CN109742405A - Adjustable flexible electrode material in aperture and the preparation method and application thereof - Google Patents

Adjustable flexible electrode material in aperture and the preparation method and application thereof Download PDF

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CN109742405A
CN109742405A CN201811638211.2A CN201811638211A CN109742405A CN 109742405 A CN109742405 A CN 109742405A CN 201811638211 A CN201811638211 A CN 201811638211A CN 109742405 A CN109742405 A CN 109742405A
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electrode material
nano
flexible electrode
cellulose
melamine sponge
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CN109742405B (en
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吴义强
卿彦
张振
李蕾
罗莎
田翠花
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Central South University of Forestry and Technology
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Central South University of Forestry and Technology
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention discloses a kind of adjustable flexible electrode materials in aperture, the flexible electrode material is dual-network carbon structure, dual-network carbon structure includes level-one porous network carbon skeleton, second level porous network carbon skeleton is also filled in the hole of the level-one porous network carbon skeleton, the pore size of the flexible electrode material is 10~1500nm.The present invention correspondingly provides a kind of preparation method of adjustable flexible electrode material in above-mentioned aperture, application.Flexible electrode material of the invention has dual-network structure, can realize the adjusting of the pore size of flexible electrode material easily, provide good basis for subsequent other high active substances that further load of electrode material.In addition, in the present invention, flexible electrode material foldable ability flexible, elastic property, electrochemical performance.

Description

Adjustable flexible electrode material in aperture and the preparation method and application thereof
Technical field
The invention belongs to high molecular functional Material Field more particularly to a kind of flexible electrode material and preparation method thereof with Using.
Background technique
Today's society, since the renewal speed of electronic product is increasingly accelerated, the energy storage device of flexible becomes present The hot spot of scientific research gradually starts to be applied to because it has many advantages, such as light weight, flexible deformation, stability is good The fields such as foldable electronic, aerospace, portable device.It is strong that the collector of conventional batteries is generally copper foil, aluminium foil etc. Higher material is spent, easily causes the active ergastic substances being coated on material to fall off separation when bending, influences electricity The electrochemical stability in pond, therefore it is not suitable for flexible battery.It all must be soft that flexible battery, which requires all material in battery, Property flexible, including electrode and diaphragm material, and also to guarantee that flexible battery has excellent chemical property and circulation Stability.
In order to meet the specific demand of flexible battery, it is necessary to find new material or be improved to current material and reached To the performance of flexible foldable.Current some flexible electrode materials mostly use the materials such as graphene, carbon nanotube, manganese dioxide It is obtained after being prepared into laminated film by the methods of suction filtration film forming, but there are some problems for these flexible electrode materials: (1) soft Property electrode material is easily broken off after by multiple bending deformation, is affected to the overall performance of battery;(2) flexible electrode material Pore size and size inside material cannot be effectively controlled, and can not load other efficient active matter materials in material internal Material.Therefore, a kind of adjustable flexible electrode material in aperture is developed for promoting the development of flexible battery to be of great significance.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, one kind is provided With Multi-network, the adjustable flexible electrode material in aperture and the preparation method and application thereof.In order to solve the above technical problems, Technical solution proposed by the present invention are as follows:
A kind of adjustable flexible electrode material in aperture, the flexible electrode material are dual-network carbon structure, dual-network Carbon structure includes level-one porous network carbon skeleton, is also filled with second level porous web in the hole of the level-one porous network carbon skeleton Network carbon skeleton, the pore size of the flexible electrode material are 10~1500nm.
In above-mentioned electrode material, it is preferred that the level-one porous network carbon skeleton is carbonized by melamine sponge, institute The pore size for stating melamine sponge is 50~100 μm, and the second level porous network carbon skeleton is by being filled in the melamine The nano-cellulose of amine sponge pore interior is carbonized.
As a general technical idea, the present invention also provides a kind of preparations of above-mentioned adjustable flexible electrode material in aperture Method, comprising the following steps:
(1) melamine sponge is immersed in nano-cellulose solution, and repeatedly squeezes melamine sponge, obtain nanometer Cellulose/melamine sponge composite material;
(2) nano-cellulose obtained in step (2)/melamine sponge composite material freezed, be dried in vacuo Processing obtains nano-cellulose/melamine sponge matrix material;
(3) under an inert atmosphere, nano-cellulose obtained in step (2)/melamine sponge matrix material is carried out High temperature cabonization handles to arrive flexible electrode material.
