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Raw material composition capable of being used for preparing mesocarbon microbeads (MCMB), preparation method thereof and preparation method of MCMB anode material

A technology of mesophase carbon microspheres and raw material composition, which is applied in the fields of carbon preparation/purification, battery electrodes, electrical components, etc., can solve the problems of complicated and tedious processes, reduce the yield of microspheres, etc., and achieves simple production process steps, Reduced process cost and low reaction temperature

Active Publication Date: 2013-02-27
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The emulsion method can better control the shape and particle size of the microspheres, but the process is complicated and cumbersome, and the product separation involves the demulsification process, which reduces the yield of the microspheres to a certain extent

Method used

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  • Raw material composition capable of being used for preparing mesocarbon microbeads (MCMB), preparation method thereof and preparation method of MCMB anode material
  • Raw material composition capable of being used for preparing mesocarbon microbeads (MCMB), preparation method thereof and preparation method of MCMB anode material

Examples

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Effect test

Embodiment 1

[0027] A raw material composition that can be used for pyrolysis to prepare mesophase carbon microspheres, the raw material composition is a suspension formed after the coal tar pitch extract is dispersed in simethicone oil, and the quality of the simethicone oil is the same as the coal tar pitch extract 3 times the amount of the substance; the coal tar pitch extract is the insoluble matter obtained after the coal tar pitch powder is dissolved in n-hexane to remove impurities.

[0028] The above-mentioned raw material composition of the present embodiment is mainly prepared by the following steps (for the process flow chart, see figure 1 ):

[0029] (1) Take high-temperature coal tar pitch and grind it into coal tar pitch powder, and pass through a 250-mesh sieve;

[0030] (2) Put the above-mentioned coal tar pitch powder into a Soxhlet extractor, and then use n-hexane as an organic solvent to extract n-hexane insoluble matter from the high-temperature coal tar pitch powder u...

Embodiment 2

[0038] A raw material composition that can be used for pyrolysis to prepare mesophase carbon microspheres, the raw material composition is a suspension formed after the coal tar pitch extract is dispersed in simethicone oil, and the quality of the simethicone oil is the same as the coal tar pitch extract 3 times the amount of the substance; the coal tar pitch extract is the insoluble matter obtained after the coal tar pitch powder is dissolved in toluene to remove impurities.

[0039] The above-mentioned raw material composition of the present embodiment mainly adopts the following steps to prepare (technical process and figure 1 similar):

[0040] (1) Take medium-temperature coal tar pitch and grind it into coal tar pitch powder, and pass through a 300-mesh sieve;

[0041](2) Put the above-mentioned coal tar pitch powder into a Soxhlet extractor, and then use toluene as an organic solvent to extract toluene-insoluble matter from medium-temperature coal tar pitch powder using...

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Abstract

The invention discloses a raw material composition capable of being used for preparing MCMB. The composition is a suspension formed by coal tar pitch extracts after dispersed on dimethicone, and the coal tar pitch extracts are insoluble substances obtained by coal tar pitch powder after dissolution and impurity removal by n-hexane or toluene. The preparation method of the raw material composition includes filling the coal tar pitch powder into a Soxhlet extractor, performing repeated extracting, dissolving and impurity removing to obtain the insoluble substances through n-hexane or toluene; and then drying and grinding, and subjecting the substances to ultrasonic dispersion on the dimethicone. The method for preparing the MCMB anode material through the raw material composition includes heating the raw material composition to subject the material to a thermal condensation reaction to form micron-sized spherulite; and then subjecting the solid-liquid mixed phase after the thermal condensation to centrifugation, n-hexane extraction, repeated scrubbing and drying sequentially to obtain the MCMB anode material. The material and the methods are simple in process steps, low in cost and capable of being used for preparing high-quality MCMB.

Description

Technical field [0001] The present invention is a high -molecular compound preparation technology field, which specializes in the preparation raw materials and preparation processes of lithium battery negative electrode in the middle of the carbon micro -ball. Background technique [0002] The structure of Mesocarbon Microbeads (MCMB) is the LCD sphere formed by the accumulation of thick rings aromatous hydrocarbons. It is very suitable for lithium ion embedding and escape. ThereforeIt is considered to be a lithium secondary battery negative material with development potential. [0003] At present, most of the industrial production in the middle of the carbon micro -ball adopts the direct thermal reducing method.Although this method is simple, because the raw material coal asphalt is a multi -phase material that contains more than 5,000 aromatic hydrocarbons compounds, the influence of each component is very complicated to the impact of MCMB nuclear nuclear, growing up, and mergi...

Claims

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Application Information

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IPC IPC(8): C01B31/02H01M4/583C01B32/05
CPCY02E60/12Y02E60/10
Inventor 刘鹏刘其城李春艳李灵均熊子佳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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