[10p-N406-1~18] 9.4 Thermoelectric conversion

[10p-N406-13] Origin of the material dependence of the temperature coefficient of the redox potential in Prussian blue analogues

〇Yutaka Moritomo¹, Yuma Yoshida¹, Dai Inoue¹, Iwaizumi Hiroki¹, Kobayashi Shintaro², Shogo Kawaguchi², Shibata Takayuki³ (1.University of Tsukuba, 2.JASRI, 3.TUMST)

Keywords:Prussian blue analogue, tertiary battery, energy harvest

The temperature coefficients (α) of the redox potentials of six Prussian blue analogues were determined. α was widely distributed from -1.18 mV / K (Cd-PBA) to 0.57 mV / K (Co-PBA). Furthermore, we found that (1) the sign of α is dominated by redox sites and (2) the magnitude of | α | increases with crystallographic Na sites. These emprical rules can be explained by the configuration entropy of Na.