Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing porous carbon radical electrode of sodium polysulfate / bromine energy storage cell

An energy storage battery, sodium polysulfate technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of electrode performance and stability, slow electrochemical reaction rate, high resistance of granular activated carbon, etc., to achieve high electrode performance , multi-electrochemical reaction interface, porosity controllable effect

Inactive Publication Date: 2005-03-16
DALIAN RONGKE POWER
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrodes made of granular activated carbon and polymer binder materials have poor electrical conductivity due to the high electrical resistance of granular activated carbon made from lignocellulose
Document 10 US P 5776633 prepares electrodes by carbonizing activated carbon fibers, activated carbon powder and resin, which can obtain relatively low resistivity (0.1-0.2Ωcm), but the preparation process is complicated, and no electrode prepared by this method is used. Sodium polysulfide / bromine energy storage battery system
[0017] In the above sodium polysulfide / bromine energy storage battery system, because the carbon-based electrode is in the Br - / Br 2 , S 2- x / S 2- x+1 In the redox process, the chemical and electrochemical properties are stable, and it is very beneficial to use carbon-based electrodes for both positive and negative electrodes. - / Br 2 , S 2- x / S 2- x+1 Oxidation-reduction reactions have certain activity, but the electrochemical reaction rate is slow, so the specific surface area of ​​the electrode must be increased to facilitate the improvement of the electrode reaction rate
In addition, during the discharge process of sodium polysulfide / bromine battery, the negative electrode may produce elemental sulfur, which limits the mass transfer process in the negative electrode. The pore structure used for mass transfer in the electrode has a great influence on the performance and stability of the electrode.

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
  • Method for preparing porous carbon radical electrode of sodium polysulfate / bromine energy storage cell
  • Method for preparing porous carbon radical electrode of sodium polysulfate / bromine energy storage cell
  • Method for preparing porous carbon radical electrode of sodium polysulfate / bromine energy storage cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0048] Mix XC-72 carbon (U.S. Cabot Corp., the same below), activated carbon particles (Shanxi Xinhua Chemical Factory, the same below) and polyvinylidene fluoride (Shanghai Sanaifu New Material Co., Ltd., the same below) powder in a certain weight ratio , activated carbon particle diameter 0.20-0.45mm, specific surface area 830m 2 / g, weight ratio XC-72 carbon: activated carbon particles: polyvinylidene fluoride=15: 70: 15, the mixed powder is placed in the mould, hot-pressed forming, hot-pressing temperature 200 ℃, the pressure of hot-pressing is controlled at 2Mpa The hot pressing time is 30min. After the electrode was naturally cooled, the electrode was impregnated with 20% ethanol aqueous solution, then impregnated with 1.0mol / l NaOH aqueous solution at a temperature of 80°C, and finally washed with 80°C deionized water until the pore-forming agent was removed.

[0049] The prepared electrode area is 5cm 2 , electrode thickness and bulk resistance are shown in Table 1. ...

Embodiment 1b

[0054] Weight ratio XC-72 carbon: activated carbon particles: polyvinylidene fluoride = 15:70:15, and then add a certain amount of sodium chloride pore-forming agent, weight ratio sodium chloride: XC-72 carbon + activated carbon particles + polyvinylidene fluoride The ratio of vinylidene fluoride is 20:80, and the diameter of activated carbon particles is 0.20-0.45mm. Prepare electrodes and assemble batteries according to the electrode preparation method of Example 1a, and the operating conditions are the same as in Example 1a. figure 2 , the polarization curves of the battery during charging and discharging are shown in image 3 , the thickness and volume resistance of the electrodes are shown in Table 1.

Embodiment 1c

[0056] Weight ratio XC-72 carbon: activated carbon particles: polyvinylidene fluoride = 15:70:15, and then add a certain amount of sodium chloride pore-forming agent, weight ratio sodium chloride: XC-72 carbon + activated carbon particles + polyvinylidene fluoride The ratio of vinylidene fluoride is 30:70, and the diameter of activated carbon particles is 0.20-0.45mm. Prepare electrodes and assemble batteries according to the electrode preparation method of Example 1a, and the operating conditions are the same as in Example 1a. figure 2 , the polarization curves of the battery during charging and discharging are shown in image 3 , the thickness and volume resistance of the electrodes are shown in Table 1.

[0057] Example

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
Thicknessaaaaaaaaaa
Specific surface areaaaaaaaaaaa
Diameteraaaaaaaaaa
Login to View More

Abstract

isclosed is a manufacturing method of multi-hole carbon electrode for sodium polysulfide / bromine storage battery, electrode is manufactured by the hot press method of conductor carbon material, active carbon particle, polymer agglomerant and pore forming material. The invention has simple manipulation, low cost, suitable for production in large quantity, its carbon electrode has easily controllable in symmetric structure, fairly high mechanical strength, good electrical conductivity, and excellent activity, chemical and electrochemical stability showed in sodium polysulfide / bromine storage battery. The invention has fairly high value of practical use, can reduce use cost of sodium polysulfide / bromine storage battery and advance its commercialized use .

Description

technical field [0001] The invention relates to chemical power source energy storage technology, in particular to a method for manufacturing a porous carbon-based electrode of a sodium polysulfide / bromine energy storage battery. Background technique [0002] The storage of electric energy is of great significance in power system peak regulation, prevention of power supply disasters, and military applications. Therefore, it is very necessary to develop a low-cost, environmentally friendly and commercialized high-power and high-efficiency energy storage technology, which can store surplus electric energy during low power consumption and convert the stored energy into electric energy during peak power consumption. Chemical power energy storage technology has a good application prospect because it is not limited by geographical location and time. [0003] Sodium polysulfide / bromine (Na 2 S 2 / NaBr 3 ) Energy storage battery is a new type of high-efficiency electric energy st...

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): H01M4/88H01M4/94
CPCY02E60/50
Inventor 葛善海周汉涛衣宝廉张华民
Owner DALIAN RONGKE POWER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com