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

Composite electrode for all-vanadium redox flow battery and preparation method of composite electrode

A composite electrode, flow battery technology, used in battery electrodes, fuel cells, regenerative fuel cells, etc., can solve the problem of low battery conductivity, improve mechanical stability, reduce electrochemical polarization, and achieve excellent electrochemical performance. Effect

Inactive Publication Date: 2020-12-08
SHENZHEN UNIV
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a composite electrode based on all-vanadium redox flow battery and its preparation method, aiming at solving the problem of using CeO 2 Treatment of graphite felt as a catalyst, leading to the problem of lower electrical conductivity of the entire battery

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
  • Composite electrode for all-vanadium redox flow battery and preparation method of composite electrode
  • Composite electrode for all-vanadium redox flow battery and preparation method of composite electrode
  • Composite electrode for all-vanadium redox flow battery and preparation method of composite electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The preparation steps of a high-density semi-embedded bismuth nanoparticle composite electrode of the present embodiment are as follows:

[0070] The first step: firstly, the original porous carbon felt is placed in a muffle furnace, and kept at a high temperature of 500° C. for 5 hours in an air atmosphere to obtain a heat-treated porous carbon felt. 200 mg of bismuth nitrate was dissolved in 20 mL of ethylene glycol solution to obtain a bismuth nitrate solution. Then set the size to 2×2cm 2 The heat-treated porous carbon felt was immersed in the bismuth nitrate solution obtained above, stirred in an ultrasonic bath for 1 hour, and then dried at 80 °C for 2 hours to obtain deposited Bi(NO 3 ) 3 Coated carbon felt.

[0071] The second step: the deposited Bi(NO 3 ) 3 The coated carbon felt was transferred to a tube furnace and calcined at 200 °C in an argon atmosphere at a heating rate of 10 °C / min for 1 h to make the Bi(NO 3 ) 3 Decompose completely to obtain the...

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
Diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a composite electrode for an all-vanadium redox flow battery and a preparation method of the composite electrode. The preparation method comprises the following steps: activating a porous carbon fiber electrode; depositing bismuth salt on the activated porous carbon fiber electrode; and performing thermal reduction reaction on bismuth oxide generated by thermal decomposition of bismuth salt and carbon on the surface of the electrode to obtain the composite electrode embedded with bismuth nanoparticles. The composite electrode is applied to the all-vanadium redox flow battery, the electrochemical polarization of the battery during charging and discharging operation is remarkably reduced, and the mechanical stability of the catalyst on the fiber surface is improved through a semi-embedded structure. The composite electrode prepared in the embodiment 1 is used as a negative electrode of the all-vanadium redox flow battery, a Nafion-212 membrane is used as a diaphragm, charging and discharging are carried out in a 1 mol / L vanadium electrolyte, and the energy efficiency of the battery can reach 80.6% and 77.5% respectively in the conditions of 400 mA / cm<2> and 480 mA / cm<2>.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a composite electrode based on an all-vanadium redox flow battery and a preparation method thereof. Background technique [0002] Due to the serious risks posed by climate change, renewable energy technologies are attracting a lot of attention, and in addition, the cost of renewable energy sources is becoming increasingly competitive with that of existing energy sources. However, environmentally sustainable energy sources such as wind and solar are subject to intermittency and fluctuations in power generation, making it a challenge to develop an energy storage system (EES) that can match power supply and demand at multiple times and scales. In the EES approach, a redox flow battery (RFB) is considered a suitable system due to its several attractive properties, including long cycle life, safety, thermal management, and uncoupled power output and energy capacity. , which allows ...

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
IPC IPC(8): H01M4/90H01M4/96H01M4/88H01M8/18B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H01M4/8842H01M4/886H01M4/9041H01M4/96H01M8/188Y02E60/50
Inventor 周学龙吴其兴张向阳莫兰兰
Owner SHENZHEN UNIV
PatSnap Eureka logo

PatSnap Eureka turns technology decisions into work you can execute. Powered by our Innovation Knowledge Graph, it runs expert workflows across engineering, life sciences, materials and intellectual property. Get your review-ready output in minutes.

X (Twitter)LinkedInYouTubeSubstack

© 2026 PatSnap. All rights reserved. 

Terms of Service

 | 

Privacy policy

 | 

Modern Slavery Act Transparency Statement