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首页> 外文期刊>Journal of materials science >Facile synthesis and characterization of three-dimensional graphene/polyaniline composites with enhanced electrochemical properties
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Facile synthesis and characterization of three-dimensional graphene/polyaniline composites with enhanced electrochemical properties

机译：具有增强的电化学性能的三维石墨烯/聚苯胺复合材料的简便合成和表征

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摘要

In situ polymerization of aniline was carried out within graphene hydrogels with the ultrasonic treatment, and thus the polyaniline (PANI) was loaded and the three-dimensional (3D) graphene/PANI aerogel composite (GPA) was facilely obtained after freeze drying. The investigation shows that the polyaniline as twisted nano-rods was formed and scattered in the interconnected porous 3D graphene. When a supercapacitor electrode was fabricated with the composite GPA, the specific capacitance at a current density of 1A g(-1) can reach as high as 618F g(-1). The capacity retains 89% of the initial value in constant current charge-discharge mode (at the current density of 10A g(-1)) after 2000 cycles. The improved electrochemical properties were confirmed to be resulted from the unique network morphology, enhanced conductivity and the synergy effect between graphene and polyaniline. The composite GPA is self-supporting and can be directly used as the electrode material without adding binders. This contribution provides a simple method to prepare the electrode material with enhanced electrochemical properties based on graphene. The GPA composite shows great potential for application in supercapacitors.
机译：通过超声处理在石墨烯水凝胶中进行苯胺的原位聚合，从而加载了聚苯胺（PANI），冷冻干燥后可轻松获得三维（3D）石墨烯/ PANI气凝胶复合材料（GPA）。研究表明，聚苯胺作为扭曲的纳米棒形成并散布在互连的多孔3D石墨烯中。用复合GPA制造超级电容器电极时，电流密度为1A g（-1）时的比电容可高达618F g（-1）。在2000次循环之后，在恒定电流充放电模式下（在10A g（-1）的电流密度下），容量保留了初始值的89％。证实改善的电化学性能归因于独特的网络形态，增强的电导率以及石墨烯与聚苯胺之间的协同效应。复合GPA是自支撑的，无需添加粘合剂即可直接用作电极材料。该贡献提供了一种简单的方法来制备基于石墨烯的具有增强的电化学性能的电极材料。 GPA复合材料显示出在超级电容器中的巨大应用潜力。

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  • 来源
    《Journal of materials science》 |2019年第7期|6650-6659|共10页
  • 作者

    Li Jinhuan; Ren Jiahui; Xu Yanfang; Ji Huanmin; Zou Xuexue;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Mat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Mat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Mat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Mat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Mat Sci & Technol, Nanjing 210016, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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