Fabrication Method for Laboratory-Scale High-Performance Membrane Electrode Assemblies for Fuel Cells

Sassin, Megan B.; Garsany, Yannick; Gould, Benjamin D.; Swider‐Lyons, Karen

doi:10.1021/acs.analchem.6b03005

Cited by 116 publications

(77 citation statements)

References 28 publications

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“…In another publication, the same authors [15] discussed the impact of the manufacturing process of the CCM, namely using the decal method, on the performance of the cell. The effect of the manufacturing process on catalyst coated membranes produced in the lab was also investigated in [16]. Sassin et al [16] examined various production parameters using direct deposition of the catalyst layer on the membrane via ultrasonic spray deposition.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of the manufacturing process on catalyst coated membranes produced in the lab was also investigated in [16]. Sassin et al [16] examined various production parameters using direct deposition of the catalyst layer on the membrane via ultrasonic spray deposition. They used this parametric analysis to investigate how production of the catalyst layer can ultimately affect the performance of the cell.…”

Section: Introductionmentioning

confidence: 99%

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Full Parametric Study of the Influence of Ionomer Content, Catalyst Loading and Catalyst Type on Oxygen and Ion Transport in PEM Fuel Cell Catalyst Layers

et al. 2020

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To advance the technology of polymer electrolyte membrane fuel cells, material development is at the forefront of research. This is especially true for membrane electrode assembly, where the structuring of its various layers has proven to be directly linked to performance increase. In this study, we investigate the influence of the various ingredients in the cathode catalyst layer, such as ionomer content, catalyst loading and catalyst type, on the oxygen and ion transport using a full parametric analysis. Using two types of catalysts, 40 wt.% Pt/C and 60 wt.% Pt/C with high surface area carbon, the ionomer/carbon content was varied between 0.29–1.67, while varying the Pt loading in the range of 0.05–0.8 mg cm−2. The optimum ionomer content was found to be dependent on the operating point and condition, as well as catalyst loading and type. The data set provided in this work gives a starting point to further understanding of structured catalyst layers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Full Parametric Study of the Influence of Ionomer Content, Catalyst Loading and Catalyst Type on Oxygen and Ion Transport in PEM Fuel Cell Catalyst Layers

et al. 2020

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“…[37] No delamination was observed before or after fuel cell operation. [37] No delamination was observed before or after fuel cell operation.…”

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confidence: 96%

“…Onto 33 AE 2 mm sPPB-H + and 80 AE 4 mm sPPN-H + membranes,c atalyst layers containing PFSA ionomer and 0.4 mg Pt cm À2 were deposited by ultrasonic spray coating using aS ono-Tek ExactaCoat SC. [37] No delamination was observed before or after fuel cell operation. These were mounted as fuel cells and conditioned in situ, displaying highly repetitive operation for 25 hours of RH cycling (Figure S41).…”

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confidence: 96%

Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

et al. 2017

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Two classes of novel sulfonated phenylated polyphenylene ionomers are investigated as polyaromatic-based proton exchange membranes. Both types of ionomer possess high ion exchange capacities yet are insoluble in water at elevated temperatures. They exhibit high proton conductivity under both fully hydrated conditions and reduced relative humidity, and are markedly resilient to free radical attack. Fuel cells constructed with membrane-electrode assemblies containing each ionomer membrane yield high in situ proton conductivity and peak power densities that are greater than obtained using Nafion reference membranes. In situ chemical stability accelerated stress tests reveal that this class of the polyaromatic membranes allow significantly lower gas crossover and lower rates of degradation than Nafion benchmark systems. These results point to a promising future for molecularly designed sulfonated phenylated polyphenylenes as proton-conducting media in electrochemical technologies.

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“…A typical PEMFC is composed of bipolar plates (BPPs) and a membrane electrode assembly (MEA), which is in a five layer structure comprising a proton exchange membrane (PEM) at the center, two coated catalyst layers (CLs) and two GDM [16]. The GDM are essential components of the PEMFCs, and play multiple functions during the PEMFC operation such as transportation of reactant gases to the CLs, removing produced water and heat from the MEA to the BPPs, and conducting electrons from the CLs to the BPPs [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of GDM Pairing on PEMFC Performance in Flow-Through and Dead-Ended Anode Mode

et al. 2020

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Asymmetric gas diffusion media (GDM) pairing, which feature distinct GDM at the anode and cathode of the proton electrolyte membrane fuel cell (PEMFC), enhance water management compared to symmetric pairing of GDM (anode and cathode GDM are identical). An asymmetric pairing of Freudenberg GDM (H24C3 at anode and H23C2 at cathode) reduces ohmic resistances by up to 40% and oxygen transport resistances by 14% en route to 25% higher current density in dry gas flows. The asymmetric GDM pairing effectively hydrates the membrane electrode assembly (MEA) while minimizing liquid water saturation in the cathode compared to a commonly used symmetric GDM pairing of SGL 29BC at the anode and cathode. Superior water management observed with asymmetric GDM in flow-through mode is also realized in dead-ended anode (DEA) mode. Compared to the symmetric GDM pairing, the asymmetric GDM pairing with Freudenberg GDM increases cell voltage at all current densities, extends and stabilizes steady-state voltage behavior, slows voltage decay, and vastly reduces the frequency of anode purge events. These results support that the asymmetric Freudenberg GDM combination renders the PEMFC less prone to anode water saturation and performance loss from the anticipated increase in water back-diffusion during DEA mode operation.

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Fabrication Method for Laboratory-Scale High-Performance Membrane Electrode Assemblies for Fuel Cells

Cited by 116 publications

References 28 publications

Full Parametric Study of the Influence of Ionomer Content, Catalyst Loading and Catalyst Type on Oxygen and Ion Transport in PEM Fuel Cell Catalyst Layers

Full Parametric Study of the Influence of Ionomer Content, Catalyst Loading and Catalyst Type on Oxygen and Ion Transport in PEM Fuel Cell Catalyst Layers

Highly Stable, Low Gas Crossover, Proton‐Conducting Phenylated Polyphenylenes

Effect of GDM Pairing on PEMFC Performance in Flow-Through and Dead-Ended Anode Mode

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