Grasping proton transport pathways and mecha-nisms is vital for the application of fuel cell technology.Herein,we screened four guanidinium organosulfonate charge-assisted hydro-gen-bonded organic frameworks(HOFs),nam...Grasping proton transport pathways and mecha-nisms is vital for the application of fuel cell technology.Herein,we screened four guanidinium organosulfonate charge-assisted hydro-gen-bonded organic frameworks(HOFs),namely,GBBS,G3TSPHB,G4TSP,and G6HSPB,which possess high hydrogen-bonded density proton transport networks shaped like nanotubes.These materials were prepared by self-assembly through charge-assisted interactions between guanidinium cations and organo-sulfonate anions,as well as by host-guest regulation.At 80℃ and 93%RH,the proton conductivity of GBBS,G3TSPHB,G4TSP,and G6HSPB can reach 4.56×10^(-2),2.55×10^(-2),4.01×10^(-2),and 10^(-1) cm^(-1),Doping G6HSPB into the Nafion matrix prepared composite membranes for testing the performance of fuel cells.At 80°C and 98%RH,the proton conductivity of 9%-G6HSPB@Nafion reached a maximum value of 1.14×10^(-1) S cm^(-1),which is 2.8 times higher than recast Nafion.The results showed that charge-assisted HOFs with high proton channel density have better proton transport properties,providing a reference for the design of highly proton-conducting materials.展开更多
基金supported by the National Natural Science Foundation of China(22075169)the Shaanxi Fundamental Science Research Project for Chemistry and Biology(22JHQ026)the Starting Grants from Shaanxi University of Science and Technology(2016QNBJ-11).
文摘Grasping proton transport pathways and mecha-nisms is vital for the application of fuel cell technology.Herein,we screened four guanidinium organosulfonate charge-assisted hydro-gen-bonded organic frameworks(HOFs),namely,GBBS,G3TSPHB,G4TSP,and G6HSPB,which possess high hydrogen-bonded density proton transport networks shaped like nanotubes.These materials were prepared by self-assembly through charge-assisted interactions between guanidinium cations and organo-sulfonate anions,as well as by host-guest regulation.At 80℃ and 93%RH,the proton conductivity of GBBS,G3TSPHB,G4TSP,and G6HSPB can reach 4.56×10^(-2),2.55×10^(-2),4.01×10^(-2),and 10^(-1) cm^(-1),Doping G6HSPB into the Nafion matrix prepared composite membranes for testing the performance of fuel cells.At 80°C and 98%RH,the proton conductivity of 9%-G6HSPB@Nafion reached a maximum value of 1.14×10^(-1) S cm^(-1),which is 2.8 times higher than recast Nafion.The results showed that charge-assisted HOFs with high proton channel density have better proton transport properties,providing a reference for the design of highly proton-conducting materials.
