In situ activation graphitization to fabricate hierarchical porous graphitic carbon for supercapacitor

Abstract In situ activation–graphitization method based on the atomically dispersed K and Fe in organic salts is developed to synthesize hierarchical porous graphitic carbon by directly pyrolysis potassium citrate iron citrate. Moreover, (NH 4 ) 2 C O also employed as both N dopant porogen open up internal structure regulate pore structure. The inside-out activation leads homogeneous reaction interconnected with few dead pores. Accompanied high specific surface area, appropriate distribution, good conductivity, N/O functional groups, sample exhibits capacitance of 322.6 F g −1 at 0.5 A , rate capability, excellent cycling stability 101.5% retention after 15,000 cycles. supercapacitor shows an energy density 21.3 W h kg 456.7 1 M Na SO . Easy synthesis, cost-effective, environmentally benign, work provides a promising strategy produce applied storage.