Ultrathin Ni-Co LDH nanosheets grown on carbon fiber cloth via electrodeposition for high-performance supercapacitors

Adopting of hydroxides alone as electrode materials exhibit moderate performance due to its poor cycle stability and conductivity. In this study, an ultrathin nanostructure composed of nickel-cobalt layered double hydroxide (Ni-Co LDH) grown on carbon fiber cloth (CFC) has been prepared via a simple and efficient electrodeposition (ED) method without any binder or conductive agent, demonstrating an excellent cycle performance of Ni-Co LDH. The electrode delivers an extraordinary specific capacitance of 1540 Fg(-1) at a current density of 1 Ag-1, with excellent rate capability of 1284.5 Fg(-1) even at 15 Ag-1 as well as a great cycling stability of specific capacitance remaining 82.9% after 5000 cycles at 10 Ag-1. Then, an asymmetric supercapacitor (ASC) device, with Ni-Co LDH as the positive electrode and rGO as the negative one, shows a perfect electrochemical performance. It is believed that in the future, this kind of electrode material will have a widespread application within the realm of electrochemical energy storage.