Effect of cell compression on the performance of a non–hot‐pressed MEA for PEMFC

Shrivastava, Neeraj; Chatterjee, Abheek; Harris, Tequila A. L.

doi:10.1002/er.4933

Cited by 13 publications

(9 citation statements)

References 72 publications

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“…The RH of the inlet gases also played a role in the GDL flooding and it was suggested to decrease the compression ratio with higher gas humidity. [ 526 ]…”

Section: Catalyst Layer Preparation Methodsmentioning

confidence: 99%

Engineering Catalyst Layers for Next‐Generation Polymer Electrolyte Fuel Cells: A Review of Design, Materials, and Methods

Suter

Smith

Hack

et al. 2021

Advanced Energy Materials

118

115

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Polymer electrolyte fuel cells (PEFCs) are a promising replacement for the fossil fuel–dependent automotive and energy sectors. They have become increasingly commercialized in the last decade; however, significant limitations on durability and performance limit their commercial uptake. Catalyst layer (CL) design is commonly reported to impact device power density and durability; although, a consensus is rarely reached due to differences in testing conditions, experimental design, and types of data reported. This is further exacerbated by aspects of CL design such as catalyst support, proton conduction, catalyst, fabrication, and morphology, being significantly interdependent; hence, a wider appreciation is required in order to optimize performance, improve durability, and reduce costs. Here, the cutting‐edge research within the field of PEFCs is reviewed, investigating the effect of different manufacturing techniques, electrolyte distribution, support materials, surface chemistries, and total porosity on power density and durability. These are critically appraised from an applied perspective to inform the most relevant and promising pathways to make and test commercially viable cells. This holistic view of the competing aspects of CL design and preparation will facilitate the development of optimized CLs, especially the incorporation of novel catalyst support materials.

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“…The RH of the inlet gases also played a role in the GDL flooding and it was suggested to decrease the compression ratio with higher gas humidity. [ 526 ]…”

Section: Catalyst Layer Preparation Methodsmentioning

confidence: 99%

Engineering Catalyst Layers for Next‐Generation Polymer Electrolyte Fuel Cells: A Review of Design, Materials, and Methods

Suter

Smith

Hack

et al. 2021

Advanced Energy Materials

118

115

View full text Add to dashboard Cite

show abstract

“…Using high stoichiometry and an ensuring even distribution of the double layer capacitance, the simple planar electrode models can be used to analyse data from the impedance spectra [16]. The simple equivalent circuit approach has, therefore, been used in a high number of studies and practical models for system monitoring in fuel-cell technology [7,8,11,12,[22][23][24]. In the system monitoring application, EIS is very attractive as it (i) requires only minimal additions in the required hardware and (ii) enables for a significantly faster means of obtaining data in contrast to recording of a complete polarization curve [13].…”

Section: Introductionmentioning

confidence: 99%

The Influence Catalyst Layer Thickness on Resistance Contributions of PEMFC Determined by Electrochemical Impedance Spectroscopy

et al. 2021

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Electrochemical impedance spectroscopy is an important tool for fuel-cell analysis and monitoring. This study focuses on the low-AC frequencies (2–0.1 Hz) to show that the thickness of the catalyst layer significantly influences the overall resistance of the cell. By combining known models, a new equivalent circuit model was generated. The new model is able to simulate the impedance signal in the complete frequency spectrum of 105–10−2 Hz, usually used in experimental work on polymer electrolyte fuel cells (PEMFCs). The model was compared with experimental data and to an older model from the literature for verification. The electrochemical impedance spectra recorded on different MEAs with cathode catalyst layer thicknesses of approx. 5 and 12 µm show the appearance of a third semicircle in the low-frequency region that scales with current density. It has been shown that the ohmic resistance contribution (Rmt) of this third semicircle increases with the catalyst layer’s thickness. Furthermore, the electrolyte resistance is shown to decrease with increasing catalyst-layer thickness. The cause of this phenomenon was identified to be increased water retention by thicker catalyst layers.

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“…Nevertheless, this technique is aggressive and can damage the membrane, the catalyst layer as well as decrease the porosity of the GDL. [170][171][172] It was recently reported that the degradation of the membrane can induce cracks in the catalyst layer, degrading the TPB and overall reduce the efficiency of the MEA. [173] An interesting path to overcome this issue was suggested by grafting organic free radical scavengers in the polymer matrix [174] or non-organic ones.…”

Section: Catalyst Layer and Ionomer Interfacementioning

confidence: 99%

Chemical Vapor Deposition for Advanced Polymer Electrolyte Fuel Cell Membranes

et al. 2022

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Fuel cells will play a critical role in a renewable energy powered society, whether in mobility or stationary applications. Certain challenges remain to be addressed if performance and cost dynamics of these systems is to achieve large scale, high unit number roll out. This review deals with polymer electrolyte membrane-based fuel cells with a specific focus on membrane materials and their innovative fabrication based on chemical vapor deposition (CVD) approaches. These deposition techniques are introduced, as are the potential improvements relating to cell performance, namely proton conductivity and stability. The potential benefits of applying CVD-based synthesis in the fabrication of polymer electrolytes is also discussed with respect to future fuel cell development.

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Effect of cell compression on the performance of a non–hot‐pressed MEA for PEMFC

Cited by 13 publications

References 72 publications

Engineering Catalyst Layers for Next‐Generation Polymer Electrolyte Fuel Cells: A Review of Design, Materials, and Methods

Engineering Catalyst Layers for Next‐Generation Polymer Electrolyte Fuel Cells: A Review of Design, Materials, and Methods

The Influence Catalyst Layer Thickness on Resistance Contributions of PEMFC Determined by Electrochemical Impedance Spectroscopy

Chemical Vapor Deposition for Advanced Polymer Electrolyte Fuel Cell Membranes

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