AvCarb® Gas Diffusion Systems and Coated Papers


AvCarb Material Solution’s Gas Diffusion Systems combine our proprietary carbon fiber paper, a PTFE treatment, and micro-porous layer coating, each designed for the rigorous demands of specific fuel cell applications such as PEMFC, DMFC, and PAFC.

AvCarb Coated Papers are hydrophobic versions of our standard Carbon Papers. PTFE treatments are applied to repel water during fuel cell operation.

AvCarb Gas Diffusion Systems are based upon carbon fiber paper. AvCarb carbon fabrics and AvCarb Molded Graphite Laminates treated with PTFE and micro-porous layers for fuel cell applications are also available. Please consult our GDL product selection guide for help in identifying the optimal GDL design for your application.

Benefits

Optimized fuel cell performance by application
Gas permeability
Conductivity
Physical property uniformit
Cost effective, high volume manufacturing methods

Availability

RollsCut Sheets
400 mm or 800 mm widthSamples available upon request
10-800 m length
Cores 6" / 152mm ID

Gas Diffusion Systems (PTFE + MPL)

Typical PropertyUNITSAvCarb MB30AvCarb GDS3215AvCarb GDS3250AvCarb GDS3260AvCarb GDS2230AvCarb GDS2240AvCarb GDS22100AvCarb GDS2120AvCarb GDS1120
Base MaterialAvCarb EP40AvCarb EP40AvCarb EP40AvCarb EP40AvCarb P75AvCarb P75AvCarb P75AvCarb P75AvCarb P50
Nominal Thickness
(@ 5.00 N/cm2)
microns205200225210275275330248184
Nominal Base Weightg/m2556075809811018510179
Break Strength
machine direction
MPa12.012.012.014.06.58.58.025.018.0
Break Strength
cross machine direction
MPa5.05.07.08.54.05.55.015.010.0
Stiffness
machine direction
Taber12.012.010.010.022.022.021.010.0
Stiffness
cross machine direction
Taber6.05.08.08.020.020.018.014.76.0
Bulk Density
(@ 0.68 N/cm2 / 1psi)
g/cm30.280.300.330.380.350.400.530.400.40
Compressibility
(22N - 113N)/22 x 100%
%15.010.016.015.017.015.07.011.014.0
Through-Plane ResistivitymOhm*cm2<12.0<14.0<14.0<14.0<14.0<14.0<17.0<14.0<14.5
Typical Roll Widthmm400/800400/800400/800400/800400/800400/800400/800400/800400/800

PTFE Treated Products

Substrate GradeEP40TP50TP75T
Nominal Thickness
(@ 1psi / 0.7 N/cm2)
200180255
Nominal Thickness
(@ 1psi / 0.7 N/cm2)
190160240
Nominal Basis Weight436285
Break Strength
machine direction
6.515.220.0
Break Strength
cross machine direction
4.07.612.6
Stiffness
machine direction
22.08.521.0
Stiffness
cross machine direction
4.53.114.6
Bulk Density
(@ 0.69 N/cm3 / 1psi)
0.220.340.33
Air Permeability (Gurley)
through-plane
7.55025
Air Permeability (Gurley)
in-plane
7559626
Compressibility
(22N - 113N)/22 x 100%
10.512.511.0
Through-Plane
Resistivity
13.011.713.4
Typical Roll
Width
400/800400/800400/800