[1] Argonne Natl Lab, Argonne, IL 60439 USA
[2] Tennessee State Univ, Dept Mech & Mfg Engn, Nashville, TN 37209 USA
[3] US DOE, Off Hydrogen Fuel Cells & Infrastruct Technologie, Washington, DC 20585 USA
[4] Natl Renewable Energy Lab, Browns Mills, NJ USA
[5] Pacific NW Natl Lab, Richland, WA 99354 USA