Improvement of ionic conductivity in plasticized PEO-based solid polymer electrolytes
- Army Research Lab. AMSRL-EP-PB Electronics and Power Sources Directorate, Fort Monmouth, NJ (United States)
The ionic conductivity of a solid polymer electrolyte based on a lithium salt dissolved in a poly(ethylene oxide) (PEO) host was significantly improved with the use of plasticizing agents. Either a plasticizing salt, solvent, or combinations of both were incorporated into free-standing solution-cast films of (PEO){sub x}(LiCF{sub 3}SO{sub 3}). The greatest enhancement of conductivity was observed when a plasticizing salt (LiN[CF{sub 3}SO{sub 2}]{sub 2}) and solvent (diethyl phthalate) were combined, with the most notable improvement occurring below the melting temperature of PEO ({approx}66 C). Conductivity increased from 7.7 {times} 10{sup {minus}7} S/cm at 20 C to 4.6 {times} 10{sup {minus}5} S/cm with the addition of both plasticizers.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 142178
- Journal Information:
- Journal of the Electrochemical Society, Vol. 140, Issue 12; Other Information: PBD: Dec 1993
- Country of Publication:
- United States
- Language:
- English
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