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Integrated electrode for vanadium cell and preparation method thereof

A vanadium battery and electrode technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of high contact resistance between bipolar plates and electrodes, large battery flow resistance, and difficulty in charging and discharging with large currents, so as to improve the efficiency of vanadium batteries. Power, reduce battery resistance, eliminate the effect of contact resistance

Active Publication Date: 2013-04-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to propose an integrated electrode for a vanadium battery and a preparation method thereof to solve the problem of excessively high resistivity of the bipolar plate, excessive contact resistance between the bipolar plate and the electrode, and Problems such as high resistance to battery flow, difficulty in charging and discharging with high current, and low energy efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take graphite felt electrode (specification: 560mm×width 320mm×thickness 5mm, bulk density is 0.10g / cm 3 ) and 20g of polyethylene resin powder (PE) with a particle size of 50μm, the dispersion medium is 50mL of toluene, after ultrasonic treatment in the ultrasonic tank for 5h, the polyethylene resin powder is filled in the graphite felt electrode, and the polyethylene resin powder accounts for the volume of the graphite felt electrode 50% of. After taking it out, put it in an oven at 90°C until the toluene has evaporated, then put it into a mold for hot pressing on a hot press after drying, the hot pressing temperature is 160°C, the hot pressing time is 20min, and the pressure is 1MPa. 50mL was ultrasonically treated in an ultrasonic tank for 1h, after 1.5mm was exposed on both sides of the graphite felt electrode, and after the DMF solution was evaporated in an oven at 70°C, an integrated electrode for a vanadium battery was obtained.

[0026] In this embodiment, the...

Embodiment 2

[0028] Take the graphite felt electrode (specification: length 560mm×width 320mm×thickness 6mm, bulk density is 0.15g / cm 3 ) and 20g of polypropylene resin powder (PP) with a particle size of 80μm, the dispersion medium is 40mL of acetone, after ultrasonic treatment in the ultrasonic tank for 30min, the polypropylene resin powder is filled in the graphite felt electrode, and the polypropylene resin powder accounts for the volume of the graphite felt electrode 60% of. After taking it out, put it in an oven at 90°C until the acetone has evaporated, put it into a mold for hot pressing on a hot press after drying, the hot pressing temperature is 190°C, the hot pressing time is 30min, and the pressure is 1MPa. Ultrasonic treatment in an ultrasonic bath for 1 hour, after 2.0mm of both sides of the graphite felt electrode were exposed, and after the chloroform evaporated in an oven at 70°C, an integrated electrode for a vanadium battery was obtained.

[0029] In this embodiment, the...

Embodiment 3

[0031] Take graphite felt electrode (specification: 560mm×width 320mm×thickness 7mm, bulk density is 0.05g / cm 3 ) and 20g of polyether ether ketone with a particle size of 100μm, the dispersion medium is 50mL of ether, after ultrasonic treatment in the ultrasonic tank for 5h, the polyether ether ketone powder is filled in the graphite felt electrode, and the polyether ether ketone powder accounts for 30%. After taking it out, put it in an oven at 90°C until the ether has evaporated, put it into a mold for hot pressing on a hot press after drying, the hot pressing temperature is 170°C, the hot pressing time is 25min, and the pressure is 0.5MPa, take it out and put it in DMF 50 mL of the solution was ultrasonically treated in an ultrasonic tank for 1 h, and after 2.5 mm were exposed on both sides of the graphite felt electrode, the DMF solution was evaporated in an oven at 70 ° C to obtain an integrated electrode for a vanadium battery.

[0032] In this embodiment, the volume r...

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Abstract

The invention relates to the field of manufacturing of vanadium cells, particularly relates to an integrated electrode for a vanadium cell, and a preparation method thereof, and solves the problems of difficulty in high-current charging and discharging, low energy efficiency, large flow liquid resistance and the like in the prior art. High-molecular resin powder and an electrode are taken as raw materials, volatile resolvent is taken as dispersion medium, resin and the electrode are fully mixed under the action of stirring, and then suction filtration is performed until no resolvent can percolate; and the electrode mixed with the resin powder is placed in a drying oven for drying, then placed in a die for hot-forming, is put into resolvent after being taken out to have resin on the surface to be separated, and is dried in the drying oven so as to form the integrated electrode. According to the working requirements of the vanadium cell, the high-molecular resin and the electrode are prepared into the integrated electrode; and the resistivity can reach 0.01 to 0.1 Omega. cm, so that the physical resistance of the cell is lowered, the high-current charge-discharge capability and the energy efficiency of the vanadium cell can be improved, and the reliability of the vanadium cell can also be improved.

Description

technical field [0001] The invention relates to the field of vanadium battery manufacturing, in particular to an integrated electrode for a vanadium battery and a preparation method thereof. Background technique [0002] Vanadium battery energy storage systems are mainly used in power plants (power stations) for peak regulation to balance loads, large-scale photoelectric conversion, energy storage power for wind power generation, and as energy storage systems in marginal areas, uninterruptible power supplies or emergency power systems. It is the ideal energy storage battery that is most likely to partially replace the lead-acid energy storage battery at present. The industrialization of high-power vanadium batteries as a green energy storage technology will promote the large-scale utilization of wind energy, solar energy, etc., and make my country's renewable energy industry enter the leading stage. It can save energy through the "peak valley" mediation of electricity consum...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88
CPCY02E60/50
Inventor 侯绍宇杨志刚刘建国严川伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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