Week 2 Challenge

Proton Exchange Membrane Fuel Cell

Solid Oxide Fuel Cell

Alkaline Fuel Cell

Direct Methanol Fuel Cell

Advantages

• Lower corrosion due to solid electrolyte.
• The electrolyte management is relatively easier compared to other types of fuel cells.
• Can be operated at lower temperatures and the cell can quickly support the load.

• The cell is a little versatile since it can accept various fuels.
• The cell is very efficient and there is a solid electrolyte present.
• Heat is generated as a by product in the chemical reaction of the cell which makes it a suitable choice for heating systems

• The cost of making the cell is relatively lower than the other types of fuel cells.
• It can be operated at low temperatures.
• The cell can quickly start supporting the load.

• The fuel used is readily available and of very low cost ie. methanol.
• The fuel cell can be operated at low temperature and pressure.

Disadvantages

• The cost of the catalyst used which is platinum is very expensive.
• The fuel cell is very sensitive to the presence of impurities in the fuel.

• Corrosion can occur at higher temperatures which can lead to break down of the cell components.
• It is long time for the cell to start supplying power once switched on and it can be shut down only a limited number of times

• The fuel cell is sensitive to the presence of CO₂.
• Electrolyte management is a little tricky while the conductivity is also to be kept in mind.

• The fuel being a hydrocarbon emits CO_2.
• The rate of oxidation of methanol is much lower than that of hydrogen.
• The chemical reactions involved can reduce the cell voltage over time.

Applications

• Car battery packs and automotive applications

• Power systems and heating systems

• Used in aerospace and aeronautical applications

• Small vehicles like forklifts and electronic gadgets like mobile phones, laptops and cameras.