CN108455584A - A kind of graphene aqueous slurry and preparation method thereof - Google Patents
A kind of graphene aqueous slurry and preparation method thereof Download PDFInfo
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- CN108455584A CN108455584A CN201710096827.0A CN201710096827A CN108455584A CN 108455584 A CN108455584 A CN 108455584A CN 201710096827 A CN201710096827 A CN 201710096827A CN 108455584 A CN108455584 A CN 108455584A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
- C01B2204/04—Specific amount of layers or specific thickness
Abstract
The invention discloses a kind of graphene aqueous slurries and preparation method thereof.The graphene aqueous slurry includes aqueous liquid dispersion and the grapheme material that is dispersed in the aqueous liquid dispersion, surfactant is contained in aqueous liquid dispersion, the mass percentage of the graphene is 0.2 12%.The preparation method of the graphene aqueous slurry includes the following steps：Using oxidation graphite solid or expansible graphite solid as raw material, expansion process is carried out, expanded graphite is prepared；Expanded graphite is soaked in infiltration in aqueous stripper to handle, obtains the mixture containing expanded graphite；Mixture containing expanded graphite is subjected to high speed shear or ultrasonication, water stripper is removed, obtains graphene wet feed；Graphene wet feed is placed in aqueous liquid dispersion, high speed shear processing is carried out, obtains graphene aqueous slurry.Graphene aqueous slurry prepared by the method for the present invention, can be applied to the fields such as conductive and heat-conductive coating, anticorrosive paint, battery/ultracapacitor.
Description
Technical field
The present invention is more particularly directed to a kind of graphene aqueous slurries and preparation method thereof, belong to grapheme material field.
Background technology
Graphene work is a kind of novel carbon nanomaterial, the nanometer as current most thin in the world (monoatomic thickness)
Material has contained abundant and peculiar physical and chemical performance, such as huge specific surface area (2,630m2·g-1), higher Young's modulus
(- 1.0TPa), higher inherence electron mobility (200,000cm2·v-1·s-1), thermal conductivity (5,000Wm-1·K-1), lead
Electrical and transparency (97.7%).The above-mentioned advantage of graphene so that it is widely used in multiple fields, as electrically conducting transparent is thin
Film, sensor, polymer composites, energy storage material, biological medicine, heat-conductive coating, anticorrosive paint etc..
Currently, the preparation method of graphene mainly has oxidation-reduction method, liquid phase stripping method, mechanical stripping method, vapor- phase synthesis
Method.Wherein, mechanical stripping method and gas phase synthesis method can prepare zero defect graphene film, but yield is extremely low.Oxidation-reduction method and
Liquid phase stripping method is the main method of current industrial production graphene powder.However greatly compare table since graphene powder has
Area is easily lumpd using common furnace drying method, is caused serious lamella to stack and reunite, is caused in later stage application process, stone
Black alkene is difficult to disperse；Freeze drying process energy consumption is big, efficiency is low.Further, since fluffy graphene powder density is extremely low, Workflow
It raises, brings inconvenience during packed and transported and use.
Invention content
The main purpose of the present invention is to provide a kind of graphene aqueous slurries and preparation method thereof, to overcome the prior art
Deficiency.
For realization aforementioned invention purpose, the technical solution adopted by the present invention includes：
An embodiment of the present invention provides a kind of graphene aqueous slurry, the graphene aqueous slurry includes aqueous liquid dispersion and divides
The grapheme material being dispersed in the aqueous liquid dispersion, wherein contain surfactant in the aqueous liquid dispersion；
Wherein, it is in terms of 100% by the gross mass of the graphene aqueous slurry, the mass percentage of the graphene is 0.2-
12%.
Preferably, the surface tension of the aqueous liquid dispersion is 40-50mN/m.
The embodiment of the present invention additionally provides the preparation method of the graphene aqueous slurry comprising：
Using oxidation graphite solid or expansible graphite solid as raw material, expansion process is carried out, expanded graphite is prepared；By the expansion
Graphite is soaked in infiltration in aqueous stripper and handles, and obtains the mixture containing expanded graphite；By the mixing containing expanded graphite
Object carries out high speed shear or ultrasonication, removes the aqueous stripper, obtains graphene wet feed；By the graphene wet feed
It is placed in aqueous liquid dispersion, carries out high speed shear processing, obtain graphene aqueous slurry.
Preferably, contain surfactant in the aqueous stripper and/or the aqueous liquid dispersion.
