NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Hydrogen-oxygen proton-exchange membrane fuel cells and electrolyzersHydrogen-oxygen solid polymer electrolyte (SPE) fuel cells and SPE electrolyzers (products of Hamilton Standard) both use a Proton-Exchange Membrane (PEM) as the sole electrolyte. These solid electrolyte devices have been under continuous development for over 30 years. This experience has resulted in a demonstrated ten-year SPE cell life capability under load conditions. Ultimate life of PEM fuel cells and electrolyzers is primarily related to the chemical stability of the membrane. For perfluorocarbon proton exchange membranes an accurate measure of the membrane stability is the fluoride loss rate. Millions of cell hours have contributed to establishing a relationship between fluoride loss rates and average expected ultimate cell life. This relationship is shown. Several features have been introduced into SPE fuel cells and SPE electrolyzers such that applications requiring greater than or equal to 100,000 hours of life can be considered. Equally important as the ultimate life is the voltage stability of hydrogen-oxygen fuel cells and electrolyzers. Here again the features of SPE fuel cells and SPE electrolyzers have shown a cell voltage stability in the order of 1 microvolt per hour. That level of stability has been demonstrated for tens of thousands of hours in SPE fuel cells at up to 500 amps per square foot (ASF) current density.
Document ID
19900011151
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Baldwin, R. (NASA Lewis Research Center Cleveland, OH., United States)
Pham, M. (NASA Lyndon B. Johnson Space Center Houston, TX., United States)
Leonida, A. (Hamilton Standard Windsor Locks, CT., United States)
Mcelroy, J. (Hamilton Standard Windsor Locks, CT., United States)
Nalette, T. (Hamilton Standard Windsor Locks, CT., United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1989
Publication Information
Publication: Space Electrochemical Research and Technology (SERT), 1989
Subject Category
Energy Production And Conversion
Accession Number
90N20467
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available