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Gas Diffusion Layers (GDL) are key components many types of fuel cells, such as
Proton Exchange Membrane (PEMFC ),
Direct Methanol (DMFC)
Phosphoric Acid (PAFC)
They are also important to other electrochemical devices such as electrolyzers.
In fuel cells, this thin, porous sheet will provide high electrical and thermal conductivity and chemical / corrosion resistance, and then they will the proper flow of reactant gases (hydrogen and air) and manage the water transport out of the MEA.
The GDL serves as a connection bridge between the MEA and Graphite Plate.
With MPL coating to minimize the contact resistance between the GDL and catalyst layer, it will better 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).
Code | SKU | HW-TZ-190 | ||
1 | Material Type | Carbon paper | Unit | |
2 | Thickness | 190±0.02 | um | |
3 | Surface roughness | 8 | um | |
4 | Bulk density | 0.44 | g/cm³ | |
5 | Gas permeability | 1900 | ml.mm/(2.hr.mmAq) | |
6 | Porosity | 78 | % | |
7 | Flexural modulus | 10 | Gpa | |
8 | Bending strength | 40 | MPa | |
9 | Tensile strength | 50 | MPa | |
10 | Contact resistivity | 80 | mΩ.cm | |
11 | In-plane resistivity | 5.8 | mΩ.cm | |
12 | Through-plane thermal conductivity (25℃) | 1.7 | w/mk | |
13 | In-plane thermal conductivity (25℃) | 21 | w/mk | |
14 | In-plane thermal conductivity (100℃ | 23 | w/mk | |
15 | Plane thermal expansion coefficient | -0.8 | ||
16 | Compressibility (at 5 psi, 1.0MPa) | 24 | % | |
17 | Water contact angle (MPL side) | ＞130 | ° | |
18 | PTFE processing capacity | 5-20 | wt% | |
19 | MPL coating loading | 1 | mg/cm² | |
20 | Impurity content (iron, cobalt, nickel) | ＜10 | PPM | |
