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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Experimental studies on poly methyl methacrylate based gel polymer electrolytes for application in electrical double layer capacitors
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Experimental studies on poly methyl methacrylate based gel polymer electrolytes for application in electrical double layer capacitors

机译：用于双电层电容器的基于聚甲基丙烯酸甲酯的凝胶聚合物电解质的实验研究

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摘要

Studies have been carried out on gel polymer electrolytes comprising poly methyl methacrylate (PMMA)-ethylene carbonate (EC)-propylene carbonate (PC)-salts, LiClO4, NaClO4 and (C2H5)(4)NClO4(TEAClO(4)) with a view to using them as electrolytes in electrical double layer capacitors (EDLCs) based on activated charcoal powder electrodes. The optimum composition of gel electrolytes, PMMA (20 wt%)-EC : PC (1 : 1 v/v)-1.0 M salts exhibit high ionic conductivity of the order of similar to 10(-3) S cm(-1) at room temperature with good mechanical/dimensional stability, suitable for their application in EDLCs. The EDLCs have been characterized using linear sweep cyclic voltammetry, galvanostatic charge-discharge tests and ac impedance spectroscopy. The values of capacitance of 68-151 mF cm(-2) (equivalent to single electrode specific capacitance of 38-78 Fg(-1) of activated charcoal powder) have been observed. These values correspond to a specific energy of 5.3-10.8 Wh kg(-1) and a power density of 0.19-0.22 kW kg(-1). The capacitance values have been observed to be stable up to 5000 voltammetric cycles or even more. A comparison of studies shows the predominant role of anions of the gel electrolytes in the capacitive behaviour of EDLCs.
机译：对包含聚甲基丙烯酸甲酯（PMMA）-碳酸亚乙酯（EC）-碳酸亚丙酯（PC）-盐，LiClO4，NaClO4和（C2H5）（4）NClO4（TEAClO（4））的凝胶聚合物电解质进行了研究希望将它们用作基于活性炭粉末电极的双电层电容器（EDLC）中的电解质。凝胶电解质的最佳组成，PMMA（20 wt％）-EC：PC（1：1 v / v）-1.0 M盐具有高离子电导率，大约相当于10（-3）S cm（-1）在室温下具有良好的机械/尺寸稳定性，适用于EDLC。 EDLC已使用线性扫描循环伏安法，恒电流充放电测试和交流阻抗谱进行了表征。已观察到电容值为68-151 mF cm（-2）（相当于活性炭粉的单电极比电容为38-78 Fg（-1））。这些值对应于5.3-10.8 Wh kg（-1）的比能和0.19-0.22 kW kg（-1）的功率密度。已经观察到，电容值在5000个伏安循环甚至更多的时间内都是稳定的。比较研究表明，凝胶电解质中阴离子在EDLC电容行为中起主要作用。

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