Brief introduction of electrolytic capacitor

Electrolytic capacitors have electrolyte materials for storing charges, which are divided into positive and negative electrodes, similar to batteries, and cannot be reversed. The positive electrode is a metal substrate with an oxide film attached, and the negative electrode is connected with electrolyte (solid and non-solid) through a metal plate. The electrodeless (bipolar) electrolytic capacitor adopts double oxide film structure, which is similar to the connection of two negative electrodes of two polar electrolytic capacitors. The two electrodes are connected by two metal plates (both with oxide films), and the electrolyte is between the two groups of oxide films. Polar electrolytic capacitors usually play the roles of power supply filtering, decoupling (U), signal coupling, time constant setting and DC isolation in power supply circuits or medium and low frequency circuits. Non-polar electrolytic capacitors are often used in audio frequency division circuits, TV S correction circuits and single-phase motor starting circuits.