Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications

Abbou, Sofyane; Tajiri, Kazuya; Alofari, Karrar; Médici, Ezequiel; Haug, Andrew T.; Allen, Jeffrey S.

doi:10.1149/2.0271907jes

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…Details of the exact experimental details can be found in ref. 54 . The amount of water uptake shown in Table 1 is calculated based on the difference between the initial weight of the sample and its weight after water absorption at 900 s before being removed from water vessel.…”

Section: Methodsmentioning

confidence: 99%

Revealing the role of ionic liquids in promoting fuel cell catalysts reactivity and durability

et al. 2022

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Ionic liquids (ILs) have shown to be promising additives to the catalyst layer to enhance oxygen reduction reaction in polymer electrolyte fuel cells. However, fundamental understanding of their role in complex catalyst layers in practically relevant membrane electrode assembly environment is needed for rational design of highly durable and active platinum-based catalysts. Here we explore three imidazolium-derived ionic liquids, selected for their high proton conductivity and oxygen solubility, and incorporate them into high surface area carbon black support. Further, we establish a correlation between the physical properties and electrochemical performance of the ionic liquid-modified catalysts by providing direct evidence of ionic liquids role in altering hydrophilic/hydrophobic interactions within the catalyst layer interface. The resulting catalyst with optimized interface design achieved a high mass activity of 347 A g−1Pt at 0.9 V under H2/O2, power density of 0.909 W cm−2 under H2/air and 1.5 bar, and had only 0.11 V potential decrease at 0.8 A cm−2 after 30 k accelerated stress test cycles. This performance stems from substantial enhancement in Pt utilization, which is buried inside the mesopores and is now accessible due to ILs addition.

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Section: Methodsmentioning

confidence: 99%

Revealing the role of ionic liquids in promoting fuel cell catalysts reactivity and durability

et al. 2022

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Structure, Property, and Performance of Catalyst Layers in Proton Exchange Membrane Fuel Cells

Zhao

Liu

2023

Electrochem. Energy Rev.

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Catalyst layer (CL) is the core component of proton exchange membrane (PEM) fuel cells, which determines the performance, durability, and cost. However, difficulties remain for a thorough understanding of the CLs’ inhomogeneous structure, and its impact on the physicochemical and electrochemical properties, operating performance, and durability. The inhomogeneous structure of the CLs is formed during the manufacturing process, which is sensitive to the associated materials, composition, fabrication methods, procedures, and conditions. The state-of-the-art visualization and characterization techniques are crucial to examine the CL structure. The structure-dependent physicochemical and electrochemical properties are then thoroughly scrutinized in terms of fundamental concepts, theories, and recent progress in advanced experimental techniques. The relation between the CL structure and the associated effective properties is also examined based on experimental and theoretical findings. Recent studies indicated that the CL inhomogeneous structure also strongly affects the performance and degradation of the whole fuel cell, and thus, the interconnection between the fuel cell performance, failure modes, and CL structure is comprehensively reviewed. An analytical model is established to understand the effect of the CL structure on the effective properties, performance, and durability of the PEM fuel cells. Finally, the challenges and prospects of the CL structure-associated studies are highlighted for the development of high-performing PEM fuel cells. Graphical abstract

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Development of scrubber with nano-TiO2 coated packing for H2S removal

Deyhim

Shahna

Jaleh

et al. 2021

Process Safety and Environmental Protection

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Capillary Penetration Method for Measuring Wetting Properties of Carbon Ionomer Films for Proton Exchange Membrane Fuel Cell (PEMFC) Applications

Cited by 3 publications

References 36 publications

Revealing the role of ionic liquids in promoting fuel cell catalysts reactivity and durability

Revealing the role of ionic liquids in promoting fuel cell catalysts reactivity and durability

Structure, Property, and Performance of Catalyst Layers in Proton Exchange Membrane Fuel Cells

Development of scrubber with nano-TiO2 coated packing for H2S removal

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