J-STAGE Data
Browse

Sn vs. Ge: Effects of Elastic and Plastic Deformation of LGPS-type Solid Electrolytes on Charge-discharge Properties of Composite Cathodes for All-solid-state Batteries (Supporting Information)

Download (809.9 kB)
dataset
posted on 2025-04-30, 01:27 authored by Kenta WATANABE, Hideaki NAKAYAMA, Han-Seul KIM, Kazuhiro HIKIMA, Naoki MATSUI, Kota SUZUKI, Satoshi OBOKATA, Hiroyuki MUTO, Atsunori MATSUDA, Ryoji KANNO, Masaaki HIRAYAMA
The charge-discharge properties of all-solid-state batteries are affected by both chemical and physical factors. Physical issues mainly arise from the microstructure of the composites and the mechanical properties of the solid electrolytes themselves. However, physical issues have been investigated by focusing on the microstructures of the composites rather than the mechanical properties of the solid electrolytes themselves. In this study, composite cathodes with similar microstructures were fabricated using LiCoO2 as the active material and either Li9.81Sn0.81P2.19S12 or Li10GeP2S12 as the solid electrolyte. The composite with Li9.81Sn0.81P2.19S12 exhibited higher capacity retention and coulombic efficiency with increasing C-rates at 1.9–3.6 V vs. In-Li than that with Li10GeP2S12. Moreover, during charging–discharging at 1.9–3.8 V, the expansion and shrinkage of LiCoO2 were greater those at 1.9–3.6 V for the composite with Li9.81Sn0.81P2.19S12, leading to a higher capacity, capacity retention, and coulombic efficiency than those of the composite with Li10GeP2S12. These results are attributed to the high elastic modulus, high yield stress, and volumetrically-large elastic-deformability, which enable Li9.81Sn0.81P2.19S12 to reversibly deform while maintaining contact with LiCoO2, unlike Li10GeP2S12. These results demonstrate that solid electrolytes with low elastic moduli are not absolutely suitable for all-solid-state batteries, and that a high yield stress and volumetrically-large elastic-deformability are especially significant for reversible deformation. These findings provide new insights for the development of composite electrodes for all-solid-state batteries.

Funding

Development of solid state ionics materials based on nanoscale structures

Japan Society for the Promotion of Science

Find out more...

Development of high energy density and highly safe sulfide type all-solid-state battery

Japan Science and Technology Agency

Find out more...

History

Corresponding author email address

watanabe.k.c173@m.isct.ac.jp

Copyright

© 2025 The Author(s).

Common Metadata Elements (Only for the items supported by Japanese public funds)

  • This item includes dataset(s) related to publicly funded research (fill in all the fields below)

Usage metrics

    Electrochemistry

    Categories

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC