The operating life of the PEFC is defined as the state at which the voltage has dropped by 10% of the initial value. (When the initial voltage of a single cell is 0.75 V, the operating life is defined as the time up to the point where the voltage drops to 0.675 V.)
Main factors of voltage drop
Durability evaluation tests on the four main factors of voltage drop
Accelerated degradation test
Accelerated degradation evaluation technique developed by the NEDO project to accurately forecast the operating life in a short period is used to evaluate the durability.
Long-term durability test
Osaka Gas uses the cell evaluation technology it has accumulated through its long efforts, exploiting it fully in current development efforts.