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Granulation method and granulation material of artificial graphite, artificial graphite, preparation method and application of artificial graphite, and secondary battery

An artificial graphite, secondary battery technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of large equipment loss, high energy consumption, low production capacity, etc., and achieve the goal of increasing production capacity, low energy consumption and reducing production costs. Effect

Pending Publication Date: 2022-06-24
上海杉杉新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problems of high energy consumption, large equipment loss and low production capacity of the existing artificial graphite preparation method using drum furnace granulation, and to provide a granulation method for artificial graphite And granulated material, artificial graphite and its preparation method and application, secondary battery

Method used

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  • Granulation method and granulation material of artificial graphite, artificial graphite, preparation method and application of artificial graphite, and secondary battery
  • Granulation method and granulation material of artificial graphite, artificial graphite, preparation method and application of artificial graphite, and secondary battery
  • Granulation method and granulation material of artificial graphite, artificial graphite, preparation method and application of artificial graphite, and secondary battery

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Embodiment 1

[0032] (1), granulation

[0033] In the pulverizing equipment, the calcined needle coke is pulverized and spheroidized to obtain powder, and the median particle size is D. 50 Controlled at 8μm. The obtained powder and asphalt (binder) are mixed in a ratio of 100:16, and the mixture is mixed for 100 minutes, so that the needle coke and the asphalt are evenly mixed. The mixture is then placed in a drum furnace, granulated under nitrogen protection, the granulation temperature is 300°C, the granulation time is 5h, and the drum furnace speed is 8r / min to obtain artificial graphite granules.

[0034] (2), carbonization

[0035] The obtained artificial graphite granules were placed in a roller kiln, and under nitrogen protection, the temperature was raised to 1250°C at a heating rate of 2.28°C / min, and the temperature was kept for 23h for carbonization treatment.

[0036] (3), graphitization

[0037] The carbonized material was graphitized in an Acheson furnace at 3000°C for 72 ...

Embodiment 2

[0039] Except that the granulation temperature is 350°C, other operations are carried out as in Example 1.

[0040] Figure 1-3 The SEM images of the obtained artificial graphite are magnified 500 times, 1000 times and 3000 times in turn. It can be seen from the figure that the artificial graphite particles prepared by this process form a dense layered bonding morphology, and achieve a morphology and structure similar to the original process.

Embodiment 3

[0042] Except that the granulation temperature is 400°C, other operations are carried out as in Example 1.

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Abstract

The invention discloses an artificial graphite granulation method, a granulation material, artificial graphite, a preparation method and application, and a secondary battery. The granulation method of the artificial graphite comprises the following steps: in a drum furnace, granulating a mixture containing a binder and a crushed and spheroidized artificial graphite raw material at 300-400 DEG C to obtain an artificial graphite granulation material. The preparation method of the artificial graphite comprises the following steps: carbonizing the artificial graphite granulation material, and graphitizing to obtain the artificial graphite. According to the granulation method, low energy consumption and low equipment loss are achieved, and the excellent effect that the granulation capacity of the drum furnace is remarkably improved by about 30% or above can be achieved. Moreover, the artificial graphite obtained by the preparation method also has excellent electrochemical performance, can be widely applied to the 3C field, improves the capacity of large-scale industrial production, greatly reduces the production cost, and realizes higher economic benefits.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a granulation method and granulation material of artificial graphite, artificial graphite, a preparation method and application thereof, and a secondary battery. Background technique [0002] Artificial graphite is widely used in automotive power batteries and mid-to-high-end electronic products due to its excellent cycle performance, high-rate charge-discharge efficiency, and electrolyte compatibility. In recent years, with the continuous improvement of battery life requirements in the field of automotive power batteries and mid-to-high-end electronic products, as well as the rapid development of the lithium battery industry, the demand for high-capacity artificial graphite anode materials has increased rapidly. hot spot. [0003] The granulation process is one of the key process steps in the manufacture of artificial graphite, and its production capacity is one of the impo...

Claims

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Application Information

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IPC IPC(8): B01J2/12B01J2/28C10B55/02C10B57/00C10B57/04H01M4/133H01M4/583H01M10/0525
CPCB01J2/12B01J2/28H01M4/583H01M4/133H01M10/0525C10B57/045C10B57/00C10B55/02H01M2004/027
Inventor 钱佳丽顾凯唐卓伦李虹王旭峰娄文君
Owner 上海杉杉新材料有限公司