Plasticizers for Solid Polymer Electrolytes.

reportActive / Technical Report | Accession Number: ADA294856 | Open PDF

Abstract:

The ionic conductivity of a solid polymer electrolyte based on a lithium salt dissolved in a polyethylene oxide PEO host was significantly improved with the use of plasticizing agents and a lithium ion coordinating compound. Either a plasticizing salt, solvent or combinations of both were incorporated into freestanding solution-cast films of PEOxLiCF3SO3. The greatest enhancement of conductivity was observed when the plasticizing salt LiNCF3SO22 and a plasticizing solvent diethyl phthalate, dimethyl phthalate, or dimethylglycol phthalate were combined, with most notable improvement occurring below the melting temperature of PEO approx. 66 deg C. Addition of a low concentration of 6,6-dibenzyl-14-crown-4, a lithium ion coordinating compound, also improved ionic conductivity. Electrochemical stability was determined by cyclic voltammetry, showing that plasticizers were generally stable between 4.3 V and 1.5 V versus lithium. jg

Author(s):
Walker, Charles W., Jr. ; Salomon, Mark
Author Organization(s):
ARMY RESEARCH LAB FORT MONMOUTH NJ
Descriptive Note:
Technical rept. May 93-May 94,
Pagination:
0036

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARL-TR-420
Monitor Series:
ARL****
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*POLYMERS, *LITHIUM BATTERIES, *PLASTICIZERS, *SOLID ELECTROLYTES, IONS, STABILITY, OPTIMIZATION, CONDUCTIVITY, METHYL RADICALS, ELECTROCHEMISTRY, CYCLES, ETHERS, SALTS, VOLTAMMETRY, PHTHALATES, MELTING POINT, ETHYL RADICALS, POLYETHYLENE, GLYCOLS, ETHYLENE OXIDE
Field(s)/Group(s):
Polymer Chemistry, Organic Chemistry, Physical Chemistry, Plastics, Electricity and Magnetism
Keyword(s):
DIETHYL, DIMETHYL, PEO(POLYETHYLENE OXIDE), DIBENZYL, CROWN ETHER
Report Date:
1995 Feb 01