Wood-based flexible electrode, preparation method and application thereof

A flexible electrode and wood-based technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of easily damaged substrates, affecting capacitor assembly, and reduced electrode flexibility, so as to achieve excellent electrical conductivity and reduce manufacturing costs. , Improve the effect of specific capacitance

Active Publication Date: 2020-09-08
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are some shortcomings in these studies: for example, using cross-section wood slices (wood) as the substrate, the substrate is easily damaged, and the flexibility of the electrode is greatly reduced.
However, when the wood flakes are de-ligninized, the shrinkage rate is very large during freeze-drying, and it is difficult to maintain the original shape to a large extent, which affects the assembly of capacitors, thereby affecting the energy and power density.
If the cross-section thin slices (wood) are delignified, it will be more difficult to maintain the original shape, and the bending performance will be greatly affected

Method used

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  • Wood-based flexible electrode, preparation method and application thereof
  • Wood-based flexible electrode, preparation method and application thereof
  • Wood-based flexible electrode, preparation method and application thereof

Examples

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Embodiment 1

[0037] A wood-based flexible electrode, using sliced ​​beech veneer as the substrate, graphene oxide is loaded in the pores of the substrate, and nano-MnO is loaded on the surface and pores of the substrate 2 , the outermost surface of the substrate is encapsulated with a graphite layer.

[0038] Such as figure 1 As shown, the preparation method of a kind of wood-based flexible electrode of the present embodiment comprises the following steps:

[0039] 1) Cut the sliced ​​veneer of beech wood with a thickness of 0.2 mm, rinsed with deionized water, and dried into a sheet of 60 mm×60 mm as a filter membrane, put it on the filter paper of the suction funnel, and pour the mass fraction of 2% The graphene oxide aqueous solution is carried out suction filtration as suction filtrate. During this process, the solution was permeated through the veneer and repeated three times, and the graphene oxide was loaded in the pores of the veneer. Then the veneer was flattened, dried at 60 ...

Embodiment 2

[0052] A kind of wood-based flexible electrode, with peeled mandshurica veneer as the substrate, graphene oxide is loaded in the pores of the substrate, and nano-MnO is loaded on the surface and pores of the substrate 2 , the outermost surface of the substrate is encapsulated with a graphite layer.

[0053] A method for preparing a wood-based flexible electrode of the present embodiment comprises the following steps:

[0054] 1) Cut the rotary-cut veneer of Fraxinus mandshurica wood with a thickness of 0.5 mm, rinsed with deionized water, and dried into 60 mm×60 mm sheets, put it on the filter paper of the suction funnel, and pour 3% of the mass fraction Graphene oxide aqueous solution is used as suction filtrate to carry out suction filtration. During this process, the solution was permeated through the veneer and repeated three times, and the graphene oxide was loaded in the pores of the veneer. Then the veneer was flattened, dried at 60 °C to a moisture content of 10%, an...

Embodiment 3

[0063] A wood-based flexible electrode, with sliced ​​red oak veneer as the substrate, graphene oxide loaded in the pores of the substrate, and nano-MnO loaded on the surface and pores of the substrate 2 , the outermost surface of the substrate is encapsulated with a graphite layer.

[0064] A method for preparing a wood-based flexible electrode of the present embodiment comprises the following steps:

[0065] 1) Cut the sliced ​​red oak veneer with a thickness of 0.8 mm, rinsed with deionized water, and dried into 60 mm×60 mm sheets, put them on the filter paper of the suction funnel, and pour 3% oxidation Graphene aqueous solution is carried out suction filtration as suction filtrate. During this process, the solution was permeated through the veneer and repeated three times, so that the graphene oxide was loaded in the pores of the veneer. Then the veneer was flattened, dried at 60 °C to a moisture content of 10%, and the graphene floating powder on the surface of the ven...

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Abstract

The invention discloses a wood-based flexible electrode, which takes rotary-cut or sliced veneer as a base material. Graphene oxide is loaded in pores of the base material, nano MnO2 is loaded on thesurface of the base material and in the pores, and a graphite layer is packaged on the outermost side of the surface of the base material. The invention also provides a preparation method of the wood-based flexible electrode. The preparation method comprises the following steps of: carrying out suction filtration treatment by taking a graphene oxide aqueous solution as suction filtration liquid and taking rotary-cut or sliced sheet-shaped veneer as a filter membrane; taking a graphite rod as a packaging material after drying, and uniformly packaging a graphite layer on one surface of the veneer; dipping the veneer into a KMnO4 aqueous solution at normal temperature, performing drying, then performing dipping into an alkaline solution of H2O2, and loading nano MnO2 through oxidation-reduction reaction; and uniformly packaging a graphite layer on the other surface of the veneer to obtain the wood-based flexible electrode. The method has the advantages of green and environmental friendliness, simplicity and feasibility.

Description

technical field [0001] The invention relates to the technical field of new energy supercapacitors, in particular to a wood-based flexible electrode and its preparation method and application. Background technique [0002] With the rapid development of electronic technology, flexible and portable electronic products have been widely used, especially in the fields of medical equipment, sports equipment and other fields. Flexible supercapacitors play a very important role as their power source: high energy and power density, Fast charging and discharging, high cycle times and safe use are its important performance indicators. At the same time, due to the huge unpredictability of the use environment and methods of portable electronic products, the requirements for flexible electrode materials in capacitors are also getting higher and higher. [0003] Supercapacitors, also known as electric double layer capacitors. Commonly used flexible supercapacitors are mainly composed of f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/44H01G11/32H01G11/46H01G11/24H01G11/86
CPCH01G11/44H01G11/32H01G11/46H01G11/24H01G11/86
Inventor 孙德林孙振宇余先纯陈浩伟张传艳
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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