Nanometer needle-shaped cobalt-nickel sulfide/carbon paper flexible electrode and preparation method thereof

A technology of cobalt-nickel sulfide and flexible electrodes, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems affecting the energy density and power density of supercapacitors, and the complexity of high-cost preparation processes. Energy density and cycle stability, the effect of improving cycle stability and energy density, and enriching storage space

Active Publication Date: 2020-06-09
SHAANXI UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0003] In order to achieve the flexibility of supercapacitors, electroactive materials are generally constructed on the surface of metal current collectors, fabrics, paper, and polymers. However, due to the weight and conductivity of these substrates, the improvement of energy density and power density of supercapacitors is affected. ; Using highly conductive carbon fiber cloth, graphene paper, carbon nanotubes, etc. as substrate materials can greatly improve the performance of energy storage devices, but the high cost and complexity of the preparation process cannot be ignored

Method used

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  • Nanometer needle-shaped cobalt-nickel sulfide/carbon paper flexible electrode and preparation method thereof
  • Nanometer needle-shaped cobalt-nickel sulfide/carbon paper flexible electrode and preparation method thereof
  • Nanometer needle-shaped cobalt-nickel sulfide/carbon paper flexible electrode and preparation method thereof

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preparation example Construction

[0043] A kind of preparation method of nano needle cobalt nickel sulfide / carbon paper flexible electrode, comprises the following steps,

[0044] Step 1, facial tissue pretreatment,

[0045] Clean the facial tissue and dry it. The present invention adopts the disposable cotton soft cleansing tissue whose brand is Cotton Wing as an example. Its main raw material is high-quality spunlace non-woven fabric; 10) After the small pieces of cm×(2~10)cm are ultrasonically cleaned with acetone and absolute ethanol or methanol in sequence;

[0046] Step 2, electrode substrate preparation,

[0047] Wash and dry the tissue paper in an inert gas such as argon, or N 2 Under the protection of the environment, carry out high-temperature carbonization treatment at 700-1000°C, and keep it warm for 0.5-3 hours. This can increase the content of carbon fibers and stabilize the fiber strength. The carbonization process is heated from room temperature, and the heating rate is 1-10°C / min , can impr...

Embodiment 1

[0053] The first step, facial tissue pretreatment,

[0054] After cutting facial tissues into small pieces of 2cm×2cm, ultrasonically clean them sequentially with acetone and absolute ethanol, repeat three times, and place them in a drying oven to dry for later use;

[0055] In the second step, electrode substrate preparation,

[0056] Place the dried face tissue in a tube furnace under an argon atmosphere at a heating rate of 3°C / min, raise the temperature to 800°C, keep it at 800°C for 1 hour, and cool down to room temperature naturally with the furnace, and the obtained carbon paper is placed in dry box spare;

[0057] The third step, electrode preparation,

[0058] Configuration 0.0375mol / L nickel nitrate hexahydrate, 0.075mol / L cobalt nitrate hexahydrate, 0.135mol / L urea and 0.015mol / L cetyltrimethylammonium bromide mixed solution 80mL, the second step obtained Put the carbon paper in it, transfer it to the reaction kettle, and react at 120°C for 3 hours. After the rea...

Embodiment 2

[0060] The first step, facial tissue pretreatment,

[0061] Cut facial tissues into small pieces of 3cm×3cm, then ultrasonically clean them with acetone and absolute ethanol in sequence, repeat three times, and place them in a drying oven to dry for later use;

[0062] In the second step, electrode substrate preparation,

[0063] Place the dried face tissue in a small vacuum tube furnace under an argon atmosphere at a heating rate of 3°C / min, raise the temperature to 900°C, keep it at 900°C for 1 hour, cool down to room temperature naturally with the furnace, take it out and place it in a dry place. box spare;

[0064] The third step, electrode preparation,

[0065] Configuration 0.0375mol / L nickel nitrate hexahydrate, 0.075mol / L cobalt nitrate hexahydrate, 0.135mol / L urea and 0.015mol / L cetyltrimethylammonium bromide mixed solution 80mL, the second step obtained Put the carbon paper in it, transfer it to the reaction kettle, and react at 120°C for 3 hours. After the reacti...

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Abstract

The invention relates to a nano needle-like cobalt nickel sulfide/carbon paper flexible electrode and a preparation method thereof. The preparation method comprises the following steps of: step 1, carbonizing a facial tissue for 0.5-3 hours under the protection of inert gas or N2 to obtain carbon paper; 2, dissolving nickel nitrate, cobalt nitrate, urea and hexadecyl trimethyl ammonium bromide indeionized water according to a molar ratio of 1: (1-3): (2-4): (0.2-1), uniformly mixing the nickel nitrate, the cobalt nitrate, the urea the hexadecyl trimethyl ammonium bromide and the deionized water to obtain a mixed system, putting the carbon paper into the mixed system, and carrying out a first-step hydrothermal reaction at 110-130 DEG C to obtain carbon paper on which a nickel-cobalt precursor grows; and 3, cleaning the carbon paper on which the nickel-cobalt precursor grows, putting the cleaned carbon paper into a sodium sulfide solution, carrying out a second-step hydrothermal reaction at 140-180 DEG C, taking out a product, and sequentially cleaning and drying the product to obtain the nano needle-shaped cobalt-nickel sulfide/carbon paper flexible electrode. The overall weight ofthe electrode material is reduced, so that the cycling stability and energy density of a supercapacitor are improved.

Description

technical field [0001] The invention relates to the technical field of preparation of supercapacitor base materials, in particular to a nano-acicular cobalt-nickel sulfide / carbon paper flexible electrode and a preparation method thereof. Background technique [0002] As an energy storage device, supercapacitors are widely used in electronic products and hybrid vehicles due to their unique properties such as high power density, long cycle life, fast charge and discharge, high charge and discharge efficiency, high specific capacity, wide operating temperature range, and environmental protection. The field has broad application prospects. As a new type of electronic device, flexible solid-state supercapacitors have attracted more and more researchers' attention in the field of flexible, lightweight, intelligent and wearable energy storage devices, and have a very broad market potential. [0003] In order to achieve the flexibility of supercapacitors, electroactive materials ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/30H01G11/34H01G11/44H01G11/46
CPCH01G11/86H01G11/24H01G11/30H01G11/34H01G11/44H01G11/46Y02E60/13
Inventor 吴海伟毕经煊李志健庞小飞王莉李燚燚王雷孟卿君
Owner SHAANXI UNIV OF SCI & TECH
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