A modified carbon material and a nitrogen-enriched liquid flow battery electrode prepared therefrom

A technology of carbon materials and liquid flow batteries, applied in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of restricting large-scale application and single catalytic activity function, and achieve rich nitrogen-containing functional groups and oxygen-containing functional groups, The preparation method is simple and easy, and the effect of improving voltage efficiency and energy efficiency

Active Publication Date: 2021-08-03
HUNAN YINFENG NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its catalytic activity function is relatively single, only for V 3+ / V 2+ show good catalytic activity
And the reaction conditions of high temperature and high pressure limit its large-scale application in actual production

Method used

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  • A modified carbon material and a nitrogen-enriched liquid flow battery electrode prepared therefrom
  • A modified carbon material and a nitrogen-enriched liquid flow battery electrode prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Add 25mL formaldehyde solution (2.5mL 37wt% formaldehyde solution dispersed in 22.5mL water) into the homemade 250mL reactor, cut 3*4cm 2 The commercialized graphite felt material was immersed in the solution; 0.6g urea and 0.63g melamine were respectively dispersed in a small amount of deionized water and ultrasonicated for 10min to obtain a homogeneous liquid. Pour the urea solution and the melamine solution into the reactor respectively, and the volume of the solution in the reactor is between 60mL-80mL, and does not change with the concentration of the reactants. Under the condition of magnetic stirring, the reaction temperature is controlled at 70°C, and KOH solution is added dropwise to adjust its pH to 8.5. Under alkaline conditions, urea and melamine are polymerized with formaldehyde respectively to form methylol urea and methylol melamine. Control the reaction time for 60 minutes, and test the pH change of the solution. After the pH is stable, add HCl dropwise ...

Embodiment 2

[0047] Add 25mL formaldehyde aqueous solution (4.16mL 37wt% formaldehyde aqueous solution dispersed in 20.84mL water) to the self-made 250mL reactor, and cut 3*4cm 2 The commercialized graphite felt material was immersed in the solution; 1.0g urea and 1.05g melamine were respectively dispersed in a small amount of deionized water, and the homogeneous liquid was obtained by ultrasonication for 10min. Pour the urea solution and the melamine solution into the reactor respectively, and the volume of the solution in the reactor is between 60mL-80mL, and does not change with the concentration of the reactants. Under the condition of magnetic stirring, the reaction temperature is controlled at 70°C, and KOH solution is added dropwise to adjust its pH to 8.5. Under alkaline conditions, urea and melamine are polymerized with formaldehyde respectively to form methylol urea and methylol melamine. Control the reaction time for 60 minutes, and test the pH change of the solution. After the ...

Embodiment 3

[0051] Add 25mL formaldehyde solution (3.125mL 37wt% formaldehyde solution dispersed in 21.875mL water) into the homemade 250mL reactor, and cut 3*4cm 2 The commercialized graphite felt material was immersed in the solution; 0.75g urea and 0.7875g melamine were respectively dispersed in a small amount of deionized water and ultrasonicated for 10min to obtain a homogeneous liquid. Pour the urea solution and the melamine solution into the reactor respectively, and the volume of the solution in the reactor is between 60mL-80mL, and does not change with the concentration of the reactants. Under the condition of magnetic stirring, the reaction temperature is controlled at 70°C, and KOH solution is added dropwise to adjust its pH to 8.5. Under alkaline conditions, urea and melamine are polymerized with formaldehyde respectively to form methylol urea and methylol melamine. Control the reaction time for 60 minutes, and test the pH change of the solution. After the pH is stable, add HC...

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Abstract

The invention provides a modified carbon material and a preparation method thereof, and a nitrogen-enriched liquid flow battery electrode prepared from the material. The preparation method comprises: 1) a substance containing an amino group and a substance containing a hydroxyl group are placed on the surface of the carbon material Carrying out in-situ polymerization reaction, and 2) calcining to obtain the modified carbon material. The carbon material treated by this method is rich in nitrogen-containing functional groups and oxygen-containing functional groups on the surface, and its hydrophilic performance, electrochemical activity and specific surface area are greatly improved. Moreover, the loads of nitrogen and oxygen elements can be controlled by adjusting the amount of formaldehyde-urea-melamine. The electrode has a high specific surface area and a high functional group content (such as an oxygen-containing functional group), especially for the main redox couple of the vanadium ion, which shows good catalytic activity, and its higher catalytic activity greatly reduces the polarization of the electrode. .

Description

technical field [0001] The invention relates to the technical field of battery electrode materials, in particular to a modified carbon material and a nitrogen-enriched liquid flow battery electrode prepared therefrom. Background technique [0002] With the continuous improvement of the proportion of new energy (such as solar energy, wind energy, tidal energy, etc.) in my country's energy utilization and the country's emphasis on the development of new energy, its shortcomings of timeliness and regional limitations are constantly exposed. This intermittent form of energy supply urgently needs a large-scale energy storage battery with high energy efficiency to adjust the balance between supply and demand to achieve the optimal utilization of energy. Flow batteries have shown excellent application potential in large-scale energy storage due to their low cost, simple structure, flexible adjustment of power output and capacity, and environmental protection. At present, large-scal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/21H01M4/96H01M8/18
CPCH01M4/96H01M8/188Y02E60/50
Inventor 吴雄伟邓奇曾宪祥李少冲黄鹏高雨吴雪文向小绢周鹏晟
Owner HUNAN YINFENG NEW ENERGY
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