Abstract
One of the technical problems for the commercialization of FCV is a sub-zero performance improvement. During 0℃ to -30℃, generation water in channel and GDL freezes. Therefore, gas supply is obstructed and diffusion overvoltage increases. The solution has been solved by the optimization of the purge condition and the improvement of the heater. On the other hand, under the extremely low temperature less than -30℃, the water even in polymer electrolyte membrane freeze, the conductivity of the proton decreases and the operation of PEFC cannot start. This problem does not have a solution. The key to the solution is to make clear the drop mechanism of the proton conductivity due to the solidification of the generation water. This paper investigates the transport property of the proton under sub-zero degree.
