How do batteries generate electricity through chemistry?
Quick Answer
Batteries convert chemical energy into electrical energy through redox reactions. Electrons flow through an external circuit while ions move inside the battery to balance charge.
The Full Story
A battery contains two electrodes and an electrolyte that allow chemical reactions to create a voltage difference. At the anode, oxidation releases electrons; at the cathode, reduction uses them. This creates a flow of electrons through a circuit that can power a device. The principle was demonstrated by Alessandro Volta in 1800 with the first voltaic pile. Modern batteries range from disposable alkaline cells to rechargeable lithium-ion batteries used in phones and electric cars.
Key Facts
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