Unlock instant, AI-driven research and patent intelligence for your innovation.

An electrode material for an all-vanadium redox flow battery constructed of boron-doped aerogel, its preparation method and application

An electrode material and flow battery technology, which is used in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problems of inapplicability to all-vanadium flow batteries, limited electrode performance, and cumbersome preparation process, so as to improve electrocatalysis. The effect of reversibility of activity and reaction kinetics, low cost of raw materials, and simple process

Active Publication Date: 2021-09-07
HUNAN AGRICULTURAL UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of improving electrode performance is still limited, or the entire preparation process is cumbersome and the cost is too high, and most importantly, it is not suitable for all-vanadium redox flow batteries

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An electrode material for an all-vanadium redox flow battery constructed of boron-doped aerogel, its preparation method and application
  • An electrode material for an all-vanadium redox flow battery constructed of boron-doped aerogel, its preparation method and application
  • An electrode material for an all-vanadium redox flow battery constructed of boron-doped aerogel, its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] The preparation method of the present invention will be further described in detail in conjunction with specific examples below. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0044] The experimental methods used in the following examples are conventional methods unless otherwise specified; the reagents and materials used in the following examples can be obtained from commercial sources unless otherwise specified.

Embodiment 1

[0046] Dissolve 1g of polyvinyl alcohol in 100ml of deionized water, heat to 95°C for about 2 hours to disperse evenly, soak 3g of graphite felt electrode in the polyvinyl alcohol solution, and disperse evenly by ultrasonic to obtain a mixed system. Dissolve 3g of potassium borate in 10ml of deionized water, and ultrasonically dissolve it fully. During the vigorous stirring process, the potassium borate solution was slowly added dropwise to the above mixing system to cause gelation in the carbon-based material. After 12 hours of reaction time, the carbon-based material was taken out and frozen with liquid nitrogen. After 24 hours Freeze dry under vacuum. The carbon-based material after vacuum freeze-drying was placed in a tube furnace, and calcined in an argon atmosphere at 800°C for 2 hours, the heating rate was 5°C / min, cooled to room temperature, and the carbon-based material was taken out with dilute hydrochloric acid and deionized water Washed three times respectively, pla...

Embodiment 2

[0053] Dissolve 2g of polyethylene oxide in 100ml of dedimethylformamide, heat to 60°C for about 2 hours to disperse evenly, soak 3g of graphite felt electrode in the polyethylene oxide solution, and disperse uniformly by ultrasonic to obtain a mixed system. Dissolve 5g of boric acid in 10ml of deionized water, and ultrasonically dissolve it fully. During the vigorous stirring process, the boric acid solution was slowly added dropwise to the above mixing system to cause the gelation process to occur in the carbon-based material. After 12 hours of reaction time, the carbon-based material was taken out and frozen with liquid nitrogen. After 24 hours of vacuum Freeze dried. The carbon-based material after vacuum freeze-drying was placed in a tube furnace, and calcined in an argon atmosphere at 900°C for 2 hours, the heating rate was 2°C / min, cooled to room temperature, and the carbon-based material was taken out with dilute hydrochloric acid and deionized water. Washed three tim...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
voltage efficiencyaaaaaaaaaa
voltage efficiencyaaaaaaaaaa
voltage efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention provides an electrode material for an all-vanadium redox flow battery constructed of boron-doped aerogel and its preparation method and application; The boron-doped airgel network is formed in situ in carbon-based materials, which greatly improves the interface reaction area and catalytic active sites of the electrode, improves the transport of ions and the transfer of charges, and then improves the electrochemical activity of the electrode. Reduces electrochemical polarization and promotes voltage and energy efficiency of the battery. The electrode material prepared by the invention utilizes the porous structure and high specific surface of the airgel, increases the contact area between the electrode and the electrolyte, facilitates the transportation and diffusion of the electrolyte in the electrode, and simultaneously promotes the transfer of charges. Since boron doping helps to introduce more reactive sites on carbon-based materials, the electrocatalytic activity and reversibility of reaction kinetics are improved.

Description

technical field [0001] The invention relates to the field of preparation and application of an electrode material for an energy storage liquid flow battery, in particular to an electrode material for an all-vanadium redox flow battery constructed of boron-doped aerogel, a preparation method and application thereof. Background technique [0002] Based on the current shortage of chemical energy and a series of environmental pollution problems caused by it, the development of renewable and clean energy has become an inevitable choice. However, renewable clean energy such as solar and wind energy is intermittent and unstable due to factors such as geography and climate, and large-scale energy storage systems are required to provide stable energy output. Due to its flexible system design, relatively independent output power and capacity, long service life, high current charging and discharging, and stable overall performance, flow batteries have become one of the most promising l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/96H01M8/18
CPCH01M4/96H01M8/188Y02E60/50
Inventor 吴雄伟凌苇董新荣邓奇周鹏晟王泓睿马强许雨婷陈慧
Owner HUNAN AGRICULTURAL UNIV