Abstract: A process for preparing a composition for use as a polymer electrolyte is provided which comprises mixing one or more polar materials and one or more polyesters of formula III, wherein y is from 1.5 to 80 and each unit A may be identical or different and is of the structure IV, wherein x is from 1 to 5 and each unit B may be identical or different and is of the structure V, wherein R and R1 are each, independently, hydrogen, optionally substituted hydrocarbyl or an inert functional group, wherein the mixture is prepared to contain from 1 to 50 wt. % of the one or more polar materials and from 50 to 99 wt. % of the one or more polyesters of formula III. A method for using such polymer electrolytes in cells, batteries, coulometers, displays, and smart windows is also provided.

Abstract: A composition for use as a polymer electrolyte, wherein said composition includes one or more polar materials and one or more polyesters of formula III, wherein each unit A may be identical or different and is of the structure IV, wherein each unit B may be identical or different and is of the structure V, wherein R and R1 are each, independently, hydrogen, optionally substituted hydrocarbyl or an inert functional group; a process for preparing said composition; the use of said composition as a polymer electrolyte in coulometers, displays, smart windows, cells or batteries; and a cell and/or battery having said composition.

Abstract: A composition for use as a polymer electrolyte, wherein said composition comprises one or more polar materials and one or more polyesters (polymers of carbonic acid); a process for preparing said composition; the use of said composition as a polymer electrolyte in coulometers, displays, smart windows, cells or batteries; and a cell and/or battery comprising said composition.

Abstract: ABA triblock polymers, the A block being rigid having a transition away from its rigid phase above 70.degree. C., the B block being wholly or partly ion-coordinating, elastomeric or amorphous, the B/A block length ratio being greater than 1. When the B block is complexed with an ionic salt these polymers act as polymeric electrolytes which may be used in cells etc. Preferred polymers are those where HC.dbd.CH sites in the polybutadiene segment of a polystyrene-polybutadiene-polystyrene polymer are replaced by --CH.sub.2 CH--X--(CH.sub.2 CH.sub.2 O).sub.m --R, where X is link, R is alkyl. A preferred salt is LiCF.sub.3 SO.sub.3.