Phosphoric Acid Fuel Cells for Stationary Applications
Fuel cells generate power by electrochemically combining fuel such as hydrogen and oxidant such as oxygen in air to produce electrical and thermal energy. Fuel cells generally consist of an anode electrode where fuel is oxidized and cathode electrode where oxygen in air is reduced. The electrolyte which is usually placed between the two electrodes acts as a medium to transport charge carriers (e.g., H+, CO−). Fuel cells are particularly interesting as energy generating devices because they consume reactants without combustion, thus providing higher efficiencies and avoiding the issue of pollution. A fuel cell reaction typically produces water as a by-product which is usually removed from the cell by reactant exhaust.
KeywordsFuel Cell Catalyst Layer Bipolar Plate Fuel Cell System Cathode Catalyst Layer
Anaerobic digester gas.
Balance of plant. Involves components other than fuel cell stacks in a power plant.
- Bubble pressure
Ability of a component filled with acid to withstand a given pressure of gas.
This process involves heating resin-impregnated material to ∼1,000°C to carbonize.
Combined heat and power. Equipment that generates both electrical and thermal energy.
- Cloud tower
Equipment to deposit catalyst onto GDL.
Electrochemical area, ideally the Pt surface area available for oxygen reduction or Hydrogen oxidation reaction.
Energy output/Energy input.
Electrolyte take-up: Quantity of electrolyte (H3PO4) taken up by a unit weight of carbon.
Fluorinated ethylene propylene.
Mixture of carbon-coated catalyst and PTFE®.
Gas diffusion layers.
Gas diffusion layers or substrates.
This process involves in heating carbon material to temperatures of 2,500–3,000°C to improve thermal conductivity and corrosion resistance.
High-temperature polymer electrolyte membrane fuel cell.
- Ionic resistance
Resistance for the flow of H+ through the electrolyte matrix.
Phosphoric acid fuel cell.
- Performance decay
Loss of fuel cell performance due to kinetic, ionic, or mass transport losses.
The authors would like to acknowledge Tom Jarvi for his valuable input into framing the outline for the entry.
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