Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University (IUPUI), Indianapolis, Indiana 46202, United States.
ACS Appl Mater Interfaces. 2013 Apr 10;5(7):2685-91. doi: 10.1021/am4001634. Epub 2013 Mar 22.
Graphene/polyaniline (PANI) nanocomposites were prepared by reducing graphene oxide with hydrazine in the presence of different amounts of polyaniline nanoparticles. In situ cryo-transmission electron microscope (TEM) images of a graphene oxide (GO)/PANI solution revealed that the PANI nanoparticles were anchored on the surface of the GO sheets. During the reduction, the as-adsorbed PANI nanoparticles were sandwiched between layers of graphene sheets. These PANI nanoparticles acted as spacers to create gaps between neighboring graphene sheets, resulting in a higher surface area compared to pure graphene. Graphene/PANI nanocomposites exhibited the high specific surface area of 891 m2/g. Utilizing this composite material, a supercapacitor with a specific capacitance of 257 F/g at a current density of 0.1 A/g has been achieved.
石墨烯/聚苯胺（PANI）纳米复合材料是通过在不同量的聚苯胺纳米颗粒存在下，用联氨还原氧化石墨烯制备的。氧化石墨烯（GO）/聚苯胺溶液的原位低温透射电子显微镜（TEM）图像显示，聚苯胺纳米颗粒被锚定在 GO 片的表面。在还原过程中，被吸附的聚苯胺纳米颗粒被夹在石墨烯片层之间。这些聚苯胺纳米颗粒起到了隔离层的作用，在相邻的石墨烯片层之间形成了空隙，从而与纯石墨烯相比具有更高的表面积。石墨烯/PANI 纳米复合材料的比表面积高达 891 m2/g。利用这种复合材料，在电流密度为 0.1 A/g 时，超级电容器的比电容达到了 257 F/g。
