CN115124673A - PEG (polyethylene glycol) chain modified covalent organic framework membrane, preparation method and application thereof - Google Patents
PEG (polyethylene glycol) chain modified covalent organic framework membrane, preparation method and application thereof Download PDFInfo
- Publication number
- CN115124673A CN115124673A CN202210822182.5A CN202210822182A CN115124673A CN 115124673 A CN115124673 A CN 115124673A CN 202210822182 A CN202210822182 A CN 202210822182A CN 115124673 A CN115124673 A CN 115124673A
- Authority
- CN
- China
- Prior art keywords
- organic framework
- covalent organic
- peg chain
- electrolyte
- chain modified
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000013310 covalent-organic framework Substances 0.000 title claims abstract description 49
- 239000012528 membrane Substances 0.000 title claims abstract description 18
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000002202 Polyethylene glycol Substances 0.000 title description 28
- 229920001223 polyethylene glycol Polymers 0.000 title description 28
- 125000003827 glycol group Chemical group 0.000 title description 3
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 239000011245 gel electrolyte Substances 0.000 claims abstract description 15
- -1 amino compound Chemical class 0.000 claims abstract description 10
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims abstract 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 59
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 48
- 239000000243 solution Substances 0.000 claims description 38
- 239000012074 organic phase Substances 0.000 claims description 15
- 239000008346 aqueous phase Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 239000012046 mixed solvent Substances 0.000 claims description 6
- 229910013553 LiNO Inorganic materials 0.000 claims description 5
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 claims description 3
- 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 claims description 3
- 239000012071 phase Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 125000003277 amino group Chemical group 0.000 abstract description 2
- 150000001299 aldehydes Chemical class 0.000 description 15
- 239000007788 liquid Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 239000007784 solid electrolyte Substances 0.000 description 6
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 229940125904 compound 1 Drugs 0.000 description 5
- 238000012695 Interfacial polymerization Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000012043 crude product Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000499 gel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000012044 organic layer Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 239000005518 polymer electrolyte Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010898 silica gel chromatography Methods 0.000 description 3
- PHDIJLFSKNMCMI-ITGJKDDRSA-N (3R,4S,5R,6R)-6-(hydroxymethyl)-4-(8-quinolin-6-yloxyoctoxy)oxane-2,3,5-triol Chemical compound OC[C@@H]1[C@H]([C@@H]([C@H](C(O1)O)O)OCCCCCCCCOC=1C=C2C=CC=NC2=CC=1)O PHDIJLFSKNMCMI-ITGJKDDRSA-N 0.000 description 2
- JNPGUXGVLNJQSQ-BGGMYYEUSA-M (e,3r,5s)-7-[4-(4-fluorophenyl)-1,2-di(propan-2-yl)pyrrol-3-yl]-3,5-dihydroxyhept-6-enoate Chemical compound CC(C)N1C(C(C)C)=C(\C=C\[C@@H](O)C[C@@H](O)CC([O-])=O)C(C=2C=CC(F)=CC=2)=C1 JNPGUXGVLNJQSQ-BGGMYYEUSA-M 0.000 description 2
- YYROPELSRYBVMQ-UHFFFAOYSA-N 4-toluenesulfonyl chloride Chemical compound CC1=CC=C(S(Cl)(=O)=O)C=C1 YYROPELSRYBVMQ-UHFFFAOYSA-N 0.000 description 2
- HIHOEGPXVVKJPP-JTQLQIEISA-N 5-fluoro-2-[[(1s)-1-(5-fluoropyridin-2-yl)ethyl]amino]-6-[(5-methyl-1h-pyrazol-3-yl)amino]pyridine-3-carbonitrile Chemical compound N([C@@H](C)C=1N=CC(F)=CC=1)C(C(=CC=1F)C#N)=NC=1NC=1C=C(C)NN=1 HIHOEGPXVVKJPP-JTQLQIEISA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- UORVGPXVDQYIDP-UHFFFAOYSA-N borane Chemical compound B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000001757 thermogravimetry curve Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HBENZIXOGRCSQN-VQWWACLZSA-N (1S,2S,6R,14R,15R,16R)-5-(cyclopropylmethyl)-16-[(2S)-2-hydroxy-3,3-dimethylpentan-2-yl]-15-methoxy-13-oxa-5-azahexacyclo[13.2.2.12,8.01,6.02,14.012,20]icosa-8(20),9,11-trien-11-ol Chemical compound N1([C@@H]2CC=3C4=C(C(=CC=3)O)O[C@H]3[C@@]5(OC)CC[C@@]2([C@@]43CC1)C[C@@H]5[C@](C)(O)C(C)(C)CC)CC1CC1 HBENZIXOGRCSQN-VQWWACLZSA-N 0.000 description 1
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- VAVHMEQFYYBAPR-ITWZMISCSA-N (e,3r,5s)-7-[4-(4-fluorophenyl)-1-phenyl-2-propan-2-ylpyrrol-3-yl]-3,5-dihydroxyhept-6-enoic acid Chemical compound CC(C)C1=C(\C=C\[C@@H](O)C[C@@H](O)CC(O)=O)C(C=2C=CC(F)=CC=2)=CN1C1=CC=CC=C1 VAVHMEQFYYBAPR-ITWZMISCSA-N 0.000 description 1
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 1
- 208000032953 Device battery issue Diseases 0.000 description 1
- 239000002262 Schiff base Substances 0.000 description 1
- 150000004753 Schiff bases Chemical class 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 239000005703 Trimethylamine hydrochloride Substances 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004440 column chromatography Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 235000019439 ethyl acetate Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- JFOZKMSJYSPYLN-QHCPKHFHSA-N lifitegrast Chemical compound CS(=O)(=O)C1=CC=CC(C[C@H](NC(=O)C=2C(=C3CCN(CC3=CC=2Cl)C(=O)C=2C=C3OC=CC3=CC=2)Cl)C(O)=O)=C1 JFOZKMSJYSPYLN-QHCPKHFHSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- GVOISEJVFFIGQE-YCZSINBZSA-N n-[(1r,2s,5r)-5-[methyl(propan-2-yl)amino]-2-[(3s)-2-oxo-3-[[6-(trifluoromethyl)quinazolin-4-yl]amino]pyrrolidin-1-yl]cyclohexyl]acetamide Chemical compound CC(=O)N[C@@H]1C[C@H](N(C)C(C)C)CC[C@@H]1N1C(=O)[C@@H](NC=2C3=CC(=CC=C3N=CN=2)C(F)(F)F)CC1 GVOISEJVFFIGQE-YCZSINBZSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000013384 organic framework Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical class [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- SZYJELPVAFJOGJ-UHFFFAOYSA-N trimethylamine hydrochloride Chemical compound Cl.CN(C)C SZYJELPVAFJOGJ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G12/00—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08G12/02—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes
- C08G12/04—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
Abstract
The invention discloses a PEG chain modified covalent organic framework membrane, a preparation method and application thereof. The covalent organic framework membrane is a hexagonal topological structure synthesized by connecting three aldehydes in trimesic aldehyde and two amino groups of an amino compound modified by a PEG chain to form a-C ═ N-NH covalent bond. The PEG chain modified covalent organic framework film can be used as a gel electrolyte to be applied to a battery after being soaked by electrolyte, and the assembled battery has good rate performance and stable battery cycle performance.
Description
Technical Field
The invention belongs to the field of covalent organic framework compounds, and relates to a PEG (polyethylene glycol) chain modified covalent organic framework membrane, a preparation method and application thereof in gel electrolyte.
