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All-vanadium redox flow battery electrode and preparation method thereof, and all-vanadium redox flow battery

An all-vanadium redox flow battery and electrode technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high cost and time consumption, complicated and cumbersome preparation process, etc., and achieve reduced capacity decay rate, reduced penetration, and improved The effect of durability

Active Publication Date: 2012-05-23
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The disadvantage of the technology mentioned in the above patent is that the added layer of polymer membrane cannot achieve the effect of blocking the penetration of vanadium ions because the pore size of the polymer membrane is not easy to control, and the preparation process of this method is complicated and cumbersome, and it is a multi-step process. The processing process, cost and time consumption are relatively large, not suitable for large-scale industrialization

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  • All-vanadium redox flow battery electrode and preparation method thereof, and all-vanadium redox flow battery
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preparation example Construction

[0040] Therefore, the second aspect of the present invention is to provide a method for preparing the electrode of the all-vanadium redox flow battery. The preparation method includes the following steps: the first step is to apply a suitable high molecular polymer paste slurry on one side of the base electrode material such as graphite felt, and then heat the high molecular polymer to melt to form a film; In the second step, at a temperature suitable for carbonizing the high molecular polymer, carbonize the obtained base electrode material coated with the high molecular polymer film to form a microporous carbon film; in the third step, activate the first carbon film with an acid The base electrode material with a microporous carbon film on one side obtained in the second step; the fourth step, bonding the activated base electrode material and the ion exchange membrane together to form the all-vanadium redox flow battery electrode of the present invention .

[0041] The high ...

Embodiment 1

[0055] (1) Firstly, phenolic resin (produced by Wuhan Tegus Technology Development Co., Ltd.) was dissolved in ethanol, and a paste slurry with a concentration of 40% by mass was prepared. Then spin coating on one side of graphite felt (produced by Hunan Jiuhua Carbon Hi-Tech Co., Ltd.) with a thickness of 5 mm to form a layer of polymer film with a film thickness of 2 μm, and then place the graphite felt at a temperature of 150 ° C in air Heating for 2 hours allowed it to melt, resulting in a dense polymer film.

[0056] (2) Carbonize the graphite felt obtained above at 700° C. for 2 hours in an inert gas to obtain a microporous carbon film with a pore diameter of 4.2 angstroms.

[0057] (3) Immerse the carbonized graphite felt in concentrated sulfuric acid with a concentration of 98% by mass, activate it at 60° C. for 5 hours, then wash it with pure water until neutral, and finally dry it in air at 60° C.

[0058] (4) On the side that graphite felt is attached to film, spra...

Embodiment 2

[0063] (1) Firstly, phenolic resin (manufactured by Wuhan Tegus Science and Technology Development Co., Ltd.) was dissolved in ethanol to form a paste slurry with a concentration of 30% by mass. Then spin-coat on one side of graphite felt (produced by Hunan Jiuhua Carbon Hi-Tech Co., Ltd.) with a thickness of 5 mm to form a layer of polymer film with a film thickness of 5 μm, and then heat the graphite felt in air at 100 ° C for 0.5 Hours, it is melted to obtain a dense polymer film.

[0064] (2) Carbonize the graphite felt obtained above at 1000° C. in an inert gas for 0.5 hour to obtain a microporous carbon film with a pore diameter of 5 angstroms.

[0065] (3) Immerse the carbonized graphite felt in concentrated sulfuric acid with a concentration of 98% by mass, activate it at 30° C. for 8 hours, then wash it with pure water until neutral, and finally dry it in air at 60° C.

[0066] (4) On the side of the graphite felt with the microporous carbon membrane, spray 15% by ma...

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Abstract

The invention discloses an all-vanadium redox flow battery electrode and a preparation method thereof, and an all-vanadium redox flow battery. The all-vanadium redox flow battery electrode comprises a substrate electrode material and an ion exchange membrane, wherein a side of the substrate electrode material is attached with a microporous carbon film, the ion exchange membrane is arranged on the microporous carbon film, only hydrogen ions can pass through the microporous carbon film, and vanadium ions can not pass through the microporous carbon film, such that the osmosis of the vanadium ions by the ion exchange membrane can be avoided or substantially reduced so as to substantially improve the durability and the corresponding charge and discharge efficiency of the vanadium battery, such that the capacity fading rate of the battery assembled by the all-vanadium redox flow battery electrode of the present invention is sufficiently reduced.

Description

technical field [0001] The invention relates to an electrode and a preparation method thereof, and a battery containing the electrode, in particular to an all-vanadium redox flow battery electrode and a preparation method thereof, and a battery containing the all-vanadium redox flow battery electrode. Background technique [0002] At present, due to the energy shortage and the deterioration of the environment, countries are gradually paying attention to the utilization and development of green energy. Vanadium battery is one of the green storage batteries with strong development momentum at present. It is a secondary energy system that uses redox reactions between vanadium ions in different valence states for energy storage and conversion. Its characteristics are: no emission pollution, adjustable capacity , Long cycle life, deep high current density discharge, fast charging, high energy conversion rate. As an energy storage power source, vanadium batteries are mainly used ...

Claims

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Application Information

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IPC IPC(8): H01M4/96H01M4/88H01M4/94
CPCY02E60/50
Inventor 马春印王文韬张祺王文红汪国庆
Owner ENN SCI & TECH DEV
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