Production method of high-compaction fast-charging type lithium ion battery negative electrode material
A technology for lithium-ion batteries and anode materials, applied to battery electrodes, circuits, electrical components, etc., to achieve the effects of avoiding accumulation, increasing compaction density, and improving coating uniformity
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Embodiment 1
[0029] This embodiment provides a method for producing a negative electrode material of a high-pressure compacted and fast-charged lithium-ion battery, comprising the following steps:
[0030] (1) Coarsely pulverize and finely pulverize petroleum coke raw materials, and then perform spheroidization, shaping and classification to obtain graphite raw material powder with D50 particle size value of 6 μm;
[0031] (2) Mix the raw material powder obtained in step (1) with the petroleum asphalt binder according to the ratio of 95:5, and the mixing time is 2 hours to obtain the mixture 1,
[0032] (3) The mixed powder 1 obtained in step (2) was chemically modified in a coating kettle under the protection of inert gas nitrogen. The modification temperature was 550°C, and the treatment time was 10 hours. The D50 particle size value was 16 μm. secondary particles;
[0033] (4) Mix the secondary particles obtained in step (3) with the phenolic resin according to the ratio of 98:2, and t...
Embodiment 2
[0040] This embodiment provides a method for producing a negative electrode material of a high-pressure compacted and fast-charged lithium-ion battery, comprising the following steps:
[0041] (1) The needle coke raw coke is coarsely crushed and finely crushed, and then spheroidized, shaped and classified to obtain a graphite raw material powder with a D50 particle size of 8 μm;
[0042] (2) Mix the raw material powder obtained in step (1) with the petroleum asphalt binder according to the ratio of 90:10, and the mixing time is 2 hours to obtain the mixture 1,
[0043] (3) The mixed powder 1 obtained in step (2) was chemically modified in a coating kettle under the protection of inert gas nitrogen. The modification temperature was 650°C, and the treatment time was 8 hours. The D50 particle size value was 15 μm. secondary particles;
[0044] (4) Mix the secondary particles obtained in step (3) with the phenolic resin according to the ratio of 97:3, and the mixing time is 4 hou...
Embodiment 3
[0051] This embodiment provides a method for producing a negative electrode material of a high-pressure compacted and fast-charged lithium-ion battery, comprising the following steps:
[0052] (1) The calcined needle coke is coarsely crushed and finely crushed, and then spheroidized, shaped and classified to obtain graphite raw material powder with a D50 particle size of 8.5 μm;
[0053] (2) Mix the raw material powder obtained in step (1) with the petroleum asphalt binder according to the ratio of 85:15, and the mixing time is 2 hours to obtain the mixture 1,
[0054] (3) The mixed powder 1 obtained in step (2) was chemically modified in a coating kettle under the protection of inert gas nitrogen. The modification temperature was 700°C, and the treatment time was 8 hours. The D50 particle size value was 18 μm. secondary particles;
[0055] (4) Mix the secondary particles obtained in step (3) with the phenolic resin according to the ratio of 95:5, and the mixing time is 5 hours...
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