A novel material NiOOH directly grown on in-situ etched Cu(OH)2 nanowire with high performance of electrochemical energy storage

- The in-situ etched Cu(OH)2 nanowire core structure efficiently shortened the pathway for electrons transport.
- The novel shell materials NiOOH uniformly wraps each Cu(OH)2 nanowire.
- The hybrid Cu(OH)2@ NiOOH/copper-foil electrode displays excellent specific capacity of 1300 C g−1.

The 1D nanowire is prepared by in-situ etching current collector displaying faster electron transportation and better connection, plusing the directional charge transport properties, which could enable it become one of the most appropriate core of 3D core@shell structure. We apply novel nanowire-like Cu(OH)2, which is synthesized by etching copper foil, as core structure to be coated by novel NiOOH with high theoretical capacity. The fast electronic conductive core structure and promising faradic electrode material candidate material enable the Cu(OH)2@NiOOH/copper-foil electrode deliver high specific capacity of 1300 C g−1 at current density of 10 mA cm−2 and outstanding cycling stability of capacity retention of 88% after 10000 charge-discharge cycles, indicating the as-prepared Cu(OH)2@NiOOH/copper-foil electrode has potential application in electrochemical capacitors.

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