TY - JOUR
T1 - A surface-supporting method for an anode material of Li4Ti5O12via an epitaxial thin film approach
AU - Yasuhara, Sou
AU - Yasui, Shintaro
AU - Teranishi, Takashi
AU - Hoshina, Takuya
AU - Tsurumi, Takaaki
AU - Itoh, Mitsuru
N1 - Funding Information:
This study was partially supported by JSPS KAKENHI Grants-in-Aid for Scientific Research (A) (M.I., 20H00314) and (B) (Sh.Y., 19H02426, T.T., 18H01707, 21H01625), for Challenging Research (Exploratory) (Sh.Y., 18K19126), and for Research Activity Start-up (So.Y., 20K22549), and by the MEXT Elements Strategy Initiative to Form a Core Research Center, and by Collaborative Research Project of Laboratory for Materials and Structures, Tokyo Tech., Murata Science Foundation and by Project of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development MEXT.
Publisher Copyright:
© 2021 The Japan Society of Applied Physics.
PY - 2021/11
Y1 - 2021/11
N2 - High-speed rechargeability is essential for next-generation secondary batteries. Introducing a surface-supporting material deposited on a cathode material accelerates Li-ion motions between an electrode-electrolyte interface by an electric field concentration at a supporting material-cathode-electrolyte (triple-phase) interface (TPI). In addition, a high relative permittivity material was found to be a promising supporting material with which to reinforce the electric field concentration at TPIs. However, the TPI's effects on anode materials remains to be revealed. To demonstrate those effects, we prepared CeO2 or BaTiO3 micropads deposited on Li4Ti5O12 epitaxial thin films. Compared with the cathodes, CeO2 micropads deposited on Li4Ti5O12 film showed the best performance at a high C-rate. Because the rate-determining step of Li4Ti5O12 epitaxial thin films is inner diffusion, reinforcing the surface electric field by the deposition of a low relative permittivity materials could promote high C-rate performance even in anode materials.
AB - High-speed rechargeability is essential for next-generation secondary batteries. Introducing a surface-supporting material deposited on a cathode material accelerates Li-ion motions between an electrode-electrolyte interface by an electric field concentration at a supporting material-cathode-electrolyte (triple-phase) interface (TPI). In addition, a high relative permittivity material was found to be a promising supporting material with which to reinforce the electric field concentration at TPIs. However, the TPI's effects on anode materials remains to be revealed. To demonstrate those effects, we prepared CeO2 or BaTiO3 micropads deposited on Li4Ti5O12 epitaxial thin films. Compared with the cathodes, CeO2 micropads deposited on Li4Ti5O12 film showed the best performance at a high C-rate. Because the rate-determining step of Li4Ti5O12 epitaxial thin films is inner diffusion, reinforcing the surface electric field by the deposition of a low relative permittivity materials could promote high C-rate performance even in anode materials.
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U2 - 10.35848/1347-4065/ac15a8
DO - 10.35848/1347-4065/ac15a8
M3 - Article
AN - SCOPUS:85112865631
SN - 0021-4922
VL - 60
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - SF
M1 - SFFB11
ER -