anode
Noun: 1. The negatively charged terminal of a voltaic cell or storage battery that supplies current. In a battery or galvanic cell, the anode is the electrode where oxidation (loss of electrons) occurs, and it is the source of electrons flowing to the external circuit. Despite being the source of electrons, it is labeled as negative in such devices. 2. A positively charged electrode by which electrons leave an electrical device. In an electrolytic cell or an electronic device like a diode or vacuum tube, the anode is the electrode connected to the positive terminal of the power source. It attracts negatively charged ions (anions) or receives the electron flow from the device.
The meaning of "anode" depends on whether the device is generating electrical energy (like a battery) or consuming it (like during electroplating or in a diode). * In a battery (discharging), the anode is the negative terminal. * In a device being powered (like an electrolytic cell), the anode is the positive terminal. * A useful mnemonic is: Anode = Oxidation (both start with vowels) and oxidation involves the loss of electrons.
- In a battery:
- In electrolysis:
- In electronics:
- Sacrificial anode: A metal anode (like zinc or magnesium) that is intentionally corroded to protect a more important metal structure (like a ship's hull or a pipeline) from corrosion. This is a form of cathodic protection.
- A sacrificial anode was attached to the steel pier to prevent rust.
- Anode material: Refers to the substance used to make the anode, which is critical for the performance of batteries and electrolytic processes.
- Graphite is a common anode material in lithium-ion batteries.
- Anodic (adjective): Relating to or functioning as an anode.
- The anodic reaction involves the loss of electrons.
- Anodize (verb): To coat a metal (typically aluminum) with a protective oxide layer by making it the anode in an electrolytic process.
- They anodize the aluminum parts to make them more durable and corrosion-resistant.
- Positive electrode (specifically in electrolytic cells and electronic devices).
- Negative terminal (specifically in batteries and galvanic cells).
- Cathode: The electrode where reduction (gain of electrons) occurs. It is the positive terminal in a battery and the negative terminal in an electrolytic cell.
- the negatively charged terminal of a voltaic cell or storage battery that supplies current
- a positively charged electrode by which electrons leave an electrical device