Low-Temperature High-Rate Capabilities of Lithium Batteries via Polarization-Assisted Ion Pathways

Takasi Teranisi, Naoto Katsuji, Keisuke Chajima, Sou Yasuhara, Masahiro Inohara, Yumi Yoshikawa, Shintaro Yasui, Hidetaka Hayashi, Akira Kishimoto, Mitsuru Itoh

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Abstract

On-board vehicle applications dictate the need for improved low-temperature power densities of rechargeable batteries. Integration of high-permittivity artificial dielectric solid electrolyte interfaces (SEIs) into the lithium ion battery architecture is a promising path to satisfy this need. The relationship between the permittivity of various artificial dielectric SEIs and the resulting high-rate capability at low temperatures is investigated. Room-temperature studies reveal a weak relationship between these variables. However, at low temperatures, the correlation between the larger permittivity of the dielectric SEIs and the greater high-rate capabilities of the cells is striking. The high-rate capabilities for pulsed laser deposition-synthesized cathode thin films with various BaTiO3 (BTO) SEIs covering configurations are evaluated. A remarkable improvement in the high-rate capability is observed for LiCoO2 (LCO) modified with dot BTOs, while the rate capability for planar BTO (fully covered LCO) is weakened significantly. A series of experimental results prove that a large polarization, P, in the dielectric SEIs intensified with permittivity accelerates interfacial charge transfer near the dielectrics–LCO–electrolyte triple junction.

Original languageEnglish
Article number1700413
JournalAdvanced Electronic Materials
Volume4
Issue number4
DOIs
Publication statusPublished - Apr 1 2018

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Keywords

  • artificial solid electrolyte interfaces
  • ferroelectrics
  • high-rate capability
  • Li ion batteries
  • polarization

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Teranisi, T., Katsuji, N., Chajima, K., Yasuhara, S., Inohara, M., Yoshikawa, Y., Yasui, S., Hayashi, H., Kishimoto, A., & Itoh, M. (2018). Low-Temperature High-Rate Capabilities of Lithium Batteries via Polarization-Assisted Ion Pathways. Advanced Electronic Materials, 4(4), [1700413]. https://doi.org/10.1002/aelm.201700413