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What is a solid-state capacitor? Why must a fast charging power supply use a solid-state capacitor
The full name of solid-state capacitor is: solid-state aluminum electrolytic capacitor. The biggest difference between it and ordinary capacitor (i.e. liquid aluminum electrolytic capacitor) is that different dielectric materials are used. The dielectric material of liquid aluminum capacitor is electrolyte, while the vehicle gauge aluminum electrolytic capacitor.
Since the 1990s, aluminum electrolytic capacitors have made innovative development by replacing electrolyte with solid conductive polymer materials. The conductivity of conductive polymer materials is usually 2-3 orders of magnitude higher than that of electrolyte. Application to aluminum electrolytic capacitors can greatly reduce ESR and improve temperature frequency characteristics; And because the polymer material has good processability and is easy to encapsulate, it greatly promotes the development of chip type aluminum electrolytic capacitor. At present, there are two types of commercial solid-state aluminum electrolytic capacitors: organic semiconductor aluminum electrolytic capacitors (OS-CON) and polymer conductor aluminum electrolytic capacitors (PC-CON).
The structure of the organic semiconductor aluminum electrolytic capacitor is similar to that of the liquid aluminum electrolytic capacitor, and most of them are in-line vertical packaging. The difference is that the cathode material of the solid aluminum polymer electrolytic capacitor uses solid organic semiconductor extract to replace the electrolyte, which effectively solves the problems of electrolyte evaporation, leakage and flammability while improving various electrical properties.
Solid state aluminum polymer chip capacitor is a unique structure formed by combining the characteristics of aluminum electrolytic capacitor and tantalum capacitor. Like liquid aluminum electrolytic capacitors, solid aluminum polymers are mostly in the form of patches. The polymer electrode film with high conductivity is deposited on alumina as the cathode and carbon and silver as the lead out electrode, which is similar to the structure of solid tantalum electrolytic capacitor.
So what's the use of replacing electrolyte with solid conductive polymer?
The solid conductive polymer is mainly used to reduce the equivalent series resistance ESR. Explain with the most basic circuit knowledge that if the conductivity is good, the relative resistance is low. If the resistance is low, the performance in many aspects can be improved.
Due to the use of solid conductive polymers, other performance differences are also derived. For example, the presence of solid electrolyte will not volatilize the liquid at high temperature like liquid electrolyte, and eventually lead to the explosion of the capacitor.
In contrast, the high-temperature performance of the solid state is also stable, because the solid electrolyte used is relatively difficult to decompose at high temperature. At the same time, the service life of solid-state capacitors is significantly longer than that of liquid capacitors.
What is a solid-state capacitor? Why must a fast charging power supply use a solid-state capacitor
The full name of solid-state capacitor is: solid-state aluminum electrolytic capacitor. The biggest difference between it and ordinary capacitor (i.e. liquid aluminum electrolytic capacitor) is that different dielectric materials are used. The dielectric material of liquid aluminum capacitor is electrolyte, while the vehicle gauge aluminum electrolytic capacitor.
Since the 1990s, aluminum electrolytic capacitors have made innovative development by replacing electrolyte with solid conductive polymer materials. The conductivity of conductive polymer materials is usually 2-3 orders of magnitude higher than that of electrolyte. Application to aluminum electrolytic capacitors can greatly reduce ESR and improve temperature frequency characteristics; And because the polymer material has good processability and is easy to encapsulate, it greatly promotes the development of chip type aluminum electrolytic capacitor. At present, there are two types of commercial solid-state aluminum electrolytic capacitors: organic semiconductor aluminum electrolytic capacitors (OS-CON) and polymer conductor aluminum electrolytic capacitors (PC-CON).
The structure of the organic semiconductor aluminum electrolytic capacitor is similar to that of the liquid aluminum electrolytic capacitor, and most of them are in-line vertical packaging. The difference is that the cathode material of the solid aluminum polymer electrolytic capacitor uses solid organic semiconductor extract to replace the electrolyte, which effectively solves the problems of electrolyte evaporation, leakage and flammability while improving various electrical properties.
Solid state aluminum polymer chip capacitor is a unique structure formed by combining the characteristics of aluminum electrolytic capacitor and tantalum capacitor. Like liquid aluminum electrolytic capacitors, solid aluminum polymers are mostly in the form of patches. The polymer electrode film with high conductivity is deposited on alumina as the cathode and carbon and silver as the lead out electrode, which is similar to the structure of solid tantalum electrolytic capacitor.
So what's the use of replacing electrolyte with solid conductive polymer?
The solid conductive polymer is mainly used to reduce the equivalent series resistance ESR. Explain with the most basic circuit knowledge that if the conductivity is good, the relative resistance is low. If the resistance is low, the performance in many aspects can be improved.
Due to the use of solid conductive polymers, other performance differences are also derived. For example, the presence of solid electrolyte will not volatilize the liquid at high temperature like liquid electrolyte, and eventually lead to the explosion of the capacitor.
In contrast, the high-temperature performance of the solid state is also stable, because the solid electrolyte used is relatively difficult to decompose at high temperature. At the same time, the service life of solid-state capacitors is significantly longer than that of liquid capacitors.
