The compression deformation of the GDL is caused by assembly force. To determine the optimal assembly force for improving fuel cell performance
the GDL deformation
current density distribution
and oxygen concentration distribution of the PEMFC under different assembly forces were analyzed based on experimental and numerical simulation methods. The PEMFC performance was comprehensively evaluated by considering multiple parameters such as pressure drop
power density
and current density distribution. The results show that the assembly force resulted in nonlinear stress-strain compression of the GDL under the rib
with compression reaching 61 % at the assembly force of 2.0 MPa. The power density of PEMFC at 1.0 MPa increased by 4.57 % compared to the results of 0.5 MPa under 0.95 A cm. Moreover
the overall performance of PEMFC at 1.0 MPa was the best by using the entropy weighting method.
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