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Liquid phase penetration sintering of garnet-type solid electrolyte LLZTO

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It is important to develop processes for manufacturing all-solid-state batteries to form ionic conductive interfaces at low temperatures. Here dense ceramics garnet-type lithium ion conductors, Li6.5La3Zr1.5Ta0.5O12 (LLZTO), were prepared at low temperatures (500°C–800°C) by reactive liquid phase penetration sintering (LPPS). In this process, pressed precursor oxides (La3Zr1.5Ta0.5O8.75) were exposed to the melt of lithium hydroxide monohydrate (LiOH·H2O). The prepared garnet-type lithium ion conductor prepared by LPPS at 800°C showed a total lithium ion conductivity of 2 × 10−4 S cm−1 at 25°C. The prepared sample has a garnet crystalline network structure containing amorphous LiOH. The activation energy required for lithium-ionic conduction of the LLZTO prepared by the LPPS method is 0.41 eV, which is consistent with that of samples prepared by the conventional solid phase sintering method at higher temperatures.

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Creator
  • Name
    吉田 尚生
    Organization
    National Institute for Materials Science
    Sub organization
    Research Center for Energy and Environmental Materials (GREEN)/Battery and Cell Materials Field/Battery Interface Control Group
    Role
    author
    Name
    桑田 直明
    ORCID
    https://orcid.org/0000-0002-0736-6967
    Organization
    National Institute for Materials Science
    Sub organization
    Research Center for Energy and Environmental Materials (GREEN)/Battery and Cell Materials Field/Battery Interface Control Group
    Role
    author
    Name
    長谷川 源
    Organization
    National Institute for Materials Science
    Sub organization
    Research Center for Energy and Environmental Materials (GREEN)/Battery and Cell Materials Field/Battery Interface Control Group
    Role
    author
    Name
    高田 和典
    Organization
    National Institute for Materials Science
    Sub organization
    Research Center for Energy and Environmental Materials (GREEN)/Battery and Cell Materials Field/Solid-State Battery Group
    Role
    author
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Date published
  • 24/11/2023
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  • Version of record (Published version)
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Funding reference
  • Funder identifier
    JPMXP0219207397
    Funder name
    MEXT
    Award title
    Materials Processing Science project ("Materealize")
    Funder identifier
    JPMJAL1301
    Funder name
    JST
    Award title
    ALCA-SPRING (Specially Promoted Research for Innovative Next Generation Batteries)
    Funder identifier
    21H02033
    Funder name
    JSPS
    Award title
    KAKENHI

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