In above-mentioned preparation method, it is preferred that in the step (1), the preparation method of nano-cellulose solution includes following Step: taking nano cellulose sol, deploys nano-cellulose solution by ultrapure water, then ultrasound is broken in ultrasonic grind instrument Broken 1~7min is to get to uniformly mixed nano-cellulose solution.
In above-mentioned preparation method, it is preferred that in the step (1), the thickness control of melamine sponge is 3~10mm. Wherein, the thickness control of melamine sponge is that 3~10mm enters inside melamine sponge convenient for nano-cellulose.
In above-mentioned preparation method, it is preferred that the mass fraction control of the nano-cellulose solution is 0.1~0.5%, institute Stating the pore size inside flexible electrode material is 300~1500nm;Or the mass fraction control of the nano-cellulose solution It is 0.5~1.0%, the pore size inside the flexible electrode material is 10~300nm.The mass concentration pair of nano-cellulose The aperture of flexible electrode material and chemical property have a great impact in the present invention, the mass fraction of nano-cellulose solution It is too low, it will affect the chemical property of material, mass fraction is excessively high, and nano-cellulose is excessively sticky, in subsequent step, Nanowire Dimension element is difficult to enter inside melamine sponge.
In above-mentioned preparation method, it is preferred that the mass fraction control of the nano-cellulose solution is 0.85~1.0%, Pore size inside the flexible electrode material is 10~80nm.The mesoporous electrochemistry for carbon material in electrode material Can influence it is most important, for the flexible electrode material, when control nano-cellulose solution mass fraction be 0.85~ When 1.0%, electrode material internal void intermediary hole (2~50nm) content is higher, can be very good the electrification for improving electrode material Learn performance.
In above-mentioned preparation method, it is preferred that in the step (2), freezing, vacuum drying treatment when, cryogenic temperature be -50 ~-30 DEG C, cooling time is 5~9h, when vacuum drying treatment, prior to -40~-20 DEG C at be dried in vacuo 5~9h, then at room temperature Lower drying 12~for 24 hours.
In above-mentioned preparation method, it is preferred that when high temperature cabonization processing, control carburizing temperature is 700~1000 DEG C.It is logical It crosses and thermal decomposition process, nano-cellulose is carried out to nano-cellulose/melamine sponge matrix material in this temperature range It can thermally decompose with melamine sponge as carbon material, obtain with flexible, good conductivity, porous super capacitor electrode Pole material.If temperature is lower than this temperature, because can not carbonization if obtained nano-cellulose/sponge compound matrix material And electric conductivity and energy-storage property is caused to die down;If temperature is higher than this temperature, if nano-cellulose/sponge compound matrix material It will appear part graphitization, so that so that integral material is become fragile leads to the reduction of compound matrix material flexible ability.
In above-mentioned preparation method, the technological parameter of freezing, vacuum drying treatment and high temperature cabonization processing is in the present invention The performance of flexible electrode material has large effect, controls as the electrode material of the available high combination property of above-mentioned technological parameter Material.
As a general technical idea, the present invention also provides a kind of application of above-mentioned flexible electrode material, using described Flexible electrode material load high active substance obtains high activity electrode material, and the high active substance includes metal, metal oxidation Object or high molecular polymer (such as polyaniline), the load capacity of the high active substance not less than 7% (after loading, high activity object The amount of matter accounts for the percentage of electrode gross mass not less than 7%).By regulating and controlling the aperture of electrode material matrix, may be implemented in electricity The compound or various sizes of active material of growth on the material of pole.Aperture hour can load the high molecular polymers material such as polyaniline Material, can adsorb the materials such as the slightly larger metal of ruler diameter and its oxide, to realize different pore size for different work when aperture is big The efficient absorption of property material and utilization.
