Ionic conductivity of a polymer electrolyte with modified carbonate as a plasticizer for poly(ethylene oxide)
- Brookhaven National Lab., Upton, NY (United States)
- Moltech Corp., Stony Brook, NY (United States)
- Polytechnic Univ., Brooklyn, NY (United States)
A new type of plasticizer, a modified carbonate (MC3) made by attaching three ethylene oxide units to the 4-position of ethylene carbonate, has been synthesized. The ionic conductivity of a polymer electrolyte using this type of plasticizer in a poly(ethylene oxide) (PEO)-LiCF[sub 3]SO[sub 3] complex has been studied. Adding 50% of this plasticizer by weight of PEO to the PEO-LiCF[sub 3]SO[sub 3] complex, yielded an ionic conductivity of 5 [times] 10[sup [minus]5] S/cm at 25 C, which is two orders of magnitude higher than that found for a PEO-LiCF[sub 3]SO[sub 3] electrolyte without a plasticizer, and one order of magnitude higher than that found when using propylene carbonate (PC) as a plasticizer. The temperature dependence of the conductivity and thermal analysis results indicate that this new plasticizer increases the ionic conductivity throughout the entire complex system, whereas conventional plasticizers, like PC, simply create a high conductivity pathway through the plasticizer itself. The new plasticizer also enhances the ion pair dissociation which in turn improves the ionic conductivity.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7200872
- Journal Information:
- Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:4; ISSN JESOAN; ISSN 0013-4651
- Country of Publication:
- United States
- Language:
- English
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ADDITIVES
ALCOHOLS
ALKALI METAL COMPOUNDS
ELECTRIC BATTERIES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
GLYCOLS
HYDROXY COMPOUNDS
IONIC CONDUCTIVITY
LITHIUM COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
PLASTICIZERS
POLYETHYLENE GLYCOLS
POLYMERS
SOLID ELECTROLYTES