Question

define battery in chemistry

Answer 1

Battery: A device that comprises a group of electric cells that converts chemical energy into electrical energy to act as a source of direct current

Answer 2

A battery is a package of one or more galvanic cells used for the production and storage of electric energy by chemical means. A galvanic cell consists of at least two half cells, a reduction cell and an oxidation cell. Chemical reactions in the two half cells provide the energy for the galvanic cell operations.

Each half cell consists of an electrode and an electrolyte solution. Usually the solution contains ions derived from the electrode by oxidation or reduction reaction.

We will make this introduction using a typical setup as depicted here. The picture shows a copper zinc galvanic cell (battery).

A galvanic cell is also called a voltaic cell. The spontaneous reactions in it provide the electric energy or current.

Two half cells can be put together to form anelectrolytic cell, which is used for electrolysis. In this case, electric energy is used to force nonsponaneous chemical reactions.