超级电容器用季铵盐凝胶聚合物电解质的制备及性能

Preparation and performance of quaternary ammonium salt gel polymer electrolyte for supercapacitor

采用溶液浇注法,以聚丙烯腈(PAN)为聚合物基体,四乙基四氟硼酸铵(TEABF_4)为电解质盐,二甲基亚砜(DMSO)为增塑剂制备PAN/TEABF_4凝胶聚合物电解质。采用红外光谱(FT-IR)、热重分析(TG-DTG)以及电导率、循环伏安和恒流充放电等电化学性能测试方法,探究不同的TEABF_4与PAN质量配比对PAN/TEABF_4凝胶聚合物电解质性能的影响。当TEABF_4与PAN质量比为0.5时所制得凝胶聚合物电解质性能最佳:电导率为5.583×10^(–3)S/cm、比电容为27.59 F/g、充放电效率为86.63%、能量密度为100.58 J/g、功率密度为0.675×103 W/kg。

PAN/TEABF4 gel ploymer electrolyte was prepared using polyacrylonitrile （PAN）, tetraethyl ammonium tetrafluoroborate （TEABF4） and dimethyl sulfoxide （DMSO） as matrix polymer, electrolyte salt and plasticizer respectively, through the solution casting technique. The effects of different mass ratios of TEABF4 to PAN on properties of PAN/TEABF4 gel polymer electrolyte were investigated by FT-IR, TG-DTG, and conductivity, cyclic voltammetry, constant current charge/discharge and other electrochemical performance. The results show that gel polymer electrolyte displays the best performance when the mass ratio of TEABF4 to PAN is 0.5： conductivity is 5.583×10^–3S /cm, the specific capacitance is about 27.59 F/g, the charge/discharge efficiency is 86.63%, the energy density is 100.58 J/g, and the power density is 0.675×10^3 W/kg.