Nano-cellulose is the degradable free of contamination macromolecule obtained by the cellulose in nature by nanotechnology Material has very strong renewable and excellent biodegradability, due to the large specific surface area of nano-cellulose, small ruler Very little effect increases, so having very strong chemical reactivity, after carbonization, still remains with above-mentioned property.Melamine sponge It is a kind of novel foam of three-dimensional net structure for having high opening rate, there are the spies such as excellent elasticity, flexibility, high-specific surface area Different performance can be applied in various fields such as aviation, electromechanics, electronic products, be had a vast market foreground.It is adsorbed by squeezing Mode by nano-cellulose be implanted into melamine sponge inside, nano-cellulose pass through hydrogen bond, Van der Waals force the effects of power it is steady Be scheduled on inside melamine and formed nano-cellulose network structure, can by control the mass fraction of nano-cellulose come pair The aperture of composite inner carries out Effective Regulation, to obtain with dual-network structure, aperture is adjustable, flexible excellent one The nano-electrode material of change.
Compared with the prior art, the advantages of the present invention are as follows:
1, flexible electrode material of the invention has dual-network structure, by the way that nano-cellulose is adsorbed on melamine Inside sponge, nano-cellulose network structure is constructed in original network structure inside sponge, by controlling nano-cellulose Concentration regulate and control the network structure and pore size of nano-cellulose inside sponge, can realize flexible electrode material easily The adjusting of the pore size of material provides good basis for subsequent other high active substances that further load of electrode material.
2, in the present invention, skeleton structure of the melamine sponge as complex carbon material, by high temperature thermal decomposition at carbon materials Elasticity and flexibility after material still have excellent mechanical property, impart flexible electrical in the present invention there is no being destroyed The foldable ability of pole material flexibility and excellent elastic property.
3, the electrochemical performance of flexible electrode material of the present invention, melamine sponge inside are filled with nano-cellulose Carbon material increases the contact area between electrode material and electrolyte, and contacting with each other between carbon material skeleton can mention High inner conductive rate, so as to keep the chemical property of electrode material more excellent.In current density 1Ag-1When test 157.0Fg is reached as high as to its specific capacitance-1, about 4 times are improved for the specific capacitance of melamine sponge carbon material, And there is very low resistance value, about 0.8 Ω or so.
4, preparation method of the invention is easy to operate, controllability is strong, and material plant fiber source is extensive, low in cost, Meet Green Sustainable strategic objective.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention Some embodiments for those of ordinary skill in the art without creative efforts, can also basis These attached drawings obtain other attached drawings.
Fig. 1 is the pictorial diagram of flexible electrode material in embodiment 1.
Fig. 2 is the microstructure electron microscope for the flexible electrode material being prepared in embodiment 3, comparative example 2 and embodiment 4 (b, c, d respectively correspond embodiment 3, comparative example 2 and embodiment 4).
Fig. 3 is the flexible foldable performance test figure for the flexible electrode material that embodiment 3 is prepared.
Fig. 4 is the cyclic voltammetry figure for the flexible electrode material being prepared in Examples 1 to 4 and comparative example 1.
Fig. 5 is that the flexible electrode material being prepared in embodiment 2 and comparative example 1 adsorbs MnO2Comparison diagram (a, b of particle Respectively correspond embodiment 2 and comparative example 1).
Specific embodiment
To facilitate the understanding of the present invention, the present invention is made below in conjunction with Figure of description and preferred embodiment more complete Face meticulously describes, but the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city Field is commercially available or can be prepared by existing method.
Embodiment 1:
A kind of adjustable flexible electrode material in aperture, the flexible electrode material are dual-network carbon structure, dual-network carbon Structure includes level-one porous network carbon skeleton, and second level porous network carbon bone is also filled in the hole of level-one porous network carbon skeleton Frame.Wherein, level-one porous network carbon skeleton is carbonized by melamine sponge, and second level porous network carbon skeleton is by being filled in three The nano-cellulose of poly cyanamid sponge pore interior is carbonized.The pore size of flexible electrode material in the present embodiment is about 500~1000nm.