Preferably, the surface tension of the aqueous stripper and/or the aqueous liquid dispersion is 40-50mN/m.
Preferably, the surfactant be neopelex, polyvinylpyrrolidone, sodium lignin sulfonate,
Sodium taurocholate, stearic acid, tricresyl phosphate butyric acid, silane coupling agent, tetrabutylammonium bromide, sodium citrate, cetyl trimethyl bromination
Ammonium, polyoxyethylene laurel ether, Tween 80, triton X-100, dibutyltin oxide, Disperbyk-163, lysine, it is poly- between it is sub-
At least one of phenylethylene derivative, DsPE, polyvinyl alcohol.
Preferably, the expanded graphite is through high speed shear or ultrasonication, wherein the rotating speed of the high speed shear is
2000-40000rpm, shear time 10-400min；Or the ultrasonic power is 50-3000W, ultrasonic treatment time is
30-600min。
Preferably, the graphene wet feed is being placed in aqueous liquid dispersion after progress high speed shear processing, is further including ball
Mill, sand milling or ultrasonication, wherein the rotating speed of the ball-milling treatment is 100-1000rpm, Ball-milling Time 2-48h；With/
Or the rotating speed of the sanded treatment is 500-5000rpm, the sand milling time is 2-48h.
Compared with prior art, advantages of the present invention includes：
The preparation method of graphene aqueous slurry provided by the invention carries out oxidation graphite solid or expansible graphite solid swollen
After swollen processing, the expanded graphite of different expansion multiplying powers can be obtained, the expanded graphite is placed in the water that surface tension strictly controls
Property stripper in fully soak after, carrying out high speed shear or ul-trasonic irradiation, the surface tension of the aqueous stripper makes expansion
Nanoscale twins adequately dissociated and disperseed, to effectively prevent the accumulation and reunion of graphene sheet layer, improve stone
Dispersion performance when black alkene uses.After the high speed shear or ultrasonication, the graphene wet feed is dispersed in molten again
In agent, under the action of surfactant, through high speed shear, ball milling, sand milling or ul-trasonic irradiation, high concentration, size can be obtained
Controllable graphene aqueous slurry.The preparation method of graphene aqueous slurry of the present invention is simple for process, environmentally friendly, it can be achieved that the stone
It is prepared by the batch of black alkene aqueous slurry；And oxygen content and stripping dispersing technology by controlling raw material, the graphite can be controlled
The size of graphene in alkene aqueous slurry, to solve, graphene size is difficult to control, graphene powder is easily reunited, density is light, packet
Ship defeated difficult, difficult the problems such as disperseing.Graphene aqueous slurry prepared by the method for the present invention can be applied to conductive and heat-conductive coating, prevent
The fields such as rotten coating, battery/ultracapacitor.
Specific implementation mode
In view of deficiency in the prior art, inventor is able to propose the present invention's through studying for a long period of time and largely putting into practice
Technical solution.The technical solution, its implementation process and principle etc. will be further explained as follows.
The one side of the embodiment of the present invention provides a kind of graphene aqueous slurry, and the graphene aqueous slurry includes
Aqueous liquid dispersion and the grapheme material being dispersed in the aqueous liquid dispersion, wherein contain surface in the aqueous liquid dispersion
Activating agent.
As a preferred embodiment, it is in terms of 100% by the gross mass of the graphene aqueous slurry, the graphene
Mass percentage is 0.1-10%.Specifically, the mass percentage of the graphene can be 0.1%, 0.2%, 0.5%,
0.8%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%.Graphene-structured in the graphene aqueous slurry
Can be single-layer graphene or a small number of layer graphene microplates, but thickness is in Nano grade.
As another preferred embodiment, the surface tension of the aqueous liquid dispersion is 40-50mN/m.Suitable surface
Force value, it is ensured that the grapheme material is not reunited, to obtain the graphene aqueous slurry that dispersion is more uniformly distributed.
Graphene aqueous slurry provided in an embodiment of the present invention, the grapheme material are dispersed in the aqueous dispersion
In, and containing surfactant in the aqueous dispersion so that the grapheme material disperses more uniform, the graphene
Scantling is more controllable.
