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Redox flow cell energy storage systemsThe redox flow cell energy storage system being developed by NASA for use in remote power systems and distributed storage installations for electric utilities is presented. The system under consideration is an electrochemical storage device which utilizes the oxidation and reduction of two fully soluble redox couples (acidified chloride solutions of chromium and iron) as active electrode materials separated by a highly selective ion exchange membrane. The reactants are contained in large storage tanks and pumped through a stack of redox flow cells where the electrochemical reactions take place at porous carbon felt electrodes. Redox equipment has allowed the incorporation of state of charge readout, stack voltage control and system capacity maintenance (rebalance) devices to regulate cells in a stack jointly. A 200 W, 12 V system with a capacity of about 400 Wh has been constructed, and a 2 kW, 10kWh system is planned.
Document ID
19790054178
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thaller, L. H.
(NASA Lewis Research Center Solar and Electrochemistry Div., Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
June 1, 1979
Subject Category
Energy Production And Conversion
Report/Patent Number
AIAA PAPER 79-0989
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Terrestrial Energy Systems Conference
Location: Orlando, FL
Start Date: June 4, 1979
End Date: June 6, 1979
Sponsors: American Institute of Aeronautics and Astronautics
Accession Number
79A38191
Funding Number(s)
CONTRACT_GRANT: E(49-28)-1002
Distribution Limits
Public
Copyright
Other

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