Both systems were assembled as symmetric cells with a standard organic electrolyte, 1 M NEt4BF4 in acetonitrile. While Ni3(HITP)2 displays both specific and gravimetric capacitances exceeding YP-50F porous carbon when charged at a low current density of 0.05 A g -1 (111 F g -1 and 18 µF cm -2 compared to 100 F g -1 and 6 µF cm -2 for YP-50F across their respective double-layer voltage windows), Ni3(HITP)2 displays a number of limitations which reduce its overall performance in supercapacitors: