Template-free electrochemically polymerized polypyrrole nanowires and their application in flexible solid-state supercapacitors,Polymer International

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Template-free electrochemically polymerized polypyrrole nanowires and their application in flexible solid-state supercapacitors
Polymer International ( IF 2.9 ) Pub Date : 2021-01-13 , DOI: 10.1002/pi.6187
Ruyi Chen ₁ , Jiang Zhong ₁ , Huifang Zhu ₁ , Chunmi Tang ₁ , Yongluo Qiao ₁ , Changqing Fu ₁ , Jinglan Wang ₁ , Liang Shen ₁ , Haifeng He ₁ , Fei Gao ₁

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Treated carbon cloths combined with polypyrrole (PPy) nanowires (TCC@PPyW) were fabricated by template-free electrochemical deposition of pyrrole in the presence of sodium citrate dihydrate and sodium perchlorate. The morphologies and electrochemical performances of the samples were studied using scanning electron microscopy, cyclic voltammetry, galvanostatic charge–discharge measurements and electrochemical impedance spectroscopy. The morphologies of PPy nanostructure were controlled by regulating interfacial pH, deposition time and concentration of sodium perchlorate. PPy nanorods were generated with the aid of water oxidation when the pH of pyrrole solution was 7.9, and PPy nanowires could be obtained by increasing the deposition time or the concentration of sodium perchlorate. The resulting PPy nanowires were about 100 nm in diameter and up to 600 nm in length. TCC@PPyW electrodes provided a large contact area for electrolyte, which facilitated the rapid delivery of electric charge. As a result, the TCC@PPyW electrodes exhibited a high areal specific capacitance of 841.2 mF cm⁻² at 0.4 mA cm⁻² and a high energy density of 420.6 μWh cm⁻² at a power density of 0.2 mW cm⁻². An all-solid-state flexible symmetric supercapacitor without any binder, incorporated with TCC@PPyW as electrodes and poly(vinyl alcohol)–LiCl gel as gel electrolyte, is also reported. The TCC@PPyW supercapacitor displayed excellent flexibility and rate capability. © 2021 Society of Chemical Industry

中文翻译：

无模板电化学聚合聚吡咯纳米线及其在柔性固态超级电容器中的应用

在二水柠檬酸钠和高氯酸钠存在下，通过吡咯的无模板电化学沉积制备处理过的碳布与聚吡咯（PPy）纳米线（TCC@PPyW）。使用扫描电子显微镜、循环伏安法、恒电流充放电测量和电化学阻抗谱研究了样品的形貌和电化学性能。PPy 纳米结构的形貌通过调节界面 pH、沉积时间和高氯酸钠浓度来控制。当吡咯溶液的pH值为7.9时，水氧化生成PPy纳米棒，通过增加沉积时间或高氯酸钠浓度可以得到PPy纳米线。得到的 PPy 纳米线直径约为 100 nm，长度可达 600 nm。TCC@PPyW 电极为电解质提供了大的接触面积，有利于电荷的快速传递。结果，TCC@PPyW 电极表现出 841.2 mF cm 的高面积比电容^-2在 0.4 mA cm ^-2和 420.6 μWh cm ^-2的高能量密度在 0.2 mW cm ^-2的功率密度。还报道了一种没有任何粘合剂的全固态柔性对称超级电容器，它与 TCC@PPyW 作为电极和聚（乙烯醇）-LiCl 凝胶作为凝胶电解质相结合。TCC@PPyW 超级电容器表现出出色的灵活性和倍率能力。© 2021 化学工业协会

更新日期：2021-01-13

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