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Application of Atmospheric-Pressure-Plasma-Jet Modified Flexible Graphite Sheets in Reduced-Graphene-Oxide/Polyaniline Supercapacitors

机译:大气压等离子射流改性柔性石墨片在氧化石墨烯/聚苯胺超级电容器中的应用

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摘要

In this study, flexible and low-cost graphite sheets modified by atmospheric pressure plasma jet are applied to reduced-graphene-oxide/polyaniline supercapacitors. Surface treatment by atmospheric pressure plasma jet can make the hydrophobic surface of graphite into a hydrophilic surface and improve the adhesion of the screen-printed reduced-graphene-oxide/polyaniline on the graphite sheets. After the fabrication of reduced-graphene-oxide/polyaniline supercapacitors with polyvinyl alcohol/H SO gel electrolyte, pseudo-capacitance and electrical double capacitance can be clearly identified by the measurement of cyclic voltammetry. The fabricated supercapacitor exhibits specific capacitance value of 227.32 F/g and areal capacitance value of 28.37 mF/cm with a potential scan rate of 2 mV/s. Meanwhile, the capacitance retention rate can reach 86.9% after 1000-cycle cyclic voltammetry test. A light-emitting diode can be lit by the fabricated reduced-graphene-oxide/polyaniline supercapacitors, which confirms that the supercapacitors function well and can potentially be used in a circuit.
机译:在这项研究中,通过大气压等离子体射流改性的柔性低成本石墨片材被用于还原氧化石墨烯/聚苯胺超级电容器。通过大气压等离子体射流进行的表面处理可以使石墨的疏水性表面变成亲水性表面,并提高丝网印刷的还原性氧化石墨烯/聚苯胺在石墨片材上的附着力。用聚乙烯醇/ H SO凝胶电解质制造氧化石墨烯/聚苯胺还原型超级电容器后,可通过循环伏安法的测量清楚地识别出假电容和双电容量。所制造的超级电容器在2 mV / s的电位扫描速率下具有227.32 F / g的比电容值和28.37 mF / cm的面电容值。同时,经过1000次循环伏安法测试,电容保持率可达到86.9%。所制造的还原性氧化石墨烯/聚苯胺超级电容器可以点亮发光二极管,这证实了超级电容器的功能良好,并有可能在电路中使用。

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