Although the low alkali PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC is not washed after iron removal, the discharge specific capacity of the final ternary cathode material is slightly worse than that of the ternary cathode material after complete washing under the premise of meeting the use requirements, but the discharge efficiency and cycle retention rate are significantly improved. Due to the reduction of the amount of washing, the manufacturing cycle of the material can be shortened and the production cost can be reduced, which can bring more significant economic benefits for the currently developed and mature lithium material preparation process.
According to the ratio of metal content in the precursor to lithium molar mass 1:1.01~1.08, the precursor is mixed with lithium hydroxide, and then sintered at 700~830℃ (for example, 700℃, 750℃, 800℃ or 830℃) and oxygen atmosphere to obtain high alkali material. In order to facilitate the coating with low alkali MATERIAL after subsequent washing and ensure that more alkali is washed away as much as possible in the subsequent washing process, the high alkali material is crushed to an average particle size of 4~13μm, and then the iron is removed by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC to obtain the high alkali material fine material.
The high-alkali and fine materials are washed, filtered and dried to obtain the washed materials. According to the ratio of metal content in the precursor to lithium molar mass 1:0.85~1.00, the precursor and lithium hydroxide are mixed evenly, and then sintered at 730~850℃ (such as 730℃, 780℃, 800℃ or 850℃) and oxygen atmosphere to obtain the low alkali material. Removal of iron by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC.
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