Improving the composite-structured supercapacitor assembled with Ni–Co-layered double hydroxide and polymer cement electrolyte through structural optimization

The optimized nickel–cobalt double hydroxide electrode by electrodeposition has a high specific area capacitance of 10.53 F cm −2 . Capacitors assembled using the optimized electrodes have a specific capacitance of up to 1.442 F cm −2 .