UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
Home
How it Works
Ask a Question
Search Topics
Webcasts
Our Scientists
Science Links
Contact Information
What are electrochemical cells, and what is electrolysis and how does it work?
Answer 1:

An electrochemical cell is a device that converts chemical energy into electrical energy or vice versa when a chemical reaction is occurring in the cell. Typically, it consists of two metal electrodes immersed into an aqueous solution (electrolyte ) with electrode reactions occurring at the electrode-solution surfaces. Also known colloquially as a battery. When the cell is connected into a suitable circuit it produces a current and delivers energy. In some cells the chemical reactions can be reversed by using another, stronger, source of emf to drive current backwards through the cell and put energy back. (See charging.) An example of such a reversible battery is the 12 V car battery which consists of six 2 V lead-acid cells.
Check out this website to see a nice diagram of an electrochemical cell:
electrochemical cell
Electrolysis is the decomposition of a chemical compound in solution into ions by the action of passing an electric current through the solution. In other words, the production of chemical energy by passing an electric current through a liquid. This process breaks a chemical compound down into its elements by passing a direct current through it. Electrolysis of water, for example, produces hydrogen and oxygen. Electrolysis is not an equilibrium process; in fact, it is intentionally driven far from equilibrium to cause as much breakdown of the compound as possible. In electrolysis, some atoms are oxidized, while others are reduced.


Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2015 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use