What is the difference between double-layer capacitors and pseudocapacitors?

What is the difference between double-layer capacitors and pseudocapacitors?

1. Carbon materials have good stability and conductivity, as the double layer utilizes the surface of the material. However, this purple transition metal oxide can be utilized in the body. Therefore, the capacitance of the material is much higher, mainly based on theoretical values, and the cycle life and yield are limited.

2. Double layer capacitors store energy by adsorbing charges on the electrode surface, while pseudo capacitors store energy by conducting redox reactions on active electrode materials.

3. In terms of energy storage mechanism, double-layer capacitors can be divided into double-layer capacitors and pseudocapacitors. It is a new type of energy storage device that has the characteristics of high power density, short charging time, long service life, good temperature characteristics, energy conservation, and green environmental protection. Double layer capacitors have a wide range of applications. 

Double layer capacitor

Double layer capacitors are a type of supercapacitor and a new type of energy storage device. Double layer capacitors have extremely small spacing between their double layers, resulting in weak withstand voltage, generally not exceeding 20V. Therefore, they are commonly used as energy storage components in low voltage DC or low-frequency situations. Double layer capacitors have a wide range of applications. Used as a power balancing power source for lifting devices, capable of providing electricity with extremely high currents; As a vehicle starting power source, it has higher starting efficiency and reliability than traditional batteries, and can completely or partially replace traditional batteries.

Pseudo capacitor

Pseudo capacitance, also known as Faraday quasi capacitance, is a highly reversible chemical adsorption, desorption, or oxidation, reduction reaction that occurs on an electrode surface or in a two-dimensional or quasi two-dimensional space in the bulk phase, resulting in capacitance related to the electrode charging potential. Pseudocapacitance can be generated not only on the surface of the electrode, but also within the entire electrode, resulting in higher capacitance and energy density than double layer capacitance. Under the same electrode area, the capacitance can be 10-100 times that of the double layer capacitance corona.