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Preparation method of nitrogen and phosphorus doubly-doping porous carbon nanofiber material for air electrode

An air electrode, nanofiber technology, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., can solve problems such as limited application and high price

Inactive Publication Date: 2016-06-29
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of carbon paper, carbon cloth, carbon nanofibers and carbon nanotubes as electrode materials, and noble metals as catalysts can improve the performance of air electrodes, but their high prices limit their applications.

Method used

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  • Preparation method of nitrogen and phosphorus doubly-doping porous carbon nanofiber material for air electrode
  • Preparation method of nitrogen and phosphorus doubly-doping porous carbon nanofiber material for air electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 2.8ml of aniline solution was added to 50ml of 7.7% phytic acid aqueous solution, heated and stirred at 90°C for 10min to generate aniline-phytic acid salt solution, and then cooled to 4°C. 1.716 g of ammonium persulfate was weighed and dissolved in 6 ml of deionized water and cooled to 6°C. The two solutions were quickly mixed, the mixed solution was placed in an ice-water bath for 2 hours, the synthesized hydrogel was soaked for 36 hours, and then lyophilized for 72 hours to form aerogels. The aerogel was carbonized at 1000 °C under the protection of Ar gas for 3 h to obtain the porous carbon nanofiber material.

Embodiment 2

[0026] 2.8ml of aniline solution was added to 50ml of 7.7% phytic acid aqueous solution, heated and stirred at 90°C for 10min to generate aniline-phytic acid salt solution, and then cooled to 8°C. 1.716 g of ammonium persulfate was weighed and dissolved in 6 ml of deionized water and cooled to 8°C. The two solutions were quickly mixed, and the mixed solution was placed in an ice-water bath for 8 h, the synthesized hydrogel was soaked for 24 h, and then lyophilized for 72 h to form aerogel. The aerogel was carbonized for 1 h at 1100 °C under the protection of Ar gas, and the porous carbon nanofiber material was obtained.

Embodiment 3

[0028] 2.8ml of aniline solution was added to 50ml of 7.7% phytic acid aqueous solution, heated and stirred at 90°C for 10min to generate aniline-phytic acid salt solution, and then cooled to 2°C. 1.716 g of ammonium persulfate was weighed and dissolved in 6 ml of deionized water and cooled to 4°C. The two solutions were quickly mixed, the mixed solution was placed in an ice-water bath for 10 hours, the synthesized hydrogel was soaked for 18 hours, and then lyophilized for 72 hours to form aerogels. The aerogel was carbonized at 800°C under the protection of Ar gas for 2 h to obtain the porous carbon nanofiber material.

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Abstract

The invention discloses a preparation method of a nitrogen and phosphorus doubly-doping porous carbon nanofiber material for an air electrode. The preparation method comprises the following steps of adding 2.8ml aniline solution to 50ml phytic acid solution with certain mass content; heating and stirring the mixed solution to generate an aniline-phytic acid salt solution; cooling the aniline-phytic acid salt solution to a certain temperature; weighing and dissolving 1.716g ammonium persulfate in 6ml deionized water; cooling the mixed solution to a certain temperature; rapidly mixing the two solutions; allowing the mixed solution to stand in ice-water bath for a certain time; immersing synthesized hydrogel; carrying out freeze-drying on the hydrogel for 72 hours to generate aerogel; and carbonizing the aerogel at a certain temperature and under the protection of Ar, thereby obtaining the porous carbon nanofiber material.

Description

technical field [0001] The invention belongs to the field of energy storage batteries, and in particular relates to a carbon fiber material for an air electrode in a secondary battery. The carbon material is doped with nitrogen and phosphorus, has a porous structure, is applied to a positive electrode of a secondary air battery, and has high energy density and high energy density. power density. Background technique [0002] At present, the global energy supply is becoming increasingly scarce, and people are exploring new energy sources. As a new technology of high efficiency, cleanness and utilization of energy, fuel cell has become a development hotspot in the field of energy in the world today. Secondary air battery is a special type of fuel cell and one of the representatives of a new generation of green secondary batteries. It has the advantages of low cost, non-toxicity, non-polluting, high specific power and high specific energy. It can be recycled and has a simple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M12/08B82Y30/00B82Y40/00
CPCH01M4/8652H01M12/08B82Y30/00B82Y40/00Y02E60/10
Inventor 朱永明胡会利许春阳滕祥国
Owner HARBIN INST OF TECH AT WEIHAI
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