The electrochemical performances were evaluated in 3 M KOH aqueous electrolyte by the symmetric two-electrode system, through which the maximum specific capacitance of 256 F g -1 at 0.05 A g -1 , together with ~86.3% of the initial capacitance at 2.5 A g -1 , and cycling stability with 95.4% after 10,000 cycles at 50 mA g -1 was observed for TAC3 electrode. TAC2, and TAC4 electrodes displayed only ~79.8, and ~66.9 % capacitance retention at 2.5 A g -1 ,