The effect of oxygen partial pressure and humidification in proton exchange membrane fuel cells at intermediate temperature (80–120 °C)

Butori, Martina; Eriksson, Björn; Nikolić, Nikola; Lagergren, Carina; Lindbergh, Göran; Lindström, Rakel Wreland

doi:10.1016/j.jpowsour.2023.232803

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…The figure shows that R total increases with increasing pressure at all three temperatures due to the increase in gas pressure inside the cell leading to an increase in the number of N 2 molecules surrounding the O 2 molecules per unit volume. As a result, the mean free range between the gas molecules decreases [18], making it more difficult for the molecules to reach the active site. This, in turn, increases the total oxygen transport resistance.…”

Section: Calculation and Analysis Of The Resistance Of Each Partmentioning

confidence: 99%

“…This may be due to the fact that the increase in temperature accelerates the rate of the ORR reaction while simultaneously decreasing the equilibrium potential (E 0 ) of the reaction by about 33 mV [33]. Butori et al [18] corrected the measurements for changes in equilibrium potential. The current density at constant cathodic overpotential increased with increasing temperature.…”

Section: Calculation and Analysis Of The Resistance Of Each Partmentioning

confidence: 99%

“…Currently, there is an increasing number of studies related to the performance of MEA for PEMFC at intermediate temperatures [14,17,18]. However, research on the resistance to oxygen transport at intermediate temperatures is not well developed.…”

Section: Introductionmentioning

confidence: 99%

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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: Calculation and Analysis Of The Resistance Of Each Partmentioning

confidence: 99%

Section: Calculation and Analysis Of The Resistance Of Each Partmentioning

confidence: 99%

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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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High‐Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquids

Rodenbücher,

Korte,

Chen

et al. 2024

Fuel Cells

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A hydrogen‐based energy system will be the backbone of a future energy grid using renewable energies. It is widely accepted that polymer electrolyte membrane fuel cells (PEMFCs) are promising converters of chemical energy stored as hydrogen into electrical energy. An increase of the operation temperature from below 80°C to above about 160°C is considered beneficial, as it would allow for much simpler water management and the use of waste heat. Here, we are investigating protic ionic liquids (PILs) immobilized in a polybenzimidazole polymer as electrolytes for high‐temperature PEMFCs. Ionic liquids are promising for fuel cell applications as they provide high thermal and chemical stability and high proton conductivity. In contrast to aqueous electrolytes, ionic liquids form a dense layered structure at the electrode–electrolyte interface that depends on the potential and on the content of residual water in the electrolyte. We investigate how PILs interact with the host polymer of the membrane revealing that porous polymer structures can be formed by solution casting, which allows for an encapsulation of the ionic liquid within the pores. After doping the polymer with small amounts of phosphoric acid, the membranes showed reasonable conductivity and fuel cell performance.

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Comprehensive performance evaluation of air-assisted atomization humidification for high-power fuel cell systems

Huang,

Luo,

Jiang

et al. 2025

Applied Energy

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The effect of oxygen partial pressure and humidification in proton exchange membrane fuel cells at intermediate temperature (80–120 °C)

Cited by 9 publications

References 33 publications

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

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

High‐Temperature Polymer Electrolyte Fuel Cells Based on Protic Ionic Liquids

Comprehensive performance evaluation of air-assisted atomization humidification for high-power fuel cell systems

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