The preparation method of the above-mentioned adjustable flexible electrode material in aperture, comprising the following steps:
(1) nano cellulose sol is taken, deploying nano-cellulose liquid quality fraction by ultrapure water is 0.1%, then The ultrasonication 5min in ultrasonic grind instrument obtains uniformly mixed nano-cellulose solution;
(2) melamine sponge is obtained into the melamine sponge sheet with a thickness of 7mm by slicing treatment;
(3) the melamine sponge sheet in step (2) is put into step (1) in configured nano-cellulose solution, Nano-cellulose is entered inside sponge by repeatedly squeezing sponge matrix, and it is multiple to obtain nano-cellulose/melamine sponge Condensation material;
(4) freezing for nano-cellulose obtained in step (3)/melamine sponge composite material being placed in -30 DEG C is dry Freeze 5h in dry machine, 5h be then dried in vacuo at -30 DEG C, is finally dried in vacuo 12h at room temperature, obtain nano-cellulose/ Melamine sponge matrix material;
(5) nano-cellulose obtained in step (4)/melamine sponge matrix material is placed in tube furnace, is led to The adjustable flexibility in above-mentioned aperture can be obtained after the completion of 700 DEG C of progress high temperature thermal decomposition processing, carbonization after entering inert gas Electrode material.
Fig. 1 is the pictorial diagram for the flexible electrode material being prepared in the present embodiment.As seen from the figure, the flexible electrode material Morphological rules is easy to be assembled into supercapacitor as electrode material.
Embodiment 2:
A kind of adjustable flexible electrode material in aperture, the flexible electrode material are dual-network carbon structure, dual-network carbon Structure includes level-one porous network carbon skeleton, and second level porous network carbon bone is also filled in the hole of level-one porous network carbon skeleton Frame.Wherein, level-one porous network carbon skeleton is carbonized by melamine sponge, and second level porous network carbon skeleton is by being filled in three The nano-cellulose of poly cyanamid sponge pore interior is carbonized.The pore size of flexible electrode material in the present embodiment is about 20~300nm.
The preparation method of the above-mentioned adjustable flexible electrode material in aperture, comprising the following steps:
(1) nano cellulose sol is taken, deploying nano-cellulose liquid quality fraction by ultrapure water is 0.5%, then The ultrasonication 3min in ultrasonic grind instrument obtains uniformly mixed nano-cellulose solution;
(2) melamine sponge is obtained into the melamine sponge sheet with a thickness of 5mm by slicing treatment;
(3) the melamine sponge sheet in step (2) is put into step (1) in configured nano-cellulose solution, Nano-cellulose is entered inside sponge by repeatedly squeezing sponge matrix, and it is multiple to obtain nano-cellulose/melamine sponge Condensation material;
(4) freezing for nano-cellulose obtained in step (3)/melamine sponge composite material being placed in -40 DEG C is dry Freeze 7h in dry machine, 7h be then dried in vacuo at -40 DEG C, is finally dried in vacuo 18h at room temperature, obtain nano-cellulose/ Melamine sponge matrix material;
(5) nano-cellulose obtained in step (4)/melamine sponge matrix material is placed in tube furnace, is led to The adjustable flexibility in above-mentioned aperture can be obtained after the completion of 800 DEG C of progress high temperature thermal decomposition processing, charing after entering inert gas Electrode material.
Embodiment 3:
A kind of adjustable flexible electrode material in aperture, the flexible electrode material are dual-network carbon structure, dual-network carbon Structure includes level-one porous network carbon skeleton, and second level porous network carbon bone is also filled in the hole of level-one porous network carbon skeleton Frame.Wherein, level-one porous network carbon skeleton is carbonized by melamine sponge, and second level porous network carbon skeleton is by being filled in three The nano-cellulose of poly cyanamid sponge pore interior is carbonized.The pore size of flexible electrode material in the present embodiment is about 20~200nm.
The preparation method of the above-mentioned adjustable flexible electrode material in aperture, comprising the following steps:
(1) nano cellulose sol is taken, deploying nano-cellulose liquid quality fraction by ultrapure water is 0.8%, then The ultrasonication 7min in ultrasonic grind instrument obtains uniformly mixed nano-cellulose solution;
(2) melamine sponge is obtained into the melamine sponge sheet with a thickness of 3mm by slicing treatment;
(3) the melamine sponge sheet in step (2) is put into step (1) in configured nano-cellulose solution, Nano-cellulose is entered inside sponge by repeatedly squeezing sponge matrix, and it is multiple to obtain nano-cellulose/melamine sponge Condensation material;
(4) freezing for nano-cellulose obtained in step (3)/melamine sponge composite material being placed in -50 DEG C is dry Freeze 9h in dry machine, 9h be then dried in vacuo at -40 DEG C, be finally dried in vacuo at room temperature for 24 hours, obtain nano-cellulose/ Melamine sponge matrix material;
(5) nano-cellulose obtained in step (4)/melamine sponge matrix material is placed in tube furnace, is led to The adjustable flexibility in above-mentioned aperture can be obtained after the completion of 1000 DEG C of progress high temperature thermal decomposition processing, charing after entering inert gas Electrode material.
