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Preparation method of wearable supercapacitor electrode

A supercapacitor and electrode technology, which is applied in the field of preparation of melt-spun lignin-based carbon fiber electrodes, can solve the problems of discontinuous mesoporous structure, poor weaving, and low electrical conductivity, and achieves excellent quality, good electrical conductivity, and fiber Good spinning effect

Active Publication Date: 2019-03-22
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the poor weavability, low electrical conductivity, and discontinuous mesoporous structure of carbon fiber electrodes in the prior art, the purpose of the present invention is to provide a preparation of a melt-spun lignin-based carbon fiber electrode for wearable supercapacitor electrodes method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 1g of PEO to 200ml of DMF solution containing 0.5g of multi-walled carbon nanotubes, fully dissolve at 60°C, add 1g of PEG-PPG-PEG triblock copolymer, mix well and add 100g of lignin (weight average molecular weight was 3500), and continued to stir for 3h. The resulting mixed solution was freeze-dried for 8 hours to obtain a lignin / PEO / PEG-PPG-PEG / CNT composite material.

[0026] Put the obtained composite material into a melt spinning machine for melt spinning, the spinning temperature is 210°C, the size of the spinneret is 0.20mm×10f, and the spinning speed is 100m / min to obtain lignin / PEO / PEG-PPG - PEG / CNT composite fibers.

[0027] The obtained composite fibers were pre-oxidized and carbonized in a tube furnace, and the temperature was first raised to 270°C at a rate of 0.1°C / min, and kept at a constant temperature for 1h. Then, the temperature was raised to 1000 °C at a heating rate of 1 °C / min for carbonization, and the carbonization time was 1 h to obtain a...

Embodiment 2

[0030] Add 1g of PEO to 200ml of DMF containing 1g of multi-walled carbon nanotubes, fully dissolve at 60°C, add 2g of PEG-PPG-PEG triblock copolymer, mix well and add 100g of lignin (weight average molecular weight is 3500) , continue stirring for 5h. The resulting mixed solution was freeze-dried for 12 hours to obtain a lignin / PEO / PEG-PPG-PEG / CNT composite material.

[0031] The obtained composite material is added to a melt spinning machine for melt spinning, the spinning temperature is 215°C, the size of the spinneret is 0.20mm×10f, and the spinning speed is 150m / min to obtain lignin / PEO / PEG-PPG - PEG / CNT composite fibers.

[0032] The obtained composite fibers were pre-oxidized and carbonized in a tube furnace, and the temperature was raised to 270°C at a rate of 0.25°C / min, and kept at a constant temperature for 1 hour. Then, the temperature was raised to 1200 °C at a heating rate of 3 °C / min for carbonization, and the carbonization time was 1 h to obtain a melt-spun l...

Embodiment 3

[0035] Add 2g of PEO to 200ml of DMF containing 1.5g of multi-walled carbon nanotubes, fully dissolve at 60°C, add 2g of PEG-PPG-PEG triblock copolymer, mix well and add 100g of lignin (weight average molecular weight is 3500 ), continue stirring for 3h. The resulting mixed solution was freeze-dried for 10 h to obtain a lignin / PEO / PEG-PPG-PEG / CNT composite material.

[0036] Put the obtained composite material into a melt spinning machine for melt spinning, the spinning temperature is 230°C, the size of the spinneret is 0.20mm×10f, and the spinning speed is 200m / min to obtain lignin / PEO / PEG-PPG - PEG / CNT composite fibers.

[0037] The obtained composite fibers were pre-oxidized and carbonized in a tube furnace, and the temperature was first raised to 260°C at a rate of 0.30°C / min, and kept at a constant temperature for 2 hours. Then, the temperature was raised to 1000 °C at a heating rate of 1 °C / min for carbonization, and the carbonization time was 1 h to obtain a melt-spun...

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Abstract

The invention discloses a preparation method of a wearable supercapacitor electrode. The method comprises the following steps of: adding polyethylene oxide (PEO) into a N,N-dimethylformamide (DMF) solution with uniformly dispersed carbon nano tubes (CNT), dissolving polyethylene oxide, then adding an amphiphilic copolymer PEG-PPG-PEG, uniformly mixing, subsequently adding lignin, freezing and drying after the materials are completely and uniformly mixed to obtain a lignin / PEO / PEG-PPG-PEG / CNT composite material; adding the composite material into a melt-spinning machine for spinning to obtain alignin / PEO / PEG-PPG-PEG / CNT composite fiber; and placing the composite fiber in a tubular furnace and carbonizing to obtain a melt-spun lignin-based carbon fiber electrode, namely the wearable supercapacitor electrode. The electrode has the advantages of excellent conductivity, large specific surface area, continuous and controllable mesoporous structure and high knittability, is capable of carrying out continuous large-scale production, and has broad market development and application prospects.

Description

technical field [0001] The invention belongs to the technical field of preparation of supercapacitor electrodes, and relates to a method for preparing a melt-spun lignin-based carbon fiber electrode used for a wearable supercapacitor electrode. Background technique [0002] With the rapid development of wearable electronic devices, it is particularly urgent to develop suitable weavable, lightweight and efficient supercapacitors. The core issue is to construct electrodes with high energy density and power density. At present, the electrodes of wearable supercapacitors are mostly made of one-dimensional carbon nanotubes and two-dimensional graphene, and the high production cost greatly limits their application in the field of textile and clothing. And the use of papermaking waste lignin to prepare carbon fiber electrodes by melt-spinning method has become an effective way to reduce its cost. Chinese patent CN 106744793 A discloses a porous carbon material for alkali lignin-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/24D01F9/17H01G11/24H01G11/48H01G11/86
CPCD01F9/17D01F9/24H01G11/24H01G11/48H01G11/86Y02E60/13
Inventor 王世超唐建国苏宝泽刘继宪焦吉庆李海东
Owner QINGDAO UNIV