[17p-419-1~10] 6.3 Oxide electronics

[17p-419-7] Temperature dependence of redox potential of P2-type Na_xCoO₂

〇Yuya Fukuzumi¹, Wataru Kobayashi^1,2,3, Yutaka Moritomo^1,2,3 (1.Grad. Sch. Pure and Appl. Sci., Univ. Tsukuba, 2.Fac. Pure and Appl. Sci., Univ. Tsukuba, 3.CiRfSE, Univ. Tsukuba)

Keywords:thermoelectric conversion, ion secondary battery

We fabricated a thermo-cell as a new device to convert thermal energy into electric one. The device is similar to an ion secondary battery. Output voltage depends on temperature dependences of redox potentials of electrodes of the device. As a candidate for the electrode, we have investigated P2-Na_xCoO₂. Temperature dependence of the redox potential for various sodium compositions (x) in P2-Na_xCoO₂ will be reported.