10.1021/acs.nanolett.8b04690.s001
Sou Yasuhara
Sou
Yasuhara
Shintaro Yasui
Shintaro
Yasui
Takashi Teranishi
Takashi
Teranishi
Keisuke Chajima
Keisuke
Chajima
Yumi Yoshikawa
Yumi
Yoshikawa
Yutaka Majima
Yutaka
Majima
Tomoyasu Taniyama
Tomoyasu
Taniyama
Mitsuru Itoh
Mitsuru
Itoh
Enhancement of Ultrahigh Rate Chargeability by Interfacial
Nanodot BaTiO<sub>3</sub> Treatment on LiCoO<sub>2</sub> Cathode Thin
Film Batteries
American Chemical Society
2019
Ultrahigh Rate Chargeability
electrolyte
concentration
chargeability
dielectric
Interfacial Nanodot BaTiO 3 Treatment
cyclability
BaTiO 3 nanodot
LiCoO 2 cathode
triple-phase interface
material
nanodot BaTiO 3
Film Batteries Nanodot BaTiO 3
nm
LiCoO 2 Cathode
2019-02-13 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Enhancement_of_Ultrahigh_Rate_Chargeability_by_Interfacial_Nanodot_BaTiO_sub_3_sub_Treatment_on_LiCoO_sub_2_sub_Cathode_Thin_Film_Batteries/7732592
Nanodot BaTiO<sub>3</sub> supported LiCoO<sub>2</sub> cathode thin
films can dramatically improve high-rate chargeability and cyclability.
The prepared BaTiO<sub>3</sub> nanodot is <3 nm in height and 35
nm in diameter, and its coverage is <5%. Supported by high dielectric
constant materials on the surface of cathode materials, Li ion (Li<sup>+</sup>) can intercalate through robust Li paths around the triple-phase
interface consisting of the dielectric, cathode, and electrolyte.
The current concentration around the triple-phase interface is observed
by the finite element method and is in good agreement with the experimental
data. The interfacial resistance between the cathode and electrolyte
with nanodot BaTiO<sub>3</sub> is smaller than that without nanodot
BaTiO<sub>3</sub>. The decomposition of the organic solvent electrolyte
can prevent the fabrication of a solid electrolyte interface
around the triple-phase interface. Li<sup>+</sup> paths may be created
at non solid electrolyte interface covered regions by the strong current
concentration originating from high dielectric constant materials
on the cathode. Robust Li<sup>+</sup> paths lead to excellent chargeability
and cyclability.