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
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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 e

Method used

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  • 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
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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

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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

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Application Information

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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
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