What is a Lithium Ion Capacitor?

A brief introduction to the basic principles of lithium-ion supercapacitors. Up to now, supercapacitor technology has been relatively mature and well-known, it is a product between capacitors and batteries. What we are showing today is a lithium-ion supercapacitor. As the name suggests, this is an energy storage device between lithium-ion batteries and supercapacitors. Its main principle is to pre-dope lithium ions through the negative electrode to make the negative electrode The potential almost matches the lithium potential, which can significantly increase the device's operating voltage to 3.8 or even 4V.

Compared with lithium-ion batteries and supercapacitors, the characteristics of lithium-ion supercapacitors are mainly reflected in:

Compared with batteries, supercapacitors have many advantages, such as wide operating temperature (from -40°C to +70°C), high energy density (up to 5kWh/kg), and green raw materials. And its lifespan is still very bad, it can withstand 500,000-1,000,000 deep cycles of charge and discharge, while ordinary batteries are estimated to be unusable if they go through 1,000 deep cycles.

Although supercapacitors are also an energy storage system, they are different from ordinary batteries as we know them. If ordinary lithium batteries are compared to gasoline, then supercapacitors are explosives. Supercapacitors charge and discharge very quickly, much faster than conventional batteries.

However, there are also disadvantages, that is, the supercapacitor's long-term discharge capacity is not as good as that of batteries, so it cannot be used for continuous trickle energy output. And supercapacitors cannot be charged with alternating current, and can only be charged at a dedicated direct current charging station.