[10a-N201-1~11] 9.4 Thermoelectric conversion

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[10a-N201-11] Temperature dependence of the Seebeck coefficient in ionic liquids

〇Ryo Inada¹, Konosuke Ochi¹, Yuki Hanamura¹, Hirokazu Tada¹ (1.Osaka Univ.)

Keywords:

ionic liquids,thermoelectric conversion,Soret effect

The temperature dependence of the Seebeck coefficient of the highly viscous ionic liquid C10MIMBF4 was measured. The Seebeck coefficient was as high as +1.7 mV/K at room temperature, but decreased with increasing temperature and reversed sign at about 60 ºC. The sign of the Seebeck coefficient reversed at about 60 °C. It is considered that the mechanism of ion diffusion changed as the viscosity decreased with increasing temperature. The monotonically decreasing Seebeck coefficient with temperature suggests that the thermal gradient is more dominant than the concentration gradient for ion diffusion due to the Soret effect.