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Commercial cathode materials are prepared by continuous PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC process
Time: 2023-04-08

Remove iron from lithium iron phosphate

Preoxidation process of precursor: The preparation of commercial cathode materials generally adopts the continuous PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC process with controlled crystallization method. The spherical hydroxide is prepared first, and then the cathode material with regular morphology is sintered by mixing with lithium salt at high temperature. But the synthesis conditions are harsh, need to be calcined in oxygen atmosphere for a long time at high temperature, time-consuming energy, high cost.


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The results show that the precursor is preoxidized from hydroxide to hydroxyl oxide before calcination of mixed lithium, and the crystal morphology, particle morphology, particle size and distribution of the precursor change, which has a significant effect on the cathode material. First, light brown M(OH)2 was prepared by PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC process. Under strong alkaline conditions, it was oxidized into black MOOH by hydrogen peroxide. Then, it was mixed with lithium salt and calcined at high temperature to form positive electrode material.


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The results show that after mixing MOOH with LITHIUM salt, PTMS LITHIUM COBALT ACID MATERIAL MAGNETIC iron removal can be synthesized at low calcination temperature. At 0.1C ratio, the specific capacity of charge and discharge is 189 and 175mAh/g, respectively. After 50 cycles, The capacity retention rate is 97.7%.

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