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Factors affecting the open-circuit voltage and electrode kinetics of some iron/titanium redox flow cells

Author
Gahn, R. F.
Published
May 1, 1977.
Physical Description
1 electronic document
Additional Creators
Reid, M. A.
Online Version

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Summary
Performance of the iron-titanium redox flow cell was studied as a function of acid concentration. Anion permeable membranes separated the compartments. Electrodes were graphite cloth. Current densities ranged up to 25 mA/square centimeter. Open-circuit and load voltages decreased as the acidity was increased on the iron side as predicted. On the titanium side, open-circuit voltages decreased as the acidity was increased in agreement with theory, but load voltages increased due to decreased polarization with increasing acidity. High acidity on the titanium side coupled with low acidity on the iron side gives the best load voltage, but such cells show voltage losses as they are repeatedly cycled. Analyses show that the bulk of the voltage losses are due to diffusion of acid through the membrane.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19770019668.
Accession ID: 77N26612.
ERDA/NASA-1002/77/10.
E-9193.
NASA-TM-X-73669.
Symp. on Electrode Mater. and Processes for Energy Conversion and Storage; 8-13 May 1977; Philadelphia.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15731983