Battery

• US 10,186,731 B2
• Filed: 06/08/2017
• Issued: 01/22/2019
• Est. Priority Date: 06/22/2016
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Asano, Tetsuya
• Primary Examiner(s): Walls, Cynthia K
• Application Number:
  US15/616,934
• Publication Number:
  US 20170373346A1
• Time in Patent Office: 593 Days
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/366 as layered products
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A battery is provided which includes: a first electrode body which is a porous body having voids and which is formed by connecting first electrode active material grains containing a first electrode active material to each other; a first cover layer which covers a surface of the first electrode body and which contains a solid electrolyte; and a second cover layer which covers a surface of the first cover layer and which contains a second electrode active material. In the battery described above, a space presents at the position of the void of the first electrode body covered with the first cover layer and the second cover layer.

Claims

1. A battery comprising:

a first electrode body which is a porous body having voids and which is formed by connecting first electrode active material grains containing a first electrode active material to each other,

a first cover layer which covers a surface of the first electrode body and which contains a solid electrolyte,

a second cover layer which covers a surface of the first cover layer and which contains a second electrode active material, and

a space which presents at the position of the void of the first electrode body covered with the first cover layer and the second cover layer.

2. The battery according to claim 1,

wherein the first electrode body has a frame formed by connecting the first electrode active material grains to each other in a mesh shape.

3. The battery according to claim 1,

wherein the width of the space is larger than the thickness of the second cover layer.

4. The battery according to claim 1, further comprising:

a first current collector electrically connected to the first electrode body; and

a first electrode active material layer containing the first electrode active material and provided on a surface of the first current collector,

wherein at least one of the first electrode active material grains is in contact with the first electrode active material layer.

5. The battery according to claim 4,

wherein at least a part of the at least one of the first electrode active material grains is embedded in the first electrode active material layer.

6. The battery according to claim 4, further comprising:

a solid electrolyte layer containing the solid electrolyte,

wherein a surface of the first electrode active material layer which is not in contact with the first electrode active material grains is covered with the solid electrolyte layer.

7. The battery according to claim 1, further comprising:

a second current collector electrically connected to the second cover layer; and

a second electrode active material layer containing the second electrode active material and provided on a surface of the second current collector,

wherein at least a part of the second cover layer is in contact with the second electrode active material layer.

8. The battery according to claim 7,

wherein the at least a part of the second cover layer is embedded in the second electrode active material layer.

9. The battery according to claim 1, further comprising:

a second current collector electrically connected to the second cover layer; and

a third electrode active material layer containing a third electrode active material and provided on a surface of the second current collector,

wherein the third electrode active material is a material forming the same electrode as the electrode formed of the second electrode active material and is a material different from the second electrode active material, and

at least a part of the second cover layer is in contact with the third electrode active material layer.

10. The battery according to claim 9,

wherein the at least a part of the second cover layer is embedded in the third electrode active material layer.

11. The battery according to claim 1,

wherein the solid electrolyte is an inorganic solid electrolyte.