Method for preparing three-dimensional pore channel structure by taking wood as raw material

A three-dimensional channel and wood technology, which is applied in structural parts, carbon preparation/purification, nanotechnology for materials and surface science, etc., can solve the problem of poor electrochemical performance of battery negative electrode materials, inability to extract and embed ions, and electrolyte Difficult to penetrate and other issues, to achieve the effect of large-scale production, complete three-dimensional channel structure, and extensive commercialization

Inactive Publication Date: 2021-01-08
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Natural wood is rich in cellulose, hemicellulose and lignin, and the three are cross-linked to form a dense tree. The electrode material prepared by direct one-step carbonization of natural wood has a

Method used

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  • Method for preparing three-dimensional pore channel structure by taking wood as raw material
  • Method for preparing three-dimensional pore channel structure by taking wood as raw material
  • Method for preparing three-dimensional pore channel structure by taking wood as raw material

Examples

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Example Embodiment

[0029]Example 1

[0030]A method for preparing a three-dimensional pore structure using wood as a raw material includes the following steps:

[0031](1) Precursor preparation: Add 8g of sodium hydroxide and 10g of sodium sulfite to 150mL of distilled water, stir for 30min until the solution becomes clear, and saw the dry wood along the vertical growth direction. The width and height are 20mm, 20mm, respectively. 10mm wood block, soak in the solution for 2h at room temperature, wash with distilled water until the pH of the distilled water after cleaning=7~8, then use filter paper to absorb the water on the surface;

[0032](2) Put the wood block treated in step (1) into the refrigerator for 12 hours, and then put it in a vacuum freeze-drying oven for drying for 64 hours to remove the moisture in the wood block;

[0033](3) Put the dried wood block in step (2) into a tube furnace, and in an argon atmosphere, at a heating rate of 10°C / min, annealed at 1200°C for 1 hour to obtain a three-dimensiona...

Example Embodiment

[0034]Example 2

[0035]A method for preparing a three-dimensional pore structure using wood as a raw material includes the following steps:

[0036](1) Precursor preparation: Add 8g of sodium hydroxide and 10g of sodium sulfite to 150mL of distilled water, stir for 30min until the solution becomes clear, and saw the dry wood along the vertical growth direction. The width and height are 20mm, 20mm, respectively. 10mm wood block, soak in the solution for 3 hours at room temperature, wash with distilled water until the pH of the distilled water after cleaning = 7-8, then use filter paper to absorb the water on the surface;

[0037](2) Put the wood block treated in step (1) into the refrigerator for 12 hours, and then put it in a vacuum freeze-drying oven for drying for 64 hours to remove the moisture in the wood block;

[0038](3) Put the dried wood block in step (2) into a tube furnace, and in an argon atmosphere, at a heating rate of 10°C / min, annealed at 1200°C for 1 hour to obtain a three-dim...

Example Embodiment

[0039]Example 3

[0040]A method for preparing a three-dimensional pore structure using wood as a raw material includes the following steps:

[0041](1) Precursor preparation: Add 8g of sodium hydroxide and 10g of sodium sulfite to 150mL of distilled water, stir for 30min until the solution becomes clear, and saw the dry wood along the vertical growth direction. The width and height are 20mm, 20mm, respectively. 10mm wood block, soak in the solution at room temperature for 4 hours, wash with distilled water until the pH of the distilled water after cleaning = 7-8, then use filter paper to absorb the water on the surface;

[0042](2) Put the wood block treated in step (1) into the refrigerator for 12 hours, and then put it in a vacuum freeze-drying oven for drying for 64 hours to remove the moisture in the wood block;

[0043](3) Put the dried wood block in step (2) into a tube furnace, and in an argon atmosphere, at a heating rate of 10°C / min, annealed at 1200°C for 1 hour to obtain a three-dim...

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Abstract

The invention provides a method for preparing a three-dimensional pore channel structure by taking wood as a raw material, and belongs to the technical field of battery negative electrode materials. According to the method, wood is used as a precursor, and the three-dimensional pore channel structure is obtained through three steps of chemical treatment, freeze drying and high-temperature carbonization. The three-dimensional pore channel structure regulated and controlled by the invention has excellent hierarchical pores, and has the following advantages as an electrode material of a battery and a supercapacitor: 1) the transmission distance of ions can be effectively shortened, and a continuous electron transmission path is provided; and 2) the micropores can provide a large number of adsorption sites for electrolyte ions, the mesopores can provide rapid ion migration channels, and the macropores can store the electrolyte in blocky particles, so that the transmission distance of the electrolyte ions from the electrolyte to the surface of the electrode is shortened.

Description

technical field [0001] The invention belongs to the technical field of battery negative electrode materials, and in particular relates to a method for preparing a three-dimensional pore structure using wood as a raw material. Background technique [0002] Since the Industrial Revolution, the use of traditional fossil fuels has caused massive global warming. It is imminent to develop cleaner solar energy, wind energy, water energy, etc. These energy sources have their own unique resource advantages, but they are uncertain and random, and it is difficult to guarantee them for a long time. The electrochemical energy storage system has good reliability, high safety, and is completely independent of the geographical environment. It is very important in the field of renewable energy, so it has broad application prospects. [0003] Lithium batteries have been commercialized due to their high specific energy, small self-discharge, and long cycle life. However, the scarcity of lith...

Claims

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Application Information

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IPC IPC(8): C01B32/05H01M4/587H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/05H01M4/587H01M10/054Y02E60/10
Inventor 王慧奇王美景伟锋李莹曹红红张锦芳张会念贾素萍胡胜亮
Owner ZHONGBEI UNIV
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