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Preparation method of carbon electrode material and carbon electrode material

A carbon electrode and spinning technology, which is applied to the preparation of carbon electrode materials and the field of carbon electrode materials, can solve the problems of unsatisfactory fast charging performance, unfavorable industrial production, and difficulty in intercalation of sodium ions, and achieves excellent initial charging capacity and deintercalation. The effect of stable capacity and high sodium ion intercalation

Pending Publication Date: 2022-03-01
NINGBO SHANSHAN NEW MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problems of insufficient lithium intercalation rate, difficult intercalation of sodium ions, unsatisfactory fast charging performance, complex production process, and unfavorable industrial production of carbon electrode materials in the prior art, and provides a carbon electrode Preparation method of material and carbon electrode material prepared therefrom

Method used

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  • Preparation method of carbon electrode material and carbon electrode material
  • Preparation method of carbon electrode material and carbon electrode material
  • Preparation method of carbon electrode material and carbon electrode material

Examples

Experimental program
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Effect test

Embodiment 1

[0075] ① Spinning and curing to prepare fiber raw materials

[0076] The commercially available petroleum pitch with a softening point of 270°C was used as the precursor, and no other ingredients were added. The asphalt was heated to 320°C to melt, and was continuously spun by means of melt pump extrusion. The spinneret single plate was arranged in a single row with 200 holes, made of 304 stainless steel, the hole diameter was 100 μm, and the propulsion rate was 600mL / h. The diameter of the obtained fiber is 18 μm, and it is a continuous cylindrical fiber, and the fiber is straight and has no crimp. The obtained fiber is cured in a curing bath, the curing bath is hot air, and the hot air flow rate is 0.1m 3 / Kg, through 5 temperature zones of 280°C, 300°C, 320°C, 340°C, and 370°C, each temperature zone is 1.2 meters, the residence time is 0.6 hours, and the total residence time of the curing bath is 3 hours. After passing through the curing bath, the asphalt continuous fiber...

Embodiment 2

[0080] Using commercially available petroleum asphalt with a softening point of 270°C, adding a single-walled carbon nanotube-nitrogen methyl pyrrolidone dispersion with a content of 0.4wt% as a precursor , and then heated to 320°C and homogenized at high speed for 30 minutes with a homogenizer as a spinning solution. Others are carried out according to the method of Example 1.

[0081] It can be seen from the XRD pattern that the obtained carbon electrode material is amorphous carbon.

Embodiment 3

[0083] ① Spinning and curing to prepare fiber raw materials

[0084] The commercially available petroleum pitch with a softening point of 270°C was used as the precursor, and no other ingredients were added. The asphalt was heated to 320°C to melt, and was continuously spun by means of melt pump extrusion. The spinneret single plate was arranged in a single row with 200 holes, made of 304 stainless steel, the hole diameter was 100 μm, and the propulsion rate was 400mL / h. The diameter of the obtained fiber was 18 μm, and it was a continuous cylindrical straight fiber. The obtained fiber is cured in a curing bath, the curing bath is hot air, and the hot air flow rate is 0.1m 3 / Kg, through 5 temperature zones of 280°C, 300°C, 330°C, 350°C, and 370°C, each temperature zone is 1.2 meters, the residence time is 0.75 hours, and the total residence time of the curing bath is 3.75 hours. After passing through the curing bath, the pitch continuous fibers prepared by spinning and curi...

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Abstract

The invention relates to a preparation method of a carbon electrode material and the carbon electrode material. The preparation method of the carbon electrode material comprises the following steps: carbonizing pitch fibers, resin fibers or pitch resin composite fibers obtained by spinning and curing to obtain the carbon electrode material, and the carbon electrode material is amorphous carbon. The lithium ion battery has excellent first charge capacity and rapid discharge constant current ratio, excellent lithium ion and sodium ion rapid intercalation and deintercalation capability and excellent cycle capability.

Description

technical field [0001] The invention relates to a preparation method of a carbon electrode material and the carbon electrode material. Background technique [0002] Compared with other secondary batteries, lithium-ion batteries not only have high energy density, high working voltage, and long cycle life, but also have unique advantages such as good safety performance, environmental protection, and no pollution. Therefore, lithium batteries are widely used in various mobile and stationary energy components. Mainstream lithium-ion batteries usually use graphite materials as negative electrodes, but the crystalline structure of graphite materials determines that lithium-ion batteries cannot perform fast lithium ion intercalation, nor can they meet the needs of lithium ion intercalation and migration at low temperatures. To increase the intercalation and migration speed of lithium ions in the carbon negative electrode material, the method of disordering the carbon negative elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/583H01G11/40H01G11/86H01M10/0525H01M10/054
CPCH01M4/583H01G11/40H01G11/86H01M10/0525H01M10/054Y02E60/10
Inventor 潘福森张秀云李虹王旭峰
Owner NINGBO SHANSHAN NEW MATERIAL TECH
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