Background
Commercial lithium ion batteries have potential safety hazards of explosion due to the use of a large amount of flammable organic solvents. The solid electrolyte has the characteristic of high safety, and can effectively inhibit the growth of lithium dendrites, so that the energy density of the lithium ion battery is improved. Solid electrolytes are classified into all-solid electrolytes and quasi-solid electrolytes, which are also called gel electrolytes. Existing gel electrolytes include: composite gel polymer electrolytes, porous colloidal polymer electrolytes, other colloidal polymer electrolytes. Most of the existing gel electrolytes are based on macromolecular compounds. For example, document 1 reports a PEG/DME-containing safe PVDF-HFP-based gel electrolyte having a lithium ion conductivity of 3.4X 10 -4 S cm -1 (chem. Mater.2021,33, 8812-8821). The covalent organic framework is a novel long-range ordered high molecular polymer material formed by connecting light elements (C, N, O, S) and the like through covalent bonds, and has the characteristics of low weight density, high permanent porosity, large specific surface area, predesigned structure, high stability and the like. Traditional solid electrolyte based on covalent organic framework needs to be manufactured by tabletting covalent organic framework powder, which can cause uneven components, poor high-temperature stability, easy loss of effective components, battery failure and short circuit and the like. Compared with powdery covalent organic framework materials, the covalent organic framework material has more excellent performance.
At present, the application of the solid electrolyte based on the covalent organic framework membrane material is less reported, and the conductivity and the electrochemical performance are not ideal. Document 2 reports a method of incorporating polyethylene glycol (PEG) into a covalent organic skeleton to accelerate Li + The conduction strategy is that the prepared COF powder and low molecular weight PEG are doped together, the mixture is uniformly mixed by using a physical grinding method to obtain the PEG-doped COF powder, then the PEG-doped COF powder is soaked in lithium battery electrolyte to obtain the COF powder doped with PEG and lithium salt, and the ion conduction performance of the COF powder reaches 1.78 multiplied by 10 at 120 DEG C –3 S cm –1 And is cyclically stableThe performance is poor (am. chem. Soc.2019,141, 1923-1927.).
Disclosure of Invention
The invention aims to provide a PEG chain modified covalent organic framework membrane, a preparation method and application thereof in gel electrolyte.
The technical scheme for realizing the purpose of the invention is as follows:
PEG chain modified covalent organic framework film, which is composed of three aldehydes in trimesic aldehyde and PEG chain modified amino compound ([ PEG-n, n-NHNH) 2 (n＝1,2)]) The two amine groups are connected to form a hexagonal topological structure synthesized by covalent bond of-C ═ N-NH, and the structural formula is as follows:
the structural formula of the PEG chain modified amino compound is as follows:
The structural formula of the trimesic aldehyde provided by the invention is as follows:
the preparation method of the PEG chain modified covalent organic framework membrane comprises the following steps:
according to the mole ratio of the trimesic aldehyde to the PEG chain modified amino compound of 2:3, dissolving the trimesic aldehyde in dichloromethane to form an organic phase solution, dissolving the PEG chain modified amino compound in an acetic acid aqueous solution to form an aqueous phase solution, slowly dripping the aqueous phase solution on the top of the organic phase solution, carrying out two-phase interface polymerization film-forming reaction at room temperature, reacting for 1-5 days, and washing to obtain the covalent organic framework film.
Preferably, the concentration of the trimesic aldehyde in the dichloromethane is 0.01-0.3 mol/L.
Preferably, the concentration of the PEG chain modified amino compound in the acetic acid aqueous solution is 0.01-0.3 mol/L.
Preferably, the concentration of acetic acid in the acetic acid aqueous solution is 1-15 mol/L.
Preferably, the volume ratio of the aqueous phase solution to the organic phase solution is 1: 1-1: 10.
Preferably, the washing is carried out with dichloromethane and for 12 h.
The gel electrolyte based on the PEG chain modified covalent organic framework membrane is prepared by mixing the PEG chain modified covalent organic framework membrane with electrolyte and standing for more than 24 hours.
The electrolyte of the present invention is an electrolyte conventionally used in the art, such as 0.5M LiCF 3 SO 3 Solution, 0.5M LiNO 3 An electrolyte formed by dissolving DME/DOL mixed solvent with the volume ratio of 1:1, 1.0M LiTFSI and 1.0 percent LiNO 3 An electrolyte solution formed by dissolving DME/DOL mixed solvent with the volume ratio of 1:1 and 1.0M LiPF 6 And 1.0% VC in an EC/DMC/DEC mixed solvent at a volume ratio of 1:1: 1.
The application of the gel electrolyte based on the PEG chain modified covalent organic framework membrane in a battery.
