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Description:

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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• Creative Commons BY Attribution 4.0 International
  

Keyword: Solid electrolyte, Liquid phase, Garnet, Low-temperature sintering

Date published: 2023-11-24

Publisher: Elsevier

Journal:

• SOLID STATE IONICS (ISSN: 01672738) vol. 403 116408

Funding:

• MEXT JPMXP0219207397 (Materials Processing Science project ("Materealize") )
• JST JPMJAL1301 (ALCA-SPRING (Specially Promoted Research for Innovative Next Generation Batteries))
• JSPS 21H02033 (KAKENHI)

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1016/j.ssi.2023.116408

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Updated at: 2024-01-05 22:12:07 +0900

Published on MDR: 2023-11-28 13:30:45 +0900