X-ray absorption studies of mixed salt polymer electrolytes: ZnBr{sub 2}/CaBr{sub 2}-PEO, ZnBr{sub 2}/LiBr-PEO, and ZnBr{sub 2}/RbBr-PEO complexes

Journal Article · Tue Jan 31 23:00:00 EST 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2044003· OSTI ID:61490

McBreen, J; Yang, X Q; Lee, H S ^[1]; Okamoto, Y ^[2]

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1. Brookhaven National Lab., Upton, NY (United States)
2. Polytechnic Univ., Brooklyn, NY (United States)

Polyethylene oxide (PEO)-salt systems are an important new class of electrolytes that are being considered for many uses. X-ray absorption (XAS) studies of ZnBr{sub 2}-PEO complexes, at the Zn K edge, at temperatures between 25 and 120 C, indicate that additions of bromide salts of Li, Rb, or Ca result in the formation of ZnBr{sub 4}{sup {minus} 2} complexes with a Zn-Br bond length of 2.42 {angstrom}. XAS, at the Rb K edge, in mixed RbBr/ZnBr{sub 2}-PEO complexes with an excess of ZnBr{sub 2}, shows that the ZnBr{sub 2} causes the RbBr to dissolve in the polymer. The Rb{sup +} ions are weakly complexed with the PEO with an Rb-O bond distance of 2.93 {angstrom}.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY
• DOE Contract Number: FG05-89ER45384; AC02-76CH00016
• OSTI ID: 61490
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 2 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
CALCIUM BROMIDES
DIELECTRIC PROPERTIES
DISSOLUTION
EXPERIMENTAL DATA
LITHIUM BROMIDES
MICROSTRUCTURE
POLYETHYLENE GLYCOLS
RUBIDIUM BROMIDES
SOLVENT PROPERTIES
X-RAY SPECTROSCOPY
ZINC BROMIDES