High-rate performance of ferroelectric BaTiO3-coated LiCoO2 for Li-ion batteries

Takashi Teranishi, Yumi Yoshikawa, Ryo Sakuma, Hideki Hashimoto, Hidetaka Hayashi, Akira Kishimoto, Tatsuo Fujii

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The high charge-discharge rate characteristics of composite cathodes consisting of ferroelectric BaTiO3 (BT)-coated LiCoO2 (LC), synthesized via a simple sol-gel route, were evaluated, and the rate showed stepwise increases to as high as 5C. The LC-BT composite cathode annealed at 600°C, LC-BT-600, notably retained high capacities, i.e., 122 mAh/g at 30 cycles, 5C and 99 mAh/g at 60 cycles, 5C. These capacities corresponded to 83% and 67% of the initial values and were as high as 158% and 245% of the capacities of bare LC over the same cycles, respectively. The ferroelectricity of the coated BT contributed to the improvement in high-rate performance.

Original languageEnglish
Article number143904
JournalApplied Physics Letters
Volume105
Issue number14
DOIs
Publication statusPublished - Oct 6 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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