Modified electrode for full-vanadium flow battery and preparation method thereof

An all-vanadium redox flow battery, modified electrode technology, applied in battery electrodes, nanotechnology for materials and surface science, fuel cells, etc., can solve problems such as battery efficiency to be improved, poor conductivity, etc.

Inactive Publication Date: 2017-09-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor conductivity, the battery efficiency needs to be improved under the condition of high charge and discharge current density.

Method used

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  • Modified electrode for full-vanadium flow battery and preparation method thereof
  • Modified electrode for full-vanadium flow battery and preparation method thereof
  • Modified electrode for full-vanadium flow battery and preparation method thereof

Examples

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preparation example Construction

[0021] A method for preparing a modified electrode applied to an all-vanadium redox flow battery according to an embodiment of the present invention includes:

[0022] Weigh SnCl according to the ratio of the amount of substances weighed 91:9 4 ·5H 2 O and SbCl 3 ;

[0023] Then the above SnCl 4 ·5H 2 O and SbCl 3 The mixture was dissolved in isopropanol, and after melting, the SnO 2 with Sb 2 o 3 The mass concentration of the sum of the mass is 10-20g / L.

[0024] Then, after magnetic stirring at 80° C. for 0.5 h, a light yellow solution was obtained;

[0025] Obtain light yellow, clear and transparent flowable sol after aging for 24 hours;

[0026] Slowly immerse the treated carbon paper or carbon felt in the above sol with a pulling device for 5 minutes, then pull it up vertically and steadily at a uniform speed of 5 cm / min, and dry it in an oven at 100°C for 15 minutes; in order to prepare different For the modified electrode with loading capacity, repeat the abo...

Embodiment 1

[0043] Weigh 2.12g SnCl 4 ·5H 2 O and 0.14 g of SbCl 3 , and then the above 2.12g SnCl 4·5H 2 O and 0.14 g of SbCl 3 The mixture was dissolved in 100mL isopropanol, the mass concentration (as SnO 2 with Sb 2 o 3 ) was 10 g / L, and then magnetically stirred for 0.5 h at 80° C. to obtain a light yellow solution. After aging for 24 hours, a light yellow, clear, transparent and flowable sol was obtained. Use a pulling device (HTDC-300 dipping and pulling coating machine, stroke 5cm, pulling speed 5cm / min) to slowly enter the treated carbon paper into the sol for 5min, and then lift it vertically and steadily at a uniform speed of 5cm / min. Pull it up and dry it in an oven at 100°C for 15 minutes. Repeat the above steps. Pulling 5 times, the loading capacity of nanoparticles is 0.1mg / cm 2 . Finally, the dried carbon paper was placed in a tube furnace and calcined at 450 °C for 90 min. The loading capacity of the prepared nanoparticles was 0.1 mg / cm 2 The modified electr...

Embodiment 2

[0045] Weigh 3.18g SnCl 4 ·5H 2 O and 0.21 g of SbCl 3 . Then the 3.18g SnCl 4 ·5H 2 O and 0.21 g of SbCl 3 The mixture was dissolved in 100mL isopropanol, the mass concentration (as SnO 2 with Sb 2 o 3 ) was 10 g / L, and then magnetically stirred for 0.5 h at 80° C. to obtain a light yellow solution. After aging for 24 hours, a light yellow, clear, transparent and flowable sol was obtained. Use a pulling device (HTDC-300 dipping and pulling coating machine, stroke 5cm, pulling speed 5cm / min) to slowly enter the treated carbon paper into the sol for 5min, and then lift it vertically and steadily at a uniform speed of 5cm / min. Pull it up and dry it in an oven at 100°C for 15 minutes. Repeat the above steps. Pulling 8 times, the loading capacity of the prepared nanoparticles is 0.2mg / cm 2 . Finally, the dried carbon paper was placed in a tube furnace and calcined at 500 °C for 90 min. Electron micrographs of the obtained modified electrodes are shown in figure 1 sh...

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Abstract

The invention belongs to the technical field of electrode material surface treatment and especially relates to a modified electrode for a full-vanadium flow battery and a preparation method thereof. A carbon paper or a carbon felt is used as a modified electrode base material. An antimonic stannic oxide nanometer particle is attached to the surface of the carbon paper or the carbon felt fiber. The preparation method for the modified electrode is characterized by comprising the following steps: utilizing stannic chloride, antimony chloride and isopropyl alcohol to prepare a precursor solution; stirring for 30min at 80 DEG C and ageing for 24h; soaking the carbon paper or the carbon felt into the solution; adopting a pulling method for attaching the nanometer particle from the related solution to the surface of the carbon paper or the carbon felt fiber; drying at 80-150 DEG C; and finally, putting the dried carbon paper into a tube furnace, and calcining for 90min at 450-550 DEG C, thereby completing the preparation of the modified electrode. The invention provides the modified electrode which has a simple structure and is convenient in preparation method. After the modified electrode is applied to the full-vanadium flow battery, the problems of insufficient anode activity and oxygen evolution side reaction of the full-vanadium flow battery can be solved.

Description

technical field [0001] The invention relates to a modified electrode applied to an all-vanadium redox flow battery and a preparation method thereof. technical background [0002] The increasing demand for energy and the ensuing environmental pollution threaten the survival and development of human beings. Optimizing the energy structure and vigorously developing and utilizing renewable energy are of great significance to my country's energy strategy. However, the inherent volatility and immediacy of renewable energy such as solar energy, wind energy, and water energy have restricted their wide application. Therefore, it has become a top priority to develop efficient energy storage technology, promote the development of the renewable energy technology market, and ensure the security of national resources and energy. [0003] As a green and high-efficiency large-scale energy storage and conversion device, the flow battery has attracted the attention of academia, industry and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/88H01M8/18B82Y30/00
CPCB82Y30/00H01M4/8657H01M4/8828H01M4/9016H01M4/9083H01M8/188Y02E60/50
Inventor 张劲杨春美刘祎阳卢善富相艳吕阳
Owner BEIHANG UNIV
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