Cu/Ni Keggin-based viologen complexes with water-assisted 1D proton channels for asymmetric supercapacitors

Cu/Ni Keggin viologen complexes with one-dimensional proton channels are synthesized and directly used as excellent materials for supercapacitors. The 1//AC ASC exhibits an energy density of 9.39 W h kg −1 at a power density of 6000 W kg −1 .