Kyoto University · Engineering
Professor Takeshi Abe's research lab specializes in solid-state ionics and electrochemical interfaces, focusing on lithium-ion transport mechanisms at electrode/electrolyte boundaries. The lab investigates interfacial charge transfer resistances and activation energies in complex systems involving ceramic, polymer, and liquid electrolytes, with an emphasis on understanding the role of solvent-solute interactions and interfacial energetics. Their work combines ac impedance spectroscopy with theoretical calculations to design high-performance solid-state batteries and ion-conductive materials. The research aims to optimize interfacial stability and ionic conductivity for next-generation energy storage devices.
Figures are computed from collected data and may differ slightly.
Solvated lithium-ion transfer at the interface between the graphite and electrolyte was investigated by ac impedance spectroscopy. Electrolytes consisting of 1 mol dissolved in 1,2-dimethoxyethane (DME) and dimethylsulfoxide (DMSO) were used. Cyclic voltammograms of highly oriented pyrolytic graphite in the above electrolytes showed that solvated lithium ion intercalation occurred below a potential of 1.5 V (vs. In 1 mol electrolyte, impedance spectra of graphite were measured at a potential of
In this study, lithium-ion transfer through the electrode/electrolyte interface was examined using a model interface composed of a lithium-ion-conductive ceramic and liquid electrolytes to focus on lithium-ion transfer. Lithium-ion transfer resistances at the interface and their activation energies were evaluated by impedance spectroscopy. The activation energies were quite large and consistent with the interaction between lithium-ion and solvents in an electrolyte as determined by a theoretical
Lithium-ion transfer at the interface between the lithium-ion-conductive ceramic of (LLT) and the polymer electrolyte of polyethylene oxide (PEO) complexed with was studied by ac impedance spectroscopy for the system of The impedance ascribed to ion transfer through the interface was observed. The resistance due to the lithium-ion transfer at the interface was larger than those through phases of LLT and and the temperature dependence of the interfacial resistances showed Arrhenius-type behavior.
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