Lee, Sang Yeop Lee, Kwan-Soo Um, Sukkee 2024-01-20T23:34:42Z 2024-01-20T23:34:42Z 2021-09-03 2008-03 1738-494X https://pubs.kist.re.kr/handle/201004/133704 Interfacial contact resistance between gas diffusion layers (GDLs) and bipolar plates (BPs) has a substantial effect on the performance loss of polymer electrolyte fuel cells (PEFCs). Particularly during the final manufacturing process of a fuel cell stack, an externally applied clamping load determines the extent of electrical contact between those two solid components. In order to have the least electrical contact loss, it is highly necessary to keep all PEFC components close each other without causing structural failure of fuel cell stacks. In the present work, we investigated the effect of the clamping pressure on extrinsic properties such as porosity and permeability, which is closely related to mass transfer of reactants. Also, the variance of interfacial electrical resistance was analyzed as a function of the stack clamping pressure or the compressed GDL thickness, which reflects the external clamping load. Then with these experimentally obtained material properties of GDL, computational efforts were made to account for the effect of the clamping pressure on the fuel cell performance. English KOREAN SOC MECHANICAL ENGINEERS TRANSPORT MODEL The structural variation of the gas diffusion layer and a performance evaluation of polymer electrolyte fuel cells as a function of clamping pressure Article 10.1007/s12206-007-1211-6 1 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.22, no.3, pp.565 - 574 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 22 3 565 574 scie scopus kci 000254145300018 2-s2.0-49249128046 Engineering, Mechanical Engineering Article TRANSPORT MODEL polymer electrolyte fuel cells gas diffusion layer mass transfer clamping pressure electrical resistance