Correspondingly, also a kind of preparation method of graphene aqueous slurry of the embodiment of the present invention includes the following steps：
S01. using oxidation graphite solid or expansible graphite solid as raw material, expansion process is carried out, expanded graphite is prepared；
S02. the expanded graphite is soaked in infiltration in aqueous stripper to handle, obtains the mixture containing expanded graphite；
S03. by described, the mixture containing expanded graphite carries out high speed shear or ultrasonication, removes the stripper, obtains
Graphene wet feed；
S04. the graphene wet feed is placed in aqueous liquid dispersion, carries out high speed shear processing, obtains graphene aqueous slurry.
Specifically, in above-mentioned steps S01, the embodiment of the present invention uses oxidation graphite solid or expansible graphite solid conduct
Raw material.The selection of the oxidation graphite solid or expansible graphite solid is unrestricted, can voluntarily prepare or market purchase obtains
.Specifically, the graphite oxide can be used the Hummers methods of current relative maturity, Brodie methods, Staudenmaier methods or
Its modified technique is synthesized；The expansible graphite uses commercially available high purity product.
The oxygen content of graphite oxide raw material is higher, and specific surface area is bigger when expansion, finally removes obtained graphene product
Thinner, specific surface area is bigger, and slurry is more black；The preparation of graphite oxide generally uses Fine particle processing, and feed particles are to product
Performance influences little.As a particular preferred embodiment, the granular size of the graphite oxide is 200-1000 mesh, oxygen content
It is Strong oxdiative intercalation product for 30-50%.Similar with graphite oxide, expansible graphite oxygen content is higher, and product is thinner, compares table
Area is bigger, and paste color is deeper；The preparation of expansible graphite generally uses flaky graphite, and expansible graphite raw material ruler
It is very little that final products performance is influenced less.As another preferred embodiment, the granular size of the expansible graphite is 30-
200 mesh, oxygen content 5-15% are weak oxide intercalation product.Of course it is to be understood that raw material described in the embodiment of the present invention also may be used
With the moderate oxidation intercalation product prepared using similar expansible graphite synthesis technology, as particular preferred embodiment, institute
The oxygen content for stating moderate oxidation intercalation product is 15-30%.In the embodiment of the present invention, using different raw materials, it will obtain
The graphene aqueous slurry of different-thickness.
In the embodiment of the present invention, in order to obtain the preferable expanded graphite of expansion effect, the expansion process preferably uses height
Temperature expansion or microwave expansion are realized.As particular preferred embodiment, the temperature of the high-temperature expansion is 200-1100 DEG C, when expansion
Between be 3s-60s；Or the power of the microwave expansion is 500-2800W, Bulking Time 3-600s.
When relatively low because of expanded graphite specific surface area, peeling effect is poor, and more crystalline flake graphite piece is remained in product, influences to starch
The using effect of material.As a preferred embodiment, specific surface area of the raw material after the expansion process is not less than 20m2/g.
In above-mentioned steps S02, the addition of aqueous stripper described in the embodiment of the present invention can make the expanded graphite fill
It decomposes from and disperses, to effectively prevent the reunion of graphene sheet layer, and then improve dispersion performance when its use.The present invention is real
It applies in example, suitable surface tension value, it is ensured that the expanded graphite is in best stripping environment, preferable to obtain
Peeling effect, and then prevent the graphene subsequently obtained from reuniting.As a preferred embodiment, the aqueous stripper
Surface tension is 40-50mN/m.Further, in order to ensure it is described infiltration processing effect so that the expanded graphite is abundant
The content of dissociation, dispersion, the expanded graphite and the aqueous stripper is than there is stringent limitation.As a preferred embodiment, institute
The content ratio for stating expanded graphite and the aqueous stripper is 1g：(50-1000) ml, concretely 1g:50ml、1g:
100ml、1g:200ml、1g:300ml、1g:400ml、1g:500ml、1g:600ml、1g:700ml、1g:800ml、1g:
900ml、1g:1000ml。
The solvent of aqueous stripper described in the embodiment of the present invention can select organic solvent or inorganic solvent, the aqueous stripping
Chaotropic can be made of one or more solvents.As a preferred embodiment, in the aqueous stripper solvent be individually selected from from
Sub- water, ammonium hydroxide, formic acid, acetic acid, methanol, ethyl alcohol, glycerine, acetone, normal propyl alcohol, n-octyl alcohol, isooctanol, dimethyl sulfoxide, acetonitrile,
At least one of dimethylformamide, dioxane, tetrahydrofuran.
