CsH2PO4: Electrolyte for Intermediate Temperature Fuel Cells
This review paper discusses the temperature behavior and thermal event of cesium dihydrogen phosphate (CsH2PO4) in both ambient and high pressure atmosphere. A complete transition from the room-temperature to a high-temperature of CsH2PO4 (monoclinic to cubic phase) occurs between 230 to 240 °C, even in the absence of humid conditions and the superprotonic transition precedes the onset of the dehydration/chemical decomposition of the title compound. Decomposition or dehydration can be avoided by either keeping the sample under a H2O-saturated atmosphere, or subjecting the sample to a pressure of 1.0 ± 0.2 GPa.
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
H. C. Teo et al., "CsH2PO4: Electrolyte for Intermediate Temperature Fuel Cells", Advanced Materials Research, Vols. 239-242, pp. 2492-2498, 2011