碳基凝胶聚合物电解质双电层电容器的研究  

An investigations of electrochemical double-layer capacitors using activated carbon electrodes and gel polymer electrolytes

作　　者：张宝宏[1] 殷金玲[1] 孟祥利[1] 马萍[1] 

机构地区：[1]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2007年第6期705-710,共6页Journal of Harbin Engineering University

基　　金：哈尔滨工程大学基础研究基金资助项目(HEUF04064)

摘　　要：为了克服液体电解液电容器的漏液和安全问题，以活性炭作电极材料，丙烯腈作聚合物单体，分别以碳酸丙烯酯＋碳酸乙烯酯、碳酸二甲酯＋碳酸乙烯酯和碳酸甲乙酯＋碳酸乙烯酯的混合液作增塑剂，高氯酸锂为支持电解质盐，采用内聚合法制备了PAN基凝胶聚合物电解质双电层电容器（GPE_EDLCs）．采用交流阻抗法测量了凝胶聚合物电解质（GPE）的离子电导率．采用交流阻抗、循环伏安、恒流充放电等测试方法研究了GPE-EDLCs的性能，并与有机电解液双电层电容器（LOE—EDLCs）进行了比较．结果表明，PAN基GPE的电导率在室温下为6．51～8．94mS·cm^-1，PAN基GPE—EDLCs的工作电压为2．5V，电容器的比容量为43．9～47．4F／g（i=0．5mA／cme）．能骨密序曲128．8～148．1J／g．与LOE-EDLCs性质相近。To resolve leakage leading to significant risks with supercapacitors made up of liquid electrolytes, polyacrylonitrile-based （PAN） gel polymer electrolyte-electric double-layer capacitors （GPE-EDLCs） are proposed. Working models were fabricated by an insitu polymerization method using activated carbon electrodes. A mixture of propylene carbonate and ethylene carbonate, dimethyl carbonate and ethylene carbonate, ethylmethylene carbonate and ethylene carbonate were used as plasticizers, respectively. Lithium perchlorate was used as a supporting electrolyte. The ionic conductivities of the PAN-based gel polymer electrolyte （GPE） were evaluated by AC impedance. The GPE-EDLC＇s properties were evaluated by experi- mental measurements of the impedance spectrum, cyclic voltammetry, and constant current charge/dis- charge rate and capacity. Results show that the ionic conductivities of various gels are in the order of 6.51 -8.94 mS · cm^-1 at ambient temperatures. The working voltage of the PAN-based GPE-EDLCs reached 2.5 V. The specific capacitance ranged as high as 43.9~47.4 F/g（i=0.5 mA/cm^2） and the energy density was 128.8~148.1J/g. These values approach those of LOE-EDLCs.

关 键 词：双电层电容器 凝胶聚合物电解质 聚丙烯腈 增塑剂 活性炭 

分 类 号：TM912.9[电气工程—电力电子与电力传动]