Cathodic reduction of sulfur dioxide in nonaqueous electrolytes. polarization curves at porous Electrodes
This paper describes some results obtained from studying the poloarization characteristics of cathodic sulfur dioxide reduction at porous electrodes made by applying a mixture of carbon black, graphite, and binder to a metal screen serving as current collector. Solutions of lithium perchlorate in propylene carbonate and in a mixture of propylene carbonate and acetonitrile were used as the electrolytes. Some typical galvanostatic discharge curves are shown for sulfur dioxide reduction at porous electrodes. The discharge capacity increases with increasing electrode porosity and decreasing current density. One can see when comparing the curves that the discharge capacities differ substantially for highly porous electrodes which had practically the same porosity of about 70%. The effect of current density is more important in solutions with a high SO/sub 2/ concentration. The operating efficiency of porous electrodes which serve as cathodes in high power Li-SO/sub 2/ power sources can be predicted on the basis of polorization curves for the porous electrodes which reflect the influence of macrostructure on the cathodic process.
- Research Organization:
- Dzerzhinskii Chemical Engineering Institute, Dne propetrovsk
- OSTI ID:
- 7148940
- Journal Information:
- Sov. Electrochem. (Engl. Transl.); (United States), Journal Name: Sov. Electrochem. (Engl. Transl.); (United States) Vol. 21:9; ISSN SOECA
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
ALKALI METAL COMPOUNDS
CARBON
CARBONIC ACID ESTERS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORINE COMPOUNDS
CRYSTAL STRUCTURE
CURRENT DENSITY
DESIGN
EFFICIENCY
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELEMENTAL MINERALS
ELEMENTS
ESTERS
EXTRACTION
GRAPHITE
HALOGEN COMPOUNDS
LITHIUM COMPOUNDS
LITHIUM PERCHLORATES
MICROSTRUCTURE
MINERALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PERCHLORATES
POLARIZATION
POLLUTION ABATEMENT
POROSITY
REDUCTION
REDUCTIVE EXTRACTION
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES