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SUMMARY The NASA Redox Storage System Development proJect 1S managed by the Redox ProJect Office of the Solar and Electrochemistry D1v1s1on of the NASA Lewis Research Center in accordance w1th Interagency A9reement DE-AI04- 80AL12726 (formerly DOE/NASA Agreement EC-77-A-31-1002). The Department of Energy (DOE) Headquarter's Off1ce of Advanced Conservation Technologies has ass1gned lead center respons1bil1ty for this project to Sand1a Natlonal Lab- orator1es, Alburquerque, New Mexico, Storage Batterles Dlv1sion of the Com- ponents and Standards Directorate (flg. 1). Th1S annual report (for the period ending approx Dec. 1980) was prepared as part of the report1ng requ1rements under thlS interagency agreement. The report describes the technlcal accomplishments pertain1ng to the development of Redox systems and related technology. Task elements dlscussed ln this report are representat1ve of DOE policies in eXlstence during calendar year 1980. . PROJECT BACKGROUND The Energy Research and Development Agency (ERDA)-approved project development plan (PDP) entitled "Redox Flow Cell Development and Demonstra- tion ProJect Plan" and dated December 14, 1974, describes a phased effort to develop and demonstrate a NASA-concelved Redox flow system. S u f f i c i e n t energy storage capaclty would be provided to supply useful operatlonal ex- perience and preliminary cost data as basic input for the design and con- structlon of commercial systems. Slnce this PDP was approved, the original schedules, areas of emphasls, and resource estimates have been modified several times to reflect available funding as well as shifts in pacing and prioritles desired by ERDA/DOE pro- gram managers. The current proJect plannlng is based on a new multiyear project plan for development of Redox systems for solar applications and utility-load-leveling appl1cat1ons. The plan wlth schedular and funding modifications was endorsed by the lead center, Sandla National Laboratories, Albuquerque (SNLA) in July 1980. The operating perlod preceding this report provided dramat1c advances ln the enabllng technologies of ion-exchange membranes and electrocatalysts. Furthermore a ser1es of novel, system-related concepts were added to the basic concept and the1r technlcal feaslbllity has been demonstrated. The v1ab1llty of the Redox concept has been demonstrated by the opera- tion of short stacks of scaled-up Redox flow cells and by the operation of a 1-kW system. ProJec! goals were met or exceeded with peak power denslties greater than 75 W/ft and roundtrlp efficiencies of 75 percent on laboratory- size cel~s. All performance goals were exceeded ln the laboratory-size (14.5 cm ) cells. These accomplishments were made poss1ble, in part, by optim1z1ng the membranes for reduced resistlvlty and most significantly by developlng electrocatalysts for the reductlon and oxidation of chromlum ions.PDF Image | NASA Redox Storage System Development Project 1980
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