Benzoate anions-intercalated cobalt-nickel layered hydroxide nanobelts as high-performance electrode materials for aqueous hybrid supercapacitors

•One-dimensional B-CoNi-LHSs nanobelts were synthesized by using the co-precipitation method.•The optimized electrode showed a high specific capacity of 570 C·g−1 at 1 A·g−1.•The B-CoNi-LHSs//AC device delivered a high energy density of 31.7 Wh·kg−1 at power density of 780 W kg−1.•The device exhibited a remarkable cyclic stability (89.98% over 10,000 cycles).