Hyperbranched poly(triazole) with tertiary amine moiety and longer flexible polyethylene glycol (PEG) terminal group (hb-PTA-PEG) was synthesized by successive Cu(I)-catalyzed azide-alkyne cycloaddition polymerization, and the corresponding hyperbranched poly(triazolium)s containing hybrid quaternary ammonium ion, [hb-PTA-PEG](+)[I](-) and [hb-PTA-PEG](+)[TFSI](-), were obtained after N-alkylation and anion exchange reactions. These hyperbranched polymers presented broad electrochemical stability window of above 6.0 V versus Ag+/Ag and 53 V versus Li+/Li, and displayed low glass transition temperature in the range of -13 to -37 degrees C, owing to the hyperbranched structure combined with the hybrid ionic moiety and longer flexible PEG end-group. The ionic [hb-PTA-PEG](+) [TFSI](-) showed superior ionic conductivity, which was above 10(-5) S cm(-1) at 30 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.