Development of Nanoprotonics Materials Based on Three Dimensional Hydrogen Bonding Networks

Several kinds of hydrogen sulfate mhs_4 (M=Cs， K, Na，nh_4)和WPA were mechanochemically milled to synthesize highly proton conducting xmhs_4 （100-x）nahso_4 -WPA composites, xmhs_4·（100-x） WPA(M=Cs， K，nh_4) with x=90-95 composites showed high proton conductivities in a wide temperature range underdry conditions. Chemical interactions via ion-exchange and hydrogen bond between xhs_4 and WPA wereconfirmed from structural studies. Furthermore，the anhydrous proton conductivity of the mhs_4 -WPA composites was well correlated with theirestimated hydrogen bonding distanceindicating that reduction of the hydrogen bonding distance in the mhs_4 -WPA composites is在proton hopping to achieve anhydrous high proton conductivity. Inorganic-organiccomposite electrolytes were fabricated from cshso_4 -WSiA and polybenzimidazole(PBI) for application在medium temperature fuel cells. The mechanochemically synthesized Cs-WSiA composites are a mechanochemically synthesized Cs-WSiA composites are apromising material to achieve high electrochemical properties in the mediate fuel cells。

Several kinds of hydrogen sulfate MHSO_4(M=Cs, K, Na, NH_4) and WPA were mechanochemically milled to synthesize highly proton conducting xMHSO_4・(100-x) WPA(mol%) composites. Except NaHSO_4-WPA composites, xMHSO_4・(100-x) WPA(M=Cs, K, NH_4) with x=90-95 composites showed high proton conductivities in a wide temperature range under dry conditions. Chemical interactions via ion-exchange and hydrogen bond between XHSO_4 and WPA were confirmed from structural studies. Furthermore, the anhydrous proton conductivity of the MHSO_4-WPA composites was well correlated with their estimated hydrogen bonding distance, indicating that reduction of the hydrogen bonding distance in the MHSO_4-WPA composites is significant in the proton hopping to achieve anhydrous high proton conductivity. Inorganic-organic composite electrolytes were fabricated from CsHSO_4-WSiA and polybenzimidazole(PBI) for application in medium temperature fuel cells. The mechanochemically synthesized Cs-WSiA composites are a promising material to achieve high electrochemical properties in the intermediate fuel cells.