Preparation of microporous layer for proton exchange membrane fuel cell by using polyvinylpyrrolidone aqueous solution

Sheng, Yu; Li, Xiaojin; Hao, Jinkai; Liu, Sa; Shao, Zhigang; Yi, Baolian

doi:10.1016/j.ijhydene.2014.07.062

Cited by 17 publications

(5 citation statements)

References 29 publications

(19 reference statements)

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“…The rest of the hydrophobic pores provide pathways for reactant gases. Although the most common hydrophobic agent is PTFE, other hydrophobic agents, such as fluorinated ethylene propylene (FEP) and polydimethylsiloxane (PDMS), have also been used. , In addition, Yu et al have used polyvinyl pyrrolidone (PVP) as a replacement of PTFE in MPLs. MPLs containing PVP exhibit higher gas permeability, lower cell Ohmic resistance, and more homogeneous hydrophobicity than PTFE-based MPLs.…”

Section: Introductionmentioning

confidence: 99%

Microporous Layers with Different Decorative Patterns for Polymer Electrolyte Membrane Fuel Cells

Liang

Lin

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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To optimize the interface of the catalyst layer (CL) and gas diffusion layer (GDL) in polymer electrolyte membrane fuel cells (PEMFCs), microporous layers (MPLs) with different decorative patterns were prepared. Carbon paper treated with polytetrafluoroethylene was used as a substrate for the coating of MPLs. To accelerate water removal and gas permeation, ammonium chloride was utilized to improve the porous structure of MPLs. Owing to the recrystallization and pyrolysis of ammonium chloride with different contents, the surface of MPLs exhibited point-, line-, and flowerlike patterns. Membrane electrode assemblies (MEAs) were assembled to evaluate the performance of MPLs with different decorative patterns. From measurements, an MEA containing a porosity-graded MPL (MPL-G) with a flowerlike pattern exhibited the best electrochemical performance. It is because that graded porosity accelerates the removal of excessive water. The flowerlike pattern facilitates the diffusion of the reactant gas at the interface of the catalyst layer and MPL. With the measurement of segmented cell technology, such MEAs revealed an improved redispersion of reactant gases. Furthermore, the produced water was compressed to the gas outlet, providing a larger active region for reaction. These results indicate that pattern design of MPLs is a promising strategy to improve the mass-transfer efficiency at the interface of the catalyst layer and gas diffusion layer.

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Section: Introductionmentioning

confidence: 99%

Microporous Layers with Different Decorative Patterns for Polymer Electrolyte Membrane Fuel Cells

Liang

Lin

Chen

et al. 2020

ACS Appl. Mater. Interfaces

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“…Mater. Co. Ltd. PSDA‐20) and the calculation formula 43 can be written as below:

normalμ = normalη \times \frac{L}{A} \times \frac{Q}{∆ normalP}

where η is the viscosity of gas, Lis the thickness of the cross section of the GDL in the ventilation direction (m); A is the cross‐sectional area in the air permeability direction of the GDL (m 2 ); Q is the volumetric flow rate (m 3 /s); ΔP is the pressure difference across the GDL (Pa).…”

Section: Methodsmentioning

confidence: 99%

A novel hydrophilic‐modified gas diffusion layer for proton exchange membrane fuel cells operating in low humidification

et al. 2021

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Summary A novel hydrophilic‐modified gas diffusion layer (GDL) through inserting the polyacrylonitrile (PAN) into the microporous layer is fabricated to elevate the performance of the proton exchange membrane fuel cells (PEMFCs) under low humidfication. The single fuel cell test confirms that the membrane electrode assembly with 3 wt% addition of PAN in the cathode GDL exhibits a maximum power density of 0.616 W cm−2, which is 30% higher than that of conventional hydrophobic GDL (0.480 W cm−2) under low humidity. This significant enhancement in performance is attributed to the powerful wettability and the pore structure modification of the PAN. Besides, the introduction of PAN shows little influence on the performance of PEMFCs under full humidity. Our findings reported here shed new light on developing a robust GDL that can be used in both low and high humidification.

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“…Currently, optimization and improvement of MPLs revolve around (1) the thickness of MPLs [127][128][129], (2) the porosity and pore size distribution of MPLs [130][131][132][133], (3) hydrophobic or hydrophilic modifications of MPLs (Fig. 10a) [134][135][136][137][138], (4) MPLs with multiple hydrophilic and hydrophobic layers [139][140][141][142][143], and (5) modifications of MPL structures (Fig. 10b) (e.g., cracks and perforations as the liquid water pathway to the substrate layer, etc.)…”

Section: Gas Diffusion Layer (Gdl)mentioning

confidence: 99%

Recent Advances on PEM Fuel Cells: From Key Materials to Membrane Electrode Assembly

Mo,

Du,

Huang

et al. 2023

Electrochem. Energy Rev.

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In recent years, proton exchange membrane (PEM) fuel cells have regained worldwide attention from academia, industries, investors, and governments. The prospect of PEM fuel cells has turned into reality, with fuel cell vehicles successfully launched in the market. However, today’s fuel cells remain less competitive than combustion engines and batteries, primarily due to their high cost and short lifetime, which are significantly affected by the membrane electrode assembly (MEA), or the “chips” of PEM fuel cells. Therefore, many efforts have been devoted to developing advanced materials and manufacturing processes for MEAs. In this paper, we critically review the recent progress of key materials for MEAs, focusing on how to integrate materials into electrodes and MEAs. We also present the most advanced designs and manufacturing techniques of MEAs and discuss their possible constraints. Finally, perspectives on future R&D directions of materials and MEAs are provided. This review aims to bridge the gaps between academic material research and industrial manufacturing process development. Graphical Abstract

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Preparation of microporous layer for proton exchange membrane fuel cell by using polyvinylpyrrolidone aqueous solution

Cited by 17 publications

References 29 publications

Microporous Layers with Different Decorative Patterns for Polymer Electrolyte Membrane Fuel Cells

Microporous Layers with Different Decorative Patterns for Polymer Electrolyte Membrane Fuel Cells

A novel hydrophilic‐modified gas diffusion layer for proton exchange membrane fuel cells operating in low humidification

Recent Advances on PEM Fuel Cells: From Key Materials to Membrane Electrode Assembly

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