We are searching data for your request:
Upon completion, a link will appear to access the found materials.
The alkaline fuel cell
Properties and structure
The alkaline fuel cell (English Alkaline Fuel Cell (AFC) is a low temperature fuel cell. It works in the temperature range of approx. until and achieves efficiencies between until . The oxygen used as the oxidizing agent must also be very pure.
Potash lye (usually 30%) serves as the electrolyte in these cells. For example, platinum or Raney nickel is used as a catalyst in the graphite gas diffusion electrodes.
Advantages and disadvantages
- good efficiency
- Use of inexpensive catalysts
- Intolerance to carbon dioxide (CO2), since the potassium hydroxide crystallizes out of the potassium hydroxide otherwise to form insoluble carbonate. For this reason, the AFC can only be used with highly pure, i.e. CO2-free fuels are operated, i.e. pure water and oxygen. Because of its CO2Content cannot be used.
Military (e.g. submarine drives), on-board power supply for manned space shuttles