Alkali lignin-based electrostatic spinning carbon fiber and preparation method and application thereof

A lignin-based, electrospinning technology, which is applied to the chemical characteristics of fibers, circuits, electrical components, etc., can solve the problems of high cost of commercial graphite, and achieve the effect of simple and easy preparation method, low preparation cost and cheap raw materials

Inactive Publication Date: 2016-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is little research on papermaking industrial waste-poplar base lignin-based electrospun carbon materials in lithium batteries. The process of direct industrial application

Method used

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  • Alkali lignin-based electrostatic spinning carbon fiber and preparation method and application thereof
  • Alkali lignin-based electrostatic spinning carbon fiber and preparation method and application thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0024] A lignin-based nanofiber film was prepared by electrospinning with a solution of 15% N,N-dimethylformamide in 3 / 7 (w / w) polyacrylonitrile / polyacrylonitrile. Electrospinning The conditions are as follows: the static voltage is 15KV, the receiving distance is 10cm, and the advancing speed of the spinning solution is 1mL / h; the nanofiber membrane is placed in a tube furnace for pre-oxidation and carbonization, and the pre-oxidation temperature is controlled at 200 ℃ , the heating rate is 0.5°C / min, the pre-oxidation time is 2h, and then carbonized, the heating rate is controlled to be 5°C / min, the carbonization temperature is 900°C, and the carbonization time is 2h to obtain the lignin-based carbon nanofiber membrane material, Finally, the alkali lignin-based electrospun carbon fibers are obtained by grinding. It is used as an anode material for lithium batteries, and electrochemical tests are carried out. The research shows that the lignin-based carbon fiber material has ...

Embodiment 2

[0026] A lignin-based nanofiber film was prepared by electrospinning with a 5 / 5 (w / w) N,N-dimethylformamide solution with a mass fraction of 15% sambarine lignin / polyacrylonitrile. Electrospinning The conditions are as follows: the static voltage is 20KV, the receiving distance is 20cm, and the advancing speed of the spinning solution is 5mL / h; the nanofiber membrane is placed in a tube furnace for pre-oxidation and carbonization, and the pre-oxidation temperature is controlled at 200 ℃ , the heating rate is 0.5°C / min, the pre-oxidation time is 2h, and then carbonized, the heating rate is controlled to be 5°C / min, the carbonization temperature is 900°C, and the carbonization time is 2h to obtain the lignin-based carbon nanofiber membrane material, Finally, the alkali lignin-based electrospun carbon fibers are obtained by grinding. It is used as an anode material for lithium batteries, and electrochemical tests are carried out. The research shows that the lignin-based carbon fi...

Embodiment 3

[0028] A lignin-based nanofiber film was prepared by electrospinning with a solution of 7 / 3 (w / w) N,N-dimethylformamide with a mass fraction of 7 / 3 (w / w) polyacrylonitrile. The conditions are as follows: the static voltage is 20KV, the receiving distance is 15cm, and the advancing speed of the spinning solution is 3mL / h; the nanofiber membrane is placed in a tube furnace for pre-oxidation and carbonization, and the pre-oxidation temperature is controlled at 200 ℃ , the heating rate is 2°C / min, the pre-oxidation time is 2h, and then carbonized, the heating rate is controlled to be 5°C / min, the carbonization temperature is 900°C, and the carbonization time is 2h to obtain the lignin-based carbon nanofiber membrane material, Finally, the alkali lignin-based electrospun carbon fibers are obtained by grinding. It is used as an anode material for lithium batteries, and electrochemical tests are carried out. The research shows that the lignin-based carbon fiber material has good elec...

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Abstract

The invention belongs to the technical field of the biomass material processing and discloses an alkali lignin-based electrostatic spinning carbon fiber and a preparation method and application thereof. The preparation method comprises the steps of dissolving alkali lignin and polyacrylonitrile in N, N-dimethylformamide to obtain a uniform lignin/polyacrylonitrile solution; then performing electrostatic spinning to obtain a lignin-based nanofiber membrane; heating the membrane in carbonization equipment to 200-280 DEG C; pre-oxidizing for 2-8h in an air atmosphere, heating to 600-900 DEG C, carbonizing in nitrogen gas or argon gas atmosphere and grinding to obtain the alkali lignin-based electrostatic spinning carbon fiber. According to the method, alkali lignin and polyacrylonitrile are used as carbon sources of carbon materials, and the method has the advantages of environment friendliness and low preparation cost; and the carbon fiber can replace graphite to be used as the positive electrode material of a lithium battery.

Description

technical field [0001] The invention belongs to the technical field of biomass material processing, and in particular relates to an alkali lignin-based electrospinning carbon fiber and a preparation method and application thereof. Background technique [0002] With the increasingly aggravating energy problem, how to use green energy such as biomass energy more effectively and fully to solve the increasingly aggravating resource and environmental problems has been widely concerned by the society. [0003] As one of the most widespread resources in nature, lignin is the second largest amorphous polyphenol polymer in the plant kingdom after cellulose. It is a renewable, green and environmentally friendly natural polymer material. As a by-product of the paper industry, commercial lignin exists in the black liquor of papermaking and is rarely further processed and utilized, resulting in waste of resources and even environmental problems. The structure of lignin is complex, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/17D01F9/22H01M4/587
CPCD01F9/17D01F9/22H01M4/587Y02E60/10
Inventor 彭新文周子丹钟林新张礼慧孙润仓
Owner SOUTH CHINA UNIV OF TECH
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