What is a Supercapacitor?
A supercapacitor, also known as an ultracapacitor or electrochemical capacitor, is an energy storage device that offers high power density and fast energy discharge and recharge capabilities. It is different from traditional capacitors and batteries due to its unique design and performance characteristics.
Supercapacitors store energy through the mechanism of electrostatic charge separation. They consist of two electrodes, typically made of activated carbon or other porous materials with a large surface area, immersed in an electrolyte solution. The electrodes are separated by a thin insulating layer called a separator, and when a voltage is applied, ions from the electrolyte accumulate at the electrode-electrolyte interfaces.
The energy storage mechanism in a supercapacitor involves the formation of electrical double layers at the electrode-electrolyte interfaces. These double layers consist of a layer of ions close to the electrode surface, known as the Helmholtz layer, and a layer of solvent molecules. The high surface area of the electrodes allows for a large number of ions to be adsorbed, leading to high capacitance.
Supercapacitors can store and deliver electrical energy much more rapidly than traditional batteries. They have high power density, meaning they can rapidly discharge a large amount of energy, and they also have high cycling stability, allowing for a large number of charge and discharge cycles without significant degradation. However, compared to batteries, supercapacitors have lower energy density, meaning they can store less total energy.
Supercapacitors are ideal for various applications such as electronics, transportation, and renewable energy systems. They are used in devices that require rapid energy bursts including regenerative braking systems in electric vehicles, power backup systems, and energy storage for renewable sources like solar and wind. Additionally, they can be used in combination with batteries to improve overall system performance by providing high-power support during peak demands.
Key features of Supercapacitors:
- Ultra low ESR (equivalent series resistance) for very high power density
- Supports unlimited charging and discharging capability
- Large capacitance for high energy density
- Low leakage current
- High specific capacitance
- Increase life of battery operated devices
Supercapacitors from the leading manufacturers are listed on everything PE. You can use the filters on the left side to narrow down the list of products based on your requirements - Type, Capacitance, Voltage Rating and other parameters. Our parametric search tool will scan multiple manufacturer websites to identify Supercapacitors that meet your requirement. You can then download datasheets, get pricing and request quotations via everything PE. Your inquiry will be routed to the manufacturer or their representative who will give you more information on the product.
