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Title: Electrochemical rebalance cell for Redox systems

Abstract

An electrochemical rebalance cell for maintaining electrochemical balance, at the system level, of the acidified aqueous iron chloride and chromium chloride reactant solutions in the NASA Redox energy storage system was constructed and evaluated. The electrochemical reaction for the cathode is Fe/sup +3/ + e/sup -/ ..-->.. Fe/sup +2/, and that for the anode is 1/2H/sub 2/ ..-->.. H/sup +/ + e/sup -/. The iron (carbon felt) electrode and the hydrogen (plantinized carbon) electrode are separated by an anion exchange membrane. The performance of the rebalance cell is discussed as well as the assembly of a single rebalance cell and multicell stacks. Various cell configurations were tested and the results are presented and discussed. The rebalance cell was also used to demonstrate its ability, as a preparative tool, for making high-purity solutions of soluble reduced metal ionic species. Preparations of titanium, copper, vanadium, and chromium ions in acidified solutions were evaluated.

Authors:
Publication Date:
Research Org.:
National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
OSTI Identifier:
5930218
Report Number(s):
DOE/NASA/12726-20; NASA-TM-83363
ON: DE83015307
DOE Contract Number:  
AI04-80AL12726
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; 20 FOSSIL-FUELED POWER PLANTS; ENERGY STORAGE SYSTEMS; REDOX FUEL CELLS; AUXILIARY SYSTEMS; ANIONS; CHROMIUM CHLORIDES; CONSTRUCTION; DESIGN; ELECTROCATALYSTS; HYDROGEN; ION EXCHANGE MATERIALS; IRON CHLORIDES; IRON IONS; PLATINUM; TESTING; CATALYSTS; CHARGED PARTICLES; CHLORIDES; CHLORINE COMPOUNDS; CHROMIUM COMPOUNDS; DIRECT ENERGY CONVERTERS; ELECTROCHEMICAL CELLS; ELEMENTS; ENERGY SYSTEMS; FUEL CELLS; HALIDES; HALOGEN COMPOUNDS; IONS; IRON COMPOUNDS; MATERIALS; METALS; NONMETALS; PLATINUM METALS; REGENERATIVE FUEL CELLS; TRANSITION ELEMENT COMPOUNDS; TRANSITION ELEMENTS; 300503* - Fuel Cells- Materials, Components, & Auxiliaries; 200107 - Fossil-Fueled Power Plants- Off-Peak Energy Storage- (1980-)

Citation Formats

Stalnaker, D K. Electrochemical rebalance cell for Redox systems. United States: N. p., 1983. Web.
Stalnaker, D K. Electrochemical rebalance cell for Redox systems. United States.
Stalnaker, D K. Wed . "Electrochemical rebalance cell for Redox systems". United States.
@article{osti_5930218,
title = {Electrochemical rebalance cell for Redox systems},
author = {Stalnaker, D K},
abstractNote = {An electrochemical rebalance cell for maintaining electrochemical balance, at the system level, of the acidified aqueous iron chloride and chromium chloride reactant solutions in the NASA Redox energy storage system was constructed and evaluated. The electrochemical reaction for the cathode is Fe/sup +3/ + e/sup -/ ..-->.. Fe/sup +2/, and that for the anode is 1/2H/sub 2/ ..-->.. H/sup +/ + e/sup -/. The iron (carbon felt) electrode and the hydrogen (plantinized carbon) electrode are separated by an anion exchange membrane. The performance of the rebalance cell is discussed as well as the assembly of a single rebalance cell and multicell stacks. Various cell configurations were tested and the results are presented and discussed. The rebalance cell was also used to demonstrate its ability, as a preparative tool, for making high-purity solutions of soluble reduced metal ionic species. Preparations of titanium, copper, vanadium, and chromium ions in acidified solutions were evaluated.},
doi = {},
url = {https://www.osti.gov/biblio/5930218}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {6}
}

Technical Report:
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