What does PEMFC stand for?
Proton-exchange membrane fuel cells
Proton-exchange membrane fuel cells (PEMFC), also known as polymer electrolyte membrane (PEM) fuel cells, are a type of fuel cell being developed mainly for transport applications, as well as for stationary fuel-cell applications and portable fuel-cell applications.
What is PEM in chemistry?
PEM fuel cells are low temperature fuel cells that use a solid polymer in the form of a solid phase proton conducting membrane as an electrolyte which eliminate the need to contain corrosive liquids.
What is PEM made of?
PEMs can be made from either pure polymer membranes or from composite membranes, where other materials are embedded in a polymer matrix. One of the most common and commercially available PEM materials is the fluoropolymer (PFSA) Nafion, a DuPont product.
What is MEA in fuel cell?
The heart of a PEM fuel cell is the membrane electrode assembly (MEA), which includes the membrane, the catalyst layers, and gas diffusion layers (GDLs).
How does a PEMFC work?
The proton exchange membrane fuel cell (PEMFC) uses a water-based, acidic polymer membrane as its electrolyte, with platinum-based electrodes. The protons pass through the membrane to the cathode side of the cell while the electrons travel in an external circuit, generating the electrical output of the cell.
How efficient is a PEM fuel cell?
The electrical efficiency of PEMFC is 40%–60%. When high-purity H2 is fueled, PEMFC can operate at a higher efficiency (∼60%).
What are the four main parts of a PEMFC Mcq?
What are the four main parts of a PEMFC?
- the catalyst, the battery, the cathode and the anode. the anode, the cathode, the electrolyte and the catalyst.
- the electrolyte, the catalyst, the anode and the generator.
What are PEM fuel cells used for?
PEM fuel cells are the best candidates for powering automobiles. They can also be used for stationary power production. However, due to their low operating temperature, they cannot directly use hydrocarbon fuels, such as natural gas, liquefied natural gas, or ethanol.
How does a Pemfc work?
What are the four main parts of a Pemfc Mcq?
Which electrolyte is used in PEMFC?
The electrolyte material used in PEMFCs is a copolymer of poly(tetrafluoroethylene) and polysulfonyl fluoride vinyl ether. The polymer is stable in both oxidative and reductive environments and has high protonic conductivity (0.2 S/cm) at typical PEMFC operating temperatures.
What is the disadvantage of PEMFC?
Proton Exchange Membrane (PEMFC) The major disadvantage of PEM fuel cells is that they require an expensive catalyst, in this case platinum, which adds to the overall unit cost. Hydrogen delivery is also another significant barrier is it requires careful handling and storage.