Nitrogen and phosphorus co-doped cubic ordered mesoporous carbon as a supercapacitor electrode material with extraordinary cyclic stability

Cubic ordered mesoporous carbon co-doped with N and P shows a high specific capacitance of 210 F g −1 at 1.0 A g −1 and excellent retention of specific capacitance with more than 90% of initial capacitance at a high current density of 10 A g −1 and also for 3000 charge–discharge cycles.