The battery of the invention can be a sodium battery, a lithium battery and the like.
Compared with the prior art, the invention has the following advantages:
according to the invention, the rapid and simple preparation of the covalent organic framework film is realized through the interfacial polymerization reaction, the PEG side chain is modified in the holes of the covalent organic framework, so that the covalent organic framework film is gelatinized, the structural stability of the covalent organic framework film is improved, lithium salt and polyethylene glycol which are filled in the structure can be well locked, and when the covalent organic framework film is used as a gel electrolyte, the cycle stability and the rate capability of a battery formed by the covalent organic framework film can be obviously enhanced. The PEG chain modified covalent organic framework film is used as a gel electrolyte to assemble a lithium battery, has excellent capacity retention rate after 35 cycles of circulation, and can be stably circulated; and when the multiplying power is increased from 0.1C to 1C, the charging and discharging specific capacity is kept at about 90%, and when the multiplying power is returned from a high multiplying power to a low multiplying power, the charging and discharging specific capacity is kept at 99%, so that excellent cycling stability and multiplying power performance are shown.
Drawings
FIG. 1 is a pictorial representation of (a) COF-B-1 and (B) COF-B-2;
FIG. 2 is an XRD of (a) COF-B-1 and (B) COF-B-2;
FIG. 3 is an infrared diagram of COF-B-2 films and COF-B-1 films;
FIG. 4 is a TGA curve for COF-B-2 films and COF-B-1 films;
FIG. 5 is an SEM picture of a COF-B-1 film;
FIG. 6 is an SEM picture of a COF-B-2 film;
FIG. 7 is a charge-discharge curve of a button cell assembled by (a) a COF-B-1 film and (B) a COF-B-2 film as an electrolyte;
fig. 8 is a graph of cyclic specific capacity of LFP i COF-B-n (n 1,2) i Li;
fig. 9 is a diagram of the rate performance of LFP COF-B-n (n is 1,2) Li.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. To make various changes and modifications within the scope of the present invention.
PEG-n, n-NHNH of the invention 2 (n-1, 2) reference (ACS Appl. energy Mater.2021,4,10, 11720-11725) with PEG-2,2-NHNH 2 For example, the specific synthetic route is as follows:
the method comprises the following specific steps:
(1) compound 1 c: 4.97g NaH was added to the Schlenk bottle, which was then pumped with N 2 3 times, then compound 1a (5g, 40mmol), ultra dry THF (70mL) and compound 1b (9.14g, 120mmol) were added, slowly stirred at 0 ℃ for 15 min, then stirred at 65 ℃Stirring and reacting for 24 hours. After the reaction was completed, the reaction solution was quenched with water and extracted with dichloromethane. The organic phase was dried over anhydrous sodium sulfate, concentrated in vacuo, and subjected to silica gel column chromatography to give compound 1c (7g, 86%) as a colorless liquid.
(2) Compound 1 d: dried THF (60mL) and compound 1c (6.13g, 30mmol) were charged to a three-neck flask flushed with nitrogen. Then 30mL of a solution of 1M borane in THF was slowly added to the flask at 0 deg.C and stirred for 2 hours. After completion of the reaction, the reaction was quenched with 3M aqueous sodium hydroxide and stirred for 15 minutes. Then, 30% hydrogen peroxide (22.81mL) was added and the mixture was stirred at room temperature for another 40 minutes. The reaction mixture was quenched with saturated potassium carbonate solution and extracted with dichloromethane. The organic layer was dried over anhydrous sodium sulfate and concentrated under vacuum. The obtained liquid was passed through a silica gel column to obtain compound 1d (4.8g, 72%) as a crude colorless liquid.
(3) Compound 1 e: TsCl (4.38g, 23mmol), trimethylamine hydrochloride (1.91g, 20mmol) were added to a solution of crude compound 1d (4.44g, 20mmol) in DCM under a nitrogen atmosphere. TEA (4.05g, 40mmol) was then added slowly and the reaction stirred at room temperature for 24 hours, then quenched with saturated sodium bicarbonate solution and extracted with dichloromethane. The organic layer was dried over anhydrous sodium sulfate and concentrated in vacuo. The crude product was purified by silica gel chromatography (DCM) to give compound 1e (4.2g, 56%) as a colourless liquid.
