INVESTIGATION OF HYDRAZINE-AIR FUEL CELL SYSTEMS.
Progress rept. no. 3, 15 Aug-15 Nov 66,
MONSANTO RESEARCH CORP EVERETT MA BOSTON LAB
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In this quarter, the following tasks were carried out 1 study of electrode substrates 2 study of separator materials 3 study of effects of electrolyte on the air cathode and 4 full cell testing of improved anode. Proper treatment with catalyst poisons, particularly with S and Se, significantly reduced the excess gas evolution and NH3 content in the evolved gas on nickel plaque anodes, without significantly reducing their potentials. In 3 x 3 inch full cell testing, treatment with catalyst poisons increased the fuel efficiency and the active lives of both the anode and the cathode. The slope of the change of cathode potentials vs. the activity of the electrolyte is less than that on the hydrazine anode, suggesting a slight potential increase for the N2H4 - air full cell with an increase of the activity of the hydroxide electrolyte. The air cathode was not significantly poisoned by any of the impurities tested in the electrolyte, up to 100 ppm, except S. The cathode potentials were severely poisoned by S above 10 ppm in the KOH electrolyte.
- Electric Power Production and Distribution