Fuel cell bipolar plate based on carbon nanotube film composite material and preparation method and application thereof

A carbon nanotube film and fuel cell technology, which is applied in fuel cells, applications, and other household appliances, can solve the problems of difficult promotion, long process cycle, and high production cost, and achieve excellent electrical conductivity, improved corrosion resistance, and air tightness Sexuality and mechanical performance improvement effect

Active Publication Date: 2021-01-19
BEIJING NEW ENERGY VEHICLE TECH INNOVATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of the existing bipolar plates made of composite materials are that the preparation cost is high and the process cycle is long, the electrical conductivity and mechanical strength still need to be improved, and it is difficult to be widely promoted in the field of large-scale energy storage stacks

Method used

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  • Fuel cell bipolar plate based on carbon nanotube film composite material and preparation method and application thereof
  • Fuel cell bipolar plate based on carbon nanotube film composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] This example is used to illustrate the preparation of carbon nanotube films by floating catalytic method.

[0083] The main devices used are as follows: carrier gas system, including gas circuit and flow controller; carbon source / catalyst propulsion system, including micro injection pump and carbon source / catalyst mixed solution; high temperature tube furnace, equipped with 99 pure corundum tubes, the maximum The temperature is 1600°C, the length of the constant temperature zone is 20cm; and exhaust gas system.

[0084] Under the protection of argon, the mixed system of carbon source ethanol, thiophene and catalyst ferrocene (the molar ratio of ethanol, thiophene and ferrocene is 1:1:0.05) is mixed at a speed of 0.15ml / min through the carbon source / catalyst propulsion system Inject into a high temperature tube furnace at 1300°C. At the other end of the high-temperature tube furnace, a winding device is used to collect the formed carbon nanotube airgel, and 70% ethanol ...

Embodiment 2

[0087] refer to figure 1 , which shows the fabrication process flow of bipolar plates for fuel cells.

[0088] (1) preparation concentration is the N,N-dimethylformamide dilution of the E51 type epoxy resin of 5% by weight;

[0089] (2) Place the carbon nanotube film prepared in Example 1 in the N,N-dimethylformamide dilution of E51 type epoxy resin and immerse for 2 hours;

[0090] (3) Take out the carbon nanotube film and suck off the excessive diluent on both sides of the carbon nanotube film with a breathable tetrafluorocloth, then place it in a vacuum oven, and perform a vacuum treatment at 80° C. for 0.5 hour, wherein the degree of vacuum is 0.5KPa;

[0091] (4) the carbon nanotube membrane material obtained in step (3) is placed between two flat polytetrafluoroethylene membranes, and placed in a press and cold-pressed under a pressure of 5MPa to obtain cold-pressed carbon The nanotube film material layer has a thickness of about 0.01mm, wherein the cold pressing tempe...

Embodiment 3

[0095] refer to figure 1 , which shows the fabrication process flow of bipolar plates for fuel cells.

[0096] (1) Using polyvinylidene fluoride with a trade name of SOLEF PVDF 5130 purchased from Solvay in the United States to prepare a N,N-dimethylformamide dilution of polyvinylidene fluoride with a concentration of 2% by weight;

[0097] (2) Place the carbon nanotube film prepared in Example 1 in the N,N-dimethylformamide dilution of polyvinylidene fluoride and immerse for 0.5 hours;

[0098] (3) Take out the carbon nanotube film and suck off the excessive diluent on both sides of the carbon nanotube film with a breathable tetrafluorocloth, then place it in a vacuum oven, and perform a vacuum treatment at 50°C for 1 hour, wherein the degree of vacuum is 0.2KPa;

[0099] (4) the carbon nanotube membrane material obtained in step (3) is placed between two flat polytetrafluoroethylene membranes, and placed in a press and cold-pressed under a pressure of 10MPa to obtain the ca...

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Abstract

The invention provides a fuel cell bipolar plate based on a carbon nanotube film composite material and a preparation method and application thereof. The fuel cell bipolar plate is the carbon nanotubefilm composite material containing a carbon nanotube film and a resin matrix, and the weight ratio of the carbon nanotube film to the resin matrix is 1.5: 1-3: 1, wherein the conductivity of the carbon nanotube film composite material is greater than or equal to 103S/cm. The fuel cell bipolar plate provided by the invention has high conductivity and mechanical strength, and has excellent corrosion resistance.

Description

technical field [0001] The invention relates to a fuel cell bipolar plate based on a carbon nanotube film composite material and a preparation method and application thereof. Background technique [0002] A fuel cell (Fuel Cell) is an energy conversion device that can directly convert chemical energy into electrical energy. It has the advantages of high energy conversion efficiency (40-60%), environmental friendliness, fast start-up speed, and long working life. Since its inception, due to these outstanding advantages, fuel cells have attracted the attention of governments around the world, and are considered to be one of the most potential clean and efficient energy conversion technologies in the 21st century. [0003] Proton Exchange Membrane Fuel Cell (PEMFC) uses hydrogen as fuel and air or oxygen as oxidant. In addition to the general characteristics of fuel cells (such as high energy conversion efficiency and environmental friendliness), it also has It can be quickly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0226H01M8/0213H01M8/0221B29C43/02B29B15/10B29L7/00
CPCB29B15/10B29C43/02B29L2007/002H01M8/0213H01M8/0221H01M8/0226Y02E60/50Y02P70/50
Inventor 张振翀魏跃远原诚寅梁晨陈雨时段伦成
Owner BEIJING NEW ENERGY VEHICLE TECH INNOVATION CENT CO LTD
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