Shenzhen Kaifengda Technology Co., Ltd.

Features
(1) Comparison of capacity, voltage and self-discharge
The energy density of lithium-ion capacitors is lower than that of lithium-ion batteries, but the output density is high; the energy density of single volume is 10~15Wh/L, which is much larger than the capacity of 2~8Wh/L of electric double layer capacitors, which is the latter's energy density. Twice.
In terms of voltage, the highest voltage of lithium-ion capacitors can reach 4V, which is similar to that of lithium-ion batteries, much higher than that of electric double-layer capacitors, and smaller than both in terms of self-discharge.
(2) Security
Due to the use of lithium oxide, the positive electrode of lithium-ion batteries not only contains a large amount of lithium, which can form lithium dendrites and pierce the separator, but also contains oxygen, an important ignition element. Once the battery is short-circuited, the overall thermal decomposition can develop, and the reaction with the electrolyte can cause combustion. The positive electrode of lithium-ion capacitors is activated carbon. Even if the internal short circuit will react with the negative electrode, it will not react with the electrolyte. In theory, it will be much safer than lithium batteries.
(3) Long life
In order to achieve long life, lithium-ion batteries have a certain range of charge and discharge depth limits, which reduces the substantially usable capacity. The charge and discharge principle of electric double layer capacitors is simply to adsorb or remove the electrolyte in the It is difficult to extend the practical life by this alone. However, even if the positive electrode potential of the lithium ion capacitor is lowered, the voltage of the cell itself does not drop significantly, so the capacity can be ensured.
(4) High temperature resistance
Under high temperature conditions, the electrolyte and the positive electrode are prone to oxidative decomposition. Therefore, it may be necessary to reduce the potential of the positive electrode under high temperature conditions. However, when the potential decreases, the overall voltage of the electric double layer capacitor will drop, and the capacity cannot be ensured. Lithium-ion batteries, on the other hand, cannot reduce pressure, which is prone to safety problems. Only lithium-ion capacitors can be used in locations where the positive electrode potential is far from the oxidative decomposition region, so they have excellent high-temperature performance.