(4) Compound 1 g: compound 1f (1.4g, 5mmol), potassium carbonate (1.52g, 11mmol) were added to N 2 To an ultra-dry MeCN solution under an atmosphere, compound 1e (3.96g, 11mmol) was added and then refluxed at 90 ℃ for 18 hours. The product was rotary dried, extracted with dichloromethane, the organic layer dried over anhydrous sodium sulfate, concentrated in vacuo and the crude product purified by silica gel chromatography (EtOAc) to give 1g (1.8g, 50%) of the compound as a brown liquid.
(5) Compound 1 h: 1.32g (2mmol) of the compound 1g was dissolved in 15mL of ethanol and 2mL of hydrazine hydrate, followed by heating to 90 ℃ for reaction. After the reaction was complete, the mixture was stirred and heated to reflux for 18 hours. The crude product was extracted with dichloromethane and the organic layer was dried over anhydrous sodium sulfate and concentrated in vacuo. The crude product was purified by column chromatography (DCM:MeOH 95: 5) purifying to obtain colorless liquid compound 1h, i.e. PEG-2,2-NHNH 2 (1.1g，86.7％)。
Example 1
The PEG chain modified covalent organic framework film (COF-B-2) is prepared from trimesic aldehyde and PEG-2,2-NHNH 2 The structure of the organic framework formed by Schiff base reaction is as follows:
PEG-2,2-NHNH 2 the structure of (a) is as follows:
the preparation method of COF-B-2 comprises the following synthetic route:
the method comprises the following specific steps:
weighing 0.04mmol of trimesic aldehyde and 0.06mmol of PEG-2,2-NHNH 2 Respectively adding trimesic aldehyde into 10mL of dichloromethane solvent, dispersing and dissolving the raw materials by ultrasound to form an organic phase solution, and adding PEG-2,2-NHNH 2 Added to 8mL of a 1mol/L aqueous acetic acid solution, and ultrasonically dispersed into an aqueous phase solution. Slowly dropping the aqueous phase solution with lower density into the organic phase solution in a 20mL cylindrical container, sealing the container mouth to prevent pollution and volatilization of liquid, carrying out interfacial polymerization for 5 days to obtain a covalent organic framework film, putting the obtained film into a culture dish, and washing with DCM for 3 times to obtain the covalent organic framework film COF-B-2.
Example 2
This example is substantially the same as example 1, except that the acetic acid concentration of the acetic acid aqueous solution used is 3mol/L, specifically:
weighing 0.04mmol of trimesic aldehyde and 0.0 mmol of trimesic aldehyde6mmol PEG-2,2-NHNH 2 Respectively adding trimesic aldehyde into 10mL of dichloromethane solvent, dispersing and dissolving the raw materials by ultrasound to form an organic phase solution, and adding PEG-2,2-NHNH 2 The resulting mixture was added to 8mL of a 3mol/L aqueous acetic acid solution, and the mixture was ultrasonically dispersed into an aqueous solution. In a 20mL cylindrical container, the aqueous phase solution with lower density is slowly dripped into the organic phase solution, then the container mouth is sealed to prevent pollution and volatilization of liquid, the interfacial polymerization lasts for 3 days to obtain the covalent organic framework film, the obtained film is put into a petri dish and washed 3 times by DCM to obtain the covalent organic framework film COF-B-2.
Example 3
This example is substantially the same as example 1, except that the acetic acid concentration of the acetic acid aqueous solution used is 6mol/L, specifically:
weighing 0.04mmol of trimesic aldehyde and 0.06mmol of PEG-2,2-NHNH 2 Respectively adding trimesic aldehyde into 10mL of dichloromethane solvent, dispersing and dissolving the raw materials by ultrasound to form an organic phase solution, and adding PEG-2,2-NHNH 2 The resulting mixture was added to 8mL of a 6mol/L aqueous acetic acid solution, and the mixture was ultrasonically dispersed into an aqueous solution. Slowly dripping the aqueous phase solution with lower density into the organic phase solution in a 20mL cylindrical container, sealing the container mouth to prevent pollution and volatilization of liquid, obtaining the covalent organic framework film after the interfacial polymerization lasts for 1 day, putting the obtained film into a petri dish, and washing 3 times with DCM to obtain the covalent organic framework film COF-B-2.
