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Bipolar plate for vanadium battery and preparation method for bipolar plate

A bipolar plate and vanadium battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of high contact resistance and high resistivity of composite bipolar plates, and achieve good contact, good viscosity, and high conductivity.

Active Publication Date: 2013-01-23
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

[0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to propose a novel bipolar plate for vanadium batteries and its preparation method, to solve the problem of high resistivity and contact resistance of polymer-carbon material composite bipolar plates in the prior art. Too big and other problems

Method used

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  • Bipolar plate for vanadium battery and preparation method for bipolar plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take graphite felt electrode (specification: 560mm×width 320mm×thickness 5mm, bulk density is 0.10g / cm 3 ) and polyethylene resin powder (PE) 20g, deionized water 50mL, sonicate in the ultrasonic tank for 5h, take it out and put it in the oven at 90°C until the water evaporates, take it out as the skeleton layer, and fill the polyethylene resin powder in the graphite felt In the electrode, polyethylene resin powder accounts for 50% of the volume of the graphite felt electrode. Then take 10g of conductive carbon black, 5g of carbon fiber powder, and 15g of polyethylene resin powder and place them in a high-mixer at a stirring speed of 800 rpm for 20 minutes to make a conductive agent. Then put the conductive agent on the skeleton layer, and put graphite felt on the upper and lower surfaces for hot-pressing. The hot-pressing temperature is 180°C, the hot-pressing time is 20min, and the pressure is 1MPa to obtain a new type of bipolar plate for vanadium batteries.

[0027...

Embodiment 2

[0029] Take the graphite felt electrode (specification: length 560mm×width 320mm×thickness 6mm, bulk density is 0.15g / cm 3 ) and polypropylene resin powder (PP) 20g, deionized water 40mL, ultrasonic treatment in the ultrasonic pool for 30min, after taking it out, put it in the oven at 90°C until the water evaporates, take it out as the skeleton layer, and fill the polypropylene resin powder in the graphite felt In the electrode, the polypropylene resin powder accounts for 60% of the volume of the graphite felt electrode. Then take 15g of conductive carbon black, 5g of carbon fiber powder, and 25g of polypropylene powder and place them in a high-mixer at a stirring speed of 600 rpm for 20 minutes to make a conductive agent. Then put the conductive agent on the skeleton layer, and put graphite felt on the upper and lower surfaces for hot pressing. The hot pressing temperature is 190°C, the hot pressing time is 30min, and the pressure is 0.3MPa to obtain a new type of bipolar pla...

Embodiment 3

[0032] Take graphite felt electrode (specification: 560mm×width 320mm×thickness 5mm, bulk density is 0.05g / cm 3 ) and acrylic resin powder (PA) 20g, deionized water 50mL, sonicate in the ultrasonic tank for 5h, take it out and put it in the oven at 90°C until the water evaporates, take it out as the skeleton layer, and fill the acrylic resin powder in the graphite felt electrode , acrylic resin powder accounted for 30% of the graphite felt electrode volume. Then take 15g of conductive carbon black and 15g of acrylic resin powder and place it in a high mixer at a stirring speed of 800 rpm for 20 minutes to make a conductive agent. Then put the conductive agent on the skeleton layer, and put graphite felt on the upper and lower surfaces for hot-pressing. The hot-pressing temperature is 180°C, the hot-pressing time is 20min, and the pressure is 1MPa to obtain a new type of bipolar plate for vanadium batteries.

[0033] In this embodiment, the volume resistivity of the prepared c...

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Abstract

The invention relates to the field of vanadium battery manufacturing, in particular to a novel bipolar plate for a vanadium battery and a preparation method for the bipolar plate, and solves the problems of high battery internal resistance, low energy efficiency and the like in the prior art. The bipolar plate consists of three parts, namely an electrode, a framework layer and an electrode; and the electrodes and the framework layer are adhered through conductive agents to form the integral bipolar plate for the vanadium battery. According to working requirements of the vanadium battery, heat-resistant and corrosion-resistant polymer resin and conducting agents and electrodes are taken as the central framework layer, so that the bipolar plate having high conductivity, high strength and corrosion resistance is prepared; and the resistivity of the bipolar plate can reach 0.03-0.1 omega.cm, so that the power of the vanadium battery is improved. The bipolar plate provided by the invention has high conductivity and is in good contact with the electrodes; and by using the bipolar plate, the resistance of the vanadium battery is reduced, and the power of the vanadium battery is improved, so that the cost of the vanadium battery is reduced, and the reliability of the vanadium battery is guaranteed.

Description

technical field [0001] The invention relates to the field of vanadium battery manufacturing, in particular to a novel bipolar plate for a vanadium battery and a preparation method thereof. Background technique [0002] Vanadium battery, the full name of vanadium ion redox flow battery, is a new type of green battery. The bipolar plate is one of the key components of the all-vanadium redox flow battery. It plays the role of connecting the positive and negative electrodes of different single cells and conducting the internal circuit of the battery. It is required to have good electrical conductivity, high mechanical strength, chemical oxidation resistance and Electrochemical corrosion performance. At present, the bipolar plates that can be used in vanadium batteries include graphite plates: high cost, difficult processing, and small size; metal base: not resistant to corrosion, high cost; conductive plastic: low cost, poor conductivity, and low mechanical strength. To meet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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