Facile and scalable fabrication of three-dimensional Cu(OH)₂nanoporous nanorods for solid-state supercapacitors

Abstract

3-D Cu(OH)2nanoporous nanorods are fabricated by a facile and scalable one-step anodization method for high-performance binder-free solid-state supercapacitors.

Copper Hydroxide Porous Nanotube Arrays Grown on Copper Foils as High-Performance Integrated Electrodes for Supercapacitors

“…The CH can be cycled in an alkaline electrode where the charge storage takes place via reversible redox between Cu 2+ /Cu + states. The supercapacitive properties of CH/Cu electrode modified by NT appear similar but superior to other nanostructures ,. As shown in Figure a, the electrochemical properties of the as‐prepared CH/Cu electrode was measured in 1 M NaOH aqueous electrolyte at potential interval from 0 to 0.65 V in a three‐electrode system.…”

Sodium‐Salt‐Promoted Growth of Self‐Supported Copper Oxides with Comparative Supercapacitive Properties

“…Copper oxides have been extensively studied in energy storage devices including supercapacitors and lithium‐ion batteries, because of their ease of preparation, low environmental impact and high electrochemical activity . In order to improve the electrode's performance, self‐supported materials have been created by directly growing the active material on the surface of the current collector ,.…”

“…This creates both a larger reactive surface area and a continuous electron transfer pathway, from the electrolyte to the active film and then to the conductive current collector, thus offering highly efficient electron transport kinetics ,,. Inspired by this idea, self‐supported copper oxides with different morphologies including 1D nanotubes/nanorods,,,, 2D nanosheets,, and nanofilms,, have been fabricated using various synthesis systems. Despite the versatility demonstrated by the reported preparation methods, most of these systems required the input of a certain copper salt precursor, such as copper nitrate,,, copper acetate .…”

A Binder-Free Hybrid of CuO-Microspheres and rGO Nanosheets as an Alternative Material for Next Generation Energy Storage Application

“…Although, EDLCs can be operated at much higher rates than batteries, their energy densities are relatively lower. An alternative strategy to enhance the energy density can be to construct hybrid supercapacitors, where one pseudocapacitive electrode replaces carbon electrodes, which can store more charges via fast and reversible faradaic redox reactions and higher energy density can be achieved due to the enhanced capacitance. Such types of supercapacitor involve both physical as well as chemical charge storage mechanism resulting in superior performance in terms of cyclic stability, energy density and power density .…”

“…An alternative strategy to enhance the energy density can be to construct hybrid supercapacitors, where one pseudocapacitive electrode replaces carbon electrodes, which can store more charges via fast and reversible faradaic redox reactions and higher energy density can be achieved due to the enhanced capacitance. Such types of supercapacitor involve both physical as well as chemical charge storage mechanism resulting in superior performance in terms of cyclic stability, energy density and power density . Recent literature reports several methods for the fabrication process of CuO‐carbon materials as composite for enhanced capacitance owing to promotional effects of carbon nanomaterials .…”