Highly conjugated graphitic 3D carbon frameworks for supercapacitors with long cycling stability

摘要: Abstract Bio-inspired by mussels' adhesion, a new protocol for the fabrication of large-sized carbon electrode materials (GCFs) is achieved through an adhesive self-assembly in-situ-formed multilayered polydopamine nanospheres along with subsequent pyrolysis. The fabricated GCFs show 3D hierarchical porous architecture consisting highly graphitic carbon. These features allow rapid diffusion, high loading and effective absorbing exchanging charged ions in GCFs, which endows superior electrochemical performance. When tested as supercapacitor electrodes, exhibit volumetric capacitance 105 F cm−3 at current density 1.0 A cm−3 within potential window 0–1.0 V 0.5 M Na2SO4 solution. Meanwhile, has been assembled simple asymmetrical supercapacitor, can stably supply power to LED small fan excellent cycling stability 100% retention after 10000 charge/discharge cycles. Worthy note, due versatile ability almost all substrates, this developed provides avenues fabricate core-shell attractive future portable devices.