Y. Yamamoto
Research Subjects
Y. Yamamoto has a total of 7 co-authors. Here are the top co-authors by number of shared publications:
- F. Kobayashi
Graduate School of Engineering, Kanagawa University 2 , Yokohama 220-8686
1 shared publication - H. He
AMAYA Co., Ltd. 1 , Koshigaya, Saitama 343-0822
1 shared publication - H. Kurihara
Saitama Prefecture Industrial Technology Center (SAITEC) 4 , Saitama 333-0844
1 shared publication - Hajime Shirai
Graduate School of Engineering, Kanagawa University 2 , Yokohama 220-8686
1 shared publication - T. Ohno
AMAYA Co., Ltd. 1 , Koshigaya, Saitama 343-0822
1 shared publication - Takayuki Watanabe
Department of Chemical Engineering, Kyushu University, Fukuoka 819-0395, Japan
1 shared publication
Latest Publications
- 11 August 2026
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 140 (6)
Electrostatic rectification of Li+ transport in amorphous TiO x thin films grown by mist CVD
Amorphous metal oxide interlayers are widely used to stabilize Li+ transport at battery interfaces, yet the underlying transport mechanisms remain unclear. Here, Li+ transport in amorphous TiOx (a-TiOx) thin films prepared by mist chemical vapor deposition was investigated by comparing electrochemical lithiation with concentration-driven Li+ insertion induced by LiPF6 exposure. Electrochemical lithiation enables redox-assisted, dynamically activated Li+ diffusion accompanied by partial Ti4+ reduction, whereas LiPF6 exposure results in diffusion-limited Li+ transport without significant electronic reduction. Depth-resolved glow discharge optical emission spectroscopy and spectroscopic ellipsometry clearly distinguish these two regimes. In addition, dielectric contrast between the electrolyte, a-TiOx, and graphite is proposed to generate internal electric fields that directionally bias Li+ transport. A Drude-like sub-gap optical response originates from field-induced polarization and localized electronic states rather than metallic conduction. These results highlight the importance of dielectric-field effects in amorphous oxide interlayers for improving interfacial stability and rate performance in lithium-based batteries.
- 11 August 2026
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 140 (6)
Electrostatic rectification of Li+ transport in amorphous TiO x thin films grown by mist CVD
Amorphous metal oxide interlayers are widely used to stabilize Li+ transport at battery interfaces, yet the underlying transport mechanisms remain unclear. Here, Li+ transport in amorphous TiOx (a-TiOx) thin films prepared by mist chemical vapor deposition was investigated by comparing electrochemical lithiation with concentration-driven Li+ insertion induced by LiPF6 exposure. Electrochemical lithiation enables redox-assisted, dynamically activated Li+ diffusion accompanied by partial Ti4+ reduction, whereas LiPF6 exposure results in diffusion-limited Li+ transport without significant electronic reduction. Depth-resolved glow discharge optical emission spectroscopy and spectroscopic ellipsometry clearly distinguish these two regimes. In addition, dielectric contrast between the electrolyte, a-TiOx, and graphite is proposed to generate internal electric fields that directionally bias Li+ transport. A Drude-like sub-gap optical response originates from field-induced polarization and localized electronic states rather than metallic conduction. These results highlight the importance of dielectric-field effects in amorphous oxide interlayers for improving interfacial stability and rate performance in lithium-based batteries.