Preparation of lithium cobalt oxide for lithium cobalt oxide battery

　　The method for preparing active lithium cobalt oxide is characterized by the following steps: using primary cobalt ore as a raw material to prepare a high-purity cobalt salt solution; under a weak oxidizing atmosphere, a high-purity cobalt salt solution with a concentration of 40~70g/1 Mix and react with precipitant with a concentration of 60~200g/1, the reaction temperature is 40~80℃, the reaction time is 5~60 minutes, the pH value after the reaction is 7.2~9.5, filtered, washed, and dried to obtain battery-grade diamond salt; In a weak oxidizing atmosphere, the battery-grade cobalt salt is calcined at 400~830℃ for 2~7 hours, and then pulverized to obtain micron or nano-sized triple diamonds; the crushed micron battery-grade lithium carbonate and micron or nano-sized triple diamonds According to the 1.00~1.04:1 molar ratio, the mixture is weighed and mixed, and then burned at 450~950℃ for 10~20 hours in a weak oxidizing atmosphere, crushed and classified to obtain the finished product. In addition to superior chemical and physical properties, the material prepared according to the invention also has excellent electrochemical properties.

　　The advantages and disadvantages of lithium cobalt oxide batteries

　　The main advantages of this cathode material are: high working voltage (average working voltage is 3.7V), stable charge and discharge voltage, suitable for high current charge and discharge, high specific energy, good cycle performance, high conductivity, simple production process and easy preparation Wait. The main disadvantages are: expensive, poor resistance to overcharge, and cycle performance needs to be further improved.