Solid state lithium ion conduction in pyrrolidinium imide-lithium imide salt mixtures

The properties of the binary salt system based on mixtures of methyl ethyl pyrrolidinium bis(trifluoromethane sulfonyl) imide (P-12) and lithium bis(t rifluoromethane sulfonyl) imide (Li imide) are repor ted. The lithium conta ining mixtures were found to be more than two orders of magnitude more cond uctive than the parent P-12 phase and the 33 mol% Li imide systems showed a solid state conductivity around 1 X 10(-4) S/cm at 20 degreesC. This solid state conductivity is believed to take place in plastic crystal phases of the P-12 compound. (C) 2000 Elsevier Science B.V. All rights reserved.