Example 4
This example is essentially the same as example 1, except that the amine-based compound modified with a PEG chain is PEG-1,1-NHNH 2 The method specifically comprises the following steps:
weighing 0.04mmol of trimesic aldehyde and 0.06mmol of PEG-1,1-NHNH 2 Respectively adding trimesic aldehyde into 10mL of dichloromethane solvent, dispersing and dissolving the raw materials by ultrasound to form an organic phase solution, and adding PEG-1,1-NHNH 2 Added to 8mL of a 3mol/L aqueous acetic acid solution, and ultrasonically dispersed into an aqueous phase solution. Slowly adding the water phase solution with lower density into the organic phase solution in a cylindrical container with 20mL, and then addingAnd sealing the container mouth to prevent pollution and volatilization of liquid, continuously polymerizing the interface for 3-5 days to obtain the covalent organic framework membrane, putting the obtained membrane into a culture dish with a cover, and washing for 3 times by using DCM to obtain the covalent organic framework membrane COF-B-1.
EXAMPLE 5
Respectively putting the covalent organic framework gel films COF-B-1 and COF-B-2 into a glove box filled with argon, and soaking the covalent organic framework gel films in lithium electrolyte (1.0M LiTFSI DME: DOL ═ 1:1 Vol% with 1.0% LiNO) 3 ) After the battery is soaked for more than 24 hours, the battery is taken out to be used as an electrolyte, LFP is used as a positive electrode, a lithium sheet is used as a negative electrode, and the battery is assembled into a button battery in a glove box. And (4) carrying out constant-current charge and discharge test through a blue test system, and testing the multiplying power performance and the cycle performance of the system.
FIG. 1 is a physical diagram of (a) COF-B-1 and (B) COF-B-2, which can be seen to have distinct gel characteristics.
Fig. 2 XRD patterns of (a) COF-B-1 and (B) COF-B-2, it can be confirmed that PEG chain modified covalent organic framework COF-B-n (n ═ 1,2) films were successfully synthesized.
FIG. 3 is an infrared image of COF-B-2 film and COF-B-1 film, and it can be seen that the COF-B-2 film and the COF-B-1 film are at 1226cm -1 And 1675cm -1 The formation of C ═ N bonds can be confirmed by the infrared absorption peak of (a).
Fig. 4 is a TGA curve of COF-B-2 film and COF-B-1 film, and it can be seen that both materials have good thermal stability with a thermal decomposition temperature of 320 ℃.
FIG. 5 is an SEM image of a COF-B-1 film, and (B) is a partially enlarged view of (a), and it can be observed that the microstructure of the COF-B-1 film is in a form of small spheres, and the diameter of each of the small spheres is about 1 to 3 μm.
FIG. 6 is an SEM image of a COF-B-2 film, and (B) is a partially enlarged view of (a), it can be observed that the microstructure of the COF-B-2 is a globular shape, but has edges and corners compared with the globular shape of the COF-B-1, and the diameter of each globule is about 1 to 3 μm.
FIG. 7 shows the charge and discharge curves of the coin cell assembled by the COF-B-1 film (a) and the COF-B-2 film (B) as the electrolyte, so that the cell composed of both films can stably circulate for more than 20 cycles.
Fig. 8 is a cyclic specific capacity diagram of LFP COF-B-n (n is 1,2) Li, it can be seen that constant current charge and discharge test is performed at 0.1C, after 30 cycles, the charge and discharge specific capacity of battery B1 (a coin battery assembled by COF-B-1 film as electrolyte) is still maintained above 98%, which shows that the cyclic stability is good, and similarly, the charge and discharge specific capacity of battery B2 (a coin battery assembled by COF-B-2 film as electrolyte) is also maintained above 98%, and the charge and discharge specific capacity of B1 is higher than that of B2.
