MS18-04 - Pressure Induced Phase Transition in CoSO4·H2O.

Martin Ende (University of Vienna, Department of Mineralogy and Crystallography, Austria)

Lithium ion batteries are required improvement in safety and high energy density, because of wide applications from small-sized electrical devices to large-sized power sources.  Especially, all solid state Li-ion batteries (LIB) using solid oxide electrolyte have attracted attention as next-generation batteries without inflammable organic liquid electrolytes.  Among many candidates of Li-ion conducting oxide materials as solid electrolyte for all solid state LIB, the garnet-type Li7La3Zr2O12 is most suitable because of both high Li-ion conductivity and wide electrochemical potential window.  We recently focused on the Ta-substituted Li7La3Zr2O12 materials having a relatively higher Li-ion conductivity at room temperature.  We synthesized sintered body and single crystal samples of Li6.5La3Zr1.5Ta0.5O12 [1-3], and determined precise structural and electrochemical properties.  A relationship between the detailed Li-ion arrangement in the garnet structure and the Li-ion conductivity will be presented.

This study was supported by the Advanced Low Carbon Technology Research and Development Program (ALCA-SPRING) from Japan Science and Technology Agency (JST).  ­



[1] H. Hamao, K. Kataoka, N. Kijima J. Akimoto, J. Ceram. Soc. Jpn., 124 (2016) 678.

[2] K. Kataoka and J. Akimoto, ChemElectroChem, 5 (2018) 2551.

[3] K. Kataoka, H. Nagata, J. Akimoto, Scientific Reports, 8 (2018) 9965.