Product Details
Hydrogen fuel cells are a clean and efficient energy technology that converts the chemical energy of hydrogen into electricity through a chemical reaction with oxygen or another oxidizing agent. This process generates water as the only byproduct, making hydrogen fuel cells an environmentally friendly alternative to traditional fossil fuel-based power generation methods.
At the heart of a hydrogen fuel cell is the gas diffusion layer (GDL), which plays a critical role in facilitating the flow of gases and the removal of water from the cell. The GDL is typically made of carbon-based materials, such as carbon paper or carbon cloth, which are porous and conductive. These properties allow for the efficient transport of hydrogen and oxygen to the catalyst layer, where the electrochemical reaction takes place, and the removal of water produced during the reaction.
One innovative material that has been explored for use in gas diffusion layers is platinum-coated titanium fiber felt. This material combines the high electrical conductivity of titanium with the catalytic properties of platinum, making it an attractive option for use in hydrogen fuel cells.
Titanium fiber felt is a porous, flexible material made from interlocking titanium fibers. It has a high surface area, which allows for efficient gas diffusion, and is also highly conductive, which is essential for transferring electrons generated during the fuel cell reaction. Additionally, titanium is known for its corrosion resistance, which is important in the harsh environment of a fuel cell, where high temperatures and acidic conditions can cause degradation of materials.
Platinum is a well-known catalyst for the electrochemical reactions that occur in fuel cells. By coating the titanium fiber felt with a thin layer of platinum, the material becomes even more effective at promoting the desired chemical reactions. The platinum coating provides a large number of active sites for the reaction to occur, increasing the overall efficiency of the fuel cell.
The combination of platinum-coated titanium fiber felt with other components of a hydrogen fuel cell, such as the membrane electrode assembly (MEA) and bipolar plates, creates a highly efficient and durable system. The MEA consists of a proton exchange membrane sandwiched between two catalyst layers, one for the anode (hydrogen oxidation) and one for the cathode (oxygen reduction). The bipolar plates provide structural support and electrical conduction between individual cells in a fuel cell stack.
When hydrogen and oxygen are supplied to the fuel cell, they diffuse through the GDL and reach the catalyst layers, where the platinum-coated titanium fiber felt promotes the electrochemical reactions. At the anode, hydrogen molecules are split into protons and electrons. The protons pass through the membrane to the cathode, while the electrons are conducted through the external circuit to power an electrical load. At the cathode, oxygen molecules combine with the protons and electrons to form water, which is then removed from the cell through the GDL.
The use of platinum-coated titanium fiber felt in gas diffusion layers offers several advantages over traditional carbon-based materials. Firstly, the high electrical conductivity of titanium ensures efficient electron transfer, reducing losses and improving overall cell performance. Secondly, the corrosion resistance of titanium provides enhanced durability in harsh operating conditions, extending the lifespan of the fuel cell. Finally, the catalytic properties of platinum enhance the rate of the electrochemical reactions, leading to higher power densities and increased efficiency.
Parameters
Product type : Titanium felt
Material : Titanium
Thickness : 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1mm, etc
Porosity : 60% - 70%
Size : 500mm×500mm, 650*650mm, etc
Technique : Sintering
