Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6472502 | Electrochimica Acta | 2016 | 8 Pages |
Microspherical polyaniline/graphene (PANI/G-MS) composites are synthesized using sheet-like polyaniline/graphene oxide (PANI/GO) composites as raw materials via spray-drying and chemical reduction process, in which the granulated polyaniline (PANI) is in-situ grown on the surface of graphene oxide. For PANI/G-MS composites, PANI uniformly coats on the surface of graphene which can constitute a high conductive network to accelerate electronic transmission in the composites electrode for supercapacitors. Moreover, PANI/G-MS composites form numerous channels among their spherical particles during random stacking of sheet-like PANI/GO composites via spray-drying process. Due to the special structure, the electrochemical capacitance of the as-synthesized PANI/G-MS composite reaches 596.2 and 447.5Â FÂ gâ1 at a current density of 0.5 and 20Â AÂ gâ1, respectively, indicating superior rate capability. Additionally, after 1500 cycles at a current density of 2Â AÂ gâ1, 83.7% of the initial capacitance is retained.