Leclanche Cell
Definition and meaning of Leclanche Cell in chemistry.
The Leclanche cell is a primary battery that generates electricity through the oxidation of zinc and the reduction of manganese dioxide. It is the direct historical predecessor of the modern alkaline and zinc-carbon batteries widely used today.
In more detail
Originally invented by the French scientist Georges Leclanche in 1866, the cell utilizes a zinc anode, a carbon cathode, and an electrolyte solution of ammonium chloride. During discharge, the zinc metal is oxidized and dissolves into the electrolyte, releasing electrons. These electrons flow through an external circuit to the carbon cathode, where the manganese dioxide is reduced. While the original design utilized a liquid electrolyte, it was later adapted into the dry cell format by replacing the liquid with a moist electrolyte paste, which prevented leaks and allowed for portable consumer use.
Key facts
| Field | Physical Chemistry |
|---|---|
| Anode material | Zinc |
| Electrolyte Formula | NH4Cl |
The standard heavy-duty AA batteries used in television remote controls and small flashlights operate on the fundamental chemical principles of the Leclanche dry cell.
Frequently asked questions
Is a standard Leclanche cell rechargeable?
No, standard Leclanche cells are primary cells, meaning their chemical reactions are largely irreversible and they cannot be effectively recharged.