A kind of production method of negative electrode material of power type lithium ion battery
A technology of lithium ion battery and negative electrode material, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of poor environmental versatility, short service life, long charging time, etc., to reduce surface oxidation, improve performance stability, improve The effect of reaction speed
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Embodiment 1
[0027] Weigh 200 kg of raw material A, pulverize, classify and adjust to a fine powder with a median particle size of 13 μm.
[0028] CS 2 Add 10g of raw material B into the liquid and stir to dissolve, then add 1000g of raw material A micropowder, stir evenly, heat to 70°C, and evaporate to dryness.
[0029] Add 80 g of raw material D to an appropriate amount of 70% ethanol solution, and after ultrasonically stirring evenly, add 8 g of raw material C, stir to form a uniform suspension, then filter and evaporate to dryness.
[0030] Weigh 1000g of the A+B mixture, add 80g of the C+D mixture, heat and mix and modify at 300-400°C after mixing, then carbonize at 1400°C, and finally graphitize at 3000°C.
[0031] A LIR2430 type button battery was used for the test, and the discharge capacity of the obtained negative electrode material was 350.2mAh / g, and the discharge efficiency was 94.6%, as shown in Table 1.
Embodiment 2
[0033] Weigh 200 kg of raw material A, pulverize, classify and adjust to a fine powder with a median particle size of 11 μm.
[0034] CS 2 Add 5g of raw material B into the liquid and stir to dissolve, then add 1000g of raw material A micropowder, stir evenly, heat to 70°C, and evaporate to dryness.
[0035] Add 60 g of raw material D to an appropriate amount of 70% ethanol solution, and after ultrasonic stirring, add 20 g of raw material C, stir to form a uniform suspension, then filter and evaporate to dryness.
[0036] Weigh 1000g of the A+B mixture, add 20g of the C+D mixture, heat and mix and modify at 300-400°C after mixing, and then graphitize at 3100°C.
[0037] A LIR2430 type button battery was used for the test, and the discharge capacity of the obtained negative electrode material was 351.8mAh / g, and the discharge efficiency was 94.1%, as shown in Table 1.
Embodiment 3
[0039] Weigh 200 kg of raw material A, pulverize, classify and adjust to a fine powder with a median particle size of 14 μm.
[0040] CS 2 Add 8g of raw material B to the liquid and stir to dissolve, then add 1000g of raw material A micropowder, stir evenly, heat to 70°C, and evaporate to dryness.
[0041] Add 50 g of raw material D to an appropriate amount of 70% ethanol solution, and after ultrasonically stirring evenly, add 30 g of raw material C, stir to form a uniform suspension, then filter and evaporate to dryness.
[0042] Weigh 1000g of the A+B mixture, add 30g of the C+D mixture, heat and mix and modify at 300-400°C after mixing, then carbonize at 1300°C, and finally graphitize at 2800°C.
[0043] A LIR2430 type button battery was used for the test, and the discharge capacity of the obtained negative electrode material was 351.6mAh / g, and the discharge efficiency was 94.3%, as shown in Table 1.
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