Mechanochemically Prepared Li2S–P2S5–LiBH4 Solid Electrolytes with an Argyrodite Structure | Zendy

Atsushi Sakuda | Zendy; Akihiro Yamauchi | Zendy; So Yubuchi | Zendy; Naoto Kitamura | Zendy; Yasushi Idemoto | Zendy; Akitoshi Hayashi | Zendy; Masahiro Tatsumisago | Zendy

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Mechanochemically Prepared Li₂S–P₂S₅–LiBH₄ Solid Electrolytes with an Argyrodite Structure

Author(s) -

Atsushi Sakuda,

Akihiro Yamauchi,

So Yubuchi,

Naoto Kitamura,

Yasushi Idemoto,

Akitoshi Hayashi,

Masahiro Tatsumisago

Publication year - 2018

Publication title -

acs omega

Language(s) - English

Resource type - Journals

ISSN - 2470-1343

DOI - 10.1021/acsomega.8b00377

Subject(s) - fast ion conductor , materials science , electrolyte , crystal structure , lithium (medication) , phase (matter) , activation energy , ionic conductivity , solid solution , conductivity , halide , ion , crystal (programming language) , inorganic chemistry , crystallography , chemistry , metallurgy , electrode , endocrinology , medicine , organic chemistry , computer science , programming language

Solid electrolytes with compositions of (100 - x )(0.75Li 2 S·0.25P 2 S 5 )· x LiBH 4 (mol %, 0 ≤ x ≤ 100) were mechanochemically prepared from the 75Li 2 S·25P 2 S 5 (mol %) glass and LiBH 4 crystal. The samples with x ≥ 43 have crystalline phases and those with x ≤ 33 formed a glassy phase. The crystalline phase was identified as argyrodite Li 6 PS 5 (BH 4 ). The x = 50 sample formed a crystalline phase and demonstrated a high lithium-ion conductivity of 1.8 × 10 -3 S cm -1 at 25 °C with an activation energy of 16 kJ·mol -1 . The argyrodite-type crystal with a BH 4 - anion that occupies the halide site is a novel and promising solid electrolyte.

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