Mechanochemical synthesis of proton conductive composites derived from cesium dihydrogen phosphate and guanine

► Mechanochemical synthesis of CsH2PO4-C5H5N5O (CDP-Gn) composites as an electrolyte. ► Proton conductive electrolytes for the intermediate-temperature fuel cells. ► A development of a tautomerism of Gn and hydrogen bond between CDP and Gn.