Charging of Cells
Chemistry: AQA GCSE Higher, topic 5.2.4
Rechargeable vs Non-Rechargeable
Cells and batteries can be either rechargeable or non-rechargeable.
Non-rechargeable
- In non-rechargeable cells and batteries (e.g. alkaline batteries), irreversible reactions take place at the electrodes.
- This means that electricity can no longer be produced as soon as one of the reacting chemicals has run out.
Rechargeable
- In rechargeable cells and batteries, connection to an electric current reverses the reactions that happen at the electrodes.
- This means that electricity can continue to be produced as long as there is access to this external electric current.
Test yourself on Charging of Cells
Why are alkaline batteries classified as non-rechargeable?
Why can a rechargeable battery keep producing electricity as long as it stays connected to an external current?
What happens to a rechargeable battery if it is disconnected from an external electric current?
Why can't a non-rechargeable battery be recharged by connecting it to an electric current?
What is the definition of a charging cycle in the context of rechargeable batteries?