Single-cell-performance studies on the Fe/Cr redox energy-storage system using mixed-reactant solutions at elevated temperature

Technical Report · Fri Dec 31 23:00:00 EST 1982

OSTI ID:5935558

Gahn, R F; Hagedorn, N H; Ling, J S

Experimental studies in a 14.5-cm/sup 2/ single-cell system using mixed-reactant solutions at 65/sup 0/C are described. Systems were tested under isothermal conditions, i.e., reactants and the cell were at the same temperature. Charging and discharging performance were evaluated by measuring watt-hour and coulombic efficiencies, voltage-current relationships, hydrogen evolution and membrane resistivity. Watt-hour efficiencies ranged from 86% at 43 ma/cm/sup 2/ to 75% at 129 ma/cm/sup 2/ with corresponding coulombic efficiencies of 92% and 97%, respectively. Hydrogen evolution was less than 1% of the charge coulombic capacity during charge-discharge cycling. Bismuth and bismuth-lead catalyzed chromium electrodes maintained reversible performance and low hydrogen evolution under normal and adverse cycling conditions. Reblending of the anode and cathode solutions was successfully demonstrated to compensate for osmotic volume changes. Improved performance was obtained with mixed reactant systems in comparison to the unmixed reactant systems.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• DOE Contract Number: AI04-80AL12726
• OSTI ID: 5935558
• Report Number(s): DOE/NASA-12726-26; NASA-TM-83385; CONF-830812-12; ON: DE83012567
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
250902* -- Energy Storage-- Batteries-- Performance & Testing
CHARGE STATE
CHEMICAL REACTIONS
CHROMIUM
CURRENT DENSITY
DATA
ELECTRIC BATTERIES
ELECTRIC POTENTIAL
ELECTROCHEMICAL CELLS
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
IRON
MEMBRANES
METALS
NUMERICAL DATA
PERFORMANCE TESTING
REDOX REACTIONS
TESTING
TRANSITION ELEMENTS