What is a fuel cell?

How to generate electricity – the reverse of “water electrolysis”

Water electrolysis: the process whereby water is decomposed into hydrogen and oxygen through the application of electrical energy

Fuel cell: a device that generates electricity through electrochemical reactions between hydrogen and oxygen

Oxygen (O2) in the air is used.
Hydrogen (H2) is extracted from natural gas.

How a fuel cell works


  • Ikeda, Hironosuke. Nenryo Denchi no Subete (All about Fuel Cells). Tokyo, Japan: Nippon Jitsugyo Publishing.
  • Homma, Takuya. Zukai, Nenryo Denchi no Subete (All about Fuel Cells, Illustrated). Tokyo, Japan: Kogyo
    Chosakai Publishing Co., Ltd.
  • Website of New Energy and Industrial Technology Development Organization
  • Website of the Japan Gas Association
  • Website of Tokyo Gas Co., Ltd.
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