Electrochemical behavior of surface treated metal bipolar plates used in passive direct methanol fuel cell

摘要: Abstract Corrosion resistance performance of SS316L treated by passivation solution was investigated in a simulated environment the passive direct methanol fuel cell (DMFC). Electrochemical impedance spectroscopic (EIS) test showed that polarization untreated and were 1191 Ω cm2 9335 Ω cm2, respectively. The above result agreed with Tafel slope analysis potentiodynamic curves. Comparing DMFC anode working conditions, it observed corrosion current density as estimated 4000 s potentiostatic reduced from 38.7 μA cm−2 to 0.297 μA cm−2, meanwhile, densities cathode conditions 3.87 μA cm−2 0.223 μA cm−2, It indicated should be suitable both DMFCs. bipolar plates have been assembled single cell. A peak power 1.18 mW cm−2 achieved 1 M at ambient temperature.