Nickel hydroxide nanosheet thin-film material as well as preparation method and application thereof

A technology of nickel hydroxide and thin film materials, which is applied in the direction of nickel oxide/nickel hydroxide, capacitors, electrical components, etc., and can solve the problems of difficulty in controlling the size and distribution of particle size, residual impurities on the surface, and poor crystallinity of products, etc. problem, to achieve the effect of large capacitance, simple method and low cost

Inactive Publication Date: 2013-01-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These nickel hydroxide preparation methods are widely adopted, but they all have certain obvious limitations, as some require relatively high synthesis temperature, some products have poor crystallinity, and impurities are easy to remain on the surface; some have obvious effects on the environment pollution; some are not easy to realize the control of particle size and distribution

Method used

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  • Nickel hydroxide nanosheet thin-film material as well as preparation method and application thereof
  • Nickel hydroxide nanosheet thin-film material as well as preparation method and application thereof
  • Nickel hydroxide nanosheet thin-film material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a. Take the foam nickel sheet, put it into hydrochloric acid for ultrasonic washing, then transfer it to deionized water and ethanol, and ultrasonically wash it respectively;

[0028] b. prepare a solution with a nickel nitrate hexahydrate concentration of 0.125 mol / L and a hexamethylenetetramine concentration of 0.25 mol / L, and fully stir to obtain a homogeneous and stable solution;

[0029] c. Place the nickel foam sheet obtained in step a obliquely into a 40 ml autoclave with PTFE lining, and then transfer the solution in step b to the reaction kettle for 10 hours at 100°C with hydrothermal treatment. After the reaction is completed Cool to room temperature with cooling water, the cooling time is less than 15 minutes;

[0030] d. take out the nickel sheet in the reactor, rinse with water and ethanol, and finally ultrasonically clean in water and ethanol respectively;

[0031] e. Put the product obtained in step d into a 100°C oven for 6 hours to obtain a nickel hydr...

Embodiment 2

[0034] a. Take the foam nickel sheet, put it into hydrochloric acid for ultrasonic washing, then transfer it to deionized water and ethanol, and ultrasonically wash it respectively;

[0035] b. Prepare a solution with a nickel nitrate hexahydrate concentration of 0.05 mol / L and a hexamethylenetetramine concentration of 0.05 mol / L, and fully stir to obtain a homogeneous and stable solution;

[0036] c. Place the nickel foam sheet obtained in step a obliquely into a 40 ml autoclave with PTFE lining, and then transfer the solution in step b to the reaction kettle for 48h at 140°C with hydrothermal treatment. After the reaction is completed Cool to room temperature with cooling water, the cooling time is less than 15 minutes;

[0037] d. take out the nickel sheet in the reactor, rinse with water and ethanol, and finally ultrasonically clean in water and ethanol respectively;

[0038] e. Put the product obtained in step d into a 100°C oven for 6 hours to obtain a nickel hydroxide ...

Embodiment 3

[0041] a. Take the foam nickel sheet, put it into hydrochloric acid for ultrasonic washing, then transfer it to deionized water and ethanol, and ultrasonically wash it respectively;

[0042] b. Prepare a solution with a nickel nitrate hexahydrate concentration of 0.25 mol / L and a hexamethylenetetramine concentration of 0.5 mol / L, and fully stir to obtain a homogeneous and stable solution;

[0043] c. Place the nickel foam sheet obtained in step a obliquely into a 40 ml autoclave with PTFE lining, and then transfer the solution in step b to the reaction kettle for 6 hours at 70°C with hydrothermal treatment. After the reaction is completed Cool to room temperature with cooling water, the cooling time is less than 15 minutes;

[0044] d. take out the nickel sheet in the reactor, rinse with water and ethanol, and finally ultrasonically clean in water and ethanol respectively;

[0045]e. Put the product obtained in step d into a 100°C oven for 6 hours to obtain a nickel hydroxide...

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Abstract

The invention discloses a nickel hydroxide nanosheet thin-film material as well as a preparation method and application thereof, and belongs to the technical field of nanometer thin-film materials and the technical field of chemical energy storage. Nickel hydroxide nanosheets vertically and sequentially grow on a foam nickel base, wherein the particle size of the nickel hydroxide nanosheets is 0.7-1.5 microns and the thickness is 5-9 nanometers. The preparation method comprises the following steps of: respectively placing foam nickel base sheets in hydrochloric acid, ionized water and ethanol for ultrasonic washing, dissolving soluble nickel salt and hexamine in deionized water to obtain clear solution, obliquely placing the foam nickel sheets in a reaction still, transferring the nickel salt and hexamine solution to the reaction still to carry out hydrothermal reaction, cooling to room temperature by using cooling water after the reaction, taking the foam nickel sheets out from the reaction still for cleaning via water and ethanol, and placing the products in a dryer until the products are dried. The integrated product has large capacitance value (range: 1500-3000F/g or 5-12F/cm<2>), can be well kept under high-current density and has good cycle performance, so that the integrated product is a super capacitor material with huge application prospect.

Description

technical field [0001] The invention relates to a nickel hydroxide nano-sheet thin film material, a preparation method and application thereof, and belongs to the technical field of inorganic advanced nano-membrane materials. Background technique [0002] Supercapacitors have the advantages of high power density, high energy density, long cycle life, no pollution to the environment, and the ability to operate under low pressure [China Science and Technology Information, 2010, 17: 36], and is expected to become a new technology in the 21st century. New type of green energy. It is well known that amorphous hydrated ruthenium oxide is the most promising electrode material for high-power and high-energy-density supercapacitors, but it is expensive and lacks resources [Nano Lett. business development. Nickel hydroxide has the advantages of excellent electrochemical performance and relatively low price, and has recently attracted extensive research and attention in the field of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/042C01G53/04
CPCY02E60/13
Inventor 孙晓明陆之毅常铮朱炜段雪
Owner BEIJING UNIV OF CHEM TECH
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