Transcript Document

Schematic of PEM fuel cell with the pressure sensitive film
Current collector
Gas diffusion layer (E-Lat)
Gasket
Gasket
Pressure sensitive film
Graphite flow-channel block
PEMFC Research
Bolts
MEA
Dept. of Chemical Engineering
End plate
Bolt
holes
University of South Carolina
Effect of torque on the cell polarization & power density with an E-LAT
(Tcell = 70 oC, T(A/C) = 85/75 oC, P(A/C) = 15/15 psig)
0.6
1.0
0.9
0.5
0.8
100 in-lb/bolt
0.7
125 in-lb/bolt
0.3
150 in-lb/bolt
0.6
0.2
0.5
100 in-lb/bolt
125 in-lb/bolt
0.1
0.4
150 in-lb/bolt
0.0
0.3
-0.1
0.2
0.0
0.2
0.4
0.6
1.0
0.8
1.2
1.4
Current density (A/cm2)
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina
Power density (W/cm 2)
Cell voltage (V)
0.4
Effect of torque on the cell polarization & power density
with TORAYTM & CARBEL
(Tcell = 70 oC, T(A/C) = 85/75 oC, P(A/C) = 15/15 psig)
1.0
0.5
0.9
0.4
Cell voltage (V)
0.3
0.7
125 in-lb/bolt
150 in-lb/bolt
100 in-lb/bolt
0.6
0.2
0.5
125 in-lb/bolt
0.1
150 in-lb/bolt
0.4
-0.0
0.3
100 in-lb/bolt
0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
Current density (A/cm2)
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina
Power density (W/cm 2)
0.8
Effect of torque on the cell polarization & power density with a TORAYTM
(Tcell = 70 oC, T(A/C) = 85/75 oC, P(A/C) = 15/15 psig)
1.0
0.5
0.9
0.4
0.3
0.7
100 in-lb/bolt
150 in-lb/bolt
0.6
125 in-lb/bolt
0.2
0.5
100 in-lb/bolt
0.4
150 in-lb/bolt
0.3
0.1
125 in-lb/bolt
0.0
0.2
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
Current density (A/cm2)
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina
Power density (W/cm 2)
Cell voltage (V)
0.8
Comparison of power densities for three diffusion layers
at torque 125 in-lbf/bolt
0.6
0.5
Power density (W/cm 2)
0.4
E-lat
0.3
Toray
Carbel100-Toray
0.2
0.1
0.0
-0.1
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
Current density (A/cm2)
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina