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Preparation method of fluororesin-containing conductive plastic bi-polar plate

A technology of conductive plastics and fluorine-containing resins, applied in battery electrodes, circuits, fuel cells, etc., can solve the problems of unfavorable industrial production and slow desolventization process, and achieve the goals of improving chemical stability, overcoming refractory volatilization, and increasing current density Effect

Active Publication Date: 2012-07-25
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the strong interaction between the strong polar organic solvent and the polymer chain in the solution leads to a very slow desolvation process, which is not conducive to large-scale industrial production, and it is necessary to find a suitable dispersing solvent

Method used

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  • Preparation method of fluororesin-containing conductive plastic bi-polar plate
  • Preparation method of fluororesin-containing conductive plastic bi-polar plate

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Experimental program
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Embodiment Construction

[0019] The present invention carries out according to the following steps successively;

[0020] Step (1): According to adding 40-80 milliliters of ethanol to every 10 grams of powdered thermoplastics, measure, add the measured ethanol to the pre-weighed thermoplastic polyvinylidene fluoride and chlorinated polyvinyl chloride; stir for 2 After ~3 minutes, according to the mass percentage of conductive filler / (conductive filler+thermoplastic) measured between 30% and 60%, add expanded graphite as conductive filler, and fully stir at room temperature to form a slurry.

[0021] Step (2): drying the prepared slurry at 70°C to obtain solid powder;

[0022] Step (3): Put the solid powder in a mold for plastic processing, apply a pressure of 11-30 MPa to pre-press for 1-2 minutes, then gradually raise the temperature to 190°C-240°C for 5-25 minutes, and demould after cooling Become a conductive bipolar plate; its thickness is between 1.9 and 2.0 mm.

[0023] The conductive filler i...

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Abstract

The invention relates to a preparation method of a fluororesin-containing conductive plastic bi-polar plate, which belongs to the manufacturing technical field of the flow battery, and is characterized in that ethanol is used as a dispersing agent, polyvinylidene fluoride and polyvinyl chloride are used as thermoplastic plastics, graphite is used as a conductive filler, and the addition quantity of the dispersing agent ethanol is 40 to 80 ml per 10 grams; and the percent by volume of the thermoplastic plastics (polyvinyl chlorid / ( polyvinyl chlorid + polyvinylidene fluoride) is 0 to 5 percent; the percent by volume of the conductive filler (conductive filler / (conductive filler + thermoplastic plastics) is 30 to 60 percent; and the fluororesin-containing conductive plastic bi-polar plateis formed through the same stamping process. The conductivity of the prepared fluororesin-containing conductive plastic bi-polar plate is more than 20 Siemens per centimeter, the technological process is simple, the technical method is stable and reliable, and the mass industrialized production can be realized.

Description

technical field [0001] The invention relates to the technical field of electric energy conversion and storage, in particular to a method for manufacturing a bipolar plate of a liquid flow battery. Background technique [0002] In order to reduce the large amount of carbon dioxide and other greenhouse gas emissions caused by the use of fossil fuels such as coal, as well as the destructiveness of acid gases such as sulfur dioxide to the environment, it is urgent to develop renewable and clean energy utilization technologies such as solar energy and wind energy. However, due to the discontinuous and random characteristics of solar energy, wind energy, and ocean wave energy, they need to be used in conjunction with a certain scale of electric energy storage devices to form a complete power supply system and ensure continuous and stable power supply. Therefore, the development of energy storage systems with high power conversion efficiency, large storage capacity, and good econom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M8/02H01M8/0221
CPCY02E60/50
Inventor 王保国徐冬清成旭光范永生韩洪涛
Owner TSINGHUA UNIV
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