Study on Aging Mechanism of Membrane Electrode Assembly in Stationary Power Generation Fuel Cell with Variable Load Condition

The frequent off design operation of fuel cell is the main reason for the reduction of system life. From the physical point of view, the transient of current load under variable operating conditions will cause frequent changes in reaction gas pressure, pressure, temperature and humidity. This leads to irreversible damage to the material itself. From the chemical aspect, it will cause voltage change, lead to irreversible damage of the material itself, and lead to poor battery durability. The study on the attenuation mechanism of PEMFC membrane electrode under different working conditions lays a foundation for the subsequent research of attenuation machine, and is of great significance to promote the commercialization of fuel cell.