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电化学（中英文） ›› 2013, Vol. 19 ›› Issue (4): 361-370.  doi: 10.61558/2993-074X.2122

• 研究论文 • 上一篇    下一篇

石墨烯量子点增强聚吡咯超级电容器电极的电化学性质（英文）

吴坤，许思哲，周雪皎，吴海霞*   

  1. 上海交通大学微纳科学技术研究院，上海 200240
  • 收稿日期:2012-08-16 修回日期:2012-10-09 发布日期:2012-10-30 出版日期:2013-08-28
  • 通讯作者: 吴海霞 E-mail:haixiawu@sjtu.edu.cn
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (No. 20906055), National “973 Program” (No. 2010CB933900), and the State Key Laboratory of Bioreactor Engineering (No. 2060204).

Graphene Quantum Dots Enhanced Electrochemical Performance of Polypyrrole as Supercapacitor Electrode

WU Kun，XU Si-zhe, ZHOU Xue-jiao, WU Hai-xia*   

  1. Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2012-08-16 Revised:2012-10-09 Online:2012-10-30 Published:2013-08-28
  • Contact: WU Hai-xia E-mail:haixiawu@sjtu.edu.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (No. 20906055), National “973 Program” (No. 2010CB933900), and the State Key Laboratory of Bioreactor Engineering (No. 2060204).

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摘要： 通过将吡咯单体在低温下与石墨烯量子点进行原位聚合，获得一种全新的聚吡咯/石墨烯量子点（PPY/GQD）复合材料. 实验中采用了扫描电子显微镜（SEM）、原子力显微镜（AFM）、X射线衍射(XRD)、红外（FT-IR）和热重（TGA）对复合物的表面形貌、结构进行表征. 结果表明，吡咯单体以石墨烯量子点为软模板，以化学键的方式在石墨烯量子点的表面聚合生长成片状聚吡咯. 通过机械冷压法将粉末状PPY/GQD复合物压成圆片电极，电极的电化学测试结果表明，PPY和GQD质量比为50:1所制得的复合物的电容量为485 F·g-1，同时在两千次循环之后电容量只降低了大约2%. 通过与同比例的PG（聚吡咯/石墨烯复合材料）以及纯PPY对比，发现聚吡咯/石墨烯量子点的高比容量及优异的循环稳定性将会使其在电化学超级电容器领域中具有的潜在的应用价值.

关键词: 氧化石墨烯, 石墨烯量子点, 聚吡咯, 超级电容器

Abstract: With an objective to develop electrode materials with high specific capacitance and good stability, a completely new nanocomposite of Polypyrrole (PPY) and graphene quantum dots (GQD) was successfully obtained through in-situ polymerization of pyrrole in the presence of GQD suspension. The obtained composites with different mass ratios were characterized by X-Ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). GQD enhanced electrochemical performance of PPY and, as supercapacitor electrodes, the PPY/GQD composites with the mass ratio of PPY to GQD at 50:1 showed a competitive specific capacitance of 485 F·g-1 at a scan rate of 0.005 V·s-1. The attenuation of the specific capacitance is about 2% after 2000 cycles. The high specific capacitance and good stability of the PPY/GQD nanocomposites are promising for applications in electrochemical supercapacitors.

Key words: graphene oxide, graphene quantum dots, polypyrrole, supercapacitor

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