HMC-800 showed the long-term cycling performance by retaining 98% of the initial capacitance over 20,000 cycles. Further, the two-electrode cell was assembled using HMC-800 in 1 M LiPF6 ethylene carbonate/diethyl carbonate (EC/DEC) electrolyte, which delivered the specific capacitance of 107 F g -1 at 2 A g -1 , along with the specific energy density of about 45.33