A one step processed advanced interwoven architecture of Ni(OH)₂ and Cu nanosheets with ultrahigh supercapacitor performance

Abstract

In this work, an interwoven nanoscale structure of Ni(OH) 2 and copper is successfully grown on Ni foam (NF) by using a one-step cheap chemical method. ) and outstanding cycling stability (98.5% capacitance retention after being charged/discharged at a series of current densities for 3500 cycles). Furthermore, the full cell, with Ni(OH) 2 -Cu/NF as the positive electrode and reduced graphene oxide (RGO) as the negative electrode, delivers high areal capacitances and superior energy densities especially at high rates. The involved mechanisms are analyzed and discussed.

A Ni(OH)2 nanopetals network for high-performance supercapacitors synthesized by immersing Ni nanofoam in water

“…Fig. 3 shows the high electron transparency of the nanopetals with several layers stacked together, indicating an ultrathin nature [12,34]. The high-resolution TEM image in Fig.…”

Room-temperature synthesized porous Cu(OH)2/Cu7S4 hybrid nanowires as a high-performance electrode material for asymmetric supercapacitors

“…Firstly, it is well-known that one-dimensional nanostructures (such as nanowires) of the electrode materials can accelerate the transport of electrons and ions along their longitudinal direction. This will reduce the internal resistance and increase their electrochemical performance 41 . Secondly, porous nanostructures can have large surface areas, short ion-transport distance, and more channels for fast electrolyte ion transport.…”

In Situ Construction of Ag/Ni(OH)2 Composite Electrode by Combining Electroless Deposition Technology with Electrodeposition

“…The addition of conductive materials or elements significantly improves the overall performance. Typically, graphene, Ag, Au and Cu can be combined with metal oxides/hydroxides in order to achieve a high performance owing to their high electrical conductivity [17][18][19][20]. In particular, the Ag nanostructures have been extensively studied owing to its excellent electronic conductivity and electrochemical properties.…”