Stoichiometry

Figure 3: Effect of Anode Stoichiometry on PEM Stack Performance. Data at 500 ma/cm2 for hydrogen-carbon dioxide-nitrogen mixtures. Based on hydrogen stoichiometry. Data below a stoichiometry of 1.1 become unstable, with individual cells demonstrating severe voltage loss.

References:

1. anon, "Research and Development of Proton-Exchange-membrane (PEM) Fuel Cell System for Transportation Applications," The United States Department of Energy, Phase I, Final Report, Contract no. DE-AC02-90CH10435, January 1996.

2. J. M. Bentley, W. L. Mitchell, J. Thijssen, "Reformer and Hydrogen Storage Development for Fuel Cell Vehicles," Annual Automotive Technology Development Contracts' Coordination Meeting, Dearborn, MI, October 1995.

3. L. F. Brown, "A Survey of Processes for Producing Hydrogen Fuel From Different Sources for Automotive-Propulsion Fuel Cells", Los Alamos National laboratory, LA-113112-MS, March 1996.

4. K. R. Weisbrod, S. A. Grot, and N. E. Vanderborgh, Through-the-Electrode Model of a Proton Exchange membrane Fuel Cell," Elecirochemical Society Proceedings, Volume 95-23, p. 152.

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