All-solid-state battery including a porous composite membrane

Patent metadata

Field	Value
Publication number	US-2024250269-A1
Application number	US-202318237287-A
Country	US
Kind code	A1
Filing date	Aug 23, 2023
Priority date	Jan 20, 2023
Publication date	Jul 25, 2024
Grant date	—

Abstract

Disclosed is an anodeless all-solid-state battery including a porous composite membrane in place of an anode current collector.

First claim

What is claimed is:

1 . An all-solid-state battery comprising:
a composite membrane comprising a first surface and a second surface; a first solid electrolyte layer disposed on the first surface of the composite membrane; a first cathode active material layer disposed on the first solid electrolyte layer; a first cathode current collector disposed on the first cathode active material layer; a second solid electrolyte layer disposed on the second surface of the composite membrane; a second cathode active material layer disposed on the second solid electrolyte layer; and a second cathode current collector disposed on the second cathode active material layer, wherein: the composite membrane comprises a conductive material; the composite membrane comprises pores; the composite membrane comprises a first layer configured to form the first main surface, a second layer configured to form the second surface, and an intermediate layer interposed between the first layer and the second layer; and the first layer and the second layer each comprises metal powder configured to be alloyable with lithium.

2 . The all-solid-state battery of claim 1 , wherein the conductive material comprises a linear carbon material.

3 . The all-solid-state battery of claim 2 , wherein the linear carbon material comprises carbon nanofibers, carbon nanotubes, vapor-grown carbon fibers, or combinations thereof.

4 . The all-solid-state battery of claim 2 , wherein a length of the linear carbon material is about 0.01 m to 1 μm.

5 . The all-solid-state battery of claim 2 , wherein a diameter of the linear carbon material is about 1 nm to 200 nm.

6 . The all-solid-state battery of claim 2 , wherein:
the linear carbon material forms a net shape so that the composite membrane comprises pores; and lithium is stored in the pores when the all-solid-state battery is charged.

7 . The all-solid-state battery of claim 1 , wherein porosity of the composite membrane is about 0.1% to 50%.

8 . The all-solid-state battery of claim 1 , wherein a thickness of the composite membrane is about 1 m to 200 μm.

9 . The all-solid-state battery of claim 1 , wherein:
a thickness of the first layer is about 10% to 40% of an overall thickness of the composite membrane; a thickness of the second layer is about 10% to 40% of the overall thickness of the composite membrane; and a thickness of the intermediate layer is about 20% to 80% of the overall thickness of the composite membrane.

10 . The all-solid-state battery of claim 1 , wherein the metal powder comprises one or more selected from the group consisting of aluminum (Al), zinc (Zn), indium (In), silver (Ag), gold (Au), magnesium (Mg), silicon (Si), bismuth (Bi), germanium (Ge), platinum (Pt), antimony (Sb), and tin (Sn).

11 . The all-solid-state battery of claim 1 , wherein a median particle diameter D50 of the metal powder is about 0.01 μm to 1 μm.

12 . The all-solid-state battery of claim 1 , wherein the first layer comprises:
an amount of about 50 wt % to 99 wt % of the porous conductive material; an amount of about 0.1 wt % to 45 wt % of the metal powder; and an amount of about 0.1 wt % to 10 wt % of a binder, based on the total weight of the first layer.

13 . The all-solid-state battery of claim 1 , wherein the second layer comprises:
an amount of about 50 wt % to 99 wt % of the porous conductive material; an amount of about 0.1 wt % to 45 wt % of the metal powder; and an amount of about 0.1 wt % to 10 wt % of a binder, based on the total weight of the second layer.

14 . The all-solid-state battery of claim 1 , wherein the intermediate layer comprises:
an amount of about 90 wt % to 99.9 wt % of the porous conductive material; and an amount of about 0.1 wt % to 10 wt % of a binder, based on the total weight of the intermediate layer.

15 . A vehicle comprising an all-solid-state battery of claim 1 .

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Choi Hong Suk
• Kim Sang Wan
• Kang Hee Soo
• Lim Jae Min
• Kim Seon Hwa

Classifications

• B60L50/60

  using power supplied by batteries (in combination with fuel cells B60L50/75) · CPC title

• H01M50/491

  Porosity · CPC title

• H01M50/48

  characterised by the material · CPC title

• H01M50/474

  characterised by their position inside the cells · CPC title

• H01M10/052

  Li-accumulators · CPC title