Supercapacitor three-dimensional porous composite film 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 Effect of reaction area and performance improvement

Active Publication Date: 2011-12-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The specific capacitance of carbon-based active materials in traditional supercapacitors is only 110-200F/g, and its energy density is lower than 20Wh/kg, and the ener

Method used

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  • Supercapacitor three-dimensional porous composite film and preparation method thereof
  • Supercapacitor three-dimensional porous composite film and preparation method thereof
  • Supercapacitor three-dimensional porous composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Weigh 100g of ammonium chloride and 20g of nickel chloride respectively and place them in a beaker, then add 1000mL of deionized water, and stir until completely dissolved to form a nickel-containing salt electrolyte. Then transfer the nickel-containing salt electrolyte to an electrochemical double-electrode system, wherein the nickel foil is the first working electrode, and the platinum sheet is the first auxiliary electrode. Apply a cathodic current density of 1.5A / cm on the first working electrode 2 , reacted for 60 s, and deposited on the nickel foil using the hydrogen generated by the cathode as a template to obtain a three-dimensional porous nano-nickel film. SEM, TEM and XRD analyzes were carried out on the obtained three-dimensional porous nano-nickel film, and its scanning electron microscope and local enlarged pictures are shown in figure 1 with 2 As shown, it can be seen that in the three-dimensional porous nano-nickel film, the large pores range from 6 to ...

Embodiment 2

[0025] Weigh 200g of ammonium chloride and 20g of nickel chloride respectively and place them in a beaker, then add 1000mL of deionized water, and stir until completely dissolved to form a nickel-containing salt electrolyte. Then transfer the nickel-containing salt electrolyte to an electrochemical double-electrode system, wherein the nickel foil is the first working electrode, and the platinum sheet is the first auxiliary electrode. Apply a cathodic current density of 2A / cm on the first working electrode 2 , reacting for 120s, using the hydrogen generated by the cathode as a template, depositing on the nickel foil to obtain a three-dimensional porous nano-nickel film. The three-dimensional porous nano-nickel thin film has a large pore range of 7-13 μm, a small pore range of 110-550 nm, and a film thickness of 115 μm.

[0026] Weigh 180g of cobalt nitrate and 5g of sodium nitrate and dissolve them in 1000mL of deionized water, and stir until completely dissolved to form a cob...

Embodiment 3

[0028] Weigh 300g of ammonium chloride and 20g of nickel chloride respectively and place them in a beaker, then add 1000mL of deionized water, and stir until completely dissolved to form a nickel-containing salt electrolyte. Then transfer the nickel-containing salt electrolyte to an electrochemical double-electrode system, wherein the nickel foil is the first working electrode, and the platinum sheet is the first auxiliary electrode. Apply a cathodic current density of 3A / cm on the first working electrode 2, reacting for 180s, using the hydrogen generated by the cathode as a template, depositing on the nickel foil to obtain a three-dimensional porous nano-nickel film. The three-dimensional porous nano-nickel thin film has a large pore range of 8-11 μm, a small pore range of 150-480 nm, and a film thickness of 196 μm.

[0029] Weigh 360g of cobalt nitrate and 10g of sodium nitrate and dissolve them in 1000mL of deionized water, and stir until completely dissolved to form a cob...

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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.

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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Application Information

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IPC IPC(8): H01G9/04
CPCY02E60/13
Inventor 夏新辉涂江平麦永津王秀丽谷长栋
Owner ZHEJIANG UNIV
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