Battery manufacturing method and battery

摘要

A negative-electrode active material layer having an uneven pattern is formed on a surface of a copper foil as a negative-electrode current collector by applying an application liquid by a nozzle-scan coating method. Subsequently, an application liquid containing a polymer electrolyte material is applied by a spin coating method, thereby forming a solid electrolyte layer in conformity with the uneven pattern. Subsequently, an application liquid is applied by a doctor blade method, thereby forming a positive-electrode active material layer whose lower surface conforms to the unevenness and whose upper surface is substantially flat. A thin and high-performance all-solid-state battery can be produced by laminating an aluminum foil as a positive-electrode current collector before the application liquid is cured.

主权项

1. A battery manufacturing method, comprising:
a first active material layer forming step of forming a first active material layer having a specified uneven pattern by applying a first application liquid containing a first active material on a surface of a base material to form a laminated body; an electrolyte layer forming step of forming an electrolyte layer having unevenness substantially in conformity with said uneven pattern on said surface of said laminated body, which is formed by laminating the first active material layer on the surface of the base material, by applying a second application liquid containing a polymer electrolyte onto a surface of the laminated body, at a side where the first active material layer is formed, after the first active material layer forming step; and a second active material layer forming step of forming a second active material layer having a substantially flat surface opposite to a surface touching the electrolyte layer by applying a third application liquid containing a second active material on a surface of the electrolyte layer after the electrolyte layer forming step, wherein the first active material layer forming step is executed by a nozzle-scan method, in which a nozzle having a plurality of dispense openings arranged in a row in a first direction each of which dispenses a fixed amount of the first application liquid is moved relative to the surface of the base material so that the first application liquid is applied onto the base material in stripes arranged in a second direction orthogonal to the first direction, thereby forming a plurality of separated stripes of the first active material by one said movement of the nozzle.