What are the characteristics of ternary lithium batteries?
Release time：
2023-03-07 15:18
Source：
Due to the low energy density of lithium cobalt oxide batteries, and the high energy density of nickel-cadmium or nickel-cobalt oxide batteries, the advantages of ternary lithium-ion batteries are: smaller volume, higher capacity density, low temperature resistance, and better cycle performance. Well, it is the flagship of new energy passenger vehicles.
The ternary lithium-ion battery has high energy density and better cycle performance than normal lithium cobaltate. At present, with the continuous improvement of formula and perfect structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded that of lithium cobaltate. Ion battery level.
Ternary material lithium-ion batteries mainly include nickel cobalt aluminate lithium ion battery, nickel cobalt manganate lithium ion battery, etc. The high temperature structure is unstable, resulting in poor high temperature safety, and the high pH value is easy to make the monomer flatulence, and then cause failure. The cost is not low under the current conditions.
Battery positive electrode: composed of trivalent elements, such as fe2+, co32-, etc.;
negative electrode: graphite is mainly used as the negative electrode material, and carbon fiber or silicon carbon composite negative electrode can also be used;
diaphragm: pe diaphragm is generally used;
electrolyte: organic solvent is generally used as the The solvent of the electrolyte;
in terms of safety: the safety of iron phosphate batteries is better, but there are problems of self-discharge and low capacity. The advantages of ternary materials lie in their high specific energy and power performance and good safety . Under the same volume, more electric energy can be stored and used for a longer period of time, while the cost is relatively low and the production process is clean and environmentally friendly.
