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A kind of preparation method of wood-based flexible composite electrode material

A composite electrode and base flexible technology, which is applied in the field of wood-based energy storage materials, can solve the problems of complex preparation process and poor flexibility, and achieve the effects of high conductivity, improved electrochemical performance, and excellent electrochemical performance

Inactive Publication Date: 2020-12-04
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned preparation method is either poor in flexibility, or the preparation process is complex

Method used

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  • A kind of preparation method of wood-based flexible composite electrode material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) The balsa wood is sliced ​​along the growth direction to obtain a wood substrate with a thickness of 0.5mm and a length and width of 4.5×2.5mm.

[0044] (2) The wood substrate obtained in step (1) was rinsed repeatedly with deionized water, and then placed in a vacuum drying oven at 60° C. for 12 hours for later use.

[0045] (3) Put the sample in step (2) into 2.5mol / L NaOH and 0.4mol / L NaOH 2 SO 3 In the mixed aqueous solution, heat in a water bath at 90°C for 90min.

[0046] (4) The delignified wood substrate in step (3) was washed sequentially with ethanol and deionized water, and the sample was first frozen in a refrigerator for 12 hours, and then transferred to a freeze dryer for freeze-drying at -45°C for 36 hours.

[0047] (5) Pretreat the carbon nanotube powder with concentrated sulfuric acid and nitric acid, add acetone solution, ultrasonically disperse for 1-2 hours, centrifuge with a high-speed centrifuge, and take the upper layer solution to obtain an...

Embodiment 2

[0054] (1) Slice the balsa wood along the growth direction to obtain a wood substrate with a thickness of 0.5 mm and a length and width of 4.5×2.5 mm.

[0055] (2) The wood substrate obtained in step (1) was rinsed repeatedly with deionized water, and then placed in a vacuum drying oven at 60° C. for 12 hours for later use.

[0056] (3) Dip the wood substrate in step (2) into NaClO 2 solution, with CH 3 Adjust the pH to 4.6 with COOH, heat and boil for 1h.

[0057] (4) The delignified wood substrate in step (3) was washed sequentially with ethanol and deionized water, and the sample was first frozen in a refrigerator for 12 hours, and then transferred to a freeze dryer for freeze-drying at -45°C for 36 hours.

[0058] (5) Pretreat the carbon nanotube powder with concentrated sulfuric acid and nitric acid, add acetone solution, ultrasonically disperse for 1-2 hours, centrifuge with a high-speed centrifuge, and take the upper layer solution to obtain an acetone dispersion of m...

Embodiment 3

[0065] (1) Slice poplar wood along the growth direction to obtain a wood substrate with a thickness of 0.5 mm and a length and width of 4.5×2.5 mm.

[0066] (2) The wood substrate obtained in step (1) was rinsed repeatedly with deionized water, and then placed in a vacuum drying oven at 60° C. for 12 hours for later use.

[0067] (3) Put the wood substrate in step (2) into 2.5mol / L NaOH and 0.4mol / L NaOH 2 SO 3 In the mixed aqueous solution, heat in a water bath at 90°C for 90min.

[0068] (4) The delignified wood substrate in step (3) was washed sequentially with ethanol and deionized water, and the sample was first frozen in a refrigerator for 12 hours, and then transferred to a freeze dryer for freeze-drying at -45°C for 36 hours.

[0069] (5) Pretreat the carbon nanotube powder with concentrated sulfuric acid and nitric acid, add acetone solution, ultrasonically disperse for 1-2 hours, centrifuge with a high-speed centrifuge, and take the upper layer solution to obtain a...

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Abstract

The invention discloses a preparation method of a wood-based flexible composite electrode material, comprising the steps of: slicing wood in a vertical growth direction to prepare a cross-section woodsubstrate; immersing the substrate in a buffer mixed liquid for delignification, and freeze-drying the substrate to obtaining a flexible wood substrate; immersing the flexible wood substrate in a carbon nanotube dispersion for a ultrasonic-hydro-thermal treatment, and by means of a wood graded porous structure, enabling the hydroxyl groups on the lignocelluloses and the carboxyl groups on the acidified multi-wall carbon nanotube to form hydrogen bonds such that the carbon nanotube is self-assembled onto the surface of the wood and a pore canal to obtain a flexible wood conductive substrate; putting the conductive substrate in a mixed solution of KMnO4 and K2SO4 for a reduction reaction, and finally obtaining the wood-based flexible composite electrode material. The method of the inventionhas a simple preparation process, a mild reaction condition, contributes to industrial production, and can be widely applied to the fields of electrics, intelligent response materials and electromagnetic shielding materials.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a wood-based flexible composite electrode material, and belongs to the field of wood-based energy storage materials. Background technique [0002] In recent years, with the development of science and technology, flexible portable wearable electronic devices have shown unprecedented applications in various fields due to their high flexibility, stretchability, and light weight, such as military equipment, medical and biological monitoring equipment, Construction industry and home wearable electronics. Therefore, there will be a great market demand for flexible and lightweight energy storage devices, and flexible supercapacitors, one of the energy storage devices that are now receiving much attention, will have great development potential. [0003] Supercapacitor, also known as electrochemical capacitor, is a new type of energy storage and con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/26H01G11/30H01G11/36H01G11/46
CPCH01G11/26H01G11/30H01G11/36H01G11/46H01G11/86Y02E60/13
Inventor 刘毅张伟业李彦辰赵俊琪郭洪武
Owner BEIJING FORESTRY UNIVERSITY
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