Method for manufacturing a solid battery and solid battery

The method of forming electrodes with an inorganic electrolyte and binder coating, followed by thermal decomposition and controlled pressing, addresses the detachment and cracking issues in solid-state batteries, enhancing reliability and performance.

JP7870909B2Active Publication Date: 2026-06-08OSAKA RES INST OF IND SCI & TECH +1
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
OSAKA RES INST OF IND SCI & TECH
Filing Date
2021-06-18
Publication Date
2026-06-08

AI Technical Summary

Technical Problem

Existing methods for manufacturing solid-state batteries face issues such as exposure of active material layers during lamination, leading to detachment and cracking, which can cause short circuits and contamination, and there is a need for improved reliability, especially in applications like automobiles where safety and flexibility are critical.

Method used

A method involving forming positive and negative electrodes on current collectors, applying a coating layer with an inorganic solid electrolyte and binder, stacking them with the coating layer in between, and thermally decomposing the binder to form a laminate, followed by pressing under controlled conditions to prevent damage and enhance reliability.

Benefits of technology

This method prevents damage to solid-state batteries during manufacturing and use, improving their reliability and performance by enhancing ion conductivity and reducing interfacial resistance.

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Patent Text Reader

Abstract

To provide a method capable of preventing damage to a solid-state battery resulting from manufacture or use and increasing reliability of the solid-state battery.SOLUTION: There is provided a method of manufacturing a solid-state battery including: a positive electrode formation step of forming a positive electrode on a positive electrode current collector; a negative electrode formation step of forming a negative electrode on a negative electrode current collector; a coating layer formation step of forming a coating layer that includes an inorganic solid electrolyte and a binder, the coating layer coating an exposed surface of at least one of the positive electrode and the negative electrode; and a laminate formation step of forming a laminate including an electrolyte layer by laminating the positive electrode and the negative electrode so as to sandwich the coating layer between the positive electrode and the negative electrode.SELECTED DRAWING: None
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