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Basic metal salt nano material as well as preparation method and application thereof

A technology of nanomaterials and metal salts, which is applied in the field of basic metal salt nanomaterials and its preparation, can solve the problems of low specific surface area, low charge-discharge cycle stability, and poor rate performance of basic metal salts, and achieve excellent electrochemical performance. performance, excellent cycle performance, uniform particle distribution effect

Active Publication Date: 2021-04-16
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] As an electrode material, hydroxide has two major disadvantages: poor electrical conductivity and low charge-discharge cycle stability
At present, the hydrothermal method or solvothermal method is mostly used for the synthesis of metal hydroxides, but this method has many influencing factors and requires harsh reaction environments such as high temperature, high pressure and strong alkali, and the basic metal salt synthesized by this method has a low specific surface area and low magnification. lack of poor performance

Method used

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  • Basic metal salt nano material as well as preparation method and application thereof
  • Basic metal salt nano material as well as preparation method and application thereof
  • Basic metal salt nano material as well as preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0061] (1) Mix choline chloride, cetyltrimethylammonium chloride and urea in a molar ratio of 1:0.1:2, then stir and dissolve at 80°C to obtain a deep eutectic solvent.

[0062] (2) Weigh 0.1mol NiCl 2 ·6H 2 O and 0.2mol CoCl 2 ·6H 2 O stirred completely dissolved in 10mL of deep eutectic solvent, then added 20ml of distilled water to obtain a mixed solution, then reacted at 100°C for 12h with constant temperature stirring, cooled to room temperature, and after solid-liquid separation, the obtained product was sequentially washed with distilled water and 99.5% Wash and centrifuge 3 times with ethanol at 8000rpm, and the final product is vacuum-dried at 60°C for 12 hours to obtain a specific surface area of ​​18.2597m 2 / g (through the pore structure characterization method, see "Wu Xiaozhong. Preparation of carbon-based nanostructured electrode materials and their electrochemical properties. Doctoral dissertation", the same below) for the cubic structure basic nickel-cobalt...

Embodiment 2

[0071] The preparation process is basically the same as that in Example 1, except that the mixed solution obtained in step (2) is stirred and reacted at a constant temperature of 100° C. for 24 hours. The specific surface area obtained is 18.3052m 2 / g of basic nickel cobalt salt Ni 0.4 co 1.6 (OH) 3 Cl nanomaterials.

Embodiment 3

[0073] The preparation process is basically the same as in Example 1, the only difference being: weigh 0.1mol NiCl in step (2) 2 ·6H 2 O and 0.2mol CoCl 2 ·6H 2 O was stirred and completely dissolved in 20 mL of deep eutectic solvent, and then 20 mL of distilled water was added to obtain a mixed solution. The specific surface area obtained is 18.2574m 2 / g of basic nickel cobalt salt Ni 0.4 co 1.6 (OH) 3 Cl nanomaterials.

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Abstract

The invention discloses a basic metal salt nano material as well as a preparation method and application thereof, and belongs to the field of supercapacitors. According to the method, a porous three-dimensional structure with high specific surface area is generated by using a one-step eutectic solvent precipitation method through reaction between an optimized eutectic solvent and a metal salt. The preparation method has the characteristics of no pollution, low cost, simple preparation and biodegradability. The synthesized electrode material has the characteristics of short ion transmission path in an electrolyte, high electrochemical capacity of a product and high rate capability, and is suitable for industrial production for supercapacitors.

Description

technical field [0001] The invention belongs to the field of supercapacitors, and in particular relates to an alkali metal salt nano-material and its preparation method and application. Background technique [0002] As an efficient energy conversion and storage device, supercapacitors have broad application prospects in peak power and backup power, so they have attracted much attention. In recent years, transition metal hydroxides such as Co(OH) 2 and Ni(OH) 2 With a layered structure and a large theoretical specific capacitance, it is the most frequently studied class of electrode materials in redox supercapacitors. [0003] As electrode materials, hydroxides have two major disadvantages: poor electrical conductivity and low charge-discharge cycle stability. These two disadvantages are the main obstacles for transition metal hydroxides to become the dominant electrode materials. [0004] Deep eutectic solvents are a class of simple low-temperature ionic liquids that can...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/86
CPCY02E60/13
Inventor 陈胜洲陈江东杨伟邹汉波马婷婷潘彩凤
Owner GUANGZHOU UNIVERSITY