X-ray absorption studies of PEO-ZnBr sub 2 complexes
- Dept. of Applied Science, Brookhaven National Lab., Upton, NY (US)
Polyethylene oxide (PEO)-ZnBr{sub 2} complexes, of the composition ZnBr{sub 2}(PEO){sub 8}, were investigated by extended x-ray absorption fine structure spectroscopy in the temperature range 25 to 120{degrees} C. The results at all temperatures were very similar, and were consistent with the presence of largely undissociated ZnBr{sub 2} species that were coordinated with four oxygens from the PEO. The respective calculated Zn-Br and Zn-O bond lengths were 2.34 and 2.23 {Angstrom}. There is evidence of some ZnBr{sub 2} dissociation at higher temperatures. In this paper a mechanism, based on Br{sup {minus}} ion hopping between anchored species of ZnBr{sub 2} and ZnBr{sup +} in PEO, is proposed to explain reported transport number and conductivity data.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7271982
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 139:4; ISSN 0013-4651; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101* -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
400400 -- Electrochemistry
BROMINE COMPLEXES
BROMINE IONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMISTRY
COMPLEXES
DIRECT ENERGY CONVERTERS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
FUEL CELLS
ION MOBILITY
IONS
MATERIALS TESTING
METAL-NONMETAL BATTERIES
MOBILITY
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PARTICLE MOBILITY
POLYETHYLENES
POLYMERS
POLYOLEFINS
SOLID ELECTROLYTE FUEL CELLS
SPECTRA
TEMPERATURE EFFECTS
TESTING
X-RAY SPECTRA
ZINC COMPLEXES
ZINC COMPOUNDS
ZINC OXIDES
ZINC-BROMINE BATTERIES