Enhancement of Ultrahigh Rate Chargeability by Interfacial Nanodot BaTiO 3 Treatment on LiCoO 2 Cathode Thin Film Batteries

Sou Yasuhara, Shintaro Yasui, Takasi Teranisi, Keisuke Chajima, Yumi Yoshikawa, Yutaka Majima, Tomoyasu Taniyama, Mitsuru Itoh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Nanodot BaTiO 3 supported LiCoO 2 cathode thin films can dramatically improve high-rate chargeability and cyclability. The prepared BaTiO 3 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 + ) 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 3 is smaller than that without nanodot BaTiO 3 . The decomposition of the organic solvent electrolyte can prevent the fabrication of a solid electrolyte interface around the triple-phase interface. Li + 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 + paths lead to excellent chargeability and cyclability.

Original languageEnglish
Pages (from-to)1688-1694
Number of pages7
JournalNano Letters
Volume19
Issue number3
DOIs
Publication statusPublished - Mar 13 2019

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electric batteries
Cathodes
Phase interfaces
cathodes
Thin films
augmentation
Electrolytes
thin films
Solid electrolytes
solid electrolytes
electrolytes
Permittivity
permittivity
Organic solvents
finite element method
Ions
Decomposition
decomposition
Finite element method
Fabrication

Keywords

  • BaTiO
  • cyclability
  • high-rate chargeability
  • Li-ion battery
  • thin-film battery

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Enhancement of Ultrahigh Rate Chargeability by Interfacial Nanodot BaTiO 3 Treatment on LiCoO 2 Cathode Thin Film Batteries . / Yasuhara, Sou; Yasui, Shintaro; Teranisi, Takasi; Chajima, Keisuke; Yoshikawa, Yumi; Majima, Yutaka; Taniyama, Tomoyasu; Itoh, Mitsuru.

In: Nano Letters, Vol. 19, No. 3, 13.03.2019, p. 1688-1694.

Research output: Contribution to journalArticle

Yasuhara, Sou ; Yasui, Shintaro ; Teranisi, Takasi ; Chajima, Keisuke ; Yoshikawa, Yumi ; Majima, Yutaka ; Taniyama, Tomoyasu ; Itoh, Mitsuru. / Enhancement of Ultrahigh Rate Chargeability by Interfacial Nanodot BaTiO 3 Treatment on LiCoO 2 Cathode Thin Film Batteries In: Nano Letters. 2019 ; Vol. 19, No. 3. pp. 1688-1694.
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