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Feature of LIC

1.Satisfy both of Power Density and Energy Density

An ULTIMO cell is a lithium ion capacitor composed of activated charcoal, similar to that used in an electric double layer in the positive electrode and carbon material, similar to that used in a lithium ion battery, in the negative electrode.
An ULTIMO cell uses carbon material similar to that used in a lithium ion battery in its negative electrode; however, our unique design of pre-doping negative electrodes with lithium ions makes it possible to offer next-generation electricity storage devices that achieve compatibility between high power density and high energy density.

2.Long Life

After experiencing a charge-discharge operation of 800,000 cycles, they do not exhibit noticeable deterioration.
(Test condition) Charge: CC 100 A at 3.8 V; discharge: CC 100 A at 2.2 V, both without intermission
CLQ1100S1A (laminate cell 1100F)


After 8,000 hours in operation, they do not exhibit noticeable deterioration.
(Test condition) Applied voltage: 3.8 V in an ambient temperature of 70˚C
CLQ1100S1A(laminate cell 1100F)

An ULTIMO cell can be operated at a cell voltage higher than that of an electric double layer capacitor and has excellent high temperature durability. This characteristic is achieved by a design that uses the pre-doping process to lower the potential of the negative electrode and thereby to restrict an increase in the potential of the positive electrode; at the same time, this suppresses the deterioration of the negative electrode, resulting in high durability even after repetition of charge-discharge cycles.

3.Safety

Tests Conditions Results
Fire Rupture
Overcharge Current: 200 A
State of charge: 250%
Max. voltage: 20 V
with constrainging unit
Not observed Not observed
Over-discharge Current: 200 A
Voltage: 0 V
Not observed Not observed
External short circuit Short resistance: 3 mΩ
Ambient temp.: 55 ºC
Not observed Not observed

In a lithium ion battery, the positive electrode uses metal oxide, which is decomposed thermally as a result of an increase in the cell temperature under abnormal conditions and releases oxygen, with the possibility of triggering a thermal runaway reaction.
On the other hand, an ULTIMO cell uses activated charcoal in the positive electrode and releases heat due to short-circuit or the like under abnormal conditions; however, this does not cause a thermal runaway reaction, exhibiting excellent safety.

* These test results are as observed under test conditions for the respective tests described; identical results cannot be guaranteed under different conditions.