Polypyrrole (PPy) decorated on reduced graphene oxide (rGO) films is successfully prepared with pyrrole (Py) monomers and rGO through one-step combining oxidation with polymerization reaction. Compared with the pure individual components, rGO/PPy compound turns out better electrochemical characteristics owing to the introduction of rGO sheets, which improves the specific surface area and the conductivity of composite material. When the amount of rGO is 10% of the total, the rGO/PPy compound delivers the best capacitance of 389.3 F g⁻¹ at 1.0 A g⁻¹ in a three-electrode system and 266.8 F g⁻¹ at 0.25 A g⁻¹ in the symmetric supercapacitor system. In addition, asymmetric device (rGO/PPy//AC) has been successfully fabricated using optimized rGO/PPy compound as positive electrode, activated carbon as negative electrode (AC) and 1 M Na₂SO₄ aqueous solution as electrolyte. The device obtains long cycle stability under the high-voltage region from 0 to 1.6 V, meanwhile displaying the satisfied energy density of 19.7 Wh kg⁻¹ at 478.1 W kg⁻¹. Besides, the rGO/PPy//AC device presents satisfactory rate capability and long life time.

中文翻译：

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还原的氧化石墨烯/聚吡咯复合材料：用于高性能对称/不对称超级电容器的先进电极

通过吡咯（Py）单体和rGO通过一步氧化与聚合反应相结合的方法成功地制备了在氧化石墨烯（rGO）薄膜上修饰的聚吡咯（PPy）。与纯单组分相比，rGO / PPy化合物由于引入了rGO片而具有更好的电化学特性，从而改善了复合材料的比表面积和导电性。当RGO的量为总的10％时，RGO /聚吡咯化合物提供的389.3 F G最好电容^-1 1.0 A G ^-1在三电极系统和266.8 F G ^-1在0.25 A克^{- 1个}在对称超级电容器系统中。此外，已经成功地使用优化的rGO / PPy化合物作为正极，活性炭作为负极（AC）和1 M Na ₂ SO ₄水溶液作为电解质成功地制造了不对称器件（rGO / PPy // AC）。该器件在0至1.6 V的高压区域内获得了长期的循环稳定性，同时在478.1 W kg ^-1时显示出19.7 Wh kg ^-1的满意能量密度。此外，rGO / PPy // AC设备具有令人满意的速率能力和较长的使用寿命。