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Microstructure and Li-Ion Conductivity of Hot-Pressed Cubic Li7La3Zr2O12

Journal of the American Ceramic Society, 2015-04, Vol.98 (4), p.1209-1214 [Peer Reviewed Journal]

2015 The American Ceramic Society ;ISSN: 0002-7820 ;EISSN: 1551-2916 ;DOI: 10.1111/jace.13455

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  • Title:
    Microstructure and Li-Ion Conductivity of Hot-Pressed Cubic Li7La3Zr2O12
  • Author: David, Isabel N. ; Thompson, Travis ; Wolfenstine, Jeff ; Allen, Jan L. ; Sakamoto, Jeff
  • Viyas, B.
  • Subjects: Aluminum ; Ceramics ; Correlation ; Density ; Grain boundaries ; Hot pressing ; Ionic conductivity ; Microstructure ; Transport
  • Is Part Of: Journal of the American Ceramic Society, 2015-04, Vol.98 (4), p.1209-1214
  • Description: The effect of hot‐pressing temperature on the microstructure and Li‐ion transport of Al‐doped, cubic Li7La3Zr2O12 (LLZO) was investigated. At fixed pressure (62 MPa), the relative density was 86%, 97%, and 99% when hot‐pressing at 900°C, 1000°C, and 1100°C, respectively. Electrochemical impedance spectroscopy showed that the percent grain‐boundary resistance decreased with increasing hot‐pressing temperature. Hot pressing at 1100°C resulted in a total conductivity of 0.37 mS/cm at room temperature where the grain boundaries contributed to 8% of the total resistance; one of the lowest grain‐boundary resistances reported. We believe hot pressing is an appealing technique to minimize grain‐boundary resistance and enable correlations between LLZO composition and bulk ionic conductivity.
  • Publisher: Blackwell Publishing Ltd
  • Language: English
  • Identifier: ISSN: 0002-7820
    EISSN: 1551-2916
    DOI: 10.1111/jace.13455
  • Source: Alma/SFX Local Collection
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