| 聚乙烯醇-氢氧化钾-硫氰酸钾凝胶电解质在超级电容器中的应用研究 |
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| 引用本文： | 余海君,吴季怀,范乐庆,谢显斌,林幼贞,许开卿,钟欣.聚乙烯醇-氢氧化钾-硫氰酸钾凝胶电解质在超级电容器中的应用研究[J].厦门大学学报(自然科学版),2011,50(Z1):109-112. |
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| 作者姓名： | 余海君 吴季怀 范乐庆 谢显斌 林幼贞 许开卿 钟欣 |
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| 作者单位： | 华侨大学 材料物理化学研究所,环境友好功能材料教育部工程中心,福建 泉州 362021 |
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| 基金项目： | 国家自然科学基金，教育部科学技术研究重点项目 |
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| 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.
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| 关 键 词： | 准固态超级电容器 氧化还原活性凝胶电解质 法拉第准电容 双电层电容 |
A Study of Supercapacitor by Using Polyvinyl Alcohol-potassium Hydroxide-potassium Iodide Polymer Gel Electrolyte |
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| YU Hai-jun,WU Ji-huai,FAN Le-qing,XIE Xian-bin,LIN You-zhen,XU Kai-qing,ZHONG Xin.A Study of Supercapacitor by Using Polyvinyl Alcohol-potassium Hydroxide-potassium Iodide Polymer Gel Electrolyte[J].Journal of Xiamen University(Natural Science),2011,50(Z1):109-112. |
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| Authors: | YU Hai-jun WU Ji-huai FAN Le-qing XIE Xian-bin LIN You-zhen XU Kai-qing ZHONG Xin |
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| Institution: | YU Hai-jun,WU Ji-huai,FAN Le-qing,XIE Xian-bin,LIN You-zhen,XU Kai-qing,ZHONG Xin(Engineering Reseach Center of Environment-Friendly Functional Materials,Ministry of Education,Institute of Materials Physical Chemistry,Huaqiao University,Quanzhou 362021,China) |
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| Abstract: | 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 voltammetry,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 sp... |
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| Keywords: | quasi-solid-state supercapacitor redox-active gel electrolyte pseudocapacitance electrical double-layer capacitance |
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