Study on water and oxygen transfer characteristics of HT-PEM fuel cells

He, Hongbin; Peng, Haisi; Li, Guangchao

doi:10.1016/j.heliyon.2023.e19832

Cited by 1 publication

(1 citation statement)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simulations can be used to better analyze the internal conditions of the cell. He [15] modeled a high-temperature fuel cell by combining the equations of mechanics and Butler−Volmer to simulate the trend of oxygen concentration in different diffusion layers. Xia et al [16] developed a three-dimensional non-isothermal model to investigate the effect of the ratio of the flow channel (CH) to the rib width on the diffusion of reactive gases in porous electrodes at an operating temperature of 180 • C. The results showed that increasing the ratio helps to improve the gas transport in the electrode.…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%