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Preparation method of an electrochemically assisted nitrogen-phosphorus double-doped carbon-based air electrode

An air electrode, double doping technology, applied in battery electrodes, fuel cell type half cells and secondary cell type half cells, fuel cell type half cells and primary cell type half cells, etc. The preparation method of the metal diatomic doping integrated electrode is cumbersome and the catalytic performance is not excellent enough to achieve the effect of excellent electrocatalytic performance, simple and controllable preparation method, and good electrical conductivity.

Active Publication Date: 2021-04-02
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

In some reports and patents, the preparation methods of non-metallic double-atom doped integrated electrodes are cumbersome, and the catalytic performance is not excellent enough.

Method used

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  • Preparation method of an electrochemically assisted nitrogen-phosphorus double-doped carbon-based air electrode
  • Preparation method of an electrochemically assisted nitrogen-phosphorus double-doped carbon-based air electrode
  • Preparation method of an electrochemically assisted nitrogen-phosphorus double-doped carbon-based air electrode

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Embodiment 1

[0027] Pretreatment of conductive carbon substrates:

[0028] (1) Cut the carbon cloth into a size of 1cm*1.2cm, put it in acetone for ultrasonic cleaning for 10 minutes, and then put it in deionized water for ultrasonic cleaning for 10 minutes.

[0029] (2) Soak the cleaned carbon cloth in a mixture of 40mL sulfuric acid and 20mL nitric acid for 30min, and keep stirring; then add 6g of potassium permanganate, stir for 1h; then gradually add 100mL of deionized water, and stirred for 2h; finally added hydrogen peroxide until the solution became clear, after rinsing with deionized water.

[0030] (3) Put the obtained carbon cloth into a vacuum drying oven and bake at 80 degrees Celsius for 24 hours.

[0031] Preparation of electrochemically assisted nitrogen and phosphorus double-doped carbon-based air electrodes:

[0032] (1) Measure 120 mL of acetonitrile, weigh 3 g of tetrabutylammonium hexafluorophosphate, and prepare a solution of 1.20762 g of pyrrole, pour it into the el...

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Abstract

The invention relates to a method for preparing an electrochemically assisted nitrogen and phosphorus double-doped carbon-based air electrode, belonging to the technical field of air electrodes. Pyrrole or the like is used as an electropolymerization nitrogen source, tetrabutylammonium hexafluorophosphate or the like is used as a phosphorus source and a supporting electrolyte, and the polymerization is carried out on a pretreated conductive carbon substrate through an electrochemical method. Finally, the nitrogen and phosphorus double-doped carbon-based air electrode is obtained through a subsequent calcination process. Nitrogen (one of sources) is uniformly distributed in a polymer form while phosphorus is impregnated in situ. The integrated electrode has a high specific surface area andgood catalytic performance and stability and can be used as a cathode catalyst applied in a metal air battery and has a wide range of practical applications.

Description

technical field [0001] The invention belongs to the technical field of air electrodes, and in particular relates to a nitrogen-phosphorus double-doped carbon-based air electrode, and also relates to a method for preparing the above-mentioned material. Background technique [0002] The doping of heteroatoms in carbon materials can increase the redox catalytic activity of the material, and has strong oxidation resistance and good stability, so it has been studied and sought after by a large number of scientific researchers. People first studied single-atom doping, including metal single-atom doping and non-metal single-atom doping. Compared with metal atom doping, non-metal atom doping has a lower cost, so the research value is higher. Now nitrogen-doped carbon materials have become the most studied non-metal single-doped materials; in addition, single-atom doping such as boron, sulfur, phosphorus, and fluorine has gradually begun to be studied. Subsequently, diatom-doped car...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/96H01M12/06H01M12/08
CPCH01M4/8878H01M4/8892H01M4/96H01M12/06H01M12/08Y02E60/10
Inventor 程元徽周圣杰向中华张宁远姜鹏
Owner BEIJING UNIV OF CHEM TECH
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