Seeds & Needs Seminar 2016. Jan.28(Thu.)13:40-14:15 C

Takashi Teranishi

Assistant Professor
Department of Applied Chemistry, Graduate School of Natural Science and Technology
Okayama University

Secondary battery with nano-ferroelectrics polarization assisted ultrahigh rate capability

Demand for the development of the automotive batteries with high charge-discharge rate capability is being increased for more excellent acceleration and better fuel economy. We have been drastically improved the high charge-discharge rate capability, i.e., power density, for the lithium ion battery which has relatively large energy density (~200Wh/kg) by introducing ferroelectric polarization assist into the Li redox reaction at cathodes. We have developed the active material with its surface decorated by BaTiO3 based ferroelectric nano particles as an artificial solid electrolyte interface, SEI. The achieved discharge capacity was 108 mAh/g at charge-discharge rate of 20C (1C=160mA/g, 3 minutes for full charge-discharge) and this value was 12.5 times as large as the bare LiCoO2

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