The importance of carbon materials in micro-porous layer in gas diffusion layers for proton exchange membrane fuel cells

Schweiss, Ruediger; Öttinger, Oswin

doi:10.1016/j.carbon.2015.07.017

Cited by 6 publications

(13 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…All GDM were hydrophobic from a standard treatment of polytetrafluoroethylene (PTFE) by the manufacturer with 5 wt% PTFE in the GDL and 23 wt% PTFE in the MPL. Properties for all GDM tested in this work obtained from the manufacturer for 28BC and 29BC 34 and from El-Kharouf et al for 35BC 35 are listed in Table I. The GDM in all MEAs were compressed by 20% the uncompressed GDM thickness, which was close to values found to be optimal for forced convection, closed-cathode fuel cells using SGL GDM.…”

Section: Methodssupporting

confidence: 68%

“…45 This is described in Eq. 1: 34 current collectors (R cc ), catalyst layer proton transport resistance (R CL,H+ ), 51 and Nafion XL membrane resistance (R Naf-XL ). 52 (C) Sum of contact resistances for each type of MEA, which consists of interfacial contact resistances between adjacent cell components and the resistances of cell wiring and leads.…”

Section: Influence Of Cathode Gdm Porosity Onmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Cathode Gas Diffusion Media Porosity on Open-Cathode Fuel Cells

Atkinson

Rodgers

Hazard

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

We investigate the effect of gas diffusion media (GDM) porosity on open-cathode fuel cell operation in challenging ambient air conditions known to exacerbate either cell dehydration or liquid water saturation. A less porous cathode GDM improves cell contact that decreases interfacial contact resistances. We relate structural properties of the cathode GDM to heat rejection, oxygen transport, and water management in the open-cathode fuel cell using polarization behavior and electrochemical impedance spectroscopy. Less porous cathode GDM reduce the measured cell temperature at the cathode surface and decrease ohmic resistance by >33% at 0.6 V, increasing current density from 0.197 to 0.299 mA cm −2 . Small decreases in cathode GDM porosity considerably improve thermal management, cell hydration, cathode charge transfer, and decrease ohmic resistance, increasing current density and power production despite concomitant increases in mass transport resistance.

show abstract

Section: Methodssupporting

confidence: 68%

Section: Influence Of Cathode Gdm Porosity Onmentioning

confidence: 99%

Influence of Cathode Gas Diffusion Media Porosity on Open-Cathode Fuel Cells

Atkinson

Rodgers

Hazard

et al. 2018

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Carbon paper is used as gas diffusion layer (GDL) in direct methanol fuel cells [26]. The electrocatalysts, which consist of reaction layers of precious metals with nanometer-size features, are frequently deposited directly on the GDL.…”

Section: Surface Activation Of Carbon Paper Gas Diffusion Layers In Fmentioning

confidence: 99%

2 Plasma surface activation and functionalization of carbon-based materials

Dong¹,

Gallo²

2020

Carbon-Based Smart Materials

View full text Add to dashboard Cite

“…7 Adjusting the PTFE content between 5 and 20 wt % on the backing of the MPL 16 and MPL with different carbon blends has been shown to influence and improve the performance of proton exchange membrane fuel cells depending on the carbon fiber paper–MPL characteristics. 17 − 19 The PTFE loading of the MPL and substrate layer, as well as GDL thickness, can be adjusted to optimize cell performance and water management within the GDL. 20 …”

Section: Introductionmentioning

confidence: 99%

“…The MPL used in this study has a 23 wt % PTFE loading, which was determined by Schweiss et al to have the optimum balance of porosity and hydrophobicity for the carbon fiber paper–carbon MPL layer used in this study . Adjusting the PTFE content between 5 and 20 wt % on the backing of the MPL and MPL with different carbon blends has been shown to influence and improve the performance of proton exchange membrane fuel cells depending on the carbon fiber paper–MPL characteristics. − The PTFE loading of the MPL and substrate layer, as well as GDL thickness, can be adjusted to optimize cell performance and water management within the GDL …”

Section: Introductionmentioning

confidence: 99%

Effects of Electrode Support Structure on Electrode Microstructure, Transport Properties, and Gas Diffusion within the Gas Diffusion Layer

et al. 2022

View full text Add to dashboard Cite

The effects of gas diffusion layer (GDL) and electrode microstructure, which influence the catalyst layer and catalyst–membrane interface on the performance of a membrane electrode assembly (MEA) for gas-phase electrolysis and the separation of CO 2 were experimentally characterized. Several types of GDL materials, with and without a microporous layer (MPL), were characterized using scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) surface area analysis. The diffusion of reactants through the GDL materials was measured to determine the effects on the microstructure and chemical properties on mass transport. The effects on the GDL structure and chemistry were determined through evaluation of Pt–IrO 2 MEAs with different GDL materials using constant-current measurements. Increasing the thickness of the MPL and hydrophobicity within the GDL assist with retaining water within the membrane and catalyst layers, which results in greater performance at high current densities.

show abstract

The importance of carbon materials in micro-porous layer in gas diffusion layers for proton exchange membrane fuel cells

Cited by 6 publications

References 13 publications

Influence of Cathode Gas Diffusion Media Porosity on Open-Cathode Fuel Cells

Influence of Cathode Gas Diffusion Media Porosity on Open-Cathode Fuel Cells

2 Plasma surface activation and functionalization of carbon-based materials

Effects of Electrode Support Structure on Electrode Microstructure, Transport Properties, and Gas Diffusion within the Gas Diffusion Layer

Contact Info

Product

Resources

About