are laminated so that the through-holes formed on the positive electrodes are aligned with the through-holes formed on the negative electrodes.

4 . The method of manufacturing a lithium ion battery device of claim 1 , wherein the active material used on the positive electrodes comprises a carbon-sulfur structure having peaks at around 500 cm −1 , 1,250 cm −1 , and 1,450 cm −1 of a Raman shift in a Raman spectrum.

5 . The method of manufacturing a lithium ion battery device of claim 1 , wherein the negative electrodes have a layer composed of a carbon material, a silicon material, a tin alloy material or a material produced by compounding thereof.

6 . A lithium ion battery device comprising positive electrodes and negative electrodes which are laminated with each other, wherein an active material used on the positive electrodes is a sulfur-based active material having a total sulfur content of not less than 50% by mass measured by an elementary analysis, wherein through-holes penetrating in a laminating direction of the positive electrodes and the negative electrodes are formed thereon, and lithium derived from a lithium ion feeding source disposed on at least one side of a laminating direction is carried on the positive electrodes and the negative electrodes.

Assignees

• Sumitomo Rubber Ind

Inventors

• Kubo Tatsuya
• Chujo Fumiya
• Yamano Akihiro
• Morishita Masanori
• Sakai Tetsuo

Classifications

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/608

  containing heterocyclic rings · CPC title

• H01M4/0416

  involving impregnation with a solution, dispersion, paste or dry powder (H01M4/0438 takes precedence) · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title