Week 2 Challenge

Q1)

Four types of fuel cells are

• Polymer Electrolyte Membrane Fuel cells.
• Alkaline Fuel cells.
• Solid Oxide Fuel cells.
• Direct Methanol fuel cells.

Q2)

Thus, we can conclude from the graph that lithium ion, lead acid, and nickel cadmium batteries have low power density and moderate energy density.

The power density and energy density of an ultra capacitor or super capacitor are both moderate.

The fuel cell has a high energy density and a low power density.