Ternary battery refers to a ternary lithium ion battery, which refers to a lithium ion battery whose positive electrode material uses lithium nickel cobalt manganese (Li(NiCoMn)O2) ternary positive electrode material. The ternary composite positive electrode material precursor product is based on nickel salt, Cobalt salts and manganese salts are used as raw materials, and the ratio of nickel, cobalt, and manganese can be adjusted according to actual needs. Batteries with ternary materials as positive electrodes are safer than lithium cobalt oxide batteries.
Ternary lithium batteries are suitable for power batteries or small batteries, especially those with relatively high capacity. At present, the batteries of ternary materials have replaced the lithium cobalt oxide batteries that were widely used before, and are widely used in the field of notebook batteries.
At present, the important and popular lithium-ion batteries on the market include lithium iron phosphate batteries and ternary lithium ion batteries. Under such circumstances, which is better, ternary lithium ion batteries or lithium iron phosphate batteries? Let's see which of the two is better.
1. LITHIUM IRON PHOSPHATE BATTERY
Lithium iron phosphate battery: The raw materials phosphorus and iron are rich in resources on the earth, and the supply channels are less restricted. Moderate voltage (3.2V), large capacity per unit weight (170mAh/g), high discharge power, fast charging and long cycle life, higher stability in high temperature and high heat environment than other types of batteries.
Compared with the more common ternary lithium diamond oxide and lithium manganate ion batteries on the market, lithium iron phosphate batteries have at least the following five advantages: higher safety, longer service life, no rare metals and Heavy metal pollution, fast charging support, wide operating temperature range.
2. THE TERNARY LITHIUM BATTERY
Ternary polymer lithium ion battery: the positive electrode material uses nickel cobalt lithium manganate (Li(NiCoMn)O2) ternary positive electrode material lithium ion battery, specifically refers to the positive electrode is ternary, the negative electrode is graphite "ternary power lithium battery" ". The other positive electrode is ternary, and the negative electrode is lithium titanate, which is usually called "lithium titanate" and does not belong to the so-called "ternary material."
The ternary lithium-ion battery has high energy density, and the cycle performance is better than that of normal lithium cobalt oxide. At present, with the continuous improvement of the formula and the improvement of the structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of the lithium ion battery.
3. COMPARISON OF TERNARY LITHIUM BATTERIES AND LITHIUM IRON PHOSPHATE BATTERIES
1> Lithium iron phosphate battery is richer than ternary lithium ion battery (containing cobalt, which is a precious and rare mining city) in terms of the richness of raw materials;
2> In terms of manufacturing cost, lithium iron phosphate batteries are cheaper than ternary lithium ion batteries, and are more suitable for low-end market demand;
3> The energy density of ternary lithium-ion batteries is higher than that of lithium iron phosphate batteries, and the capacity of ternary lithium-ion batteries is larger in the same battery space;
4> The lithium iron phosphate battery is better than the ternary polymer lithium ion battery in terms of environmental temperature adaptation and stability. It can be seen that these two kinds of batteries have their own advantages, depending on the environment in which the product is used;
5> In terms of cycle life, the theoretical value of lithium iron phosphate battery is longer than that of ternary lithium ion battery;
6> In terms of high temperature resistance, the electric heating peak of lithium iron phosphate can reach 350℃-500℃, while lithium manganate and lithium cobaltate are only around 200℃;
7> In terms of low temperature performance, ternary lithium-ion batteries are better than lithium iron phosphate batteries.
Compared with the lithium iron phosphate battery, the ternary lithium battery has a much higher weight energy density, about 200Wh/kg, which means that the ternary lithium battery of the same weight has a longer cruising range than the lithium iron phosphate battery.
CONCLUSION:
Lithium iron phosphate battery is safe, long life and high temperature resistance; ternary lithium battery is light in weight, high charging efficiency, and low temperature resistance.