Comprehensive analysis of galvanostatic charge method for fuel cell degradation diagnosis

摘要: Abstract Cyclic voltammetry and linear sweep are the most commonly used diagnosis methods to estimate internal statement of fuel cell stack. However, both can only be applied in a single cell. There is lack suitable situ for multi-burl The galvanostatic charge method (GSC) very convenient method, which stack calculate electrochemical active surface area (ECSA), double-layer capacitance, hydrogen crossover current. there not enough experiments analyze adaption GSC or apply this degradation process. In study, we conducted validate accuracy under different test conditions, proposed new correction algorithm improve accuracy. Next, was performance process four-cell experimental results showed that estimated parameters exactly coincide with standard values. Additionally, analysis stack, ECSA reduction four direct reason degradation. Moreover, assumptions carbon corrosion were validated by material experiments. About 5° decrease contact angle gas diffusion layer (GDL) cathode catalyst observed worst