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A method for preparing nickel-cobalt oxygen and sulfur compound composite film electrodes

A technology of sulfur compounds and composite films, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors to achieve the effects of small electrode internal resistance, excellent corrosion resistance and simple process

Active Publication Date: 2018-09-11
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature search found that there are few reports on composite transition metal oxygen and sulfur compound electrodes that are doped with transition metal sulfides with good conductivity to improve the conductivity of transition metal oxide electrodes.

Method used

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  • A method for preparing nickel-cobalt oxygen and sulfur compound composite film electrodes
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  • A method for preparing nickel-cobalt oxygen and sulfur compound composite film electrodes

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Embodiment 1

[0027] A method for preparing nickel-cobalt oxygen and sulfur compound thin-film electrodes. Firstly, pure iron foil is selected as the current collector substrate, and the current collector substrate with a size of 20 mm×10 mm×0.2 mm is degreased, washed, pickled and washed with water. , and then chemically plated in an alkaline nickel-cobalt-phosphorus plating solution at (82±1)°C for 30 minutes to prepare a current collector with a nickel-cobalt-phosphorus alloy coating on the surface. Energy spectrum analysis shows that Ni, Co The mass fractions of and P were 45.99%, 46.01% and 8.00%, respectively. After washing and drying the current collector, soak it in supersaturated sodium sulfide solution for 1 minute, take it out and place it in a box-type resistance furnace at 330°C for high-temperature oxidation and vulcanization for 1 hour. After taking it out and cooling it, you can get nickel-cobalt oxygen and sulfur Compound composite thin film electrodes.

[0028] as attache...

Embodiment 2

[0032] A method for preparing a nickel-cobalt oxygen-sulfur compound thin-film electrode. First, copper foil is selected as a current collector substrate, and the current collector substrate with a size of 20 mm×10 mm×0.2 mm is degreased, washed with water, pickled, and washed with water. Then electroless plating in an alkaline nickel-cobalt-phosphorus plating solution at (82±1)°C for 120 minutes to prepare a current collector with a nickel-cobalt-phosphorus alloy coating on the surface. After washing and drying the current collector, soak it in supersaturated sodium sulfide solution for 2 minutes, take it out and place it in a box-type resistance furnace at 420°C for high-temperature oxidation and vulcanization for 2 hours. After taking it out and cooling it, you can get nickel-cobalt oxygen and sulfur Compound composite thin film electrodes.

[0033] as attached Figure 4 As shown, the PARSTAT2273 electrochemical workstation was used, the Hg / HgO electrode was used as the re...

Embodiment 3

[0037] A method for preparing nickel-cobalt oxygen and sulfur compound thin-film electrodes. Firstly, pure iron foil is selected as the current collector substrate, and the current collector substrate with a size of 20 mm×10 mm×0.2 mm is degreased, washed, pickled and washed with water. , and then electroless plating in an alkaline nickel-cobalt-phosphorus plating solution at (82±1)°C for 80 minutes to prepare a current collector with a nickel-cobalt-phosphorus coating on the surface. After washing and drying the current collector, soak it in a supersaturated sodium sulfide solution for 1 minute, take it out and place it in a box-type resistance furnace at 100, 190, 300, 350, 400 and 450°C for high-temperature oxidation and vulcanization for 1 hour. After taking out and cooling, the nickel-cobalt oxygen-sulfur compound composite film electrode is obtained.

[0038] as attached Figure 7 As shown, the PARSTAT2273 electrochemical workstation was used, the Hg / HgO electrode was u...

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Abstract

The invention relates to a method of preparing a nickel cobalt oxygen and sulfur compound complex thin film electrode. High-temperature oxidation sulfidation in-situ preparation is adopted, and a current collector is a conductive material with the surface coated with a nickel-cobalt-phosphorus alloy coating. Preparation of the current collector comprises steps of oil removal, water washing, acid cleaning, water washing, nickel-cobalt-phosphorus electroless plating, water washing and drying. The high-temperature oxidation sulfidation in-situ preparation method for the complex thin film electrode comprises steps of immersion of the current collector in a saturated sulfide solution and high-temperature oxidation sulfidation. The prepared complex thin film electrode has honeycomb briquette-shaped porous structure features, and when the prepared electrode is used as a super capacitor electrode, advantages of small internal resistance, good heat resistance and corrosion resistance, high specific capacitance and high adhesion strength between the electrode material thin film and the current collector are realized. The specific capacitance of the prepared complex thin film electrode can reach 1.34 F / cm<2>. The high-temperature oxidation sulfidation in-situ preparation method provided by the invention has the advantages of less investment, simple process operation, good repeatability and facilitated industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of two-dimensional thin-film electrode materials, and in particular relates to a method for preparing nickel-cobalt oxygen and sulfur compound composite thin-film electrodes in situ by high-temperature oxidation and vulcanization. Background technique [0002] Supercapacitors are widely used in smart grids, new energy vehicles, solar and wind power generation, consumer electronics and other fields due to their high power density, good cycle stability and fast charging and discharging. Research and development of new electrode materials for supercapacitors is the main research direction in this research field. Studies have shown that transition group metal oxides have high specific capacitance and charge storage capacity, but the conductivity of transition group metal oxides is poor. In contrast, transition metal sulfides have better electrical conductivity. Literature search found that there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCY02E60/13
Inventor 方信贤杜小娟张帅高生辉
Owner NANJING INST OF TECH
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