Active carbon/nickel cobaltate nano wire composite electrode material and preparation method thereof

Abstract

The invention discloses an active carbon / nickel cobaltate nano wire composite electrode material and a preparation method thereof. The nickel cobaltate nano wire has a puffy structure and covers the surface of the active carbon, thereby forming an active / carbon cobaltate nano wire composite electrode material with a core shell structure. The preparation method comprises the steps of cleaning the active carbon by means of dilute hydrochloric acid, washing the cleaned active carbon by means of deionized water, and performing drying for standby; dissolving soluble nickel salt and soluble cobalt salt in the deionized water for preparing mixed metal salt solution; placing the active carbon into the mixed metal salt solution, adding oxalic acid, mixing to uniform and adding ammoniacal liquor for adjusting pH value, thereby obtaining precursor solution; and transferring the precursor solution into a hydrothermal reaction vessel for realizing reaction, then performing filtering, washing, drying and sintering, thereby obtaining a finished product. The active carbon / nickel cobaltate nano wire composite electrode material has advantages of puffy structure, large specific surface area, sufficient contact with electrolyte and short electrolyte ion migration path.

Description

technical field

[0001] The invention relates to the fields of materials and electrochemistry, in particular to an activated carbon / nickel cobaltate nanowire composite electrode material and a preparation method thereof. Background technique

[0002] As a new type of energy storage device, supercapacitors are widely used in lighting, electronics, electricity, communications, automobiles and other fields due to their irreplaceable advantages. Due to its good cycle performance, fast charging, good power performance, and low cost of use, supercapacitors have great potential as a new type of mobile power supply and electric vehicle power supply, and are expected to gradually replace lithium batteries. However, compared with lithium batteries, the energy density of supercapacitors is low, only one tenth of that of lithium batteries. Therefore, how to increase the energy density of supercapacitors has always been a research hotspot. The energy density of a supercapacitor depends ...

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