Manufacturing method for all-solid-state batteries

Abstract

The present invention aims to provide a new method for manufacturing all-solid-state batteries. [Solution] The manufacturing method 1b for this all-solid-state battery includes: (1) a step of molding a positive electrode 17 with a mixture containing a positive electrode active material 27 and a first solid electrolyte 26; (2) a step of molding a solid electrolyte portion 15 with a second solid electrolyte 25; (3) a step of applying plasma treatment to the surface of the molded positive electrode 17 on the solid electrolyte portion 15 side; and (4) a step of stacking the positive electrode 17, the solid electrolyte portion 15, and the negative electrode 14 in this order and pressing them.

Claims

1. A method for manufacturing an all-solid-state battery, (1) A step of forming a positive electrode with a mixture containing a positive electrode active material and a first solid electrolyte, (2) A step of molding the solid electrolyte portion with a second solid electrolyte, (3) A step of applying plasma treatment to the surface of the solid electrolyte portion of the positive electrode after molding, (4) A step of stacking the positive electrode, the solid electrolyte portion, and the negative electrode in this order and pressing them together. A method for manufacturing all-solid-state batteries.

2. The positive electrode active material and the first solid electrolyte are oxides. The second solid electrolyte is a sulfide. A method for manufacturing an all-solid-state battery according to claim 1.

3. The above steps (1) and (2) are carried out in a first environment with a dew point of -60°C or lower. The above step (3) is carried out in a second environment of approximately 100 Pa or less. (5) The process includes transporting a sample between the first environment and the second environment, The aforementioned step (5) includes storing the sample in a vacuum-sealed vessel. A method for manufacturing an all-solid-state battery according to claim 1.

4. The positive electrode active material comprises lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), and oxygen (O). The first solid electrolyte comprises lithium (Li), aluminum (Al), titanium (Ti), phosphorus (P), and oxygen (O). The second solid electrolyte comprises lithium (Li), phosphorus (P), sulfur (S), and chlorine (Cl). A method for manufacturing an all-solid-state battery according to claim 1.

5. The positive electrode active material is LiNi 0.5 Mn 0.2 Co 0.3 O 2 And, The first solid electrolyte is Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 and is The previous second solid electrolyte is Li 6 PS 5 Cl is A method for manufacturing an all-solid-state battery according to claim 1.

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