A g -1 found to be 367 F g -1 in 6 M KOH solution which is relatively superior than CNT@CNF without N-doping (264 F g -1 ). This is because the SBET of N-doped CNT@CNF hybrid found to be 204 m 2 g -1 which is larger than CNT@CNF hybrid in absence of N-doping (114 m 2 g -1 ).