Three-dimensional porous compound film of super-capacitor and preparation method thereof

A supercapacitor, three-dimensional porous technology, applied in the direction of capacitor electrodes, capacitor parts, etc., can solve the problems of limiting high-energy and high-power supercapacitors, fast energy/power density decay, etc., to achieve good electron and ion diffusion channels, effective activity Reaction area, the effect of simple and convenient preparation method
CN102280260BInactive Publication Date: 2012-08-08ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2012-08-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a three-dimensional porous compound film of a super-capacitor and a preparation method thereof. The preparation method comprises the following steps of: reacting for 60-180 seconds by the cathodic electro-deposition method to generate a three-dimensional porous nano nickel film; reacting for 100-400 seconds to deposit by using the three-dimensional porous nano nickel film as the carrier and the cathodic electro-deposition method, compounding a cobalt hydroxide nano sheet layer on the three-dimensional porous nano nickel film and preparing the three-dimensional porous nano nickel / cobalt hydroxide nano sheet compounded film for the super-capacitor, wherein the aperture of the three-dimensional porous nano nickel layer is 5-10 microns; the distance between the sheets of the cobalt hydroxide nano sheet layers is 10-300 nm; the thickness of the compound film is 30-200 microns; and the weight ratio of the cobalt hydroxide nano sheet to the three-dimensional porous nono nickel film is 5:100 to 20:100. The compound film disclosed by the invention has high capacitance, high power, high energy density and high cycle life and has wide application prospect in the fields such as electric automobiles, communication and signal control and the like.
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Description

technical field

[0001] The invention belongs to the field of composite materials, and in particular relates to a supercapacitor metal material and transition metal compound composite film and a preparation method thereof, in particular to a three-dimensional porous nano-nickel / cobalt hydroxide nanosheet supercapacitor composite film and a preparation method thereof. Background technique

[0002] Supercapacitor is a green energy storage device whose performance is between that of batteries and traditional capacitors. It has the advantages of high power density, fast charge and discharge speed, long cycle life and wide operating temperature range. The field has broad application prospects. Supercapacitors often have ultra-high power discharge characteristics, which can be as high as 10kW / kg, but supercapacitors have been plagued by low energy density (5-40Wh / kg), and their energy density is only a fraction of that of lithium-ion batteries (120Wh / kg) One or even a few tenths o...

Claims

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