Cold sintering for Li1.5Al0.5Ge1.5(PO4)3 using LiNO3-LiOH as a transient solvent

The cold sintering process (CSP) is an innovative technique to densify ceramic powders at ultralow temperatures by applying uniaxial pressure and using a transient solvent. However, obtaining dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) ceramics, which have high ionic conductivity, by CSP has been a challenging subject, because incongruent dissolution from the powder to a solvent can happen during CSP, and that deteriorates the grain boundary. In this study, LiNO3-LiOH salt is used as the transient solvent to suppress the incongruent dissolution. LAGP ceramics densified by the CSP at 220 °C and 400 MPa for 5 h have no damage at the grain boundary. As the result, the total ionic conductivity reaches 1.9 × 10^(-5) S cm^(-1), which is the highest value ever reported among LAGP ceramics prepared by CSP only using inorganic materials.

Files

Metadata

Work Title Cold sintering for Li1.5Al0.5Ge1.5(PO4)3 using LiNO3-LiOH as a transient solvent
Access
Open Access
Creators
  1. Kenji Takashima
  2. Yoshiki Iwazaki
  3. Clive A. Randall
Keyword
  1. Low-temperature sintering
  2. Solid-state batteries
  3. Solid electrolyte
  4. Lithium aluminium germanium phosphate
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Japanese Journal of Applied Physics
Publication Date December 2, 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.35848/1347-4065/ac33cf
Deposited August 02, 2022

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Added Takashima-JJAP-Dec2021.pdf
  • Added Creator Kenji Takashima
  • Added Creator Yoshiki Iwazaki
  • Added Creator Clive A. Randall
  • Published
  • Updated Work Title Show Changes
    Work Title
    • Cold sintering for Li<sub>1.5</sub>Al<sub>0.5</sub>Ge<sub>1.5</sub>(PO<sub>4</sub>)<sub>3</sub>using LiNO<sub>3</sub>-LiOH as a transient solvent
    • Cold sintering for Li1.5Al0.5Ge1.5(PO4)3 using LiNO3-LiOH as a transient solvent
  • Updated Keyword, Description, Publication Date Show Changes
    Keyword
    • Low-temperature sintering , Solid-state batteries, Solid electrolyte, Lithium aluminium germanium phosphate
    Description
    • <p>The cold sintering process (CSP) is an innovative technique to densify ceramic powders at ultralow temperatures by applying uniaxial pressure and using a transient solvent. However, obtaining dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) ceramics, which have high ionic conductivity, by CSP has been a challenging subject, because incongruent dissolution from the powder to a solvent can happen during CSP, and that deteriorates the grain boundary. In this study, LiNO3-LiOH salt is used as the transient solvent to suppress the incongruent dissolution. LAGP ceramics densified by the CSP at 220 °C and 400 MPa for 5 h have no damage at the grain boundary. As the result, the total ionic conductivity reaches 1.9 × 10-5 S cm-1, which is the highest value ever reported among LAGP ceramics prepared by CSP only using inorganic materials. </p>
    • <p>The cold sintering process (CSP) is an innovative technique to densify ceramic powders at ultralow temperatures by applying uniaxial pressure and using a transient solvent. However, obtaining dense Li1.5Al0.5Ge1.5(PO4)3 (LAGP) ceramics, which have high ionic conductivity, by CSP has been a challenging subject, because incongruent dissolution from the powder to a solvent can happen during CSP, and that deteriorates the grain boundary. In this study, LiNO3-LiOH salt is used as the transient solvent to suppress the incongruent dissolution. LAGP ceramics densified by the CSP at 220 °C and 400 MPa for 5 h have no damage at the grain boundary. As the result, the total ionic conductivity reaches 1.9 × 10^(-5) S cm^(-1), which is the highest value ever reported among LAGP ceramics prepared by CSP only using inorganic materials. </p>
    Publication Date
    • 2021-12-01
    • 2021-12-02
  • Updated