Solid electrolyte, method for manufacturing a solid electrolyte, and battery

A solid electrolyte with a specific composition and production method enhances lithium ion transport and stability by using a lithium salt, carbonate-based solvent, and crosslinked polyether, addressing the limitations of existing technologies in stability and concentration.

JP7883507B2Active Publication Date: 2026-07-01LINTEC CORP
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Patent Information

Application Number
JP2023549480
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-09-21
Filing Date
2022-09-12
Publication Date
2026-07-01
Estimated Expiration
2042-09-12

AI Technical Summary

Technical Problem

Existing solid electrolytes using ionic liquid electrolytes have insufficient lithium ion transport rate and stability with respect to lithium metal, and gel-like electrolytes face challenges in achieving high lithium salt concentration due to high viscosity, leading to inadequate stability and cycle performance.

Method used

A solid electrolyte comprising a lithium salt, carbonate-based solvent, metal oxide particles, and an ion-conducting polymer with a crosslinked polyether, formulated within specific mass and molar ratios, is produced through mixing and ultraviolet irradiation to enhance lithium ion transportability, ionic conductivity, and stability with respect to lithium metal.

Benefits of technology

The solution results in a solid electrolyte with improved lithium ion transportability, ionic conductivity, and stability, facilitating film formation and minimizing leakage while maintaining high lithium salt concentration.

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Abstract

Provided is a solid electrolyte which comprises an electrolytic solution comprising a lithium salt and a carbonate-based solvent, metal oxide particles, and an ion-conductive polymer, in which the ion-conductive polymer comprises a crosslinked product of a crosslinkable polyether, and the content of the electrolytic solution is 87% by mass to 93% by mass inclusive and the content of the ion-conductive polymer is 7% by mass to 13% by mass inclusive in which the total content of the electrolytic solution and the ion-conductive polymer is 100% by mass.
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Citation Information

Patent Citations

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    JP1994140052A

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    JP1997306543A

  • Pseudo solid electrolyte, and all-solid lithium secondary battery arranged by use thereof

    JP2017059432A

  • Electrolyte for lithium metal battery and lithium metal battery including the same

    US20190198923A1