High interlayer spacing artificial graphite material and preparation method thereof

An artificial graphite and spacing technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as limiting the application field and application effect of high-level spacing graphite materials, irregular interlayer structure, and acidic pH value. , to achieve the effect of mild processing technology, good electrical conductivity and high layer spacing

Active Publication Date: 2018-11-20
贵州中科星城石墨有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The traditional high-layer spacing graphite material is a worm-like substance obtained from flake natural graphite as raw material through oxidation intercalation, washing, drying, and thermal expansion. During the preparation process, the material has many characteristics of flake natural graphite. Obvious destructive effects, such as significantly reduced electrical conductivity of the material, extremely irregular interlayer structure, acidic PH value, etc., these destructive effects greatly limit the application field and application effect of high-layer spacing graphite materials
In addition, this traditional preparation method uses a large amount of concentrated acid, and the preparation process has a high degree of pollution

Method used

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  • High interlayer spacing artificial graphite material and preparation method thereof
  • High interlayer spacing artificial graphite material and preparation method thereof
  • High interlayer spacing artificial graphite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of 1# high-rise spacing artificial graphite material, the steps are as follows:

[0029] (I) Petroleum asphalt and biomass tar with a softening point of 90°C and D50=3.4 μm are used as raw materials, in which aromatic hydrocarbons in biomass tar account for 21%, phenols account for 45%, and the quality of asphalt and biomass tar The ratio is 5:1. Under the conditions of nitrogen atmosphere, 300rpm mechanical stirring, 400°C, 5atm, polycondensation and crosslinking were carried out for 12h to obtain crosslinked mesophase pitch.

[0030] (II) The cross-linked mesophase pitch was treated in a nitrogen atmosphere at a low temperature of 600°C for 5 hours, and the temperature was naturally cooled to room temperature to obtain green coke, which was then depolymerized by a multi-wheel mill.

[0031] (Ⅲ) The depolymerized green coke was heated up to 2600°C under a nitrogen atmosphere, kept for 1 hour to graphitize, and a high-layer spacing artificial gra...

Embodiment 2

[0033] The preparation method of 2# high-rise spacing artificial graphite material, the steps are as follows:

[0034] (I) Coal tar pitch and biomass tar with a softening point of 130°C and D50 = 4.1 μm are used as raw materials, in which aromatic hydrocarbons in biomass tar account for 32%, phenols account for 40%, and the quality of pitch and biomass tar The ratio is 10:3. Under the conditions of argon atmosphere, 300rpm mechanical stirring, 450°C and 16atm, polycondensation and crosslinking were carried out for 36h to obtain crosslinked mesophase pitch.

[0035] (II) The cross-linked mesophase pitch was treated in an argon atmosphere at a low temperature of 600°C for 3 hours, and the temperature was naturally cooled to room temperature to obtain green coke, which was then depolymerized by multiple round mills.

[0036] (Ⅲ) The depolymerized green coke was heated up to 3000°C in an argon atmosphere, kept for 2 hours for graphitization, and a high-layer spacing artificial gr...

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Abstract

The invention provides a high interlayer spacing artificial graphite material and a preparation method thereof. The material is artificial graphite prepared from asphalt as a raw material through crosslinking, polycondensation and graphitization treatment, has an obvious layered structure, has an interlayer spacing of 0.34-0.38 nm, and has high electrical conductivity. The preparation method of the high interlayer spacing artificial graphite material provided by the invention comprises the following steps: taking asphalt as a raw material, adding a proper amount of crosslinking agent, carryingout polycondensation and crosslinking reaction under a high-temperature and high-pressure condition to obtain crosslinked mesophase asphalt, and then carrying out low-temperature treatment and graphitization to obtain the high interlayer spacing artificial graphite material.

Description

technical field [0001] The invention relates to a graphite material and a preparation method thereof, in particular to a high-layer spacing artificial graphite material and a preparation method thereof. Background technique [0002] High-layer spacing graphite material is a kind of functional carbon material widely used. It has the characteristics of high temperature resistance, corrosion resistance, electrical conductivity, softness and impermeability. It is widely used in petrochemical, sealing, energy storage and energy saving fields. play an important role. [0003] The traditional high-layer spacing graphite material is a worm-like substance obtained from flake natural graphite as raw material through oxidation intercalation, washing, drying, and thermal expansion. During the preparation process, the material has many characteristics of flake natural graphite. Obvious destructive effects, such as significantly reduced electrical conductivity of the material, extremely ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/205
CPCC01B32/205
Inventor 石磊王志勇陶振友邵浩明
Owner 贵州中科星城石墨有限公司
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