Fig. 2 (b) is the microstructure electron microscope for the flexible electrode material being prepared in embodiment.As seen from the figure, in sea The lamellar structure for having nano-cellulose to be formed in continuous skeleton, this lamellar structure and sponge skeleton structure form sponge-Nanowire Tie up dual structure.
Fig. 3 is the flexible foldable performance test figure for the flexible electrode material that the present embodiment is prepared.It is folding in left figure Fold the flexible electrode material, right figure is the expanded view of the flexible electrode material after folding, it can be seen that by folding-expansion, The form of the electrode material has no influence, and by repeatedly folding-expansion, form there is no variation, can be also used in On flexible super capacitor electrode material.
Embodiment 4:
A kind of adjustable flexible electrode material in aperture, the flexible electrode material are dual-network carbon structure, dual-network carbon Structure includes level-one porous network carbon skeleton, and second level porous network carbon bone is also filled in the hole of level-one porous network carbon skeleton Frame.Wherein, level-one porous network carbon skeleton is carbonized by melamine sponge, and second level porous network carbon skeleton is by being filled in three The nano-cellulose of poly cyanamid sponge pore interior is carbonized.The pore size of flexible electrode material in the present embodiment is about 10~80nm.
The preparation method of the above-mentioned adjustable flexible electrode material in aperture, comprising the following steps:
(1) nano cellulose sol is taken, deploying nano-cellulose liquid quality fraction by ultrapure water is 0.9%, then The ultrasonication 7min in ultrasonic grind instrument obtains uniformly mixed nano-cellulose solution;
(2) melamine sponge is obtained into the melamine sponge sheet with a thickness of 9mm by slicing treatment;
(3) the melamine sponge sheet in step (2) is put into step (1) in configured nano-cellulose solution, Nano-cellulose is entered inside sponge by repeatedly squeezing sponge matrix, and it is multiple to obtain nano-cellulose/melamine sponge Condensation material;
(4) freezing for nano-cellulose obtained in step (3)/melamine sponge composite material being placed in -50 DEG C is dry Freeze 9h in dry machine, 9h be then dried in vacuo at -40 DEG C, be finally dried in vacuo at room temperature for 24 hours, obtain nano-cellulose/ Melamine sponge matrix material;
(5) nano-cellulose obtained in step (4)/melamine sponge matrix material is placed in tube furnace, is led to The adjustable flexibility in above-mentioned aperture can be obtained after the completion of 950 DEG C of progress high temperature thermal decomposition processing, charing after entering inert gas Electrode material.
Fig. 2 (d) is the microstructure electron microscope for the flexible electrode material being prepared in embodiment.As seen from the figure, in sea The lamellar structure for having nano-cellulose to be formed in continuous skeleton, this lamellar structure and sponge skeleton structure form sponge-Nanowire Tie up dual structure.
Comparative example 1:
This comparative example directly by the melamine sponge sheet in embodiment 1 chilled, vacuum drying, at high temperature thermal decomposition It manages to get flexible electrode material is arrived.The pore size of the flexible electrode material is 50~100 μm.
Fig. 4 is the cyclic voltammetry figure for the flexible electrode material being prepared in Examples 1 to 4 and comparative example 1, by scheming It is found that the flexible electrode material in Examples 1 to 4 and comparative example 1 is in current density 1Ag-1When its electrochemical performance data such as Shown in the following table 1, the specific capacitance of the flexible electrode material by nano-cellulose regulation is better than not regulating and controlling melamine sponge substrate Specific capacitance.
