Ternary lithium-ion batteries have high energy density and better cycle performance than conventional lithium cobalt oxide batteries. Currently, with continuous improvements in formulation and structure, the nominal voltage of these batteries has reached 3.7V, and their capacity has reached or exceeded that of lithium cobalt oxide batteries.
Ternary lithium-ion batteries for power mainly include nickel-cobalt-aluminum lithium-ion batteries and nickel-cobalt-manganese lithium-ion batteries. Their structure is unstable at high temperatures, resulting in poor high-temperature safety. Furthermore, excessively high pH values can cause cells to swell and lead to malfunctions. Under current conditions, their cost is also not low.
What are the advantages and disadvantages of ternary lithium-ion batteries?
The advantages of ternary lithium-ion batteries are: smaller size, higher energy density, low temperature resistance, and better cycle performance, making them the mainstream for new energy passenger vehicles.
The disadvantages of ternary lithium-ion batteries are: poor thermal stability, decomposition at high temperatures of 250-300℃, and particularly strong chemical reactions of ternary lithium materials. Once oxygen molecules are released, the electrolyte burns rapidly under high-temperature conditions, resulting in deflagration.
What is the lifespan of a ternary lithium battery?
The theoretical lifespan of a ternary lithium battery is 1200 times that of a full charge-discharge cycle, i.e., its complete cycle life. Based on usage frequency, charging and discharging once every three days, or 120 times a year, a ternary lithium battery can last approximately 10 years. Battery lifespan is affected by various factors such as driver habits and routine maintenance; actual usage conditions should be considered.
Lithium-ion batteries use ternary cathode materials. There are many types of cathode materials for lithium-ion batteries, including lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, ternary materials, and lithium iron phosphate. Ternary materials combine the advantages of lithium cobalt oxide, lithium nickel oxide, and lithium manganese oxide, possessing excellent characteristics such as high capacity, low cost, and good safety. They are gradually gaining a certain market share in small lithium batteries and have good development prospects in the field of power lithium batteries.
