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How about the performance of the ternary lithium-ion battery?

The current ternary batteries basically refer to ternary lithium-ion batteries, including ternary soft pack batteries and ternary 18650 batteries. How about ternary lithium-ion batteries? The following describes its performance characteristics from the aspects of ternary battery materials, voltage, and energy density.

performance of the ternary lithium-ion battery

Manufacturing materials for ternary lithium-ion batteries

Ternary materials refer to nickel, cobalt, lithium manganate, Li(NiCoMn)O2, ternary composite positive material precursor battery products, which are made of nickel salt, cobalt salt, and manganese salt. The content ratio of nickel, cobalt, and manganese can be Adjust according to actual needs. The battery with ternary material as the positive electrode is safer than lithium cobalt oxide battery. Both lithium cobalt oxide and ternary material are good lithium battery cathode materials, but their chemical properties are different. Different chemical properties have different application fields.

Compared with lithium cobalt oxide, ternary materials have the following significant advantages:

Low cost: Because it does not contain cobalt, the cost is only 1/4 of that of lithium cobalt oxide batteries and is more environmentally friendly.
Good safety: The safe working temperature can reach 170℃, while the lithium cobalt oxide is only 130℃, which greatly improves the safety of the battery and benefits the personal safety of consumers.
High gram capacity: When the charging voltage is 4.6V (the charging limit voltage of lithium cobalt oxide is 4.2V), its gram capacity can be up to 210mAh/g, when the charging voltage is 4.8V, its gram capacity can be up to 245mAh/g, Equivalent to 1.7 times of lithium cobalt oxide.
Long service life: Compared with lithium cobalt oxide batteries, the cycle life of ternary batteries is extended by 45%.

The nickel-cobalt-manganese ternary material seems to be a bit of the meaning of lithium nickelate mixed with lithium cobaltate mixed with lithium manganate. Although this understanding is incorrect, it is not unreasonable to understand from the performance of the ternary material:

1. Compared with lithium nickelate, the energy density of ternary materials is lacking, but the stability is greatly improved.

2. Compared with lithium cobalt oxide, the platform of the ternary material is slightly lower, and the maturity of the material is somewhat different, but the safety and cycling are higher, especially the feasibility of high charging voltage is higher.

3. Compared with lithium manganate, the safety performance of ternary materials is much lower, but the high temperature performance and energy density have great advantages.

Energy density and voltage of ternary battery:

The current voltage and energy density of the ternary battery can reach (145mAh/g, 2.8~4.2V, 1C), and the cycle life (500~800 times, 1C).

The industry generally believes that the specific energy of power ternary batteries can reach 300wh/kg in 2020. The consensus on the technical route is to match the high nickel ternary anode with silicon carbon anode. A substantial breakthrough has been made. The mid-term goal is based on lithium-rich manganese-based/high-capacity silicon-carbon negative electrodes, achieving a monomer exceeding 350wh/kg.

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