The invention relates to a preparation method of a high-temperature
proton conductor
composite material, which is characterized in that sulfonated
triphenylphosphine salt is added into polybenzimidazole after the polybenzimidazole is dissolved in a
solvent to obtain membrane
casting solution, the membrane
casting solution is poured onto a glass membrane
casting plate to be dried for 24 hours at the temperature of 60 DEG C and then to be dried for 4 hours at the temperature of 100 DEG C, the glass membrane casting solution is steeped into a deionized water after being naturally cooled to the
room temperature, then the membrane is torn off, and a polybenzimidazole-type
high polymer material doped with sulfonated
triphenylphosphine salt high-temperature
proton conductor
composite material is obtained. The sulfonated
triphenylphosphine salt is used as the
doping material, so the PBI has good
proton conduction performance, and the sulfonated triphenylphosphine salt not only can make the PBI be well blended with the
high polymer material, but also can improve the mechanical performance of the material. The
composite material can be used at the temperature of
room temperature to 180 DEG C, and the electric
conductivity of the composite material is within 0.08 to 0.2 S / cm. The composite material can be applicable to the high-temperature proton exchange membrane material and other proton conduction material of the fuel
cell, and also can be applicable to the fields such as the
electrolysis, the sensor, the electro-
luminescent material and the like.