Synthesizing the composites of graphene oxide-wrapped polyaniline hollow microspheres for high-performance supercapacitors
Synthesizing the composites of graphene oxide-wrapped polyaniline hollow microspheres for high-performance supercapacitors
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DOI：
10.1166/sam.2013.1637
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发表时间：
2013-11
影响因子：
0.9
通讯作者：
Mancheng Liu;Xi-lin Wu;Changlun Chen;Qi Wang;T. Wen;Xiangke Wang
中科院分区：
文献类型：
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作者：
Mancheng Liu;Xi-lin Wu;Changlun Chen;Qi Wang;T. Wen;Xiangke Wang
通过简单的自组装方法制备了氧化石墨烯包裹聚苯胺（PGO）空心微球复合材料。在静电相互作用的驱动下，通过简单的铜（II）催化过程制备的聚苯胺（PANI）中空微球被氧化石墨烯（GO）片完全包裹。还制备了具有不同PANI/GO片材重量进料比的复合材料，并通过不同的方法进行表征。电化学测试表明，PGO复合材料的电化学性能在很大程度上取决于聚苯胺与GO片的质量比。与PANI和其他PGO复合物电极材料相比，PGO 20复合物在5 mV/s扫描速率下具有最高的比电容（731.2F/g）和良好的充放电循环稳定性（2000次循环后保留95%的电容）。PGO复合材料的电化学性能的显著改善归因于导电聚苯胺空心微球和GO片之间的协同效应。PGO复合材料具有良好的电化学性能，在高性能超级电容器中具有广阔的应用前景。
The novel composites of graphene oxide-wrapped polyaniline (PGO) hollow microsphere have been synthesized through a facile self-assembly method. Driven by the mutual electrostatic interactions, the polyaniline (PANI) hollow microspheres prepared by a simple copper(II)-catalyzed process are fully wrapped by graphene oxide (GO) sheets. The composites with various weight feed ratios of PANI to GO sheets are also fabricated and characterized by different methods. The electrochemical tests show that the electrochemical performances of PGO composites depend largely on the mass ratios of PANI to GO sheets. Compared with the electrode materials of PANI and other PGO composites, the PGO20 composite has the highest specific capacitance of 731.2 F/g at a scan rate of 5 mV/s and good charge/discharge cycling stability (95% of the preserved capacitance is conserved after 2000 cycles). The substantially improved electrochemical performances of PGO composites are ascribed to the synergistic effects between the conductive PANI hollow microspheres and the GO sheets. The excellent electrochemical performance suggests promising application of PGO composites in high-performance supercapacitors.