Method for preparing fuel cell polar plate through 3D printing

A fuel cell plate and 3D printing technology, applied in fuel cells, 3D object support structures, circuits, etc., can solve the problems of difficult processing, low melting temperature of raw materials, poor conductivity, etc., and achieve yield and cost advantages, glass transition temperature The effect of high temperature and high softening temperature

Inactive Publication Date: 2019-02-22
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the preparation process for fuel cell plates in the prior art is complicated, and the processing of irregular flow fields is difficult. However, when using 3D printing technology, the raw materials are relatively limited, and most of the raw materials have low melting temperatures, making it difficult to adapt to fuel cells. At the same time, because most of the raw materials are organic polymer materials, their conductivity is poor, and it is difficult to meet the needs of fuel cell plates.

Method used

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  • Method for preparing fuel cell polar plate through 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] a. Add nano-alloy powder into dichloromethane solvent, stir and sonicate. The ultrasonic power density of sonication is 1.2W / cm 2 , the time is 25min, the stirring speed is 150r / min, and the heating temperature is 55°C; the alloy powder is uniformly dispersed, then polylactic acid and glass fiber are added, and the stirring is continued for 30min, and Tween 20 is further added as an emulsifier, and carried out under stirring. Heating until the solvent is completely volatilized to obtain a solid jelly; wherein, the metal elements in the nano-alloy powder include iron, cobalt, polylactic acid, nano-alloy powder, and glass fiber in a mass ratio of 100:5:1;

[0031] b. Place the solid jelly obtained in step a in a vacuum oven for low-temperature heat treatment. The temperature of the heat treatment is 75° C., and the time is 90 minutes. Then, ball milling, granulation, and wire drawing are performed. The ratio is 6:1, and the time is 14h; the core-shell structure formed by ...

Embodiment 2

[0034] a. Add nano-alloy powder into dichloromethane solvent, stir and sonicate. The ultrasonic power density of sonication is 1.4W / cm 2 , the time is 22min, the stirring speed is 180r / min, and the heating temperature is 57°C; the alloy powder is evenly dispersed, then polylactic acid and glass fiber are added, and the stirring is continued for 30min, and Tween 20 is further added as an emulsifier, and it is carried out under stirring. Heating until the solvent is completely volatilized to obtain a solid jelly; wherein, the metal elements in the nano-alloy powder include nickel, aluminum, polylactic acid, nano-alloy powder, and glass fiber in a mass ratio of 100:5:1;

[0035]b. Place the solid jelly obtained in step a in a vacuum oven for low-temperature heat treatment. The temperature of the heat treatment is 78° C. and the time is 80 minutes. Then ball milling, granulation, and wire drawing are performed. The rotating speed of the ball milling is 450r / min. The ratio is 7:1, ...

Embodiment 3

[0038] a. Add nano-alloy powder into dichloromethane solvent, stir and sonicate. The ultrasonic power density of sonication is 1.6W / cm 2 , the time is 20min, the stirring speed is 200r / min, and the heating temperature is 60°C; the alloy powder is uniformly dispersed, then polylactic acid and glass fiber are added, and the stirring is continued for 30min, and Tween 20 is further added as an emulsifier, and carried out under stirring. Heating until the solvent is completely volatilized to obtain a solid jelly; wherein, the metal elements in the nano-alloy powder include copper, zirconium, polylactic acid, nano-alloy powder, and glass fiber in a mass ratio of 100:5:1;

[0039] b. Place the solid jelly obtained in step a in a vacuum oven for low-temperature heat treatment. The temperature of the heat treatment is 80° C. and the time is 60 minutes. Then ball milling, granulation, and wire drawing are performed. The ratio is 8:1, and the time is 12 hours to prepare the core-shell st...

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Abstract

The invention discloses a method for preparing a fuel cell polar plate through 3D printing. The fuel cell polar plate is prepared by the following steps: (a) sequentially adding nano-alloy powder, polylactic acid, glass fibers and an emulsifying agent into a dichloromethane solvent, so as to prepare solid jelly; (b) carrying out low-temperature thermal treatment on the solid jelly under a vacuum condition, and carrying out ball milling, granulation and wiredrawing, so as to obtain a 3D printing raw material; and (c) printing the 3D printing raw material, carrying out plasma thermal treatment,so as to obtain a core-shell structure fuel cell polar plate material in which an alloy phase is packaged with modified polylactic acid. The method has the beneficial effects that the prepared fuel cell polar plate has good surface hydrophobicity, high glass transition temperature and softening temperature and good conductivity and can adequately meet the demands of fuel cells; and meanwhile, theprocess is simple, the yield and the cost are superior, and the method has potential in large-scale application.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to the preparation of battery polar plates, and in particular to a method for preparing fuel cell polar plates by 3D printing. Background technique [0002] The proton exchange membrane fuel cell is a clean, environmentally friendly and efficient new energy conversion device. It uses hydrogen as fuel, decomposes the gas into protons and electrons through a catalyst, and passes through the proton exchange membrane to combine with oxygen ions generated by oxygen decomposition to form water. Energy is thus released and converted into electric current. The plate material is a key component of the fuel cell, and its role in the fuel cell includes distributing the fuel and oxidant in the cell, collecting and conducting current, and outputting the generated liquid water. [0003] The diversion groove of the fuel cell plate has regular shapes such as serpentine flow field, straight channel flow f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0228B29C64/118B29C64/30B29C71/02B33Y10/00B33Y40/00B33Y70/00B33Y80/00
CPCB29C64/118B29C64/30B29C71/02B33Y10/00B33Y40/00B33Y70/00B33Y80/00H01M8/0228Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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