As particular preferred embodiment, in order to enable the aqueous stripper is in above-mentioned surface tension range, the water
Property stripper is optionally added surfactant.As particular preferred embodiment, the surface in the aqueous stripper is lived
Property agent be selected from neopelex, polyvinylpyrrolidone, sodium lignin sulfonate, sodium taurocholate, stearic acid, tricresyl phosphate fourth
Acid, silane coupling agent, tetrabutylammonium bromide, sodium citrate, cetyl trimethylammonium bromide, polyoxyethylene laurel ether, tween
80, triton X-100, dibutyltin oxide, Disperbyk-163, lysine, it is poly- between sub- phenylethylene derivative, DsPE,
At least one of DNA, polyvinyl alcohol.The dosage of the surfactant by the aqueous stripper solvent type and use
Amount determines, preferably makes the surface tension of the stripper in 40-50mN/m ranges.
Infiltration processing described in the embodiment of the present invention can preferably use stirring wetting to realize, further, the expansion stone
It is 0.5-4h that ink, which stirs in the aqueous stripper or impregnate infiltrating time,.
In above-mentioned steps S03, under conditions of above-mentioned aqueous stripper infiltration, especially surface tension is 40-50mN/m
Under conditions of, using the auxiliary of shearing dissociation or ultrasound dissociation, the quick dissociation of the expanded graphite, single prepares yield
Greatly, it can be achieved that expanded graphite quickly dissociates in 1 hour, meet industrial production demand.
Specifically, in the high speed shear or ultrasonication, power and splitting time are removed to graphene sheet layer size
It influences greatly, high power, prolonged stripping can obtain the aqueous slurry of the thin graphene of small size, lamella；On the contrary, low-power,
The stripping of short time can obtain the aqueous slurry of big size graphene.In the embodiment of the present invention, the high speed shear or ultrasonic wave
In processing, the rotating speed of the high speed shear is 2000-40000rpm, shear time 10-400min；Or the ultrasonic power
For 50-3000W, ultrasonic treatment time 10-600min.By adjusting the stripping of the high speed shear or ultrasonication
Power and splitting time can obtain the controllable graphene wet feed of size.
In the embodiment of the present invention, removes the aqueous stripper and obtain graphene wet feed, natural subsidence can be taken, centrifuged
Filter, air press filtration, the one or more of of vacuum filtration realize.
In above-mentioned steps S04, to obtain graphene aqueous slurry, need graphene filter cake wet feed in SO3 in a solvent
Again decentralized processing, the solvent is at least one of deionized water or absolute ethyl alcohol, further, to obtain high stable
Property graphene aqueous slurry, certain surfactant can be added into solvent, is particularly preferred as neopelex, poly-
Vinylpyrrolidone, sodium lignin sulfonate, sodium taurocholate, stearic acid, tricresyl phosphate butyric acid, silane coupling agent, tetrabutylammonium bromide, lemon
Lemon acid sodium, cetyl trimethylammonium bromide, polyoxyethylene laurel ether, Tween 80, triton X-100, dibutyltin oxide,
Disperbyk-163, lysine, at least one of sub- phenylethylene derivative, DsPE, DNA, polyvinyl alcohol between gathering.As
The surface tension of preferred embodiment, the aqueous liquid dispersion is 40-50mN/m, in favor of the dispersion of grapheme material.
By the graphene wet feed and aqueous liquid dispersion, high speed shear, ball milling, sand milling or ultrasonication are further carried out
Graphene microchip is set to be uniformly dispersed, when the rotating speed of the high speed shear, shear time, the ultrasonic power, ultrasonication
Between can refer to the parameter setting of above-mentioned steps S03, the rotating speed of the ball milling is 100-1000rpm, Ball-milling Time 2-48h；
The rotating speed of the sand milling is 500-5000rpm, and the sand milling time is 2-48h.
It is illustrated with reference to specific embodiment.
Embodiment 1
A kind of graphene aqueous slurry and preparation method thereof, includes the following steps：
S11. it takes 14g grain sizes for 80 mesh, the expansible graphite of oxygen content 10%, is carried out at expansion in 1000 DEG C of high-temperature expansion stoves
Reason, is prepared 10g expanded graphites；
S12. it is 15% ammonium hydroxide and mass concentration the expanded graphite to be soaked in percent by volume in the deionized water for be placed in 3L
Stirring moistening 1h, obtains the mixture containing expanded graphite in the mixing stripper formed for the n-octyl alcohol of 4 × 10-4kg/kg；
S13. by described, the mixture containing expanded graphite carries out 800W ul-trasonic irradiation 4h and obtains graphene after centrifugal filtration
Filter cake；
S14. the graphene filter cake is scattered in 190g deionized waters, PVP is added and adjusts surface tension in 40-50mN/m ranges
It is interior, 6h is sanded in nanometer sand mill, obtains the graphene aqueous slurry of weight percentage about 5%, wherein graphene is average
Lamella size is 1 μm.
Embodiment 2
A kind of graphene aqueous slurry and preparation method thereof, includes the following steps：
S21. it takes 14g grain sizes for 150 mesh, the expansible graphite of oxygen content 10%, expansion process is carried out in industrial microwave oven, is made
It is standby to obtain 10g expanded graphites；
S22. the expanded graphite is soaked in and is placed in that 1L percents by volume are 15% ammonium hydroxide and mass concentration is 4 × 10-4kg/
Stirring moistening 1h, obtains the mixture containing expanded graphite in the mixing stripper of the n-octyl alcohol composition of kg；
S23. by described, the mixture containing expanded graphite carries out 1000W ul-trasonic irradiation 3h and obtains graphene after vacuum filtration
Filter cake；
S24. the graphene filter cake is scattered in 90g absolute ethyl alcohols, sodium citrate is added and adjusts surface tension in 40-50mN/m
In range, decentralized processing 3h is sheared, obtains the ethyl alcohol slurry of the graphene of weight percentage about 10%, wherein graphene is average
Lamella size is 15 μm.
It should be appreciated that the technical concepts and features of above-described embodiment only to illustrate the invention, its object is to allow be familiar with this
The personage of item technology cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
According to equivalent change or modification made by spirit of the invention, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of graphene aqueous slurry, which is characterized in that the graphene aqueous slurry includes aqueous liquid dispersion and is dispersed in
Grapheme material in the aqueous liquid dispersion, wherein contain surfactant in the aqueous liquid dispersion；
Wherein, it is in terms of 100% by the gross mass of the graphene aqueous slurry, the mass percentage of the graphene is 0.2-
12%.
2. graphene aqueous slurry according to claim 1, which is characterized in that the surface tension of the aqueous liquid dispersion is
40-50mN/m。
3. the preparation method of graphene aqueous slurry as claimed in claim 1 or 2, it is characterised in that including：
Using oxidation graphite solid or expansible graphite solid as raw material, expansion process is carried out, expanded graphite is prepared；By the expansion
Graphite is soaked in infiltration in aqueous stripper and handles, and obtains the mixture containing expanded graphite；By the mixing containing expanded graphite
Object carries out high speed shear or ultrasonication, removes the aqueous stripper, obtains graphene wet feed；By the graphene wet feed
It is placed in aqueous liquid dispersion, carries out high speed shear processing, obtain graphene aqueous slurry.
4. the preparation method of graphene aqueous slurry according to claim 3, which is characterized in that the aqueous stripper
And/or contain surfactant in the aqueous liquid dispersion.
5. the preparation method of graphene aqueous slurry according to claim 4, which is characterized in that the aqueous stripper
And/or the surface tension of the aqueous liquid dispersion is 40-50mN/m.
6. the preparation method of graphene aqueous slurry according to claim 4, which is characterized in that the surfactant is
Neopelex, polyvinylpyrrolidone, sodium lignin sulfonate, sodium taurocholate, stearic acid, tricresyl phosphate butyric acid, silane are even
Connection agent, tetrabutylammonium bromide, sodium citrate, cetyl trimethylammonium bromide, polyoxyethylene laurel ether, Tween 80, Qula are logical
X100, dibutyltin oxide, Disperbyk-163, lysine, it is poly- between in sub- phenylethylene derivative, DsPE, polyvinyl alcohol
It is at least one.
7. the preparation method of graphene aqueous slurry according to claim 4, which is characterized in that the expanded graphite is through height
Speed shearing or ultrasonication, wherein the rotating speed of the high speed shear is 2000-40000rpm, shear time 10-
400min；Or the ultrasonic power is 50-3000W, ultrasonic treatment time 30-600min.
8. the preparation method of graphene aqueous slurry according to claim 4, which is characterized in that the graphene is wet
Material is placed in aqueous liquid dispersion after progress high speed shear processing, further includes ball milling, sand milling or ultrasonication, wherein the ball
The rotating speed of mill processing is 100-1000rpm, Ball-milling Time 2-48h；And/or the rotating speed of the sanded treatment is 500-
5000rpm, sand milling time are 2-48h.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109957309A (en) * | 2019-04-02 | 2019-07-02 | 河南城建学院 | A kind of graphene modified epoxy anticorrosive paint and preparation method thereof |
| CN110060818A (en) * | 2019-05-21 | 2019-07-26 | 郑州新世纪材料基因组工程研究院有限公司 | A kind of preparation method and application of low defect graphene conductive slurry |
| CN110078062A (en) * | 2019-05-22 | 2019-08-02 | 大同墨西科技有限责任公司 | A kind of graphene energetic catalytic physics strip preparation method |
| CN110698723A (en) * | 2019-11-12 | 2020-01-17 | 沈阳航空航天大学 | Multifunctional anti-fatigue graphene composite sponge and preparation method and application thereof |
| CN111620373A (en) * | 2020-05-21 | 2020-09-04 | 厦门虹鹭钨钼工业有限公司 | Batch production method of molybdenum disulfide nanosheet powder material |
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| CN111718623A (en) * | 2020-05-18 | 2020-09-29 | 上海帕吉索纳米技术有限公司 | Graphene aqueous slurry and preparation method thereof |
| CN113200538A (en) * | 2021-04-07 | 2021-08-03 | 北京化工大学 | Method for preparing graphene aqueous phase dispersion liquid through mechanical stripping and prepared graphene aqueous phase dispersion liquid |
| CN113555229A (en) * | 2020-04-26 | 2021-10-26 | 中天超容科技有限公司 | Graphene paper current collector, preparation method and supercapacitor |
| CN114162815A (en) * | 2020-09-10 | 2022-03-11 | 中国石油化工股份有限公司 | Expandable graphite material, preparation method and application thereof |
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| CN105110318A (en) * | 2015-07-23 | 2015-12-02 | 深圳市国创新能源研究院 | Graphene aqueous slurry, and preparation method thereof |
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| CN105110318A (en) * | 2015-07-23 | 2015-12-02 | 深圳市国创新能源研究院 | Graphene aqueous slurry, and preparation method thereof |
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| CN109957309A (en) * | 2019-04-02 | 2019-07-02 | 河南城建学院 | A kind of graphene modified epoxy anticorrosive paint and preparation method thereof |
| CN110060818A (en) * | 2019-05-21 | 2019-07-26 | 郑州新世纪材料基因组工程研究院有限公司 | A kind of preparation method and application of low defect graphene conductive slurry |
| CN110078062A (en) * | 2019-05-22 | 2019-08-02 | 大同墨西科技有限责任公司 | A kind of graphene energetic catalytic physics strip preparation method |
| CN110698723B (en) * | 2019-11-12 | 2022-02-11 | 沈阳航空航天大学 | Multifunctional anti-fatigue graphene composite sponge and preparation method and application thereof |
| CN110698723A (en) * | 2019-11-12 | 2020-01-17 | 沈阳航空航天大学 | Multifunctional anti-fatigue graphene composite sponge and preparation method and application thereof |
| CN113555229A (en) * | 2020-04-26 | 2021-10-26 | 中天超容科技有限公司 | Graphene paper current collector, preparation method and supercapacitor |
| CN113555229B (en) * | 2020-04-26 | 2023-04-21 | 中天超容科技有限公司 | Graphene paper current collector, preparation method and supercapacitor |
| CN111690283A (en) * | 2020-05-18 | 2020-09-22 | 上海帕吉索纳米技术有限公司 | High-concentration salt-spray-resistant graphene slurry and preparation method thereof |
| CN111718623A (en) * | 2020-05-18 | 2020-09-29 | 上海帕吉索纳米技术有限公司 | Graphene aqueous slurry and preparation method thereof |
| CN111620373A (en) * | 2020-05-21 | 2020-09-04 | 厦门虹鹭钨钼工业有限公司 | Batch production method of molybdenum disulfide nanosheet powder material |
| CN114162815A (en) * | 2020-09-10 | 2022-03-11 | 中国石油化工股份有限公司 | Expandable graphite material, preparation method and application thereof |
| CN114162815B (en) * | 2020-09-10 | 2023-03-10 | 中国石油化工股份有限公司 | Expandable graphite material, preparation method and application thereof |
| CN113200538A (en) * | 2021-04-07 | 2021-08-03 | 北京化工大学 | Method for preparing graphene aqueous phase dispersion liquid through mechanical stripping and prepared graphene aqueous phase dispersion liquid |
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