Recently, there has been a wave of rises in the middle reaches of lithium batteries, and the high-nickel Sanyuan sector has seen the largest increase. To increase energy density, it is undoubtedly that the high-nickelization of batteries is the trend. However, unlike the market, in addition to the positive electrode, The value of the electrolyte and the added value of the electrolyte after the high-nickelization of the battery will also be greatly improved. It may even be no less than the change of the positive electrode from 523 to 811. It should be emphasized!
The high nickel content of the battery brings a huge challenge to the electrolyte.
The high-nickel ternary anode has strong water absorption and low stability. Under high temperature conditions, the catalytic action of nickel accelerates the decomposition of the electrolyte, oxidizes the electrolyte, produces gas, and causes cracks in the pole piece and the dissolution of manganese and cobalt. Metal ions can also damage the SEI film on the negative electrode, causing the battery capacity, cycling, and safety to be severely affected under high temperature conditions.
The most important thing in the high-nickel age is the additives, and the new state is temporarily leading.
In the three major components of the electrolyte, the lithium salt and the solvent do not change much. The key to improving the performance still lies in the additive. In the high nickel age, the reactivity of the electrolyte at the electrode surface is reduced, and the interface compatibility needs to be improved. be resolved by special additives.
In recent years, Lifsi, DTD, RPS and its own additives in the electrolyte plant have emerged continuously. For example, New Choubang has developed a LDY196 type positive film-forming additive that can suppress the decomposition of the electrolyte on the positive electrode and the dissolution of metal ions such as manganese and cobalt. , Also with a negative film, can improve high temperature storage and cycle performance, and developed two high-nickel electrolytes, respectively, for cylindrical and soft bag / square battery, wherein the cylinder electrolyte circulation capacity after 1000 weeks Still more than 80%.
The amount of value is significantly higher than the normal electrolyte, which brings profitability.
After the age of high nickel, the profitability of the electrolyte link may not be less than the positive. At the end of last year, the ordinary lithium iron phosphate battery electrolyte 3-4 million per ton, 523 three yuan power battery electrolyte 5-6 million per Tons, 622 yuan power battery electrolyte 6-8 million yuan per ton, 811 electrolyte prices will only be higher. Leading companies in high-nickel electrolytes, profitability upward flexibility is greater. Subsidy standard switch after 6 months , The upgrade to higher energy density is overwhelming.
