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Cathode - GCSE Chemistry Definition

Reviewed by: Philippa Platt

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In GCSE Chemistry, a cathode is an electrode through which electric current flows out of a device or a system. During electrolysis, the cathode is typically the negative electrode in which reduction occurs - this means it is the site where positively charged ions (cations) gain electrons.

In electrochemical cells, such as those in batteries, the cathode is the positive terminal where reduction also takes place. Understanding the role of the cathode is crucial when studying how different substances are separated or how electrical energy is generated and used in chemical reactions.

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Philippa Platt

Reviewer: Philippa Platt

Expertise: Chemistry Content Creator

Philippa has worked as a GCSE and A level chemistry teacher and tutor for over thirteen years. She studied chemistry and sport science at Loughborough University graduating in 2007 having also completed her PGCE in science. Throughout her time as a teacher she was incharge of a boarding house for five years and coached many teams in a variety of sports. When not producing resources with the chemistry team, Philippa enjoys being active outside with her young family and is a very keen gardener

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