Preparation method of supercapacitor taking laminar nickel aluminum and hydrotalcite nanomaterial as positive electrode

A nickel-aluminum hydrotalcite and supercapacitor technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, nanotechnology, etc., can solve the problems of low energy density of supercapacitors, and achieve stable structure, large specific surface area, and high power The effect of increasing density and energy density

Inactive Publication Date: 2016-11-23
四川英能基科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to: aim at the problems existing in the prior art, to provide a kind of preparation method of the supercapacitor with lamellar nickel-aluminum hydrotalcite nanomaterial as the positive electrode, the prepared supercapacitor has good electrochemical performance, has very high Energy density, overcome the shortcomings of low energy density of existing supercapacitors

Method used

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  • Preparation method of supercapacitor taking laminar nickel aluminum and hydrotalcite nanomaterial as positive electrode
  • Preparation method of supercapacitor taking laminar nickel aluminum and hydrotalcite nanomaterial as positive electrode
  • Preparation method of supercapacitor taking laminar nickel aluminum and hydrotalcite nanomaterial as positive electrode

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Embodiment 1

[0028] (1) Disperse 250g of aluminum isopropoxide in 5L of water, stir at 70°C for 12h, then add dropwise HNO with a concentration of 3mol / L 3 Adjust the pH value of the solution to 3, continue to stir, cool the solution system to room temperature, and obtain the AlOOH sol after the water evaporates; grind 250g of the dried AlOOH sol, add 5L of water to stir for 12h, and then reflux for 12h to obtain the AlOOH sol precursor body;

[0029] (2) Take 5L of the AlOOH sol precursor obtained in step (1), and drop Ni(NO 3 ) 2 Solution 0.5L, after stirring, add urea 50g, hydrothermal reaction at 100°C for 24h, filter the product after the reaction is completed, wash the product alternately with water and ethanol, dry the obtained product at 80°C for 12h, and obtain lamellar nickel-aluminum water Talc nanomaterials;

[0030] (3) the lamellar nickel-aluminum hydrotalcite nanomaterial obtained in step (2) is the positive electrode material, acetylene black is the conductive agent, and...

Embodiment 2

[0036] (1) Disperse 250g of aluminum isopropoxide in 5L of water, stir at 50°C for 24h, then add dropwise HNO with a concentration of 1mol / L 3 Adjust the pH value of the solution to 6, continue to stir, cool the solution system to room temperature, and obtain the AlOOH sol after the water evaporates; grind 250g of the dried AlOOH sol, add 10L of water to stir for 12h, and then reflux for 12h to obtain the AlOOH sol precursor body;

[0037] (2) Take 10L of the AlOOH sol precursor obtained in step (1), and drop Ni(NO 3 ) 2 Solution 1L, after stirring, add urea 70g, hydrothermal reaction at 200°C for 18h, filter the product after the reaction is complete, wash the product alternately with water and ethanol, dry the obtained product at 80°C for 12h, and obtain lamellar nickel-aluminum hydrotalcite nanomaterials;

[0038] (3) the lamellar nickel-aluminum hydrotalcite nanomaterial obtained in step (2) is the positive electrode material, acetylene black is the conductive agent, an...

Embodiment 3

[0043] (1) Disperse 250g of aluminum isopropoxide in 5L of water, stir at 90°C for 5h, then add dropwise HNO with a concentration of 5mol / L 3 Adjust the pH value of the solution to 4, continue to stir, cool the solution system to room temperature, and obtain the AlOOH sol after the water evaporates; grind 250g of the dried AlOOH sol, add 25L of water to stir for 12h, and then reflux for 12h to obtain the AlOOH sol precursor body;

[0044] (2) Take 25L of the AlOOH sol precursor obtained in step (1), and drop Ni(NO 3 ) 2 Solution 2.5L, after stirring, add 100g of urea, hydrothermal reaction at 150°C for 22h, filter the product after the reaction is completed, wash the product alternately with water and ethanol, dry the obtained product at 100°C for 8h, and obtain lamellar nickel-aluminum water Talc nanomaterials;

[0045] (3) the lamellar nickel-aluminum hydrotalcite nanomaterial obtained in step (2) is the positive electrode material, acetylene black is the conductive agent...

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Abstract

The invention discloses a preparation method of a supercapacitor taking a laminar nickel aluminum and hydrotalcite nanomaterial as a positive electrode. The preparation method comprises the following steps: (1) preparing an AlOOH sol precursor; (2) dropwise adding a Ni(NO3)2 solution in the AlOOH sol precursor, and carrying out hydrothermal reaction for 1-48 hours at the temperature of 50-250 DEG C to obtain the laminar nickel aluminum and hydrotalcite nanomaterial; (3) taking the laminar nickel aluminum and hydrotalcite nanomaterial as a positive electrode material to prepare the positive electrode; (4) carrying out electrode activating treatment on the positive electrode; and (5) assembling the positive electrode and a negative electrode to form the supercapacitor. The supercapacitor is prepared by taking the laminar nickel aluminum and hydrotalcite nanomaterial as the positive electrode material, the laminar nickel aluminum and hydrotalcite nanomaterial has quite large specific surface area, the electrochemical activity of the laminar nickel aluminum and hydrotalcite nanomaterial, and therefore, the power density and the energy density of the supercapacitor are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of energy storage devices, and relates to a method for preparing a supercapacitor with a sheet-shaped nickel-aluminum hydrotalcite nanomaterial as the positive electrode. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are devices that store energy at the electrode / electrolyte interface through directional arrangement of electrons or ions or highly reversible chemical adsorption / desorption or redox reactions. As a new type of energy storage element, supercapacitors have attracted widespread attention and a lot of research has been done. A supercapacitor is a new type of energy device between ordinary physical capacitors and secondary batteries. The energy stored by this new type of energy device is more than an order of magnitude larger than that of ordinary physical capacitors, while maintaining the advantages of fast energy release by physical capacitors, which can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/24H01G11/26H01G11/30B82Y30/00
CPCY02E60/13H01G11/84B82Y30/00H01G11/24H01G11/26H01G11/30H01G11/86
Inventor 陈泽祥张继君王艳李海闫欣雨
Owner 四川英能基科技有限公司
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