Solid-state battery

By optimizing the film thickness ratio between the outer edge and the center of the electrode layer, the problems of high internal resistance and short-circuit risk in solid-state batteries were solved, resulting in safer and more efficient battery performance.

CN115461908BActive Publication Date: 2026-06-16MURATA MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MURATA MFG CO LTD
Filing Date
2021-04-26
Publication Date
2026-06-16

AI Technical Summary

⚠Technical Problem

Existing solid-state batteries suffer from high internal resistance and short-circuit risks, especially at the ends of the electrode layers where short circuits are easily caused.

⚗Method used

By controlling the film thickness ratio between the outer edge and the central part of the electrode layer, ensuring that 1.05 ≤ (maximum film thickness of the outer edge) / (average film thickness of the central part) < 1.34, and (average film thickness of the solid electrolyte layer) / (average film thickness of the central part) > 0.35, the structure of the electrode layer is optimized to reduce internal resistance and prevent short circuits.

🎯Benefits of technology

This reduces internal resistance while effectively preventing short circuits between electrode layers, thus improving the safety and performance of solid-state batteries.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a solid-state battery capable of reducing internal resistance and preventing short circuit. The solid-state battery of the present application has one or more battery constitution units including a positive electrode layer and a negative electrode layer laminated with a solid electrolyte layer interposed therebetween, the positive electrode layer and the negative electrode layer have a central portion and an outer edge portion surrounding the central portion in plan view, at least one of the positive electrode layer and the negative electrode layer satisfies 1.05 ≤ (maximum value of film thickness of the outer edge portion) / (average film thickness of the central portion) < 1.34, and (average film thickness of the solid electrolyte layer) / (average film thickness of the central portion) > 0.35.
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