Self-supporting type nano-porous nickel/nickel oxide combined electrode plate and preparation method thereof

Abstract

The invention provides a self-supporting type nano-porous nickel / nickel oxide combined electrode plate and a preparation method thereof. The electrode plate is composed of a current collector and active substance, the current collector is composed of a nickel-based amorphous alloy base body and nano-porous nickel, and the active substance is nano nickel oxide which grows on the surface of the nano-porous nickel. The cross section of the electrode plate comprises three layers, the middle core layer is the nickel-based amorphous alloy base body, the surfaces of the two sides of the middle core layer are covered by combined electrode material layers composed of nano-porous nickel and nano nickel oxide, the thickness of the electrode plate is 25-35 micrometers, the thickness of each nano-porous nickel / nickel oxide combined electrode material layer is 2.1-3.5 micrometers, and the nickel-based amorphous alloy is composed of Ni40 + x (Ti0.35 Zr0.45 Al0.20) 60 - x (x=0-5). The effective specific area of active substance NiO is improved, the actual capacitance characteristic, which can be given to play in a super capacitor, of nickel oxide is improved, and the specific capacitance of the combined electrode plate can reach up to 847.9 F / cm<3>.

Description

Technical field: [0001] The invention relates to a method for preparing a nanoporous nickel / nickel oxide composite electrode material used for supercapacitors, especially pseudocapacitors, and belongs to the fields of new material technology and new energy technology. Background technique: [0002] In recent years, with the development of electric vehicles and various electronic devices, electrochemical capacitors have gradually become a research hotspot. Compared with traditional capacitors, electrochemical capacitors have higher energy density and wider operating temperature range. At the same time, it has traditional chemical Power supply can not match the high power density, long cycle life and superior pulse charge and discharge performance. [0003] It is well known that amorphous hydrated ruthenium oxide is the most promising electrode material for high-power and high-energy-density supercapacitors, but it is expensive and lacks resources, and the electrolyte used pol...

AI Technical Summary

Problems solved by technology

It not only overcomes the shortcomings of the current self-collecting electrode materials such as complex preparation process and long time consumption, but also overcomes the shortcomings of the current preparation method of nickel oxide electrode materials, such as poor dispersion of nickel oxide, poor conductivity, and the need to prepare additional electrode sheets when using , complex preparation process, high cost, not suitable for mass production, etc.

Traditional electrodes add conductive agents, binders and other substances to reduce the effective specific surface area and dispersion of active materials, and the electroactive materials are easy to fall off during use

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