Drying method and production method of positive electrode material

• Main Authors: HE CHONG, DAI CHENGZHI, YUAN HAITAO, LIU YU, HUANG DIANHUA
• Format: Patent
• Language: Chinese; English
• Published: 09.04.2024
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; DRYING; DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM; ELECTRICITY; HEATING; LIGHTING; MECHANICAL ENGINEERING; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; WEAPONS

The invention discloses the technical field of preparation of positive electrode materials. The invention discloses a drying method and a production method of a positive electrode material. The drying method of the positive electrode material comprises the following steps of: quickly heating: quickly raising the temperature of the water-containing ternary positive electrode material to 100-110 DEG C; slowly raising the temperature: slowly raising the temperature of the ternary positive electrode material to 118-122 DEG C, and then adjusting the vacuum degree to-50 kPa to-80 kPa; pressure relief vacuum circulation: 5-7 times of pressure relief vacuum operation are carried out, the time for each time is 10-12 min, and the mode of each time of pressure relief vacuum operation is that nitrogen is introduced to adjust the vacuum degree to-22 kPa to-18 kPa, the duration time is 1-6 min, then nitrogen introduction is stopped, and the power of a vacuum pump is increased to enable the vacuum degree to be-50 kPa to-80