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A modified carbon material and a flow battery electrode modified by graphene-like nanosheets prepared therefrom

A technology of carbon materials and liquid flow batteries, which can be applied to battery electrodes, circuits, electrical components, etc., can solve problems such as poor structural stability and difficulties in industrial application, achieve reduced polarization, simple and easy preparation methods, and excellent product performance Effect

Active Publication Date: 2021-03-30
HUNAN YINFENG NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its structural stability is poor, and it also faces the problem of difficulty in industrial application.

Method used

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  • A modified carbon material and a flow battery electrode modified by graphene-like nanosheets prepared therefrom
  • A modified carbon material and a flow battery electrode modified by graphene-like nanosheets prepared therefrom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]Add 25mL of phytic acid aqueous solution (2ml of 60wt% phytic acid solution dispersed in 23mL of water) into a 200mL beaker, and sonicate for 10min to obtain a homogeneous liquid. Immerse a graphite felt of a certain size in the phytic acid solution, add 10ml of urea aqueous solution (0.1-1.0g urea dispersed in 10mL of water) under the condition of an ice-water bath, and mix the two reactants evenly by ultrasonic treatment. Control the temperature of the reaction system to room temperature (20-40° C.) and react for 3-5 hours to obtain a graphite felt uniformly deposited with phytic acid-urea polymer flakes, and dry it at 60° C. overnight.

[0042] Place the graphite felt prepared above with uniform deposition of phytic acid-urea polymer sheet polymer in a tube furnace, under the protection of an inert gas, and calcinate at 800°C for 1 hour to obtain a nitrogen-phosphorus co-doped graphite felt composite material, its SEM image is shown in figure 2 .b, from figure 2 ....

Embodiment 2

[0045] Add 25mL phytic acid aqueous solution (1mL 60wt% phytic acid solution dispersed in 24mL water) into a 200mL beaker; sonicate for 10min to obtain a homogeneous liquid. Immerse graphite felt of a certain size in the phytic acid solution, add 10ml of urea aqueous solution (0.1-0.5g of urea dispersed in 10mL of water) under the condition of ice-water bath, and mix the two reactants evenly by ultrasonic treatment. Control the temperature of the reaction system to room temperature (20-40° C.) and react for 3-5 hours to obtain graphite felt with evenly deposited phytic acid-urea polymer flakes, and dry it at 60° C. overnight.

[0046] Place the graphite felt prepared above with uniform deposition of phytic acid-urea polymer sheet polymer in a tube furnace, under the protection of an inert gas, and calcinate at 800°C for 1 hour to obtain a nitrogen-phosphorus co-doped graphite felt composite Material.

[0047] The above-mentioned graphite felt composite material was prepared i...

Embodiment 3

[0049] Add 25 mL of phytic acid aqueous solution (4 mL of 60 wt % phytic acid dispersed in 21 mL of water) into a 200 mL beaker; and sonicate for 10 min to obtain a homogeneous liquid. Immerse graphite felt of a certain size in the phytic acid solution, add 10ml of urea aqueous solution (1-2g of urea dispersed in 10mL of water) under the condition of ice-water bath, and mix the two reactants uniformly by ultrasonic treatment. Control the temperature of the reaction system to room temperature (20-40° C.) and react for 3-5 hours to obtain graphite felt with evenly deposited phytic acid-urea polymer flakes, and dry it at 60° C. overnight.

[0050] Place the graphite felt prepared above with uniform deposition of phytic acid-urea polymer sheet polymer in a tube furnace, under the protection of an inert gas, and calcinate at 800°C for 1 hour to obtain a nitrogen-phosphorus co-doped graphite felt composite electrode.

[0051] The above-mentioned graphite felt composite material was...

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Abstract

The invention provides a modified carbon material, a preparation method thereof, and a redox flow battery electrode modified by a graphene-like nanosheet prepared from the same. The preparation methodcomprises the steps of: 1) subjecting phytic acid and an amino group-containing substance to in-situ polymerization on the surface of the carbon material; and 2) calcining the product at a high temperature. The carbon material treated by the method has rich oxygen-containing functional groups on its surface, and has greatly improved hydrophilic property, electrochemical activity and specific surface area. Moreover, the loading amount of hetero elements such as nitrogen and phosphorus can be controlled by adjusting the amount and molar ratio of phytic acid and urea. The electrode has high specific surface area and a high functional group content (for example, the oxygen-containing functional group), and exhibits good catalytic activity for both the positive and negative electrode pairs ofan all-vanadium redox flow battery, and the high catalytic activity of the electrode 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 flow battery electrode modified by graphene-like nanosheets prepared therefrom. Background technique [0002] With the improvement of people's living standards and the expansion of the scale of industrialized industries, the demand for electricity has increased sharply. High-power power plants are constantly being built to meet the ever-increasing demand for electricity. However, both residential electricity consumption and industrial electricity consumption have the characteristics of intermittent and continuous changes. In contrast, the power generated by power plants is not adjustable. In order to achieve efficient allocation of energy and improve utilization efficiency, the development of large-scale energy storage equipment supporting it is of great significance. This kind of large-scale energy storage equipment that can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/88H01M4/9083Y02E60/50
Inventor 吴雄伟高雨黄鹏林远腾王治安王泓睿胡永清刘俊
Owner HUNAN YINFENG NEW ENERGY
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