Lithium-ion conducting solid materials

A solid-state material with specific metal and halide compositions enhances lithium ion conductivity and stability, addressing the need for improved solid electrolytes in all-solid-state lithium batteries.

JP7768514B2Active Publication Date: 2025-11-12BASF SE +1
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Patent Information

Application Number
JP2022562077
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-04-09
Filing Date
2021-04-08
Publication Date
2025-11-12
Estimated Expiration
2041-04-08

AI Technical Summary

Technical Problem

There is a need for lithium ion conductors that exhibit suitable ionic conductivity and electrochemical stability for use as solid electrolytes in all-solid-state lithium batteries.

Method used

A solid-state material with a composition defined by the general formula Li 6+2*n-x-m*y M y PS 5+n-x X 1+x, where M is divalent or trivalent metals like Mg, Ca, Sr, Ba, Zn, Sc, La, Al, and Ga, and X is F, Cl, Br, I, is developed, which creates lithium vacancies for increased mobility and diffusion.

Benefits of technology

The material achieves ionic conductivities of 1 mS/cm or more at 25°C with negligible electrical conductivity, suitable for use as a solid electrolyte in all-solid-state lithium batteries.

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Abstract

A solid-state material having ionic conductivity for lithium ions, a method for making said solid-state material, a method for using said solid-state material as a solid electrolyte for an electrochemical cell, a solid-state structure selected from the group consisting of a cathode, an anode and a separator for an electrochemical cell comprising the solid-state material, and an electrochemical cell comprising such a solid-state structure are described.
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Citation Information

Patent Citations

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    CN110931846A

  • Ionically conductive compounds and related uses

    EP3407412A1

  • Method for producing sulfide solid electrolyte having argyrodite type crystal structure

    JP2019036536A

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    US8075865B2

  • Solid electrolyte, electrode for lithium ion battery, and lithium ion battery

    WO2020184464A1