Wood base compounding electrode material and preparing method thereof

A composite electrode, wood-based technology, used in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, battery electrodes, etc., can solve the problems of decreased electrochemical performance, prone to cracking, and inability to fully utilize the cavity structure of wood cells. , to achieve the effect of reducing brittleness, improving flexibility, and improving flexibility

Inactive Publication Date: 2018-02-27
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Our team has reported research on wood electrode materials formed by compounding wood with polypyrrole, polyaniline or graphene, but at present, the existing composite methods are polypyrrole, polyaniline in-situ polymerization or graphene adsorption deposition on the surface of wood cell lumen , unable to give full play to the pore structure of the wood cell cavity
Moreover, natural wood has a certain degree of brittleness, because of its low moisture content, it is prone to cracking, resulting in the decrease of the electrochemical performance of the above-mentioned wooden electrode after repeated bending, which limits the full play of its electrochemical properties

Method used

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  • Wood base compounding electrode material and preparing method thereof
  • Wood base compounding electrode material and preparing method thereof
  • Wood base compounding electrode material and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) slice the fir sapwood along the direction perpendicular to the axial direction to obtain a wood slice with a thickness of 180 μm and a length and width of 2cm×1cm;

[0036] 2) Put 10 pieces of wood flakes (about 0.1 g) obtained in step 1) into a mixed solution consisting of 5 g of concentrated nitric acid and 5 g of dichloromethane, and keep at 6° C. for 1 minute;

[0037] 3) Take out the 10 pieces of wood flakes obtained in step 2), and quickly immerse them in boiling water at 100°C for 5 minutes;

[0038] 4) Take out the 10 wood flakes obtained in step 3), dry them naturally, and then soak them in 1 mg / mL graphene oxide dispersion for 2 hours;

[0039] 5) Take out the 10 wood slices obtained in step 4), freeze them with liquid nitrogen for 1 minute, and then freeze-dry them for 2 days;

[0040] 6) Take out 10 pieces of wood flakes (about 0.15g) obtained in step 5), immerse them in a hydrothermal reaction kettle filled with 5g of hydrazine hydrate and 10g of ammoni...

Embodiment 2

[0046] 1) slice the cedar sapwood along the direction perpendicular to the axial direction to obtain a wood slice with a thickness of 180 μm and a length and width of 2 cm×1 cm;

[0047] 2) Put 10 pieces of wood flakes (about 0.1 g) obtained in step 1) into a mixture of 5 g of concentrated nitric acid and 10 g of dichloromethane, and keep at 6° C. for 1 minute;

[0048] 3) Take out the 10 pieces of wood flakes obtained in step 2), and quickly immerse them in boiling water at 100°C for 5 minutes;

[0049] 4) Take out the 10 wood flakes obtained in step 3), dry them naturally, and then soak them in 1.5 mg / mL graphene oxide dispersion for 2 hours;

[0050] 5) Take out the 10 wood slices obtained in step 4), freeze them with liquid nitrogen for 1 minute, and then freeze-dry them for 2 days;

[0051] 6) Take out 10 pieces of wood flakes (about 0.15g) obtained in step 5), immerse them in a hydrothermal reaction kettle filled with 4.5g of hydrazine hydrate and 18g of ammonia water, ...

Embodiment 3

[0057] 1) Slice the basswood sapwood along a direction perpendicular to the axial direction to obtain a thin slice of wood with a thickness of 240 μm and a length and width of 2 cm × 1 cm;

[0058] 2) Put 10 pieces of wood flakes (about 0.15g) obtained in step 1) into a mixture composed of 7.5g of concentrated nitric acid and 22.5g of dichloromethane, and keep at 8°C for 1 minute;

[0059] 3) Take out the 10 pieces of wood flakes obtained in step 2), and quickly immerse them in boiling water at 100°C for 8 minutes;

[0060] 4) Take out the 10 wood flakes obtained in step 3), dry them naturally, and then soak them in 2.0 mg / mL graphene oxide dispersion for 2 hours;

[0061] 5) Take out the 10 wood slices obtained in step 4), freeze them with liquid nitrogen for 1 minute, and then freeze-dry them for 2 days;

[0062] 6) Take out 10 pieces of wood flakes (about 0.25g) obtained in step 5), immerse them in a hydrothermal reaction kettle filled with 7.14g of hydrazine hydrate and 4...

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Abstract

The invention discloses a preparing method of a wood base compounding electrode material. The preparing method comprises the following steps of cutting wood to obtain cross section wood thin sheets; conducting surface esterification treatment on the wood thin sheets in mixed liquid of concentrated nitric acid and dichloromethane; after soaking the esterified wood thin sheets in graphene oxide dispersing liquid, conducting freezing and lyophilization treatment; then conducting a reduction reaction on the wood thin sheets, to which graphene oxide is attached, into a hydrothermal reaction kettleloaded with hydrazine hydrate and ammonium hydroxide; then soaking the reduced graphene oxide wood thin sheets into mixed liquid of conducting macromolecular monomers and a hydrochloric acid solution,dropwise adding mixed liquid of ferric trichloride, ammonium persulfate or potassium peroxodisulfate and the hydrochloric acid solution into the mixture to be subjected to an in situ polymerization reaction to obtain the wood base compounding electrode material. The invention further relates to the wood base compounding electrode material prepared through the method.

Description

technical field [0001] The invention relates to the field of electrode materials, in particular to a wood-based composite electrode material and a preparation method thereof. Background technique [0002] In recent years, cellulose-based energy storage materials for lithium-ion batteries and supercapacitors have attracted unprecedented attention. In particular, nano-cellulose is used as a carrier and various electrochemically active materials (conductive polymers, such as polypyrrole, polyaniline, etc.; nano-carbon materials, such as graphene, graphene oxide, carbon nanotubes, etc.) to form excellent performance Novel nanocellulose-based energy storage materials. [0003] The excellent performance of nanocellulose-based energy storage materials is closely related to the excellent properties of nanocellulose itself, and these excellent properties are derived from its raw materials, such as wood. However, from wood to wood pulp to nanocellulose, a series of processes of its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/86H01M4/139
CPCH01G11/24H01G11/30H01G11/86H01M4/139Y02E60/10
Inventor 吕少一陈艳萍韩申杰傅峰陈志林
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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