Amorphous carbon material, preparation method thereof and lithium ion battery
A technology of amorphous carbon and inorganic acid, applied in the field of energy storage, can solve the problems of amorphous carbon materials with electrochemical properties, and achieve the effect of improving conductivity
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Embodiment 1
[0122] This embodiment prepares amorphous carbon material according to the following method:
[0123] (1) Under the protection of nitrogen, pre-carbonize petroleum pitch at 550°C for 2.5 hours in a sintering furnace, cool to 25°C after pre-carbonization, and then ball mill and pulverize until the median particle size is about D50=10.0μm, according to a certain mass ratio (Grinding material: hydrochloric acid: deionized water = 1:0.8:8) Stir and mix for purification, the time of stirring and mixing is 2.5h, separate by suction filtration, wash the obtained solid with deionized water until neutral, dry to obtain second precursor.
[0124] (2) Put the second precursor into a tube furnace, heat up to 950°C for sintering at a rate of 10°C / min under the protection of nitrogen (purity 99.99%), keep warm for 2 hours, and naturally cool to room temperature (25°C), After taking the material, sieve it with 325 mesh to obtain the third precursor.
[0125] (3) The third precursor was hea...
Embodiment 2
[0130] This embodiment prepares amorphous carbon material according to the following method:
[0131] (1) Under the protection of argon, pre-carbonize walnut shells in a sintering furnace at 400°C for 0.5h, cool to 20°C after pre-carbonization, and then airflow crush until the median particle size is about D50=13.0μm. Ratio (crushed material: hydrochloric acid: deionized water = 1:1.2:10) was stirred and mixed for purification, the time of stirring and mixing was 2.5 hours, separated by suction filtration, and the obtained solid was washed with deionized water until neutral, dried, Obtain the second precursor.
[0132](2) The second precursor is put into a tube furnace, and under the protection of nitrogen (purity 99.99%), the temperature is raised to 1100°C at a heating rate of 10°C / min for sintering, kept for 2h, and naturally cooled to room temperature (20°C). After the material was sieved with 325 mesh, the third precursor was obtained.
[0133] (3) Add the third precurs...
Embodiment 3
[0137] This embodiment prepares amorphous carbon material according to the following method:
[0138] (1) Under the protection of argon, pre-carbonize petroleum coke at 800°C for 5 hours in a sintering furnace, cool to 30°C after pre-carbonization, and then air-flow pulverize until the median particle size is about D50=6.0μm, according to a certain mass ratio (Grinding material: hydrochloric acid: deionized water = 1:0.8:8) Stir and mix for purification, the time of stirring and mixing is 2.5h, separate by suction filtration, wash the obtained solid with deionized water until neutral, dry to obtain second precursor.
[0139] (2) Put the second precursor into a tube furnace, heat up to 1050°C at a rate of 10°C / min under the protection of nitrogen (purity 99.99%) for sintering, keep it warm for 2 hours, and naturally cool to room temperature (30°C), After taking the material, sieve it with 325 mesh to obtain the third precursor.
[0140] (3) Add 1kg of the third precursor to 2...
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