Boehmite for lithium battery separator coating

At this stage, alumina is more widely used in separators, but compared with alumina, boehmite has greater development potential in the field of lithium batteries in the future. Boehmite for lithium battery separator coating has the following advantages:

(1) Low hardness, in the process of cutting and coating, the mechanical wear is small, which can reduce the risk of equipment wear and foreign matter introduction;

(2) High heat-resistant temperature and good compatibility with organic substances;

(3) The density is small, and the same quality of AlOOH coats 25% more area than high-purity Al2O3;

(4) The coating has high flatness and low internal resistance;

(5) Low energy consumption, and the production process is more environmentally friendly;

(6) The preparation process is simpler and the production cost is low.

Under the trend that power batteries pay more attention to safety performance, boehmite for lithium battery separator coating material solution can highlight its advantages.

(1) The content of high-purity boehmite magnetic foreign matter is lower, which can effectively prevent leakage and short circuit, greatly improve the active safety performance of the battery, and at the same time, it can bring a significant increase in the yield rate to battery cell companies;

(2) The water absorption rate of boehmite is significantly lower than that of traditional coating materials, which is beneficial to the moisture control of high-nickel batteries and further improves the safety performance of batteries;

(3) The replacement of boehmite materials has no obvious threshold for the replacement of equipment and processes for diaphragm companies and battery companies. In addition to the low hardness of the material, the damage to the equipment (roller, cutter) is small, and it also Reduce the risk of foreign matter in the production process.