关键词： 超支化聚合物, 点击化学, 聚合物电解质, 导电性

Abstract: Hyperbranched polymer with rigid structure usually have good solubility, low viscosity and outstanding mechanical properties, which could be used to prepare solid electrolyte. Hyperbranched polytriazole (hb-GPTA) was synthesized due to azide-acetylene click chemistry reaction of alkynyl-based monomer M1 and azido-contained monomer M2 with catalysis by Cu(I). The hb-GPTA exhibited good solubility, film formation property, and thermostability (the thermal decomposition temperature is 35 ℃). The hb-GPTA was doped with LiTFSI and Zn(OTf)2 respectively to prepare solid electrolytes whose electrochemical properties were characterized. The results demonstrated that LiTFSI doped polymer had higher conductivity of 3.27×10-5 S/cm and the electrochemical window is 5.2 V, while the Zn(OTf)2 doped polymer exhibited lower conductivity of 4.20×10-7 S/cm but remained stable within the voltage range of -1~ 6V. It could be inferred that polymer with triazole has potential application value in making zinc batteries together with electrochemical stability analysis.

Key words: hyperbranched polymer, click chemistry, polymer electrolyte, electrical conductivity