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A kind of stainless steel fiber felt used for fuel cell bipolar plate and its manufacturing method

A fuel cell and manufacturing method technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of commercialization of fuel cells, complex processing technology, poor thermal conductivity that affect fuel cell performance, and achieve good heat and mass transfer performance. , the production process is simple and the cost is low

Inactive Publication Date: 2011-12-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, bipolar plates with microchannel structures manufactured by traditional mechanical processing methods not only have the disadvantages of complicated processing technology, high cost, high quality, low specific surface area, and poor thermal conductivity, but also need surface hydrophobic treatment, which seriously affects fuel cell performance and fuel cell commercialization

Method used

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  • A kind of stainless steel fiber felt used for fuel cell bipolar plate and its manufacturing method
  • A kind of stainless steel fiber felt used for fuel cell bipolar plate and its manufacturing method
  • A kind of stainless steel fiber felt used for fuel cell bipolar plate and its manufacturing method

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Embodiment

[0029] The present invention is used for the stainless steel fiber felt of fuel cell bipolar plate, can adopt following method to realize:

[0030] The first step is cutting method to process stainless steel fiber. First, clean and degrease the surface of the stainless steel round rod workpiece, then clamp the stainless steel rod on a CM6140 lathe, and remove the surface oxide layer by turning. The stainless steel fiber is cut and processed on the lathe by using a multi-tooth tool with a large edge inclination. The tool material is made of superhard high-speed steel, and the tool is made by wire cutting. SEM picture of stainless steel fiber figure 1 As shown, the processed stainless steel fibers have a diameter of 50 μm–200 μm, a zigzag structure at the edge, and a rich multi / microscale surface structure on the surface.

[0031] The second step is the pretreatment of stainless steel fibers. Use shearing equipment to cut stainless steel fibers into short stainless steel fib...

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Abstract

The invention discloses a stainless steel fiber felt used for fuel cell bipolar plates and a manufacturing method thereof, belonging to the technical field of fuel cell bipolar plate flow fields. The manufacturing method of stainless steel fiber mat can be divided into four steps: processing stainless steel fiber by cutting method, pretreatment of stainless steel fiber, molding of fiber mat, and high-temperature solid-state sintering. After the metal fibers are sintered, metallurgical bonding is achieved between the fibers, forming a large number of multi-scale pore structures. The manufactured stainless steel fiber felt has the advantages of high porosity, high specific surface area, good heat and mass transfer performance, surface hydrophobicity, simple manufacturing process and low cost. This method is applicable to manufacture various metal porous materials, and its pore size and porosity can be controlled.

Description

technical field [0001] The invention relates to a stainless steel fiber felt, in particular to a stainless steel fiber felt used for fuel cell bipolar plates and a manufacturing method thereof. Background technique [0002] With the progress of society, the energy crisis and environmental pollution problems faced by human beings are becoming more and more serious. These problems have become the key to restricting the development of the global economy. The development and use of renewable, clean and environmentally friendly new energy is an inevitable trend of future social development. Fuel cell technology emerges as the times require. A fuel cell is a power generation device that can efficiently convert fuel and oxidant directly into electrical energy through electrode reactions. It has the advantages of high energy density, fast startup at room temperature, no pollution to the environment, and no noise. [0003] The bipolar plate is one of the key components of the fuel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/86
CPCY02E60/50
Inventor 万珍平刘彬
Owner SOUTH CHINA UNIV OF TECH
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