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中文摘要：
制备了一种具有氧化还原活性的聚乙烯醇-氢氧化钾-硫氰酸钾（PVA-KOH—KSCN）凝胶电解质，用于活性炭超级电容器的研究．利用循环伏安法、恒电流充放电、交流阻抗谱等电化学测试方法进行表征．结果表明，KSCN的引入提高了电解质的电导率和电极的电容．在相同电流密度时，以PVA-KOH—KSCN为凝胶电解质的超级电容器电极比电容比以PVA-KOH为凝胶电解质的提高了约73％，达到209．48F／g，此外。超级电容器还表现出良好的循环稳定性．
英文摘要：
A redox-active polyvinyl alcohol-potassium hydroxide-potassium iodide （PVA-KOH-KSCN） gel electrolyte was obtained and was used in activated carbon-based quasi-solid-state supercapacitor. The electrocapacitive properties of the supercapacitor were e- valuated by cyclic vohammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. The introduc- tion of KI increases the ionic conductivity of electrolyte, and improves the pseudocapacitance of the electrodes. Result showed that the specific capacitance of supercapacitor was 209.48 Fig,improving about 73 % compared to the PVA-KOH system at the same current density. In addition, the supercapacitor exhibits good cycle-life stability.
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