J-STAGE Data
Browse

Kinetics of Interfacial Lithium-ion Transfer between a Graphite Negative Electrode and a Li2S-P2S5 Glassy Solid Electrolyte (Supporting Information)

Download (93.92 kB)
dataset
posted on 2022-02-22, 06:07 authored by Danni YU, Meiqi HUANG, Yuto MIYAHARA, Kohei MIYAZAKI, Akitoshi HAYASHI, Masahiro TATSUMISAGO, Takeshi ABE, Tomokazu FUKUTSUKA
All-solid-state lithium-ion batteries that use sulfide solid electrolytes have attracted much attention due to their high safety and wide electrochemical window. In this study, highly oriented pyrolytic graphite (HOPG) and 75Li2S-25P2S5 (mol%) glass were used as a model graphite negative electrode and a sulfide solid electrolyte, respectively. Interfacial lithium-ion transfer between 75Li2S-25P2S5 glass and the HOPG electrode was studied by AC impedance spectroscopy measurements. The activation energy of the interfacial lithium-ion transfer was estimated to be around 37 kJ mol−1, which was much smaller than that at the interface between organic liquid electrolytes and HOPG electrode, indicating that the lithium-ion transfer at the interface between 75Li2S-25P2S5 glass and HOPG electrode proceeded quite rapidly. Furthermore, surface deposition of TiO2 and surface oxidation on HOPG electrodes were performed using the atomic layer deposition (ALD) method. Interfacial lithium-ion transfer between 75Li2S-25P2S5 glass and ALD-modified-HOPG electrodes was also investigated. The activation energies of the interfacial lithium-ion transfer were slightly higher than that of HOPG, but the resistance of the charge-transfer process was lower, indicating that the affinity of the HOPG electrode for the glass electrolyte was improved by surface modification.

Funding

Advanced Low Carbon Technology Research and Development Program

History

Corresponding author email address

myzkohei@elech.kuic.kyoto-u.ac.jp

Copyright

© 2022 The Author(s)

Usage metrics

    Electrochemistry

    Categories

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC