Preparation method of lithium iron phosphate positive electrode material slurry
A technology of lithium iron phosphate and positive electrode materials, which is applied in chemical instruments and methods, battery electrodes, phosphorus compounds, etc., and can solve problems such as high stirring speed requirements, large heat production, and difficulty in dispersing
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Embodiment 1
[0024] In a 50L planetary mixer, put 6 parts by weight of polyvinylidene fluoride powder into 69 parts by weight of N-methylpyrrolidone solvent, stir and wet at 15 / 300rpm for 5 minutes with revolution / autobiography, and then use revolution / autobiography Stir and disperse at 25 / 1200 rpm for 120 min, respectively, to obtain a glue solution with a solid content of 8%. Put 1 part by weight of vapor-grown carbon fiber and 3 parts by weight of conductive carbon black into the prepared glue, stir and wet at 15 / 300 rpm for revolution / autopropagation for 5 minutes, and then stir at 25 / 1400 rpm for revolution / autopropagation Disperse for 30 minutes to prepare a conductive glue with a solid content of 12%. 100 parts by weight of lithium iron phosphate powder were put into a three-axis mixer, and the prepared conductive glue was divided into two equal parts. The first part of conductive glue was added to the three-axis mixer, and the revolution / autopropagation were respectively 15 / 300rpm ...
Embodiment 2
[0026] In a planetary mixer, put 5 parts by weight of polyvinylidene fluoride powder into 45 parts by weight of N-methylpyrrolidone solvent, stir and wet at 15 / 300rpm for revolution / autopropagation for 5min, and then use revolution / autopropagation respectively Stir and disperse at 25 / 1200 rpm for 120 minutes to prepare a glue solution with a solid content of 10%. Put 3 parts by weight of conductive carbon black into the prepared glue, stir and wet at 15 / 300 rpm for revolution / autopropagation for 5 minutes, and then stir and disperse for 30 minutes at 25 / 1400 rpm for revolution / autopropagation to obtain a solid content of 15% conductive glue. Put 100 parts by weight of lithium iron phosphate powder into a three-axis mixer, and divide the prepared conductive glue into two parts. The first part of conductive glue is added to the three-axis mixer, and dispersed for 30 minutes at 15 / 400 rpm for revolution / autopropagation. Then add the second portion of conductive glue, and dispers...
Embodiment 3
[0028] In a planetary mixer, put 7 parts by weight of polyvinylidene fluoride powder into 63 parts by weight of N-methylpyrrolidone solvent, stir and wet at 15 / 300rpm for revolution / autobiography for 5min, and then use revolution / autobiography respectively Stir and disperse at 25 / 1200 rpm for 120 minutes to prepare a glue solution with a solid content of 10%. Put 5 parts by weight of conductive carbon black into the prepared glue, stir and wet at 15 / 300 rpm for revolution / autopropagation for 5 minutes, then stir and disperse at 25 / 1400 rpm for revolution / autopropagation for 30 minutes to obtain a solid content of 16% conductive glue. 100 parts by weight of lithium iron phosphate powder were put into a three-axis mixer, and the prepared conductive glue was equally divided into two parts. The first part of conductive glue was added to the three-axis mixer, and the revolution / autopropagation were respectively 15 / 500rpm and dispersed for 30 minutes. Then add the second portion of...
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