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Flexible honeycomb bimetallic nitride supercapacitor electrode and preparation method thereof

A supercapacitor and bimetal technology, which is applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, electrolytic capacitors, etc., can solve the problems of limited nickel-cobalt nitride materials, insufficient superelectric performance, and cumbersome process. The effect of excellent cycle performance, excellent cycle stability and simple preparation process

Active Publication Date: 2021-08-17
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to a series of problems such as high cost, low mass production, cumbersome process, and insufficient superelectric performance, the application of nickel-cobalt nitride materials is still subject to many restrictions.

Method used

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  • Flexible honeycomb bimetallic nitride supercapacitor electrode and preparation method thereof
  • Flexible honeycomb bimetallic nitride supercapacitor electrode and preparation method thereof
  • Flexible honeycomb bimetallic nitride supercapacitor electrode and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A method for preparing a flexible honeycomb double metal nitride electrode, comprising the following steps:

[0039] S1. Dissolve cobalt nitrate and nickel nitrate in 30mL methanol, then add 2-methylimidazole and continue to stir for 0.5h to obtain a mixed solution; wherein, in the mixed solution, the molar concentration of cobalt nitrate, nickel nitrate, and 2-methylimidazole 10mmol / L, 10mmol / L, 40mmol / L respectively;

[0040] S2. Put the flexible porous carbon cloth into 1M hydrochloric acid, acetone, ethanol and deionized water in sequence, and after each ultrasonic cleaning for 10 min, vacuum dry at 60° C. for 12 h.

[0041] S3. Put the above mixed solution and the cleaned flexible porous carbon cloth into an autoclave in turn, and keep them warm at 120° C. for 14 hours to obtain a Ni-Co LDH / CC precursor film;

[0042] S4. Place the Ni-Co LDH / CC precursor thin film in a tube furnace, inject flowing ammonia gas into the tube furnace, raise the temperature of the tub...

Embodiment 2

[0044] A kind of preparation method of flexible honeycomb double metal nitride electrode

[0045] Compared with Example 1, the only difference is that S4 is different, specifically:

[0046] S4. Place the Ni-Co LDH / CC precursor thin film in a tube furnace, inject flowing ammonia gas into the tube furnace, raise the temperature of the tube furnace to 200 °C at a rate of 2 °C / min, and keep it for 2 hours to obtain Ni -Co-N / CC porous film.

Embodiment 3

[0048] A kind of preparation method of flexible honeycomb double metal nitride electrode

[0049] Compared with Example 1, the only difference is that S4 is different, specifically:

[0050] S4. Place the Ni-Co LDH / CC precursor thin film in a tube furnace, inject flowing ammonia gas into the tube furnace, raise the temperature of the tube furnace to 400 °C at a rate of 2 °C / min, and keep it for 2 hours to obtain Ni -Co-N / CC porous film.

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Abstract

The invention discloses a flexible honeycomb bimetallic nitride supercapacitor electrode and a preparation method, and relates to the technical field of supercapacitor electrode materials, and the preparation method comprises the following steps: dissolving cobalt nitrate and nickel nitrate in methanol, then adding 2-methylimidazole, and performing stirring to obtain a methanol solution of cobalt and nickel; sequentially putting hydrochloric acid, acetone, ethanol and deionized water into the flexible porous conductive substrate, performing ultrasonic cleaning, and performing vacuum drying; adding a flexible porous conductive substrate and a methanol solution of cobalt and nickel into an autoclave, carrying out heating reaction to obtain a Ni-Co LDH precursor sample grown on the substrate, carrying out cleaning and vacuum drying, then putting the Ni-Co LDH precursor sample into a tubular furnace, introducing a nitrogen source, carrying out heating and heat preservation reaction to obtain a Ni-Co-N porous film sample grown on the substrate, and thus obtaining the electrode. According to the invention, a solvothermal method is adopted for in-situ growth of the three-dimensional layered multistage porous honeycomb Ni-Co-N porous film on the flexible porous conductive substrate, and the porous film shows excellent cycling stability and ultrahigh rate capability when being used as a supercapacitor electrode.

Description

technical field [0001] The invention relates to the technical field of supercapacitor electrode materials, in particular to a flexible honeycomb double-metal nitride supercapacitor electrode and a preparation method. Background technique [0002] With the continuous development of society, people's demand for energy continues to increase. At the same time, due to the gradual depletion of traditional fossil fuels and the increasingly serious environmental pollution problems, it is necessary to explore and develop new environmentally friendly, green, efficient and sustainable new energy sources. become increasingly urgent. As a new type of green energy storage device, supercapacitors have the advantages of high power density, fast charging and fast discharging, good cycle stability, and green safety. , smart grid and many other fields have broad application prospects. Supercapacitors are mainly composed of electrode materials (positive and negative electrode materials), sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/46H01G11/86H01G11/22H01G11/30
CPCH01G11/22H01G11/30H01G11/86H01G11/32H01G11/46Y02E60/13
Inventor 李坤振赵邦传白金童鹏朱雪斌孙玉平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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