Fig. 9 is a rate performance graph of LFP | COF-B-n (n | 1,2) | Li, and it can be seen that when the current density is increased to 1C, the charge-discharge specific capacity of the battery B1 is slightly reduced, when the current density is increased to 5C, the charge-discharge specific capacity is still maintained at about 70%, and when the current density is restored to 0.1C again, the charge-discharge specific capacity is restored to the original level, which indicates that the battery has good rate performance, as does the battery B2.
Claims (10)
- A PEG chain modified covalent organic framework membrane characterized by the structural formula:
- 2. the method of preparing a PEG chain modified covalent organic framework membrane according to claim 1, comprising the steps of:according to the mole ratio of 2:3 of trimesic aldehyde to PEG chain modified amino compound, dissolving trimesic aldehyde in dichloromethane to form an organic phase solution, dissolving PEG chain modified amino compound in acetic acid aqueous solution to form an aqueous phase solution, slowly dripping the aqueous phase solution on the top of the organic phase solution, performing two-phase interface polymerization film forming reaction at room temperature, and washing after 1-5 days to obtain a covalent organic framework film, wherein the structural formula of the PEG chain modified amino compound is as follows:
the structural formula of the trimesic aldehyde is as follows:
- 3. the method according to claim 2, wherein the concentration of trimesic aldehyde in dichloromethane is 0.01 to 0.3 mol/L.
- 4. The method according to claim 2, wherein the concentration of the PEG chain-modified amino compound in the aqueous solution of acetic acid is 0.01 to 0.3 mol/L; in the acetic acid aqueous solution, the concentration of acetic acid is 1-15 mol/L.
- 5. The method according to claim 2, wherein the volume ratio of the aqueous phase solution to the organic phase solution is 1:1 to 1: 10.
- 6. The method according to claim 2, wherein the washing is carried out with dichloromethane for 12 hours.
- 7. A gel electrolyte based on a PEG chain modified covalent organic framework membrane, which is characterized in that the gel electrolyte is prepared by mixing the PEG chain modified covalent organic framework membrane of claim 1 with an electrolyte and standing for more than 24 hours.
- 8. A gel electrolyte according to claim 7, wherein said electrolyte is 0.5M LiCF 3 SO 3 Solution, 0.5M LiNO 3 An electrolyte formed by dissolving DME/DOL mixed solvent with the volume ratio of 1:1, 1.0M LiTFSI and 1.0 percent LiNO 3 An electrolyte formed by dissolving in a DME/DOL mixed solvent with the volume ratio of 1:1, or 1.0M LiPF 6 And 1.0% VC in a mixed solvent form of EC/DMC/DEC in a volume ratio of 1:1:1And (3) the electrolyte is formed.
- 9. Use of the gel electrolyte of claim 7 in a battery.
- 10. The use of claim 9, wherein the battery is a sodium battery or a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210822182.5A CN115124673A (en) | 2022-07-13 | 2022-07-13 | PEG (polyethylene glycol) chain modified covalent organic framework membrane, preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210822182.5A CN115124673A (en) | 2022-07-13 | 2022-07-13 | PEG (polyethylene glycol) chain modified covalent organic framework membrane, preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115124673A true CN115124673A (en) | 2022-09-30 |
Family
ID=83383942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210822182.5A Pending CN115124673A (en) | 2022-07-13 | 2022-07-13 | PEG (polyethylene glycol) chain modified covalent organic framework membrane, preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115124673A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111454410A (en) * | 2020-04-09 | 2020-07-28 | 南开大学 | Intelligent responsive covalent organic framework membrane material, preparation method and application thereof |
| CN112619445A (en) * | 2020-12-30 | 2021-04-09 | 嘉兴罗顿新材料科技有限公司 | Novel Polymer-COF-MOF composite film and preparation method thereof |
| CN113388081A (en) * | 2021-05-31 | 2021-09-14 | 南京理工大学 | Double-chain polyethylene oxide modified covalent organic framework, preparation method and application thereof |
