[21p-438-1~12] 9.4 Thermoelectric conversion

[21p-438-12] Thermal efficiency of battery-type thermocell fabricated with Prussian blue analogues

〇Takayuki Shibata¹, Yuya Fukuzumi², Yutaka Moriotomo^2,3 (1.NIT, Gunma College, 2.Univ.of Tsukuba, 3.TREMS, Univ. of Tsukuba)

Keywords:Thermal power generation, Prussian blue analogues, Sodium-ion secondary battery

We investigated the thermal efficiency of a sodium-ion secondary battery type thermocell against the various temperature difference (ΔT) between low temperature (TL = 282 K) and high temperature (TH = 292 - 338 K). This thermocell consists of two kinds of Prussian blue analogues, which are Na_xMn[Fe(CN)₆]_0.833.5H₂O and Na_xCo[Fe(CN)₆]_0.92.9H₂O, with the difference in the thermal coefficient (= dV/dT). In heat cycle between 282 K and 322 K, the thermal efficiency of the device was evaluated 1.5 %.This value reaches 13 % of the Carnot efficiency (12 %).