Table 1: the specific capacitance contrast table of Examples 1 to 4 and 1 flexible electrode material of comparative example
Sample Specific capacitance
Comparative example 1 31.5F/g
Embodiment 1 129.7F/g
Embodiment 2 117.6F/g
Embodiment 3 134.1F/g
Embodiment 4 157.0F/g
Fig. 5 (a) is to load MnO by hydro-thermal method using the flexible electrode material being prepared in embodiment 22After particle Electron microscope, Fig. 5 (b) are to load MnO by hydro-thermal method using the flexible electrode material being prepared in this comparative example2After particle Electron microscope, as seen from the figure, the MnO of the load in embodiment 22The amount (> 7%) of particle is significantly more than to be loaded in this comparative example It measures (about 3% or so), the advantage in subsequent further application process of the flexible electrode material in embodiment 2 is more obvious.
Comparative example 2:
This comparative example compared with Example 1, the difference is that only that the mass fraction of nano-cellulose is 1.3%.This is soft The pore size of property electrode material is about 40~80 μm.
Fig. 2 (c) is the microstructure electron microscope for the flexible electrode material being prepared in this comparative example.As seen from the figure, when When nano-cellulose concentration is 1.3%, nano-cellulose is difficult to enter into inside sponge, to be unable to reach the internal aperture of regulation Purpose.

Claims (10)

1. a kind of adjustable flexible electrode material in aperture, which is characterized in that the flexible electrode material is dual-network carbon structure, Dual-network carbon structure includes level-one porous network carbon skeleton, is also filled with two in the hole of the level-one porous network carbon skeleton Grade porous network carbon skeleton, the pore size of the flexible electrode material are 10~1500nm.
2. electrode material according to claim 1, which is characterized in that the level-one porous network carbon skeleton is by melamine Sponge is carbonized, and the pore size of the melamine sponge is 50~100 μm, and the second level porous network carbon skeleton is by filling out The nano-cellulose filled in the melamine sponge pore interior is carbonized.
3. a kind of preparation method of the adjustable flexible electrode material in aperture, which comprises the following steps:
(1) melamine sponge is immersed in nano-cellulose solution, and repeatedly squeezes melamine sponge, obtain nanofiber Element/melamine sponge composite material;
(2) nano-cellulose obtained in step (2)/melamine sponge composite material is freezed, vacuum drying treatment Obtain nano-cellulose/melamine sponge matrix material;
(3) under an inert atmosphere, nano-cellulose obtained in step (2)/melamine sponge matrix material is subjected to high temperature Carbonization treatment to get arrive flexible electrode material.
4. preparation method according to claim 3, which is characterized in that in the step (1), the system of nano-cellulose solution Preparation Method is the following steps are included: take nano cellulose sol, by ultrapure water allotment nano-cellulose solution, then in ultrasonic wave 1~7min of ultrasonication is in crusher to get to uniformly mixed nano-cellulose solution.
5. preparation method according to claim 3, which is characterized in that in the step (1), the thickness of melamine sponge Control is 3~10mm.
6. preparation method according to claim 3, which is characterized in that the mass fraction of the nano-cellulose solution controls It is 0.1~0.5%, the pore size inside the flexible electrode material is 300~1500nm;Or the nano-cellulose solution Mass fraction control be 0.5~1.0%, the pore size inside the flexible electrode material is 10~300nm.
7. preparation method according to claim 6, which is characterized in that the mass fraction of the nano-cellulose solution controls It is 0.85~1.0%, the pore size inside the flexible electrode material is 10~80nm.
8. the preparation method according to any one of claim 3~7, which is characterized in that in the step (2), freeze, is true When sky is dried, cryogenic temperature is -50~-30 DEG C, and cooling time is 5~9h, when vacuum drying treatment, prior to -40~-20 At DEG C be dried in vacuo 5~9h, then at room temperature dry 12~for 24 hours.
9. the preparation method according to any one of claim 3~7, which is characterized in that when high temperature cabonization processing, control Carburizing temperature processed is 700~1000 DEG C.
10. a kind of as claimed in claim 1 or 2 or preparation method as described in any one of claim 3~9 obtains flexibility The application of electrode material, which is characterized in that obtain high activity electrode material using flexible electrode material load high active substance Material, the high active substance includes metal, metal oxide or high molecular polymer, and the load capacity of the high active substance is not low In 7%.
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