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Carbon-coated CoAl-LDH@NF composite electrode material and preparation method thereof

A composite electrode and carbon-coated technology, which is applied in the field of materials science, can solve the problems of poor conductivity of double metal hydroxides, and achieve the effects of overcoming poor conductivity and cycle performance, rich raw material sources, and high specific capacitance

Inactive Publication Date: 2017-06-13
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the present invention can solve the shortcomings of the double metal hydroxide in the prior art, such as poor conductivity and the use of adhesives, etc., and at the same time does not cause harm to the environment, and has good cycle stability

Method used

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  • Carbon-coated CoAl-LDH@NF composite electrode material and preparation method thereof
  • Carbon-coated CoAl-LDH@NF composite electrode material and preparation method thereof
  • Carbon-coated CoAl-LDH@NF composite electrode material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] A carbon-coated CoAl-LDH@NF composite electrode material and a method for preparing the same, comprising the following steps:

[0034] (1) Pretreatment of nickel foam

[0035] a. Foam nickel is cut into the shape of 1cm * 3cm * 1cm, each 15min of ultrasonic cleaning with deionized water, acetone, ethanol, deionized water successively, then wash 2 times with deionized water (the mass percent concentration of described acetone 60~98%, ethanol is absolute ethanol);

[0036] b. Then vacuum dry at 60° C. for 12 hours.

[0037] (2) Preparation of CoAl-LDH@NF

[0038] a. First, add 2 mg cobalt nitrate, 2 mg aluminum nitrate, 10 mg urea, 0.33 mg ammonium fluoride and 30 ml deionized water into the beaker at room temperature according to the mass ratio, and stir magnetically for 5 minutes until the mixture is completely uniform;

[0039] b. Move it into a polytetrafluoroethylene-lined stainless steel autoclave; then place the foamed nickel obtained in step 1) pretreated obliq...

Embodiment 2

[0050] A carbon-coated CoAl-LDH@NF composite electrode material and a method for preparing the same, comprising the following steps:

[0051] (1) Pretreatment of nickel foam

[0052] a. Foam nickel is cut into the shape of 1cm * 3cm * 1cm, each 15min of ultrasonic cleaning with deionized water, acetone, ethanol, deionized water successively, then wash 2 times with deionized water (the mass percent concentration of described acetone 60~98%, ethanol is absolute ethanol);

[0053] b. Then vacuum dry at 60° C. for 12 hours.

[0054] (2) Preparation of CoAl-LDH@NF

[0055] a. First, add 10mg of cobalt nitrate, 5mg of aluminum nitrate, 20mg of urea, 1.25mg of ammonium fluoride and 40ml of deionized water into the beaker according to the mass ratio at room temperature, and stir magnetically for 10 minutes until the mixture is completely uniform;

[0056] b. Move it into a polytetrafluoroethylene-lined stainless steel autoclave; then place the foamed nickel obtained in step 1) pret...

Embodiment 3

[0067] A carbon-coated CoAl-LDH@NF composite electrode material and a method for preparing the same, comprising the following steps:

[0068] (1) Pretreatment of nickel foam

[0069] a. Foam nickel is cut into the shape of 1cm * 3cm * 1cm, each 15min of ultrasonic cleaning with deionized water, acetone, ethanol, deionized water successively, then wash 2 times with deionized water (the mass percent concentration of described acetone 60~98%, ethanol is absolute ethanol);

[0070] b. Then vacuum dry at 60° C. for 12 hours.

[0071] (2) Preparation of CoAl-LDH@NF

[0072] a. First, add 15mg of cobalt nitrate, 8mg of aluminum nitrate, 45mg of urea, 1.5mg of ammonium fluoride and 50ml of deionized water into the beaker according to the mass ratio at room temperature, and stir magnetically for 10 minutes until the mixture is completely uniform;

[0073] b. Move it into a polytetrafluoroethylene-lined stainless steel autoclave; then place the nickel foam obtained in step 1) pretrea...

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Abstract

The invention discloses a carbon-coated CoAl-LDH@NF composite electrode material and a preparation method thereof. The preparation method disclosed by the invention comprises the steps of firstly utilizing cobalt nitrate and aluminum nitrate as a cobalt source and an aluminum source and foamed nickel as a substrate and obtaining Co-Al LDH@NF after one-step hydrothermal; then utilizing glucose or cane sugar as a carbon source to coat the Co-Al LDH@NF and performing hydrothermal treatment to obtain Co-Al LDH@NF@C. According to the preparation method disclosed by the invention, a substep hydrothermal-drying method is utilized, a preparation technology and required equipment are simple, raw materials are rich in source, reaction temperature is lower, high-temperature carbonization is avoided, and large-scale production is easy to achieve. The Co-Al LDH@NF@C composition material obtained through the method disclosed by the invention has good thermal stability, high crystallization degree and large specific surface area, further has strong morphology controllability and is one of ideal energy materials.

Description

technical field [0001] The invention belongs to the technical field of materials science, and relates to a three-dimensional hierarchical structure composite electrode material, specifically a carbon-coated CoAl-LDH@NF composite electrode material and a preparation method thereof. Background technique [0002] Human survival and social development are inseparable from energy, and energy is one of the important foundations of current economic development. For a long time, humans have used fossil fuels represented by the three major energy sources of oil, coal, and natural gas, which has gradually intensified the greenhouse effect and environmental pollution. With the continuous development of society, human's demand for energy continues to increase, but traditional non-renewable energy such as oil, coal, etc., can no longer meet human needs. Therefore, the development of new renewable clean energy is imminent. At present, new energy sources that have been developed or are b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/26H01G11/30H01G11/86
CPCY02E60/13H01G11/32H01G11/26H01G11/30H01G11/86
Inventor 蔺华林陈达明王爱民常兴韩生韩治亚陈红艳刘平赵志成刘玥冉周嘉伟许广文陈海军韦焕明余焓卢德力蒋继波邱丰何忠义熊丽萍
Owner SHANGHAI INST OF TECH
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