A method for continuous production of lithium battery silicon carbon negative electrode material
A negative electrode material, lithium battery technology, applied in the direction of battery electrodes, electrochemical generators, nanotechnology for materials and surface science, etc., can solve the complex preparation process and affect the development and application of silicon carbon negative electrode materials, etc., to avoid Severe agglomeration, best economic advantages and application prospects, and the effect of improving sintering efficiency
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Embodiment 1
[0033] (1) First add nano-silica powder to excess hydroxy silicone oil, filter and dry after ultrasonic vibration, and obtain hydroxy-modified nano-silicon; then add excess 98wt% concentrated sulfuric acid to the cellulose fiber for soaking treatment, filter and dry, and then soak the soaked Fiber and hydroxyl-modified nano-silicon are added to deionized water and mechanically stirred to mix evenly. After standing still, a small amount of SBR emulsion with a solid content of 48% is added, and finally the solvent is evaporated by rotary evaporation until a viscous paste is obtained; the frequency of ultrasonic vibration is 50kHz , the time is 36min; the diameter of the cellulose fiber is 70nm, and the aspect ratio is 25; the time of soaking in concentrated sulfuric acid is 35min; the rotating speed of mechanical stirring is 260r / min, and the time is 34min; the time of standing still is 6h;
[0034] The ratio of each raw material is, by weight, 13 parts by weight of nano silicon ...
Embodiment 2
[0039] (1) First add nano-silica powder to excess hydroxy silicone oil, filter and dry after ultrasonic vibration, and obtain hydroxy-modified nano-silicon; then add excess 98wt% concentrated sulfuric acid to the cellulose fiber for soaking treatment, filter and dry, and then soak the soaked Fiber and hydroxyl-modified nano-silicon are added to deionized water and mechanically stirred to mix evenly. After static treatment, a small amount of SBR emulsion with a solid content of 46% is added, and finally the solvent is evaporated by rotary evaporation until a viscous paste is obtained; the frequency of ultrasonic vibration is 45kHz , the time is 38min; the diameter of the cellulose fiber is 60nm, and the aspect ratio is 10; the time of soaking in concentrated sulfuric acid is 32min; the rotating speed of mechanical stirring is 220r / min, and the time is 38min; the time of standing still is 5h;
[0040] The ratio of each raw material is, in parts by weight, 12 parts by weight of na...
Embodiment 3
[0045] (1) First add nano-silica powder to excess hydroxy silicone oil, filter and dry after ultrasonic vibration, and obtain hydroxy-modified nano-silicon; then add excess 98wt% concentrated sulfuric acid to the cellulose fiber for soaking treatment, filter and dry, and then soak the soaked Fiber and hydroxyl-modified nano-silicon are added to deionized water and mechanically stirred and mixed evenly. After standing still, a small amount of SBR emulsion with a solid content of 52% is added, and finally the solvent is evaporated by rotary evaporation until a viscous paste is obtained; the frequency of ultrasonic vibration is 55kHz , the time is 32min; the diameter of the cellulose fiber is 90nm, and the aspect ratio is 40; the time of soaking in concentrated sulfuric acid is 38min; the rotating speed of mechanical stirring is 280r / min, and the time is 33min; the time of standing still is 7h;
[0046] The ratio of each raw material is, in parts by weight, 14 parts by weight of n...
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