How Fuel Cells Work
 
Fuel cells produce electricity that can be used as a clean alternative to gasoline. The V Flow fuel-cell stack in the FCX Clarity FCEV combines hydrogen (H2) stored in a tank with oxygen (O2) from the air to generate electricity. The electricity then powers the electric motor, which in turn ultimately propels the vehicle. Water is the only byproduct.


  • Hydrogen fuel is fed into the anode of the fuel cell. Helped by a catalyst, hydrogen atoms are split into electrons and protons
  • Electrons are channeled through a circuit to produce electricity
  • Protons pass through the polymer electrolyte membrane
  • Oxygen (from the air) enters the cathode and combines with the electrons and protons to form water
  • Water vapor and heat are released as byproducts of this reaction
The distinctive, streamlined design of the FCX Clarity Fuel Cell Electric Vehicle (FCEV) is possible because the compact Honda-developed V Flow fuel-cell stack and other powertrain components are distributed evenly throughout the vehicle. Auxiliary regenerated energy is supplied by a lithium-ion battery pack, increasing the vehicle's efficiency and range.
 

More in This Section:
 Natural Gas
 
 Hybrids
 
 Fuel Cells
 
 How Fuel Cells Work
 
 The History of the Honda FCX Clarity FCEV
 
 Timeline
 
 Fuel Cell Resources
 

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