Revealing the dynamic temperature of the cathode catalyst layer inside proton exchange membrane fuel cell by experimental measurements and numerical analysis

Wang, Qianqian; Tang, Fumin; Li, Xiang; Zheng, Jim P.; Hao, Liang; Cui, Guomin; Ming, Pingwen

doi:10.1016/j.cej.2023.142286

Cited by 11 publications

(1 citation statement)

References 60 publications

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“…There are mainly three transmission resistances during the local transmission of oxygen in the cathode catalytic layer. These include the ionomer film interface transmission resistance (R ion,int ), the intra-ion film diffusion resistance (R eff ion ), and the interfacial transmission resistance near the platinum surface due to limited adsorption on the platinum surface (R eff Pt,int ) [19,20] (the process is shown in Figure 2). Therefore, r local can be expressed by the following formula:…”

Section: Cathodic Oxygen Transport Processmentioning

confidence: 99%

Experimental and Numerical Simulation Study of Oxygen Transport in Proton Exchange Membrane Fuel Cells at Intermediate Temperatures (80 °C–120 °C)

Zhang,

Xiao

et al. 2024

Membranes

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Investigating the oxygen transport law within the Membrane Electrode Assembly at intermediate temperatures (80–120 °C) is crucial for enhancing fuel cell efficiency. This study analyzed the resistance to oxygen transport within the Membrane Electrode Assembly at intermediate temperatures using limiting current density and electrochemical impedance spectroscopy. The study findings reveal that, as temperature progressively increases, the Ostwald ripening effect leads to a 34% rise in the local oxygen transport resistance (Rlocal) in relation to the pressure-independent resistance (Rnp) within the cathode catalytic layer. Concurrently, the total transport resistance (Rtotal) decreases from 27.8% to 37.5% due to an increase in the gas diffusion coefficient and molecular reactivity; additionally, there is a decrease in the amount of liquid water inside the membrane electrode. A three-dimensional multiphysics field steady-state model was also established. The model demonstrates that the decrease in oxygen partial pressure can be mitigated effectively by increasing the back pressure at intermediate temperatures to ensure the cell’s performance.

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Section: Cathodic Oxygen Transport Processmentioning

confidence: 99%