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- Dictionaryfuel cell/ˈfjuː(ə)l sɛl/
noun
- 1. a cell producing an electric current direct from a chemical reaction.
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noun
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A fuel cell is an electrochemical cell that converts the chemical energy of a fuel and an oxidizing agent into electricity through a pair of redox reactions. Fuel cells are different from most batteries in requiring a continuous source of fuel and oxygen (usually from air) to sustain the chemical reaction, whereas in a battery the chemical energy usually comes from substances that are already pres... Wikipedia