Evaluation of young’s modulus of Li<sub>2</sub>S–P<sub>2</sub>S<sub>5</sub>–P<sub>2</sub>O<sub>5</sub> oxysulfide glass solid electrolytes

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  • KATO Atsutaka
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
  • NAGAO Motohiro
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
  • SAKUDA Atsushi
    Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST)
  • HAYASHI Akitoshi
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University
  • TATSUMISAGO Masahiro
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University

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

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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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