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ProJect element •• • 4.0 - Supportlng Technology Contractor Giner, Inc. 14 SPrlng St. Waltham, Mass. 02154 Tltle••••••••••••••• OptlmizatlonandFabricatlonofPorous Carbon Electrodes for Iron-Chromium Princlpal lnvestigator Contract number • • • • Perlod of performance •• Work location •••• Contracting office Cumulative funding (through flscal year 1980; relmbursable only) .Vlnod M. Jalan DEN3-198 6/11/80 to 6/10/81 Waltham, Mass. NASA Lewls Research Center ~192 800 Background: ObJectlVes: Approach: Output: Since 1976, Glner, Inc., has investlgated varlOUS Redox couples, electrocatalysts, substrate materlals, and catalyst applicatlon procedures. The gold-lead catalyst was dlscovered to glve good electrochemlcal activlty for the chromlum electrode. Large dlfferences in the physical and chemical propertles of carbon felts were determined to be a major cause of electrode performance varlatlons. An alcohol-gold catalysis procedure was discovered that leads to improved electrode performance. To characterlze the carbon/graphite electrode substrate materlal, to evaluate gold-lead catalysis methods, to prepare assembly-ready electrodes up to 1 ft , and to evaluate alternatlve electrocatalysts. Study several commercially avallable carbon-graphlte felts by cyclic voltammetry for hydrogen evolution, chromium oxidatlon and reductlon, and lead oxidatlon and reductlon. Evaluate samples of felts prepared at six temperatures. Examlne alternative electrocatalysts for actlvlty. Speclflcatlons for a IIRedox gradell carbon felt. IdentificatlOn of IIstandardll cleanlng and catalysls procedures for prepar~tion of chromium electrodes. Chromlum electrodes up to 1 ft for testlng. Flnal report for the contract by November 1981. 35 Redox Flow CellsPDF Image | NASA Redox Storage System Development Project 1980
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