Developing Rigid Polymer Electrolytes

Report No. ARL-RP-188
Authors: James F. Snyder
Date/Pages: September 2007; 8 pages
Abstract: This report is a reprint of a paper published in Polymer Preprints, Vol. 45, No. 2, by the American Chemical Society in Fall 2004. The focus of this research is the synthesis and characterization of highly conductive rigid polymer electrolytes. Traditional solvent-free polymer electrolytes allow for long-range ion diffusion by means of ion-polymer coupling in the amorphous phase of the polymer host. Coupled systems typically require low glass transition temperatures for fast ion diffusion, resulting in poor mechanical properties when fillers are not added. The effort described here explores polymer electrolytes in which ion diffusion is decoupled from polymer motion. These materials allow for the development of polymers with desirable structure and fast ion transport at low temperatures. This is accomplished through the design of high dielectric polymer hosts with large internal free volume. The recently reported step polymerization using vinylene carbonate and oxalic acid derivatives was modified to eliminate the formation of a dominant byproduct, and extended to include more robust but less reactive monomers, including derivatives of 3-sulfolene, maleimide, and malonic acid.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2007