title: Mechanochemically synthesized CsH2PO4-H3PW12O40composites as proton-conducting electrolytes for fuel cell systems in a dry atmosphere.
abstract: Cesium dihydrogen phosphate (CsH2PO4, CDP) and dodecaphosphotungstic acid (H3PW12O40·nH2O, WPA·nH2O) were mechanochemically milled to synthesize CDP-WPA composites. The ionic conductivities of these composites were measured by an ac impedance method under anhydrous conditions. Despite the synthesis temperatures being much lower than the dehydration and phase-transition temperatures of CDP under anhydrous conditions, the ionic conductivities of the studied composites increased significantly. The highest ionic conductivity of 6.58×10-4Scm-1was achieved for the 95CDP·5WPA composite electrolyte at 170 °C under anhydrous conditions. The ionic conduction was probably induced in the percolated interfacial phase between CDP and WPA. The phenomenon of high ionic conduction differs for the CDP-WPA composite and pure CDP or pure WPA under anhydrous conditions. The newly developed hydrogen interaction between CDP and WPA supports anhydrous proton conduction in the composites.
authors.affiliation: Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
authors.forename: Song-Yul
authors.initials: SY
authors.lastname: Oh
authors.affiliation: Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan; Department of Engineering Physics, Institute Technology of Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia.
authors.forename: Evan K
authors.initials: EK
authors.lastname: Insani
authors.affiliation: Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
authors.forename: Van H
authors.initials: VH
authors.lastname: Nguyen
authors.affiliation: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
authors.forename: Go
authors.initials: G
authors.lastname: Kawamura
authors.affiliation: Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan; Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Muto
authors.affiliation: Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
authors.forename: Mototsugu
authors.initials: M
authors.lastname: Sakai
authors.affiliation: Department of Environmental and Life Sciences, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan; Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi, 441-8580, Japan.
authors.forename: Atsunori
authors.initials: A
authors.lastname: Matsuda
keywords: advanced composite; cesium dihydrogen phosphate; dry fuel cell; inorganic solid acid; phosphotungstic acid