Preparation method of synthetic graphite and application thereof

A technology of artificial graphite and graphitization treatment, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of difficult to meet the application requirements of lithium-ion batteries, high production costs and energy consumption, cumbersome preparation process, etc., and achieve compatibility effects Good, cost saving, simple process effect

Active Publication Date: 2013-11-06
SHANDONG CHENYANG NEW CARBON MATERIALS +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] Chinese patent CN1331253C discloses a manufacturing method of lithium-ion battery anode material, which mixes graphite, coating material and solvent to prepare artificial graphite through the steps of desolventization, microencapsulation of coating layer, carbonization and graphitization. The preparation process of the method is loaded down with trivial details, and production cost and energy consumption are all higher
Chinese patent application CN101816084A discloses a kind of artificial graphite for negative electrode of lithium ion secondary battery, which improves the conditions of graphitization treatment by X-ray diffraction method to obtain the described artificial graphite, but the artificial graphite obtained by this method is difficult to achieve lithium ion The application requirements of the battery, and the process is not stable

Method used

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  • Preparation method of synthetic graphite and application thereof

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Embodiment 1

[0020] Embodiment 1 The preparation method of artificial graphite of the present invention

[0021] Using asphalt as raw material, put the asphalt into the reactor, control the temperature at 350°C and polymerize at a stirring rate of 1000r / min for 24 hours to obtain mesophase pitch, and the polymerization pressure is 4.5Mpa; carbonize the mesophase pitch at 600°C Treatment: the carbonized mesophase pitch is subjected to graphitization treatment at 3000° C. for 3 hours to obtain the artificial graphite of the present invention.

Embodiment 2

[0022] The preparation method of embodiment 2 artificial graphite of the present invention

[0023] Using asphalt as raw material, put the asphalt into the reactor, control the temperature at 380°C and polymerize at a stirring rate of 600r / min for 20 hours to obtain mesophase pitch, and the polymerization pressure is 3Mpa; carbonize the mesophase pitch at 700°C ; The carbonized mesophase pitch is graphitized at 2900° C. for 3 hours to obtain the artificial graphite of the present invention.

Embodiment 3

[0024] The preparation method of embodiment 3 artificial graphite of the present invention

[0025] Using asphalt as raw material, put the asphalt into the reactor, control the temperature at 400°C and polymerize at a stirring rate of 700r / min for 17 hours to obtain mesophase pitch, and the polymerization pressure is 3Mpa; carbonize the mesophase pitch at 900°C ; The artificial graphite of the present invention can be obtained by graphitizing the carbonized mesophase pitch at 2850°C.

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Abstract

The invention claims a method for preparing artificial graphite and its application, belonging to the field of lithium batteries. The preparation method of the artificial graphite uses pitch as a raw material, and only needs polymerization, carbonization, and graphitization to prepare artificial graphite with excellent performance; it can be used alone or mixed with natural carbon materials to prepare negative electrode materials for lithium electronic batteries. The preparation method of the artificial graphite of the present invention has the advantages of simple process, low energy consumption and low production cost, and the lithium electronic battery negative electrode material prepared by using it has high initial efficiency and initial capacity, and low electrode expansion coefficient, so the present invention is very suitable for industrial production , has broad application value.

Description

technical field [0001] The invention relates to a method for preparing artificial graphite and its application, in particular to a method for preparing artificial graphite using pitch as raw material and its application for preparing negative electrode materials for lithium-ion batteries. Background technique [0002] Lithium-ion batteries have outstanding advantages such as high working voltage, large specific energy, stable discharge potential curve, small self-discharge, long cycle life, good low-temperature performance, no memory, and no pollution. They are widely used in mobile communications, notebook computers, video cameras, etc. Small electronic devices such as all-in-one computers are also ideal power supplies for future electric vehicles. The key to the successful application of lithium-ion batteries lies in the preparation of negative electrode materials that can reversibly intercalate and deintercalate lithium ions. Although a variety of anode materials for lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/583
CPCY02E60/10
Inventor 闫桂林刘春龙韩波刘越
Owner SHANDONG CHENYANG NEW CARBON MATERIALS
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