Cathode substrate, high-capacity all-solid-state battery and method of manufacturing same

Patent metadata

Field	Value
Publication number	US-10177388-B2
Application number	US-201414906262-A
Country	US
Kind code	B2
Filing date	Apr 16, 2014
Priority date	Jul 19, 2013
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Provided are a cathode substrate, a high capacity all-solid-state battery, and a method for manufacturing the same. The cathode substrate includes a base in a mesh form and a cathode formed on the base, wherein the cathode is configured to overlap the base. The present invention may resolve a conventional problem of deterioration in battery efficiency, which has been caused by a long distance between an electrode and a cathode, and may produce a high capacity all-solid-state battery while suppressing or preventing an increase in the thickness of the cathode.

First claim

What is claimed is:

1. A method for manufacturing a cathode substrate; the method comprising:
a) preparing a base in a mesh form;
b) preparing a cathode slurry including a cathode active material, a solid electrolyte, and a conductive material;
c) applying the cathode slurry on the base to form a cathode; and
d) preliminarily drying the cathode slurry applied on the base in a temperature range of 50 to 120°C. and preliminarily compressing the cathode slurry to the base by pressing in a pressure range of lower than a pressure range of 700 to 1,200 kg/m 2 ; and
e) drying the cathode slurry that is preliminarily compressed to the base in a temperature range of 500 to 1,200°C. and compressing the cathode slurry to the base by pressing in the pressure range of 700 to 1,200kg/M 2 for 5 minutes to 2 hours.

2. The method of claim 1 , wherein the cathode slurry is formed by mixing the cathode active material, the solid electrolyte, and the conductive material with an organic solvent and a binder.

3. The method of claim 2 , wherein at least any one of LiCoO2, LiNiO2, LiMn2O4, LiMnO2, LiCoPO4, or a compound thereof is used as the cathode active material.

4. The method of claim 2 , wherein at least any one of an Li—La-metal-O system, an Li—B—O system, or an Li—P—O system, which is a crystalline electrolyte or an amorphous electrolyte, is used as the solid electrolyte.

5. An all-solid-state battery, comprising:
the cathode substrate produced by the method of claims 1 ;
an electrolyte layer formed on at least one surface of a cathode included in the cathode substrate;
an anode formed on the solid electrolyte; and
an anode current collector formed on the anode.

6. A method for manufacturing an all-solid-state battery, the method comprising:
preparing a cathode substrate produced by the method of claims 1 ;
forming an electrolyte layer on at least one surface of the cathode substrate;
forming an anode on the electrolyte layer; and
forming an anode current collector on the anode.

Assignees

• Univ Gachon Ind Acad Coop Found
• Gachon Univ Of Industry—Academic Cooperation Foundation

Inventors

• Yoon Young Soo
• Jee Seung Hyun
• Lee Seok Hee

Classifications

• H01M4/0416 Primary

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

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title