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Erschienen in: Journal of Sol-Gel Science and Technology 3/2022

14.05.2022 | Invited Paper: Sol–gel and hybrid materials for dielectric, electronic, magnetic and ferroelectric applications

Crystalline precursor derived from Li3PS4 and ethylenediamine for ionic conductors

verfasst von: Takuya Kimura, Akane Ito, Takumi Nakano, Chie Hotehama, Hiroe Kowada, Atsushi Sakuda, Masahiro Tatsumisago, Akitoshi Hayashi

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2022

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Abstract

Liquid-phase syntheses of sulfide materials are attractive for the mass production of solid electrolytes for all-solid-state batteries. In liquid-phase synthesis, the precursor of the solid electrolyte is obtained. The precursors are important for producing electrolytes of the same quality because they decompose into electrolytes by heat treatment. However, only a few studies have focused on the formation mechanism and structure of precursors. This study proposes a formation mechanism for Li3PS4 during liquid-phase synthesis using ethylenediamine (EDA) as a solvent and clarifies the crystal structure of Li3PS4·NH2CH2CH2NH2 (Li3PS4·EDA). Raman spectroscopy and nuclear magnetic resonance revealed that intermediate P2S62− units were generated in the EDA solution. Crystal structure analysis of Li3PS4·EDA showed that the terminal nitrogen atom of EDA coordinates with two lithium atoms. Ionic conductivity of Li3PS4·EDA was 2.8 × 10−9 S cm−1 at 25 °C. The analysis of precursors of solid electrolytes provides insight into the behavior of solvent molecules as ligands in the synthesis of sulfide electrolytes.

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Metadaten
Titel
Crystalline precursor derived from Li3PS4 and ethylenediamine for ionic conductors
verfasst von
Takuya Kimura
Akane Ito
Takumi Nakano
Chie Hotehama
Hiroe Kowada
Atsushi Sakuda
Masahiro Tatsumisago
Akitoshi Hayashi
Publikationsdatum
14.05.2022
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2022
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-022-05824-x

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