Definition - What does Daniell Cell mean?
A Daniell cell is the first highly reliable and practical electric battery, created in the 19th century. In this cell, electrons are capable of being transferred throughout the reaction process from zinc undergoing corrosion through paths that are electrically conductive.
In a Daniell cell, zinc automatically loses electrons relative to copper, putting both metals in salt solutions that cause electrons to pass through external wires, leading from the copper and zinc. This prevents galvanic corrosion from occurring and produces electricity.
Corrosionpedia explains Daniell Cell
The purpose of the Daniell cell is to act as a separator between metals that are in contact with their own sulfates. This is crucial in maintaining a constant voltage in the cell.
This cell uses zinc and copper is a voltaic or galvanic cell, and is characterized by reduction-oxidation reaction that generates electricity.
Through this cell, separation in reactions is possible so that there can be an indirect transfer of electrons that can generate usable electricity. A typical battery consists of two or more cells that are joined together. But in a Daniell cell, a chunk of metal such as zinc is put in the zinc sulfate solution in a container while the copper is submerged in a copper sulfate solution in another container. In this setup, the metals are referred to as the electrodes.
The electrodes serve as the holding place or terminal for electrons. Wires are connected to electrodes that are sustained by a slat bridge in between the containers. With this bridge, the flow of electrons commences, leading to the production of electricity.