Conductive polymers (CPs) have potential for commercial energy storage applications because of their high electrochemical activity and low cost. However, one of the obstacles in developing CPs based supercapacitors is to overcome the capacitance degradation during the charge-discharge process, along with the poor rate performance. In this work, a unique bowl-shaped graphene/polypyrrole (PPy) nanostructure is uniformly grown on a graphite substrate by two facile electrochemical steps. The graphene is uniformly coated by PPy layers, while the thickness of the PPy layer depends on deposition time. The unique structural design for the PPy layer exhibits a significant influence on its electrochemical properties, and competitive performance is achieved by the GP-1200 based supercapacitor devices. It exhibits a maximum energy density of 5.18 mWh·cm⁻³ and a maximum power density of 250.5 mW cm⁻³, which are both comparable to values obtained from other solid-state supercapacitor devices.

导电聚合物（CPs）具有高电化学活性和低成本，因此在商业储能应用中具有潜力。然而，开发基于CP的超级电容器的障碍之一是克服充放电过程中的电容退化以及较差的速率性能。在这项工作中，独特的碗形石墨烯/聚吡咯（PPy）纳米结构通过两个简便的电化学步骤在石墨基底上均匀生长。石墨烯被PPy层均匀地覆盖，而PPy层的厚度取决于沉积时间。PPy层的独特结构设计对其电化学性能具有重要影响，而基于GP-1200的超级电容器器件可实现竞争性能。最大能量密度为5.18 mWh·cm^-3和最大功率密度为250.5 mW cm ^-3，两者均与从其他固态超级电容器器件获得的值相当。