the.com/cathode
the electrode where electrons crash the party and reduction always happens
means The electrode through which conventional current leaves a device — the terminal where reduction (the gain of electrons) takes place.
from Coined in the 1830s by William Whewell at Michael Faraday's request, from Greek 'kathodos' meaning 'a way down' or 'descent' (kata-, 'down,' plus hodos, 'way' or 'path'). Faraday imagined current as flowing like the sun, and the cathode was the 'westward' or downward path — a sibling of 'anode,' the 'way up.' The same hodos, 'road,' wanders through 'exodus' (the way out) and 'method' (the way after).
- sign flip
- Negative in batteries, positive in electrolysis cells
- glowing ray
- Cathode rays turned out to be electrons
- old screens
- CRT TVs fired electrons from a heated cathode
- name origin
- Greek for the way down, coined by Faraday
- reduction rule
- Always where positive ions gain electrons
vacuum tube cathode — heated filament in crt monitors and early radios that emits electrons
lithium ion battery cathode — positive terminal in smartphones and evs, typically lithium metal oxide
electroplating cathode — the object being coated in chrome plating or copper electrorefining