Evaluation of young’s modulus of Li2S–P2S5–P2O5 oxysulfide glass solid electrolytes

Atsutaka KATO; Motohiro NAGAO; Atsushi SAKUDA; Akitoshi HAYASHI; Masahiro TATSUMISAGO

doi:10.2109/jcersj2.122.552

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Evaluation of young’s modulus of Li₂S–P₂S₅–P₂O₅ oxysulfide glass solid electrolytes

Atsutaka KATO, Motohiro NAGAO, Atsushi SAKUDA, Akitoshi HAYASHI, Masahiro TATSUMISAGO

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Keywords: Young’s modulus, Oxysulfide glass, Solid electrolyte, All-solid-state battery, Hot press

JOURNAL FREE ACCESS

2014 Volume 122 Issue 1427 Pages 552-555

DOI https://doi.org/10.2109/jcersj2.122.552

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Abstract

Mechanical properties such as elastic modulus of solid electrolytes are important for all-solid-state batteries. To investigate the effects of a partial substitution of oxide for sulfide on Young’s modulus, 70Li₂S·(30 − x)P₂S₅·xP₂O₅ (mol %) (x = 0, 3 and 10) oxysulfide glasses were prepared and characterized. Young’s moduli were measured by ultrasonic pulse echo method for the dense pellets prepared by hot pressing at around glass transition temperature. The Young’s moduli of 70Li₂S·(30 − x)P₂S₅·xP₂O₅ glasses were 22–27 GPa and increased with an increase in the P₂O₅ content. The highest Young’s modulus in this report was 27 GPa for the glass with 10 mol % P₂O₅.

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