Preparation method of carbon aerogel containing double metal sites and application of aluminum-air battery

A carbon aerogel, battery application technology, used in battery electrodes, fuel cell-type half-cells and primary battery-type half-cells, circuits, etc., can solve problems such as slow kinetics and low ionic conductivity

Inactive Publication Date: 2021-07-06
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, neutral media usually have low ionic conductivity and very low OH - concentration, the oxygen reduction reaction (ORR) kinetics of common air cathode catalysts in neutral salt solutions is slow

Method used

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  • Preparation method of carbon aerogel containing double metal sites and application of aluminum-air battery
  • Preparation method of carbon aerogel containing double metal sites and application of aluminum-air battery
  • Preparation method of carbon aerogel containing double metal sites and application of aluminum-air battery

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Embodiment 1

[0039] The embodiment of the present invention designs a method for preparing carbon aerogels containing bimetallic sites, and its specific technical scheme is as follows:

[0040]Synthesis of S100 gelatin hydrogel: 60 mg of gelatin with a freezing capacity of 250 bloom, 30 mg of silica nanoparticles with a particle size of 15 nm and 2.51 mL of deionized water were placed in a 20 mL small glass bottle, stirred at room temperature for 40-60 min, and then Stir in a water bath at 60°C for 10-20min, return to room temperature after it is completely dissolved, add 150μL of iron-phenanthroline complex at a concentration of 0.2mol / L, 100μL of copper-o-phenanthroline complex at a concentration of 0.2mol / L Nitrophenanthrene complex, 80 μL, zinc acetate solution with a concentration of 1mol / L were mixed evenly, and the obtained solution was frozen in a -4°C refrigerator for 20 minutes to form a hydrogel, which was named G / Fe(PM) 3 -Cu(PM) 3 ;

[0041] Preparation of S200 iron-copper d...

Embodiment 2

[0048] A method for preparing a bimetallic site carbon airgel catalyst provided in the embodiment of the present invention, the specific steps are as follows:

[0049] S100, the synthesis of biomass hydrogel: Weigh 60mg of 250bloom gelatin and 30mg of silica nanoparticles (15nm) in a small glass bottle, add 2.51mL of deionized water, stir at room temperature for 40min to make it completely absorbed, and then Heated in a water bath at 60°C for 10 minutes, and returned to room temperature after it was completely dissolved, then added 150 μL of 0.2M iron-phenanthroline complex, 100 μL of 0.2M copper-phenanthroline complex, and 80 μL of 1M The zinc acetate solution was mixed evenly, and the obtained solution was placed in a -4°C refrigerator for 20 minutes to form a hydrogel, which was named G / Fe(PM) 3 -Cu(PM) 3 .

[0050] Preparation of S200 iron-copper double-site carbon airgel: G / Fe(PM) synthesized in step S100 3 -Cu(PM) 3 After the hydrogel was freeze-dried overnight, the ...

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Abstract

The invention discloses a preparation method of carbon aerogel containing double metal sites and application of an aluminum-air battery. The aerogel takes gelatin as a monomer, silicon dioxide as a hard template and an iron / copper-phenanthroline complex as a hydrogel precursor synthesized from a nitrogen source and a metal source; the preparation method comprises the following steps: carrying out freeze drying, high-temperature pyrolysis and acid pickling to obtain iron and copper double-site-doped carbon aerogel, and meanwhile, due to the fact that the carbon aerogel has rich three-dimensional wrinkles, a porous structure and active double metal sites, the carbon aerogel shows excellent oxygen reduction (ORR) electrocatalytic activity under alkaline and neutral conditions. The performance of a neutral aluminum-air battery assembled by taking the carbon aerogel as a positive electrode is obviously superior to that of a commercial Pt / C electrocatalyst, so that the catalyst prepared by the invention has potential guiding significance for research, development and production of a non-corrosive flexible wearable metal-air battery.

Description

technical field [0001] The invention relates to the technical field of energy storage and conversion, in particular to a method for preparing a nitrogen-doped biomass carbon airgel-supported FeCu bimetallic site porous material and its application in an aluminum-air battery. Background technique [0002] The non-renewability of fossil energy and the increasing environmental pollution have promoted the development of sustainable energy technologies, such as metal-air batteries. Among them, the aluminum-air battery has a high theoretical energy density (2796Whkg -1 ), low cost, and environmentally friendly, and has the characteristics of abundant reserves, light weight, and low cost, it is considered to be a promising battery. Aluminum-air batteries use metal aluminum as the negative electrode and oxygen in the air as the positive electrode to generate electricity through oxidation-reduction reactions. The performance of the battery depends to a large extent on the catalyst o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M12/06
CPCH01M4/8825H01M4/9041H01M4/9083H01M12/06H01M2004/8689
Inventor 张翼陈阳何庭宋娅娅尹春阳
Owner CENT SOUTH UNIV
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