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Reduced graphene oxide paper based nanocomposite materials for flexible supercapacitors

机译：用于柔性超级电容器的基于石墨烯氧化物纸的纳米复合材料

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摘要

In this article, a light-weight and highly flexible supercapacitor based on cellulose fibers and reduced graphene oxide (rGO) nanocomposites electrode is designed and assembled. The reduced graphene oxide (rGO) paper was prepared from natural graphite by a modified Hummer's method, with hydroiodic acid (HI) as a reducing agent. The as-prepared rGO, which was characterized by Raman spectroscopy, XRD, TEM and SEM, was assembled into the supercapacitor. XRD and Raman spectroscopy results confirm the oxidation of graphite and reduction of graphite oxide (GO) to reduced graphene oxide (rGO) sheets. The double-layer capacitive behavior of the supercapacitor is studied by cyclic voltammetry techniques in aqueous (6 M KOH) and non aqueous room temperature ionic liquid (RTIL) electrolytes, respectively. The ionic liquid enables a larger operating voltage range of 0.0-2 V compared to 0.0-1 V in aqueous medium. The specific capacitance of the supercapacitor has been determined to be 255 F g(-1) at a scan rate of 10 mV s(-1) in an aqueous medium. In an non aqueous medium, the graphene based supercapacitor exhibits specific capacitance values of 78 F g(-1) at a scan rate of 10 mV s(-1). The supercapacitor devices exhibit excellent long cycle life, with only a 10% decrease in specific capacitance after 5000 cycles.
机译：在本文中，设计和组装基于纤维素纤维和还原的氧化物（RGO）纳米复合材料的轻重和高度柔韧的超级电容器。通过改性的悍马的方法，用改性的悍马的方法制备氧化石墨氧化物（RGO）纸，用氢碘酸（HI）作为还原剂。由拉曼光谱，XRD，TEM和SEM的特征在于制备的RGO，组装到超级电容器中。 XRD和拉曼光谱结果证实了石墨氧化和石墨氧化物（GO）的还原至还原氧化物（RGO）片材。通过循环伏安法技术在水溶液（6M KOH）和非水室温离子液（RTIL）电解质中，研究了超级电容器的双层电容性能。离子液体使得较大的工作电压范围为0.0-2V，与0.0-1V在水性介质中。已经在水性介质中以10mV S（-1）的扫描速率确定了超级电容器的比电容为255fg（-1）。在非水培养基中，基于石墨烯的超级电容器以10mV S（-1）的扫描速率显示出78f g（-1）的特定电容值。超级电容器装置具有优异的长循环寿命，在5000次循环后，特定电容仅减少10％。

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  • 来源
    《RSC Advances》 |2015年第34期|共9页
  • 作者

    Rath Tanmoy; Kundu Patit Paban;

  • 作者单位

    CIPET Bhubaneswar 751024 Orissa India;

    Univ Calcutta Dept Polymer Sci &

    Technol Kolkata 700073 W Bengal India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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