Abstract
Understanding internal phenomena of porous electrode layer in Polymer electrolyte fuel cells （PEFCs） and Lithium-ion batteries
（LIBs） has been required to reduction various resistance of electrochemical reaction and mass transport. However, it is difficult to
know the internal condition under in-situ operating condition. Thus, the numerical simulation and digital transformation method
are applicable to solve this problem. Porous structure and morphology in the porous electrode layer with nanometer to micrometer
scale can be designed with these approaches. In this review, we provide an importance of the design of porous electrode layer and an
overview for the simulation and digital transformation method of PEFC and LIB.
