Templated preparation of hierarchically porous nitrogen-doped carbon electrode material via a mild phase inversion route for high-performance supercapacitor

摘要: Abstract By using poly (vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) as the template, a kind of nitrogen-doped carbon monolith with well-distributed hierarchical pores was prepared through modified phase–inversion method. Due to hierarchically porous structure and proper doping level, synthesized electrode material delivered superior specific capacitances (312.2 F g−1 at 0.5 A 217.6 20 g−1), well remarkable energy power (7.1 Wh kg−1 250 W kg−1). More significantly, its high chemical structural stability allow it reach 109.7% original capacitance after 10,000 charge-discharge cycles current density g−1. The simple yet efficient synthetic strategy, unique structure, thus enhanced electrochemical capacitive performances not only make promising for storage devices, but also bring new ideas controllable preparation polymer-derived materials.