The invention discloses a
zinc cobaltate
nanosheet array / foamed
nickel combined
electrode, a preparation method and application of the
zinc cobaltate
nanosheet array / foamed
nickel combined
electrode, and belongs to the technical field of
energy storage. The preparation method particularly comprises the steps of dissolving
zinc nitrate,
cobalt nitrate,
ammonium fluoride and
urea into a mixing solution composed of deionized water and
alcohol (one or more kinds of methyl
alcohol, ethyl
alcohol or
isopropyl alcohol), evenly mixing, then immersing foamed
nickel into the solution, carrying out
hydrothermal reaction, and obtaining the zinc cobaltate
nanosheet array / foamed nickel combined
electrode after natural cooling, washing
drying and
calcination.
Zinc cobaltate nanosheets obtained through the preparation method perpendicularly or slantly grow on the surface of the foamed nickel and are firmly combined with the foamed nickel, the zinc cobaltate nanosheets and the foamed nickel are mutually connected to form a nanosheet array, therefore, the contact areas between an
electrolyte and the nanosheets are increased, and the stability of the nanosheet array and the stability of the whole electrode are further improved. When the zinc cobaltate nanosheet array / foamed nickel combined electrode is tested as the work electrode of a
supercapacitor, the high specific
capacitance and the
cycling stability can still be achieved under the large
current density condition.