Amorphous carbon material and preparing method and application

A technology of amorphous carbon and carbon materials, applied in chemical instruments and methods, inorganic chemistry, electrode manufacturing, etc., can solve problems such as affecting the safety and service life of batteries, without considering heat transfer capacity, etc., to achieve high capacity and simple operation. , the effect of expanding the application field

Active Publication Date: 2018-09-21
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The above patent documents disclose a variety of carbon materials and their preparation methods. These preparation methods have many steps. The prepared carbon materials are mainly used to increase the battery capacity, without considering how to improve the heat transfer capacity, which will affect the battery performance. safety and service life

Method used

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  • Amorphous carbon material and preparing method and application
  • Amorphous carbon material and preparing method and application

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Embodiment 1

[0104] Mesophase pitch (98% by weight carbon content, 50% mesophase content) with a softening point of 260°C and aluminum silicate (Al 2 (SiO 3 ) 3 ) is mixed according to the mass ratio of 96:4, and the mixture is pulverized by a small ultrafine pulverizer to obtain D 50 =50μm powder, the powder is ball milled at 300rpm by an omnidirectional planetary ball mill to obtain D 50 = 10 μm powder.

[0105] Add gum arabic to water, and prepare a solution with a concentration of 2% by weight under the condition of a water bath at 80°C. Add the aforementioned ball-milled powder into the solution, the mass ratio of powder to solution is 20:100, stir at 80°C for 4 hours, then let it stand at room temperature, remove the upper liquid, and vacuum-dry the obtained solid at 120°C for 12 hours. Place the dried powder in the tube furnace part of the OTF-1200X-80-III-F3LV system, pre-fire at 600°C for 10 hours under nitrogen atmosphere, then raise the temperature to 1300°C, and fire at thi...

Embodiment 2

[0107] Mesophase pitch (99 wt% carbon content, 90% mesophase content) with a softening point of 320°C and aluminum silicate (Al 2 (SiO 3 ) 3 ) is mixed according to the mass ratio of 98:2, and the mixture is pulverized by a small ultrafine pulverizer to obtain D 50 =80μm powder, the powder is ball-milled at 300rpm by a full-range planetary ball mill to obtain D 50 = 25 μm powder.

[0108] Add gum arabic to water, and prepare a solution with a concentration of 0.01% by weight under the condition of a water bath at 80°C. Then add the ball-milled powder into the solution, the mass ratio of powder to solution is 20:100, stir at 80°C for 4 hours, then let it stand at room temperature, remove the upper liquid, and vacuum-dry the obtained solid at 120°C for 12 hours . The dried powder was placed in the tube furnace part of the OTF-1200X-80-III-F3LV system, and fired at 1600 ° C for 1 hour under a nitrogen atmosphere to obtain D 50 = 29 μm amorphous carbon material.

Embodiment 3

[0110] Petroleum pitch (carbon content 86% by weight) with a softening point of 45°C and kaolin (Al 2 o 3 2SiO2 2 2H 2 O) mix according to the mass ratio of 99:1, the mixture is pulverized by a small ultrafine pulverizer to obtain D 50 =30μm powder, the powder is ball-milled at 300rpm by a full-range planetary ball mill to obtain D 50 = 10 μm powder.

[0111] Add sodium carboxymethyl cellulose to water, and prepare a solution with a concentration of 0.1% by weight under the condition of a water bath at 80°C. Then add the aforementioned ball-milled powder into the solution, the mass ratio of the powder to the solution is 20:100, stir at room temperature for 4 hours, then stand at room temperature, remove the upper liquid, and vacuum-dry the obtained solid at 120°C for 12 hours . The dried powder was placed in the tube furnace part of the OTF-1200X-80-III-F3LV system, and fired at 900 ° C for 20 hours under a nitrogen atmosphere to obtain D 50 = 13 μm amorphous carbon mat...

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Abstract

The invention relates to the field of carbon materials, in particular to an amorphous carbon material and a preparing method and application. The amorphous carbon material is characterized in that thereal density rho of the amorphous carbon material and the interlayer spacing d002 obtained through powder XRD spectral analysis meet the relation: 100*rho*d002> / =70; the interlayer spacing d002, La and Lc meet the relation: Lc*d002 < / =0.58 and 100*(Lc / La2)*d0023< / =0.425; on the basis of the total mass of the amorphous carbon material, the amorphous carbon material contains 0.001-2% of silicon component and 0.001-2% of aluminum component. The prepared amorphous carbon material has good heat conductivity and can provide high battery capacity.

Description

technical field [0001] The invention relates to the field of carbon materials, in particular to an amorphous carbon material and its preparation method and application. Background technique [0002] In the field of secondary batteries, especially in the field of lithium-ion secondary batteries, graphite materials have become the main materials due to their high electronic conductivity, small volume change before and after layered structure, high lithium-intercalation capacity and low lithium-intercalation potential. Commercial Li-ion battery anode materials. The secondary battery can be used repeatedly, and it can be used again when the battery is fully discharged. [0003] With the development of secondary battery technology, the requirements for negative electrode materials continue to increase, and amorphous carbon materials have gradually attracted attention. Amorphous carbon materials have the advantages of large layer spacing, good compatibility with electrolyte, fas...

Claims

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Application Information

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IPC IPC(8): H01M4/139H01M4/1393H01M4/133
CPCH01M4/133H01M4/139H01M4/1393Y02E60/10C01B32/00H01M4/587H01M2004/027H01M4/386H01M4/0471H01M4/364H01M10/0525H01M2004/021
Inventor 潘广宏梁文斌唐堃田亚峻康丹苗段春婷张开周康利斌王璐璘卫昶
Owner CHNA ENERGY INVESTMENT CORP LTD
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