Lithium-ion capacitor have more advantages than lithium ion batteries and supercapacitors

Source: 2020 - 03 - 28 direction for clicks: first lithium ion capacitor have more advantages than lithium ion battery and super capacitor ( 1) Capacity, voltage, self-discharge more lithium-ion capacitor energy density is lower than the lithium ion battery, but the output density than lithium ion batteries. Unit volume energy density for 10 ~ 15 wh/L, is more than double layer capacitance of 2 ~ 8 wh/L capacity, is twice the double layer capacitance. In terms of voltage, the largest lithium-ion capacitor voltage can reach 4 v, close to the lithium ion battery, but far higher than that of double layer capacitor, in terms of self-discharge less than double layer capacitor. ( 2) Safety of lithium ion battery anode due to use lithium oxide, not only contains a lot of lithium can constitute a lithium dendrite and the penetrating crack, also contain oxygen is an important element of fire. Once the battery short circuit, can develop into hot differentiation as a whole, and electrolyte reverberation can lead to burning. And the anode of lithium ion capacitor is activated carbon, even internal short circuit and negative response, but no reaction with electrolyte, in theory, will be much safer than lithium battery. ( 3) Long life in order to complete the long life of lithium ion battery, it has a certain depth of the charge and discharge, thus reducing the capacity of the essence can be used. Double layer capacitor charging and discharging principle is by simply absorbing or splitting the electrolyte ions to prolong the service life of purpose, but it is difficult to extend service life. However, even if the positive potential of the lithium ion capacitor, voltage of the device itself will not declined significantly, thus ensuring the capacity. ( 4) Resistance to high temperature under the condition of high temperature, electrolyte and cathode simple attack oxidation differentiation, therefore, under the condition of high temperature may need to reduce the anode potential, but the fall in potential, the electric double layer capacitor voltage drop, all can't guarantee the capacitance. Lithium ion battery cannot reduce pressure, on the other hand, will only cause safety problem. Can only be used in lithium ion capacitor from oxidation of differentiation in the anode potential, so its high temperature performance.