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dc.contributor.authorBotez, Cristian E.
dc.contributor.authorMartinez, Israel
dc.contributor.authorPrice, Alex D.
dc.date.accessioned2022-07-25T16:32:55Z
dc.date.available2022-07-25T16:32:55Z
dc.date.issued2022-07-17
dc.identifierdoi: 10.3390/ma15144969
dc.identifier.citationMaterials 15 (14): 4969 (2022)
dc.identifier.urihttps://hdl.handle.net/20.500.12588/1069
dc.description.abstractUsing powder X-ray diffraction and AC impedance spectroscopy, we have found that the superprotonic CsH2PO4 (CDP) phase is stable at T = 250 °C when sealed in different volumes (15 mL and 50 mL) of dry air or inert gasses. Under these conditions, CDP’s proton conductivity stays constant at 2.5 × 10−2 S·cm−1 for at least 10 h. On the other hand, removing the gas from the chamber leads to a sharp, two-order-of-magnitude drop in the proton conductivity. Our data show no evidence of a self-generated water vapor atmosphere in the chamber, and the gas pressure at T = 250 °C is several orders of magnitude below the pressures previously used to stabilize CDP’s superprotonic phase. These results demonstrate that hermetically sealing CDP in small gas-filled volumes represents a new method to stabilize the superprotonic phase, which opens new paths for large-scale applications of phosphate-based solid acids as fuel cell electrolytes.
dc.titleStability of Superprotonic CsH2PO4 Hermetically Sealed in Different Environments
dc.date.updated2022-07-25T16:32:56Z
dc.description.departmentPhysics and Astronomy


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