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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

AI Technical Summary

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 high internal tap density, and ions cannot be extracted and embedded. , the electrolyte is difficult to penetrate, and the electrochemical performance as a battery negative electrode material is poor

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

Experimental program
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Effect test

Embodiment 1

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

[0031] (1) Preparation of precursor: Add 8g of sodium hydroxide and 10g of sodium sulfite into 150mL of distilled water, stir for 30 minutes until the solution becomes clear, and saw the dry wood along the vertical growth direction with length, width and height of 20mm, 20mm, 10mm wooden blocks, soak in the solution at room temperature for 2 hours, wash with distilled water continuously until the pH of the distilled water after cleaning is 7-8, and then dry the surface water with filter paper;

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

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

Embodiment 2

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

[0036] (1) Preparation of precursor: Add 8g of sodium hydroxide and 10g of sodium sulfite into 150mL of distilled water, stir for 30 minutes until the solution becomes clear, and saw the dry wood along the vertical growth direction with length, width and height of 20mm, 20mm, 10mm wooden blocks, soak in the solution at room temperature for 3 hours, wash with distilled water continuously until the pH of the distilled water after cleaning is 7-8, and then dry the water on the surface with filter paper;

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

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

Embodiment 3

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

[0041] (1) Preparation of precursor: Add 8g of sodium hydroxide and 10g of sodium sulfite into 150mL of distilled water, stir for 30min until the solution becomes clear, and saw the dry wood along the vertical growth direction with length, width, and height of 20mm, 20mm, 10mm wooden blocks, soak in the solution at room temperature for 4 hours, wash with distilled water continuously until the pH of the distilled water after cleaning is 7-8, and then dry the water on the surface with filter paper;

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

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

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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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