| CN113621118A (en) * | 2021-07-08 | 2021-11-09 | 南京理工大学 | Alkyl chain modified covalent organic framework membrane, preparation method and application thereof |
-
2022
- 2022-07-13 CN CN202210822182.5A patent/CN115124673A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111454410A (en) * | 2020-04-09 | 2020-07-28 | 南开大学 | Intelligent responsive covalent organic framework membrane material, preparation method and application thereof |
| CN112619445A (en) * | 2020-12-30 | 2021-04-09 | 嘉兴罗顿新材料科技有限公司 | Novel Polymer-COF-MOF composite film and preparation method thereof |
| CN113388081A (en) * | 2021-05-31 | 2021-09-14 | 南京理工大学 | Double-chain polyethylene oxide modified covalent organic framework, preparation method and application thereof |
| CN113621118A (en) * | 2021-07-08 | 2021-11-09 | 南京理工大学 | Alkyl chain modified covalent organic framework membrane, preparation method and application thereof |
Non-Patent Citations (2)
| Title |
|---|
| GEN ZHANG等: "Accumulation of Glassy Poly(ethylene oxide) Anchored in a Covalent Organic Framework as a Solid-State Li+ Electrolyte", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 141, pages 1227 * |
| YUXIANG WANG等: "Branched Poly(ethylene glycol)-Functionalized Covalent Organic Frameworks as Solid Electrolytes", APPLIED ENERGY MATERIALS, vol. 4, pages 11720 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20080226989A1 (en) | Electrolytic salts for lithium batteries | |
| CN103094611B (en) | Preparation method for ionic liquid gel electrolyte | |
| CN114156543B (en) | Sodium ion battery electrolyte, sodium ion battery and preparation method | |
| CN109776423A (en) | A kind of double imidazole ring functional ion liquids and preparation method thereof and electrolyte and lithium secondary battery | |
| CN113388081B (en) | Double-chain polyethylene oxide modified covalent organic framework, preparation method and application thereof | |
| CN111725559B (en) | Solid electrolyte, method for preparing the same, and lithium secondary solid battery | |
| CN113621118A (en) | Alkyl chain modified covalent organic framework membrane, preparation method and application thereof | |
| CN104479112A (en) | Self-crosslinkingcomb-shaped polymer and lithium-ionsolid polymerelectrolyte | |
| CN111653824A (en) | Gel polymer electrolyte, rapid preparation method thereof and battery | |
| CN106684443A (en) | Preparation method for modified graphene oxide-doped solid polymer electrolyte | |
| CN113248707A (en) | Covalent organic framework materials, methods of making the same, and uses thereof in lithium ion batteries | |
| CN107887573A (en) | Positive active material and its application with topological structure | |
| CN109456484B (en) | Novel fluorine-containing sulfimide single-ion conductor polymer with conjugated structure and preparation method and application thereof | |
| CN110611120A (en) | Single-ion conductor polymer all-solid-state electrolyte and lithium secondary battery comprising same | |
| CN114639811B (en) | Prussian blue electrode material and preparation method and application thereof | |
| CN115124673A (en) | PEG (polyethylene glycol) chain modified covalent organic framework membrane, preparation method and application thereof | |
| CN113416178B (en) | Lithium battery additive amido vinyl sulfate, and preparation method and application thereof | |
| WO2022127193A1 (en) | Electrolyte containing nitrogen-based salt structure, preparation method therefor and use thereof | |
| CN115043970A (en) | Cross-linked porous polymer lithium-sulfur battery positive electrode carrier material containing maleimide structure, preparation method and application thereof | |
| CN111211327B (en) | Compound for lithium ion battery anode material and preparation method and application thereof | |
| CN112331911B (en) | Preparation method of all-solid-state electrolyte of lithium battery and prepared all-solid-state electrolyte | |
| CN114361573A (en) | Non-aqueous eutectic electrolyte and preparation method and application thereof | |
| CN109671978B (en) | High-voltage-resistant solid polymer electrolyte, preparation method and application thereof | |
| CN113121547A (en) | Nitrogen-containing polyquinone organic electrode material and preparation method and application thereof | |
| CN103833558B (en) | Ion liquid of quaternaries and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |