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Preparation method of NixV-LDH/C composite material

A carbon composite material and hydrotalcite technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of poor stability and low specific capacity, and achieve the advantages of simple process, improved specific capacity and cycle stability. Effect

Inactive Publication Date: 2016-04-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of nickel-vanadium hydrotalcite / carbon composite material, which solves the problems of low specific capacity and poor stability of pure nickel hydroxide material

Method used

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  • Preparation method of NixV-LDH/C composite material
  • Preparation method of NixV-LDH/C composite material
  • Preparation method of NixV-LDH/C composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0022] (1) In an ice-water bath, add 0.2 g of acetylene black (AB) into a beaker containing 15 mL of concentrated sulfuric acid, and slowly add 2 g of potassium permanganate into the above mixture under stirring conditions. After the addition, the mixture was transferred to a 150mL round-bottomed flask, heated to 40°C, stirred in a water bath for 1 hour, cooled to room temperature, poured into deionized water for dilution, and then centrifuged at 8500 rpm to remove the solution. Use 500mL of deionized water and ethanol to wash the lower black precipitate obtained by centrifugation until the pH of the filtrate is 6.5-7, and dry it at 60°C for 10 hours to obtain oxyacetylene black (ABO-1) with a low degree of oxidation.

[0023] (2) 2.5mmol of NiCl 2 ·6H 2 O, 1.25 mmol VCl 3 Dissolve in 40mL of deoxygenated deionized water, then add 0.3g of acetylene black oxide to the above mixed salt solution, ultrasonicate for 40-60min under a nitrogen protective atmosphere, and then transf...

Embodiment 2

[0025](1) In an ice-water bath, add 0.2 g of acetylene black (AB) into a beaker containing 15 mL of concentrated sulfuric acid, and slowly add 2 g of potassium permanganate into the above mixture under stirring conditions. After the addition, the mixture was transferred to a 150mL round-bottomed flask, heated to 40°C, stirred in a water bath for 3 hours, cooled to room temperature, poured into deionized water for dilution, and then centrifuged at 8500 rpm to remove the solution. Use 500mL of deionized water and ethanol to wash the lower black precipitate obtained by centrifugation until the pH of the filtrate is 6.5-7, and dry it at 60°C for 10 hours to obtain acetylene black oxide (ABO-2) with a higher degree of oxidation.

[0026] (2) 2.5mmol of NiCl 2 ·6H 2 O, 1.25 mmol VCl 3 Dissolve in 40mL of deoxygenated deionized water, then add 0.3g of acetylene black oxide to the above mixed salt solution, ultrasonicate for 40-60min under a nitrogen atmosphere, and then transfer to...

Embodiment 3

[0028] (1) In an ice-water bath, add 0.2 g of acetylene black (AB) into a beaker containing 15 mL of concentrated sulfuric acid, and slowly add 2 g of potassium permanganate into the above mixture under stirring conditions. After the addition is complete, transfer the mixed solution to a 150mL round-bottomed flask, raise the temperature to 90°C, stir in a water bath for 1h, cool to room temperature, pour into deionized water for dilution, and then centrifuge at 8500 rpm to remove the solution, and then sequentially Use 500ml of deionized water and ethanol to wash the lower layer of black precipitate obtained by centrifugation until the pH value of the filtrate is 6.5-7, and dry it with air at 60°C for 10 hours to obtain oxyacetylene black (ABO) with a higher degree of oxidation under different temperature conditions. -3).

[0029] (2) 2.5mmol of NiCl 2 ·6H 2 O, 1.25 mmol VCl 3 Dissolve in 40mL of deoxygenated deionized water, then add 0.3g of acetylene black oxide to the ab...

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Abstract

A preparation method of a NixV-LDH / C composite material belongs to the technical field of an electrode material of an electrochemical supercapacitor. The composite material is in a state of accumulated nanosheets, and the effect of coordination between double-electric-layer energy storage and pseudo-capacitance energy storage is achieved. The surface of acetylene black is oxidized, the acetylene black is taken as a substrate, and then anchoring and synthesis of NixV-LDH are conducted on the surface of the acetylene black through coprecipitation. In this way, the NixV-LDH / C composite material is obtained. The advantages of the method are that the preparation process is simple, and the cost is low; and controllable preparation of a series of NixV-LDH / C composite electrode materials is realized by micro-regulation and control of preparation conditions, then macro-regulation and control of the electrochemical performance of the materials is achieved, and the electrode materials with high specific volume and stable electrochemical performance are screened.

Description

technical field [0001] The invention belongs to the technical field of electrode materials for electrochemical supercapacitors, and in particular relates to a preparation method of a nickel vanadium hydrotalcite / carbon composite material. Nickel vanadium hydrotalcite / carbon is (Ni x V-LDH / C). Suitable for application on supercapacitor electrodes. Background technique [0002] With the development of society and economy, people pay more and more attention to green energy and ecological environment. As a new type of energy storage device, supercapacitor has been paid more and more attention. Most of the current research on electrochemical capacitors revolves around the development of electroactive materials with high specific capacity. Supercapacitor electrode materials are mainly divided into three categories, namely carbon materials, metal oxides or hydroxides, and conductive polymers. Carbon materials mainly store energy by adsorbing ions in the electrolyte to form an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/24
CPCY02E60/13H01G11/86H01G11/24H01G11/30
Inventor 路艳罗褚小彦杨文胜陈旭
Owner BEIJING UNIV OF CHEM TECH
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