The present invention relates to electrochromic devices and compositions that include a polymer that includes residues of, or a polymerizable composition that includes, ((meth)acrylate-amine cation bis(substituted-sulfonyl)imide anion)) monomer represented by the following Formula (I), With reference to Formula (I): R1 is in each case independently hydrogen or methyl; R2 is in each case independently a single bond, a divalent linear or branched alkane, or divalent linear or branched cycloalkane; Y+ is in each case independently an amine cation, such as for example —N(R3)(R4)(R5)+; and X− is a bis(substituted-sulfonyl)imide anion represented by the following Formula (II),