Facilitation of water management in low Pt loaded PEM fuel cell by creating hydrophobic microporous layer with PTFE, FEP and PDMS polymers: Effect of polymer and carbon amounts

Öztürk, Ayşenur; Fıçıcılar, Berker; Eroğlu, İnci; Yurtcan, Ayşe Bayrakçeken

doi:10.1016/j.ijhydene.2017.06.202

Cited by 63 publications

(17 citation statements)

References 73 publications

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“…Both cases result in poor fuel cell performance. Therefore, extensive research works have been carried out on water management [35, 73] including optimum operational conditions, convenient cell system design, MEA material and structure design. Among all the strategies, MEA material and structure design take an important place, because water is produced in the CL and then expelled from the GDL to the flow channels.…”

Section: Resultsmentioning

confidence: 99%

Electrocatalytical Application of Platinum Nanoparticles Supported on Reduced Graphene Oxide in PEM Fuel Cell: Effect of Reducing Agents of Dimethlyformamide or Hydrazine Hydrate on the Properties

2021

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Two kinds of reduced graphene oxide (rGO) were synthesized with the reducing agents of either dimethylformamide (DMF) or hydrazine hydrate (HYD). The decoration of platinum nanoparticles (Pt NPs) over these materials was provided by microwave irradiation (MWI) method. Detailed physical and electrochemical measurements were carried out. Based on the electrochemical results of both catalysts, it is not surprising the achievement of higher electrochemical active surface area (ECSA), higher oxygen reduction reaction (ORR) activity, higher electron transfer number, lower charge transfer resistance and higher fuel cell performance with the Pt/rGO (DMF) catalyst which surpasses Pt/rGO (HYD) in many ways.

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Section: Resultsmentioning

confidence: 99%

Electrocatalytical Application of Platinum Nanoparticles Supported on Reduced Graphene Oxide in PEM Fuel Cell: Effect of Reducing Agents of Dimethlyformamide or Hydrazine Hydrate on the Properties

2021

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“…These features, combined with at least equal measured hydrophobicity [101], similar average pore size, and water-uptake, guarantee improved performances both at medium and high current density. In addition, FEP behaves as PTFE on electrical and thermal conductivity, therefore, the employment of the former polymer is not detrimental [102].…”

Section: Fepmentioning

confidence: 91%

The Role of Fluorinated Polymers in the Water Management of Proton Exchange Membrane Fuel Cells: A Review

et al. 2021

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As the hydrogen market is projected to grow in the next decades, the development of more efficient and better-performing polymer electrolyte membrane fuel cells (PEMFCs) is certainly needed. Water management is one of the main issues faced by these devices and is strictly related to the employment of fluorinated materials in the gas diffusion medium (GDM). Fluorine-based polymers are added as hydrophobic agents for gas diffusion layers (GDL) or in the ink composition of microporous layers (MPL), with the goal of reducing the risk of membrane dehydration and cell flooding. In this review, the state of the art of fluorinated polymers for fuel cells is presented. The most common ones are polytetrafluoroethylene (PTFE) and fluorinated ethylene propylene (FEP), however, other compounds such as PFA, PVDF, PFPE, and CF4 have been studied and reported. The effects of these materials on device performances are analyzed and described. Particular attention is dedicated to the influence of polymer content on the variation of the fuel cell component properties, namely conductivity, durability, hydrophobicity, and porosity, and on the PEMFC behavior at different current densities and under multiple operating conditions.

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“…13 There are numerous studies in the literature, which focus on the effects of MPL composition aimed at improving the performance of the fuel cell. [14][15][16][17][18][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] Furthermore, there are many investigations on the MPL, which can be characterised by the type and loading of the hydrophobic agent used 1,14,15,[19][20][21][22][23][24]31 and the carbon powder type used. 1,[15][16][17][18][19][25][26][27][28][29][30]32 Gas permeability is one of the key properties of the PEFC porous media, which describes how effective the convective gas transport is within the porous regions of the fuel cell and accurate values of permeability are needed to obtain realistic saturation profiles in PEFC models.…”

Section: Introductionmentioning

confidence: 99%

“…There are numerous studies in the literature, which focus on the effects of MPL composition 14‐34 aimed at improving the performance of the fuel cell 14‐18,20‐34 . Furthermore, there are many investigations on the MPL, which can be characterised by the type and loading of the hydrophobic agent used 1,14,15,19‐24,31 and the carbon powder type used 1,15‐19,25‐30,32 .…”

Section: Introductionmentioning

confidence: 99%

Effect of composition and structure of gas diffusion layer and microporous layer on the through‐plane gas permeability of PEFC porous media

Neehall

Ismail

Hughes

et al. 2021

Intl J of Energy Research

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The through-plane permeability of the gas diffusion media (GDM) is investigated experimentally with regard to the microporous layer (MPL) composition and the gas diffusion layer (GDL) composition and structure. The MPL composition is held constant at 80% carbon powder and 20% polytetrafluorethylene (PTFE) (by weight) for various carbon loadings. The decrease or increase in GDM permeability was found to be dependent on the structure of the GDL used in conjunction with the type of carbon powder. It was found that low-surface-area carbon powder (Vulcan XC-72R) forms thin, dense MPLs with small cracks when compared to high-surface-area powder (Ketjenblack EC-300J), which creates thick, rough MPLs with large cracks with increased carbon loadings. For most cases, the permeability decreases with increasing carbon loading; however, the non-woven, straight fibre carbon papers using Ketjenblack EC-300J show the lowest permeability at the lowest carbon loading. Furthermore, the percentage reduction from the GDL substrate permeability appears to be predictable for similar structures with increasing carbon loading. The increase in PTFE loading from 10% to 30% in the GDL was shown to have a significant impact on the percentage reduction from the original GDL permeability of $9% to 15% for the GDM composed of Vulcan XC-72R as carbon powder; however, such effects are insignificant when using Ketjenblack EC-300J carbon powder.

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Facilitation of water management in low Pt loaded PEM fuel cell by creating hydrophobic microporous layer with PTFE, FEP and PDMS polymers: Effect of polymer and carbon amounts

Cited by 63 publications

References 73 publications

Electrocatalytical Application of Platinum Nanoparticles Supported on Reduced Graphene Oxide in PEM Fuel Cell: Effect of Reducing Agents of Dimethlyformamide or Hydrazine Hydrate on the Properties

Electrocatalytical Application of Platinum Nanoparticles Supported on Reduced Graphene Oxide in PEM Fuel Cell: Effect of Reducing Agents of Dimethlyformamide or Hydrazine Hydrate on the Properties

The Role of Fluorinated Polymers in the Water Management of Proton Exchange Membrane Fuel Cells: A Review

Effect of composition and structure of gas diffusion layer and microporous layer on the through‐plane gas permeability of PEFC porous media

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