Gas Diffusion Layers

Gas Diffusion Layers

Gas Diffusion Layers (GDL) are key components in various types of fuel cells, including Proton Exchange Membrane (PEM), Direct Methanol (DMFC) and Phosphoric Acid (PAFC) stacks as well as in other electrochemical devices such as electrolyzers. In fuel cells, this thin, porous sheet must provide high electrical and thermal conductivity and chemical / corrosion resistance, in addition to controlling the proper flow of reactant gases (hydrogen and air) and managing the water transport out of the membrane electrode assembly (MEA). This layer must also have controlled compressibility to support the external forces from the assembly, and not deform into the bi-component plate channels to restrict flow. Other uses require different criteria, for example, electrolyzers require thicker, higher density porous plates, while humidifiers have most of the same requirements as fuel cell stacks, but the GDLs do not need to be electrically conductive. The GDL serves as a connection bridge between the MEA and graphite plate.

The main functions of GDL include the following

  • A gas diffused pathway from flow channels to the catalyst layer
  • Help removes by-produced water outside of the catalyst layer and prevent flooding
  • Keep some water on surface for conductivity through the membrane
  • Heat transfer during cell operation
  • Helps provide enough mechanical strength to hold the MEA from extension caused by water absorbency

What is the purpose of a Hydrophobic Treatment (AKA Wet Proofing)?

A hydrophobic treatment to GDL enables improved water transport. In PEM fuel cells, specifically water retention can result in lower power generation. These GDLs are treated with Teflon in order to make the material hydrophobic and improve water transport.

What is the purpose of a Micro-porous Layer (MPL)?

The purpose of the carbon Microporous Layer (MPL) is to minimize the contact resistance between the GDL and catalyst layer, limit the loss of catalyst to the GDL interior and help to improve water management as it provides effective water transport. MPL treatment is especially recommended for use with CCM (Catalyst Coated Membrane).

Frontis Energy proudly carries the largest selection of carbon based Gas Diffusion Layers (GDL) in Europe! If you know of a Gas Diffusion Layer we do not carry please contact us and let us know!


Carbon Cloth, ELAT - Hydrophilic Plain Cloth

Carbon Cloth, ELAT - Hydrophilic Plain Cloth

ELAT Hydrophilic Plain Carbon Cloth gas diffusion layers are excellent for flow batteries. The exc..

166.00€ Ex Tax: 166.00€

Carbon Cloth, Gas Diffusion Layer, ELAT LT1400

Carbon Cloth, Gas Diffusion Layer, ELAT LT1400

FuelCellsEtc's ELAT® LT1400 is a carbon cloth Gas Diffusion Layer (GDL) with a carbon microporous la..

162.00€ Ex Tax: 162.00€

Carbon Cloth, Gas Diffusion Layer, ELAT LT2400

Carbon Cloth, Gas Diffusion Layer, ELAT LT2400

ELAT® LT2400W is a carbon cloth gas diffusion layer (GDL) with a carbon microporous layer on both ..

0.00€ Ex Tax: 0.00€

Carbon Cloth, Woven, CeTech, with MPL - W1S1009

Carbon Cloth, Woven, CeTech, with MPL - W1S1009

CeTech is a woven carbon cloth with a Microporous Layer (MPL). It has a total thickness of 410 um ..

0.00€ Ex Tax: 0.00€

Carbon Paper, Freudenberg H14C7

Carbon Paper, Freudenberg H14C7

Freudenberg H14C7 is a flexible and easy to use carbon paper Gas Diffusion Layer (GDL) with a Microp..

360.00€ Ex Tax: 360.00€

Carbon Paper, Freudenberg H14C9

Carbon Paper, Freudenberg H14C9

Freudenberg H14C9 is a flexible and easy to use carbon paper Gas Diffusion Layer (GDL) with a Microp..

0.00€ Ex Tax: 0.00€

Carbon Paper, Toray 060 with Micro Porous Layer

Carbon Paper, Toray 060 with Micro Porous Layer

Toray Carbon Paper 060 - TGP-H-060 - is a carbon fiber composite paper suitable for use as a catalys..

0.00€ Ex Tax: 0.00€

Gas Diffusion System, AvCarb GDS2230

Gas Diffusion System, AvCarb GDS2230

AvCarb Material Solution’s Gas Diffusion System GDS2230 P75 combines AvCarb's proprietary carbon fib..

190.00€ Ex Tax: 190.00€

Plain Carbon Cloth, 1071 HCB

Plain Carbon Cloth, 1071 HCB

AvCarb 1071 HCB plain carbon cloth fabric is designed to meet the demanding requirements of fricti..

0.00€ Ex Tax: 0.00€

Platinized Titanium Screen

Platinized Titanium Screen

Platinized titanium (PtTi) screens are primarily used in electrolyzer stacks as part of the flow fie..

0.00€ Ex Tax: 0.00€

Titanium Screen Mesh Cloth

Titanium Screen Mesh Cloth

Grade 1 titanium screens are primarily used in electrolyzer stacks as part of the flow field or diff..

0.00€ Ex Tax: 0.00€

Carbon Paper, Sigracet 29 BC

Carbon Paper, Sigracet 29 BC

Sigracet 29 BC is a non-woven carbon paper with a Microporous Layer (MPL) that has been PTFE treated..

29.00€ Ex Tax: 29.00€

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