General Capacitor is focused on the development of a new generation of high-performance Lithium-ion Capacitors
The Lithium-ion Capacitor (LiC) is a hybrid electrochemical capacitor that offers a combination of high energy density, high power density, and long cycle life.
General Capacitor (GC) is introducing a patented Li-ion Capacitor featuring the highest energy density of any capacitor currently available on the commercial market. LiCs have an operating voltage of 3.8 V to 2.2 V and a cycle life over 250,000 cycles.
Standard products include the 3000 F pouch cell and 200 F pouch cell.
The GC 3000 Farad (F) capacitance LiC pouch cell has a specific energy density of 18 Wh/kg, a volumetric energy density of 30 Wh/L and a specific power density of 8 kW per kg. It offers three times the energy density of a conventional supercapacitor. GC Li-ion Capacitor products are environmentally-friendly, can operate in a wide temperature range of -40° to 65° C, have low instance of self-discharge, and do not face many of the safety risks inherent with lithium-ion batteries.
Li-ion Capacitor Features
Higher Voltage of 3.8 V
The LiC has a higher maximum voltage of 3.8 V compared to 2.7 V in conventional supercapacitors.
Increased Energy Density
The GC 3000 F LiC pouch cell can currently achieve an energy density of 18 Wh/kg. This is a major improvement over conventional supercapacitors, which are only capable of 5-7 Wh/kg of specific and volumetric energy density.
Long Cycle Life
GC Li-ion Capacitors are capable of over 250,000 discharge cycles without dropping below 80% of its initial capacitance. Most batteries are only capable of 500-1000 discharge cycles.
The high-power and cycling performance of LiCs are applied in capacitor-battery hybrid energy storage systems. These systems use LiCs to provide peak power assistance to batteries, prolonging lifetime and enhancing overall system capabilities.
Wide Operational Temperature Range
GC Li-ion Capacitors are tested for reliability under extreme temperatures to simulate all possible applications. For example, LiCs are tested in temperatures of 65° C to simulate the heat of solar panels and wind farms and below -30° C to recreate the freezing conditions satellites experience in low orbit.
Safer than Lithium Batteries
LiC technology is inherently much safer to use than lithium batteries, in which electrical thermal runaway reactions can occur that cause overheating and explosion. LiCs, like other capacitors, utilize the principles of electrostatic charge and contain much less lithium and electrolyte compared to batteries. LiC cells can be bent and even punctured without causing flammability hazards and do not suffer from many restrictions in transportation.
Li-ion Capacitor Technology