Accession Number : AD0786888

Title :   Evaluation of an Ion Exchange Membrane Fuel Cell for Space Power.

Descriptive Note : Final rept. Oct 69-Jan 74,

Corporate Author : AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Luke,Irvin F.

Report Date : MAY 1974

Pagination or Media Count : 22

Abstract : An experimental electrolysis cell using an ion exchange membrane (solid polymer electrolyte) achieved 29,120 hours of endurance testing prior to failure. The cell was tested under a repetitive cycle of 23-hours electrolysis operation and one-hour open circuit. The cell was operated in the electrolysis mode at a constant current density of 128 amperes per square foot (asf) with the average cell temperature maintained at 170F. Disassembly inspection of the cell after the endurance test revealed very little degradation in the electrodes and screens, but considerable decomposition of the water transport wicks. Small cracks in two areas of the membrane accounted for the ultimate failure of the cell. (Modified author abstract)

Descriptors :   *Fuel cells, *Ion exchange resins, Test methods, Polymers, Electrolytes, Reliability(Electronics), Spacecraft components

Subject Categories : Electric Power Production and Distribution
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE