CN109802078A - A kind of soft graphite alkenyl composite polyimide material of membrane structure, preparation method and applications - Google Patents
A kind of soft graphite alkenyl composite polyimide material of membrane structure, preparation method and applications Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 65
- 239000002131 composite material Substances 0.000 title claims abstract description 54
- 239000004642 Polyimide Substances 0.000 title claims abstract description 50
- 229920001721 polyimide Polymers 0.000 title claims abstract description 50
- 239000012528 membrane Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 title abstract description 12
- 239000010439 graphite Substances 0.000 title abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 66
- 239000012299 nitrogen atmosphere Substances 0.000 claims abstract description 6
- 238000003763 carbonization Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 22
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 18
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 16
- 229910001416 lithium ion Inorganic materials 0.000 claims description 16
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- YTVNOVQHSGMMOV-UHFFFAOYSA-N naphthalenetetracarboxylic dianhydride Chemical compound C1=CC(C(=O)OC2=O)=C3C2=CC=C2C(=O)OC(=O)C1=C32 YTVNOVQHSGMMOV-UHFFFAOYSA-N 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 5
- 239000012298 atmosphere Substances 0.000 claims description 4
- 238000005119 centrifugation Methods 0.000 claims description 3
- 239000007774 positive electrode material Substances 0.000 claims description 2
- 238000004729 solvothermal method Methods 0.000 claims 3
- 238000000967 suction filtration Methods 0.000 claims 2
- 238000010000 carbonizing Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 13
- 239000002904 solvent Substances 0.000 abstract description 12
- 229920000642 polymer Polymers 0.000 abstract description 4
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 241000446313 Lamella Species 0.000 abstract 1
- 150000001721 carbon Chemical group 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000002356 single layer Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 9
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 description 8
- 239000007772 electrode material Substances 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
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- 238000002604 ultrasonography Methods 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 5
- -1 Graphite alkene Chemical class 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000010405 anode material Substances 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000006091 1,3-dioxolane group Chemical class 0.000 description 1
- OXHNLMTVIGZXSG-UHFFFAOYSA-N 1-Methylpyrrole Chemical compound CN1C=CC=C1 OXHNLMTVIGZXSG-UHFFFAOYSA-N 0.000 description 1
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 1
- 229910012652 LiCo1 Inorganic materials 0.000 description 1
- 229910032387 LiCoO2 Inorganic materials 0.000 description 1
- 229910052493 LiFePO4 Inorganic materials 0.000 description 1
- 229910003005 LiNiO2 Inorganic materials 0.000 description 1
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000012646 carbonyl polymerization Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
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- 150000004862 dioxolanes Chemical class 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
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- 125000005462 imide group Chemical group 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 description 1
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 229920002647 polyamide Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
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- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of soft graphite alkenyl composite polyimide materials of membrane structure, preparation method and applications.The present invention is using the graphene of single layer of carbon atom structure as skeleton carrier, by the method for solvent heat on graphene skeleton in-situ polymerization polyimide polymer, it is re-introduced into filter with graphene oxide similar in the graphene oxide quality reacted and form a film, membranaceous graphene-based polyimide composite film material is obtained by carbonization under nitrogen atmosphere.For the polyimides uniform load obtained by the method between graphene sheet layer, the addition of lamella graphene oxide not only increases the electric conductivity of composite material, also makes it have good flexibility.This method have simple process, mild condition, it is low in cost the advantages that.This method provides good experimental data and theories integration in the research of electrochemical field and application for graphene-polyimide material.
Description
Technical field
The invention belongs to material science and electrochemical technology field, specifically, are related to a kind of flexible stone of membrane structure
Mertenyl composite polyimide material, preparation method and applications.
Background technique
Increasingly prominent with energy and environment problem, New Energy Industry has obtained more and more attention.Hybrid power
Automobile and electric car industry development are rapid, and lithium ion battery is widely used as wherein important energy storage device.Lithium ion
Battery has energy density height, the advantages such as good cycle and memory-less effect, it is considered to be current most effective energy storage
One of mode.
Lithium ion battery is the energy storage device as composed by anode, cathode, diaphragm and electrolyte, and wherein electrode material is to determine
The key factor of its fixed performance.Common positive electrode is lithium ion inlaid scheme, such as LiCoO2,LiNiO2,
LiMn2O4LiCo1/3Ni1/3/Mn1/3O2LiFePO4Deng.But traditional positive electrode has lacking for volume expansion in lithiumation process
It falls into, so as to cause the crushing of material, leads to the loss for being broken and being in electrical contact.In recent years, in order to further explore new electrode material
Material, the preparation of organic electrode materials start the concern for causing people.Compared with inorganic electrode material, organic electrode materials are due to ring
The features such as border protection, structure diversity, oxidation-reduction stability and high theoretical capacity, low cost.Organic cathode material it is significant
Feature is exactly that lithium can carry out insertion and deintercalation by reversible redox reaction in organic matter.Therefore, in order to reduce electricity
Material dissolution in the electrolytic solution in pole simultaneously realizes quick dynamic performance, and constructing has the polymer electrode for stablizing high conductivity
It is the key that current research work.
Polyimides (PI) is a kind of important high molecular material, imide ring is usually contained on main chain, by organic two
Amine and organic diacid acid anhydride are prepared by melt-polycondensation or solution polycondensation hot imidization method.Polyimides (PI) is due to tool
There is the stable active carbonyl of conjugated structure and high potential, is gradually developed as lithium ion anode material.But it is as a kind of allusion quotation
The carbonyl polymerization object of type, lower specific capacity (< 300mAh g-1) limit it and further apply.Because polymer has structure
Multifarious feature, researchers generally use the method for structure design to improve its performance.
Graphene has unique two-dimension plane structure, electric conductivity is high, specific surface area as one of most typical carbon material
Greatly, and the controllable design feature of dimension.Therefore, using graphene as substrate, with active positive electrode material it is compound after pass through synergistic effect
The chemical property of electrode material can be effectively improved.On the one hand, the electric conductivity of composite material can be greatly improved；On the other hand,
When preparing binder electrode material, the addition of graphene can reduce binder shared specific gravity in the material, effectively improve
The content of electrode active material, to improve the whole volume of battery.
Summary of the invention
It is simple, membrane structure the purpose of the present invention is in view of the above shortcomings of the prior art, providing a kind of preparation method
Soft graphite alkenyl composite polyimide material, preparation method and applications.Preparation process of the present invention is simple, mild condition, at
This is cheap, and obtained polyimides uniform load has reversible between graphene sheet layer as anode material for lithium-ion batteries
The advantages that capacity is high, cycle performance and good rate capability.
In order to solve the above-mentioned technical problem, the invention adopts the following technical scheme:
The present invention provides a kind of preparation method of the soft graphite alkenyl composite polyimide material of membrane structure, including with
Lower step:
(1) naphthalenetetracarbacidic acidic dianhydride NTCDA and ethylenediamine are added to the N-Methyl pyrrolidone nmp solution of graphene oxide
Middle carry out solvent thermal reaction；
(2) it after solvent thermal reaction, is constantly centrifuged by the way that water is added in system, the N- methylpyrrole in displacement system
Alkanone NMP adds graphene oxide solution and filters film forming；
(3) step (2) are filtered the membrane material obtained to be carbonized under an inert atmosphere, obtains the Flexible graphene of membrane structure
Base composite polyimide material.
In above-mentioned steps (1), the N-Methyl pyrrolidone nmp solution of graphene oxide passes through in graphene oxide water solution
Middle addition N-Methyl pyrrolidone NMP centrifugation obtains；The concentration of the N-Methyl pyrrolidone nmp solution of graphene oxide be 2~
3mg/mL。
In above-mentioned steps (1), the mass ratio of naphthalenetetracarbacidic acidic dianhydride NTCDA, ethylenediamine and graphene oxide are (2~4): (4
~8): 1.
In above-mentioned steps (1), the temperature of solvent thermal reaction is 150-200 DEG C, and the reaction time is 15-24 hours.
In above-mentioned steps (2), first the material that centrifugation is replaced into aqueous solution is added in bottle, adds the oxygen of 5-15mg
Graphite alkene solution after sonic oscillation is uniform, using sand core filter tunnel, pumps moisture therein, can obtain one it is membranaceous
The composite material of structure.
In above-mentioned steps (3), inert atmosphere is nitrogen atmosphere；Carburizing temperature is 200-400 DEG C, and carbonization time is that 5-10 is small
When.
The present invention also provides a kind of soft graphite alkenyl polyamides of membrane structure according to made from above-mentioned preparation method is sub-
Amine composite material.
The present invention compared with the existing technology, has the following advantages and beneficial effects:
1, the present invention prepares the graphene-based composite polyimide material of membrane structure, solvent heat by the method for solvent heat
In the process, polyimides graphene skeleton surface homogeneous polymerization in situ can a step complete, method is easy, and carbon layers having thicknesses can
It adjusts.
2, the present invention prepares composite material by the polymer precursor of carbon source, polyimides as carbon-coating of graphene, former
Expect designability, it is low in cost；
3, it joined the graphene oxide of stratiform in the present invention, so that the material formed has the appearance structure of film-form,
There is mechanical flexibility well compared with material in the prior art.
4, the soft graphite alkenyl composite polyimide material of the membrane structure prepared by the present invention is as lithium ion battery
Anode has high reversible capacity, extraordinary cyclical stability and high rate performance, it is shown that excellent chemical property,
30mA·g-1Charging or discharging current under, capacity can reach 198mAhg-1, in 4Ag-1Lower capacity is 103mAhg-1It is excellent
High rate performance, in 1Ag-1Under 2000 times circulation after capacity retention ratio be more than 74% overlength cycle life.Of the invention
The graphene-based composite polyimide material that method is prepared is with a wide range of applications in rechargeable battery field.
Detailed description of the invention
Fig. 1 is the shape appearance figure for the soft graphite alkenyl composite polyimide material that embodiment 1 obtains membrane structure.
Fig. 2 is that embodiment 1 obtains the soft graphite alkenyl composite polyimide material of membrane structure as lithium ion battery
The cycle performance figure of positive electrode.
Fig. 3 is that embodiment 1 obtains the soft graphite alkenyl composite polyimide material of membrane structure as lithium ion battery
The high rate performance figure of positive electrode.
Fig. 4 is that embodiment 1 obtains the soft graphite alkenyl composite polyimide material of membrane structure as lithium ion battery
The long circulating performance map of positive electrode.
Specific embodiment
The following examples can make those skilled in the art that the present invention be more fully understood, but not limit in any form
The present invention.
Embodiment 1
The first step prepares graphene-based composite polyimide material (G@PI):
(1) by N-Methyl pyrrolidone solution (5mL) ultrasound of 2mg/mL graphene oxide, uniformly mixed dispersion is formed
Liquid；
(2) naphthalenetetracarbacidic acidic dianhydride is added in Xiang Shangshu dispersion liquid, is vigorously stirred half an hour；Wherein, the naphthalene tetramethyl of addition
Acid dianhydride: ethylenediamine: the quality amount ratio of graphene oxide is 4:8:1.
(3) ethylenediamine that 890 μ L concentration are 10.56mg/mL is added in the above solution, will be mixed after being vigorously stirred half an hour
It closes liquid to pour into glass-lined, carries out solvent thermal reaction, reaction temperature is 200 DEG C, and the reaction time is 24 hours.
Second step prepares the graphene-based composite polyimide material of membrane structure (G@PI/RGO):
(1) composite material that solvent heat obtains constantly is centrifuged by the way that deionized water is added, the NMP replaced in material is molten
Liquid obtains the graphene-based composite polyimide material (G@PI) of aqueous solution, and adding 10mg graphene oxide solution, (concentration is
2mg/mL), deionized water is added to 20mL, sonic oscillation is uniform.
(2) material that ultrasound finishes is poured into sand core suction funnel, filter membrane is polypropylene microporous filter membrane (aperture Φ
0.22 μm), the graphene-based composite polyimide material (G@PI/RGO) of membrane structure is obtained by filtering, membrane structure is answered
Condensation material has extraordinary mechanical flexibility, and due to joined graphene oxide, so electric conductivity obtains well.
(3) film material is put into tube furnace in nitrogen atmosphere and carries out high temperature cabonization, 300 DEG C of temperature holdings 8 are small
When, finally obtain the graphene-based composite polyimide material (G@PI/RGO) of membrane structure.
(4) scanning electron microscope (SEM) map of the membranaceous graphene-based composite polyimide material is as illustrated in figures la-c.By institute
Composite material (G@PI/RGO) is obtained as anode material for lithium-ion batteries and is assembled into the button-shaped half-cell of lithium ion, uses pour lithium slice
As to electrode.1M LiTFSI is dissolved in 1,3- dioxolanes (DOL)/glycol dimethyl ether (DME) (volume ratio 1:1)
Mixed solution in be formulated as electrolyte, utilize button-shaped half-cell carry out electro-chemical test, cycle performance figure, high rate performance
Figure and long circulating figure difference are as shown in Figure 2,3, 4.
Embodiment 2
The first step prepares graphene-based composite polyimide material (G@PI):
(1) by N-Methyl pyrrolidone solution (5mL) ultrasound of 2mg/mL graphene oxide, uniformly mixed dispersion is formed
Liquid；
(2) naphthalenetetracarbacidic acidic dianhydride is added in Xiang Shangshu dispersion liquid, is vigorously stirred half an hour；Wherein, the naphthalene tetramethyl of addition
Acid dianhydride: ethylenediamine: the quality amount ratio of graphene oxide is 2:4:1.
(3) ethylenediamine that 450 μ L concentration are 10.56mg/mL is added in the above solution, will be mixed after being vigorously stirred half an hour
It closes liquid to pour into glass-lined, carries out solvent thermal reaction, reaction temperature is 200 DEG C, and the reaction time is 24 hours.
Second step prepares the graphene-based composite polyimide material of membrane structure (G@PI/RGO):
(1) composite material that solvent heat obtains constantly is centrifuged by the way that deionized water is added, the NMP replaced in material is molten
Liquid obtains the graphene-based composite polyimide material (G@PI) of aqueous solution, and adding 10mg graphene oxide solution, (concentration is
2mg/mL), deionized water is added to 20mL, sonic oscillation is uniform.
(2) material that ultrasound finishes is poured into sand core suction funnel, filter membrane is polypropylene microporous filter membrane (aperture Φ
0.22 μm), the graphene-based composite polyimide material (G@PI/RGO) of membrane structure is obtained by filtering, membrane structure is answered
Condensation material has extraordinary mechanical flexibility, and due to joined graphene oxide, so electric conductivity obtains well.
(3) film material is put into tube furnace in nitrogen atmosphere and carries out high temperature cabonization, 300 DEG C of temperature holdings 8 are small
When, finally obtain the graphene-based composite polyimide material (G@PI/RGO) of membrane structure.
Embodiment 3
The first step prepares graphene-based composite polyimide material (G@PI):
(1) by N-Methyl pyrrolidone solution (5mL) ultrasound of 2mg/mL graphene oxide, uniformly mixed dispersion is formed
Liquid；
(2) naphthalenetetracarbacidic acidic dianhydride is added in Xiang Shangshu dispersion liquid, is vigorously stirred half an hour；Wherein, the naphthalene tetramethyl of addition
Acid dianhydride: ethylenediamine: the quality amount ratio of graphene oxide is 3:6:1.
(3) ethylenediamine that 670 μ L concentration are 10.56mg/mL is added in the above solution, will be mixed after being vigorously stirred half an hour
It closes liquid to pour into glass-lined, carries out solvent thermal reaction, reaction temperature is 200 DEG C, and the reaction time is 24 hours.
Second step prepares the graphene-based composite polyimide material of membrane structure (G@PI/RGO):
(1) composite material that solvent heat obtains constantly is centrifuged by the way that deionized water is added, the NMP replaced in material is molten
Liquid obtains the graphene-based composite polyimide material (G@PI) of aqueous solution, and adding 10mg graphene oxide solution, (concentration is
2mg/mL), deionized water is added to 20mL, sonic oscillation is uniform.
(2) material that ultrasound finishes is poured into sand core suction funnel, filter membrane is polypropylene microporous filter membrane (aperture Φ
0.22 μm), the graphene-based composite polyimide material (G@PI/RGO) of membrane structure is obtained by filtering, membrane structure is answered
Condensation material has extraordinary mechanical flexibility, and due to joined graphene oxide, so electric conductivity obtains well.
(3) film material is put into tube furnace in nitrogen atmosphere and carries out high temperature cabonization, 300 DEG C of temperature holdings 8 are small
When, finally obtain the graphene-based composite polyimide material (G@PI/RGO) of membrane structure.
As shown in Figure 1 to 4: Fig. 1 a is the graphene-based composite polyimide material of membrane structure that example 1 is prepared
The cross-sectional scans Electronic Speculum map of (G PI/RGO), it can be seen that the composite material shows the stacked structure of stratiform.Fig. 1 b is
The practical finished figure of membranaceous composite material is prepared in example 1, it can be seen that the material is very thin membrane structure.Fig. 1 c is
The effect picture of the material that example 1 is prepared in a flexed condition according, it can be seen that the composite material shows very excellent machine
Tool flexibility.Fig. 2 is that the graphene-based composite polyimide material (G@PI) that example 1 is prepared and membrane structure are graphene-based
The lithium ion battery constant current cycle curve comparison figure of composite polyimide material (G@PI/RGO), it can be seen that membrane structure is answered
Condensation material has very high reversible capacity (the 198mA h g1 at 30mA g1), and efficiency keeps very high.Fig. 3 is example 1
The graphene-based composite polyimide material (G@PI) and the graphene-based composite polyimide material of membrane structure (G@being prepared
PI/RGO lithium ion battery high rate performance curve comparison figure), it can be seen that the graphene-based polyimides composite wood of membrane structure
(G@PI/RGO) is expected under different current densities, which shows extremely excellent high rate performance.Fig. 4 is the system of example 1
The lithium ion battery long circulating performance curve of the standby obtained graphene-based composite polyimide material of membrane structure (G@PI/RGO),
It can be seen that the material still has very high efficiency and specific volume under the current density of 1000mA g1 after 2500 circle of circulation
Amount.
Claims (7)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111086980A (en) * | 2019-12-16 | 2020-05-01 | 上海应用技术大学 | A temperature-responsive graphene-based organic composite material and its preparation and application |
| CN111446448A (en) * | 2020-03-09 | 2020-07-24 | 武汉理工大学 | Preparation method of polyimide/graphene composite lithium ion battery cathode material based on conjugated carbonyl |
| CN114300681A (en) * | 2021-12-31 | 2022-04-08 | 齐鲁工业大学 | A kind of graphene composite polyimide electrode material and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086980A (en) * | 2019-12-16 | 2020-05-01 | 上海应用技术大学 | A temperature-responsive graphene-based organic composite material and its preparation and application |
| CN111446448A (en) * | 2020-03-09 | 2020-07-24 | 武汉理工大学 | Preparation method of polyimide/graphene composite lithium ion battery cathode material based on conjugated carbonyl |
| CN114300681A (en) * | 2021-12-31 | 2022-04-08 | 齐鲁工业大学 | A kind of graphene composite polyimide electrode material and preparation method thereof |
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Application publication date: 20190524 |