Introducing the Next Generation of Hybrid Ultracapacitors
The Lithium-ion Capacitor
The Lithium-ion Capacitor is a hybrid electrochemical capacitor that combines the high energy density and low leakage current of a battery with the rapid charge-discharge rate and excellent cycling performance of an ultracapacitor.
General Capacitor (GC) is introducing a patented Li-ion Capacitor (LiC) that features the highest energy density of any commercial capacitor currently available. The GC LiC operates at 3.8 - 2.2V and offers 3-4 times more energy density than conventional ultracapacitors, also known as electric double-layer capacitors (EDLC). The GC Li-ion Capacitor can handle 18 Watthours per kilogram of specific energy compared to only 6-7 Wh/kg from the industry-leading EDLC.
GC has developed both a 200Farad (F) and 3000F capacitance prototype LiC pouch cell and can also customize laminate pouch cells to fit various form factors.
The GC 3000F LiC contains 18 Wh/kg of specific energy density and 30 Wh/L of volumetric energy density. It is designed to deliver pulsed power- and capable of 8 kW/kg of power density with a maximum current of 150 A.
GC LiCs are reliable within a temperature range of -40° to 65° C, have low instance of self-discharge, are environmentally-friendly, and do not suffer from hazards such as thermal runaway reactions inherent in lithium-ion batteries.
Li-ion Capacitor Features
Excellent Cycling Performance
GC Li-ion Capacitors are able to perform over 300,000 charge cycles while retaining over 80% of initial capacitance. Most rechargeable batteries are capable of less than 1000 charge cycles within that threshold.
The high charging efficiency and extended cycle life of LiCs are well-suited for battery-capacitor hybrid systems. These systems enable capacitors to smooth power output by providing auxiliary power to boost batteries- enhancing power functions and preventing batteries from having to perform deep discharges, which improves performance and prolongs lifetime.
Wide Temperature Range
GC Li-ion Capacitors are tested for reliability in a wide temperature range to simulate potential applications. For example, LiCs are tested in temperatures up to 65° C to simulate the conditions in electric vehicle engines and near solar panels. On the other end of the spectrum, they are tested at freezing temperatures down to -40° C to simulate arctic and aerospace environments, such as those experienced by satellites in low Earth orbit.
LiC technology is inherently much safer than lithium-ion battery technology. Li-ion capacitors mostly utilize electrostatic properties over chemical, and eliminates the possibility of dangerous thermal runaway reactions. LiCs also contain much less lithium and electrolyte per unit compared to Li-ion batteries. LiC cells are safe, reliable, completely nontoxic, and aren't as heavily regulated as lithium batteries for transportation.
Li-ion Capacitor Tech