GDS3215

SKU: 3215.
Brands: .
Price: $28.00$75.00
Clear selection
  • Description
  • Technical Details
  • Downloads (.PDF)
  • Reviews (0)

Product Description

Base Material EP40


AvCarb Gas Diffusion Systems are fuel cell gas diffusion layers combining a carbon fiber paper substrate, a PTFE coating, and a surface microporous layer of PTFE and carbon particles. The table below lists nominal properties of commerically available AvCarb Gas Diffusion Systems, which have been engineered for optimal performance for selected fuel cell applications.

Information:

The Gas Diffusion Layer (GDL) is a very important supporting material in a Membrane Electrode Assembly (MEA). Gas diffusion layers are a porous material composed of a dense array of carbon fibers, which also provides an electrically conductive pathway for current collection. GDL plays an important role of electronic connection between the bipolar plate with channel-land structure and the electrode. In addition, the GDL also performs the following essential functions: passage for reactant transport and heat/water removal, mechanical support to the membrane electrode assembly (MEA), and protection of the catalyst layer from corrosion or erosion caused by flows or other factors. Physical processes in GDLs, in addition to diffusive transport, include bypass flow induced by in-plane pressure difference between neighboring channels, through-plane flow induced by mass source/sink due to electrochemical reactions, heat transfer like the heat pipe effect, two-phase flow, and electron transport.

The two types of gas diffusion layers most commonly used are carbon paper and carbon cloth. Both are carbon fiber based porous materials: carbon paper is non-woven, while carbon cloth is woven fabric, thus no binder is needed.

Gas Diffusion Layer’s Main Functions:

1. A gas diffused pathway from flow channels to the catalyst layer.
2. Help to remove by-produced water outside of the catalyst layer and prevent flooding.
3. Keep some water on surface for conductivity through the membrane.
4. Heat transfer during cell operation.
5. Provide enough mechanical strength to hold membrane electrode assembly from extension caused by water absorbance.
engineered for optimal performance for selected fuel cell applications.

 

Technical Details

Weight lbs
Dimensions 0.000 × 0.000 × 0.000 in
Base Material

EP40

Nominal Thickness

200

Nominal Base Weight

60

Break Strength machine direction

12.0

Break Strength cross machine direction

5.0

Stiffness machine direction

12.0

Stiffness cross machine direction

5.0

Bulk Density

0.30 (@ 0.68 N/cm2 / 1psi)

Compressibility

10.0 (22N – 113N)/22 x 100%

Through-Plane Resistivity

<14.0

Size

20cm x 20cm, 20cm x 25cm, 40cm x 40cm

Downloads (.PDF)

Reviews

There are no reviews yet.

Be the first to review “GDS3215”