Titanium Sintered Felt Acts As the Main Raw Material of Gas Diffusion Layer

Our titanium sintered felt is a kind of titanium sintered fiber felt with a porosity of about 70%. It features reliable quality, good uniformity, high air permeability, high porosity, long service life, and high cost-effectiveness.

It is made of titanium wires that are drawn to a micron-scale diameter, stacked according to a special laying method and then pressurized and placed in a high temperature vacuum environment for sintering. As a result, nodes between fibers are fused, finally, a three-dimensional network structure is formed. We cooperate with many international and domestic well-known companies and universities to develop and optimize our products and provide high quality and good price products for hydrogen production market.

Sintering Production

• Product Name: Titanium sintered fiber felt
• Raw Material: GR1 titanium fiber
• Size: customized (0.2/0.4/0.6/0.8 mm)
• Shape: custom (polygon, round, ring, disc, etc.)
• Porosity: 60%–80%.

Characteristics of titanium sintered felt for hydrogen generation and application：

• Anti-corrosion;
• High specific strength;
• High temperature resistance;
• Large porosity;
• Large surface area, strong dirt holding capacity;
• Washable and reusable.

Proton exchange membrane fuel cell (PEMFC) is a type of fuel cell generating electricity and operating on the opposite principle to PEM electrolysis, which consumes electricity. They are a leading candidate to replace the aging alkaline fuel-cell technology. Titanium sintered felt is placed in the gas diffusion layer and plays the role of air guide, drainage, electronic conductivity and support. The gas diffusion layer is mainly made of titanium sintered felt as raw materials, with a porosity of 60% to 80%. After hydrophobic treatment, hydrophilic channels and hydrophobic channels are formed. The hydrophilic channels can lead the water in the catalyst layer into the bipolar plate, while the hydrophobic channels provide transport paths for gas diffusion.

• Air Guide & Drainage Function
  Gas diffusion layer plays an important role in PEMFC membrane electrode and can effectively transport the hydrogen and oxygen in the bipolar plate to the catalytic layer to meet the reaction needs of catalytic layer; meanwhile, it can also drain out water generated in the catalytic layer to avoid water accumulating in the catalytic layer and hindering the progress of reaction. This phenomenon is called "water logging". Therefore, the diffusion layer needs to be a porous material to ensure it has both good air permeability and good drainage performance.
• Conductive & Support Function
  The gas diffusion layer requires good electronic conductivity, so that the electrons generated from the catalytic layer can pass through the diffusion layer and reach the bipolar plate. In addition, the gas diffusion layer also provides a certain support strength for the membrane electrode. The gas diffusion layer is the thickness part of the membrane electrode, generally greater than 100 μm.

The working principle of proton exchange membrane fuel cell

Titanium sintered felt for gas diffusion layer

Titanium sintered felt details