CN114613615A - Ultrathin polyoxyethylene-based solid electrolyte film and preparation method thereof - Google Patents
Ultrathin polyoxyethylene-based solid electrolyte film and preparation method thereof Download PDFInfo
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- 229920003171 Poly (ethylene oxide) Polymers 0.000 title claims abstract description 92
- -1 polyoxyethylene Polymers 0.000 title claims abstract description 78
- 239000007784 solid electrolyte Substances 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 33
- 239000001257 hydrogen Substances 0.000 claims abstract description 30
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 22
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000006185 dispersion Substances 0.000 claims abstract description 18
- 239000003792 electrolyte Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000002904 solvent Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 28
- 238000004132 cross linking Methods 0.000 claims description 21
- 239000011159 matrix material Substances 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 18
- 239000004202 carbamide Substances 0.000 claims description 13
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 10
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 10
- 238000012986 modification Methods 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 230000000536 complexating effect Effects 0.000 claims description 4
- 229920006254 polymer film Polymers 0.000 claims description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004642 Polyimide Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- XOUAQPDUNFWPEM-UHFFFAOYSA-N 2,3,4-tris(hydroxymethyl)phenol Chemical compound OCC1=CC=C(O)C(CO)=C1CO XOUAQPDUNFWPEM-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 4
- 238000013461 design Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 abstract description 2
- 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 6
- 238000005303 weighing Methods 0.000 description 4
- QTJOIXXDCCFVFV-UHFFFAOYSA-N [Li].[O] Chemical compound [Li].[O] QTJOIXXDCCFVFV-UHFFFAOYSA-N 0.000 description 3
- 239000000386 donor Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 239000011244 liquid electrolyte Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000852 hydrogen donor Substances 0.000 description 1
- 229910003480 inorganic solid Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000010416 ion conductor Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/56—Solid electrolytes, e.g. gels; Additives therein
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
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- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
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Abstract
The invention relates to a preparation method of an ultrathin polyoxyethylene-based solid electrolyte film, which comprises the following steps: dispersing polyoxyethylene and electrolyte salt into acetonitrile according to a set molar ratio, and stirring until the polyoxyethylene and the electrolyte salt are completely dissolved; adding a cross-linking agent and polyoxyethylene into the solution according to a set molar ratio of a hydrogen bond acceptor, and stirring until the cross-linking agent and the polyoxyethylene are completely dispersed to obtain a dispersion liquid; and dripping the obtained dispersion liquid on two sides of the polymer support substrate respectively, uniformly coating the dispersion liquid, drying to remove the solvent, and obtaining the film on two sides of the polymer support substrate. The invention has the beneficial effects that: the invention can realize the precise regulation and control of the mechanical property and the thickness of the solid electrolyte film by controlling the molar ratio of the cross-linking agent to the polyethylene oxide and the rolling distance. For the design difficulty of the ultrathin solid electrolyte film, the invention provides a feasible design idea, has the advantages of simplicity, economy and the like, and can be used for super capacitors and batteries to improve the safety of devices.
Description
Technical Field
The invention belongs to the technical field of solid electrolytes, and particularly relates to an ultrathin polyoxyethylene-based solid electrolyte film and a preparation method thereof.
Background
Solid electrolytes, also known as fast ion conductors, can be broadly classified by their composition into inorganic solid electrolytes, polymer solid electrolytes, and composite solid electrolytes. The polymer solid electrolyte is formed by complexing polar high polymer and metal salt, and is similar to the organic liquid electrolyte. Compared with the organic liquid electrolyte, the polymer solid electrolyte has the advantages of excellent safety, excellent thermal stability, wider electrochemical window (slightly higher than the organic liquid electrolyte), good flexibility and processability and the like.
Most of the current research on all-solid polymer electrolytes focuses on enhancing ionic conductivity and improving interface stability, and the thickness of the electrolyte membrane receives less attention. Article from huang yun hui et al:
Jingyi Wu,Lixia Yuan,Wuxing Zhang,Zhen Li,Xiaolin Xie and Yunhui Huang,“Reducing the thickness of solid-state electrolyte membranes for high-energy lithium batteries”.Energy Environ.Sci.,2021,14,12-36.
it is noted herein that the internal resistance of a battery depends on the ionic conductance and the charge transfer resistance of the solid-state electrolyte, where the ionic conductance (G ═ σ a/L, G is the ionic conductance, σ is the ionic conductance, a is the area, L is the thickness) is inversely proportional to the electrolyte thickness, mainly because decreasing the thickness shortens the transport time of ions in the electrolyte. Therefore, the ion conductivity of the ultrathin solid electrolyte film can be improved.
The difficulty in ultra-thin solid electrolyte membrane design is the tradeoff between minimizing thickness and maintaining mechanical strength.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an ultrathin polyoxyethylene-based solid electrolyte film and a preparation method thereof.
The ultrathin polyoxyethylene-based solid electrolyte film includes: the polymer support substrate is positioned between two layers of the crosslinking modified polyoxyethylene-based solid electrolyte matrix; the polymer supporting substrate is a polymer film, and the crosslinking modification mode of the polyoxyethylene-based solid electrolyte matrix is hydrogen bond crosslinking.
Preferably, the polymer supporting substrate is made of an insulating porous material and has a thickness of 5-10 μm, and the polyoxyethylene-based solid electrolyte matrix 2 has a thickness of 5-15 μm.
Preferably, the polymer supporting substrate is made of at least one of polytetrafluoroethylene, polyvinylidene fluoride and polyimide.
Preferably, the thickness of the entire ultrathin polyoxyethylene-based solid electrolyte film is 5 to 30 μm.
Preferably, the crosslinking modified polyoxyethylene-based solid electrolyte matrix is a solid electrolyte matrix formed by complexing polyethylene oxide and an electrolyte salt.
Preferably, the molar ratio of the cross-linking agent hydrogen bond donor to the polyoxyethylene hydrogen bond acceptor in the polyoxyethylene-based solid electrolyte matrix is 1: 1-1: 10.
The preparation method of the ultrathin polyoxyethylene-based solid electrolyte film comprises the following steps:
step 3, respectively dripping the dispersion liquid obtained in the step 2 on two sides of a polymer support substrate, uniformly coating the dispersion liquid, drying to remove the solvent, and obtaining films on two sides of the polymer support substrate;
Preferably, the cross-linking agent in step 2 provides at least two hydrogen bond donors, and the hydrogen bond donors are simultaneously subjected to hydrogen bond cross-linking with a plurality of polyethylene oxide chains; the specific hydrogen bond crosslinking mode is as follows: a hydrogen bond donor provided by the cross-linking agent and ether oxygen in polyoxyethylene form a hydrogen bond to form a network structure, so that the mechanical property of the solid electrolyte film is improved; the crosslinking agents include urea, thiourea and tris-methylol phenol.
Preferably, the molar ratio of the polyoxyethylene to the electrolyte salt in the step 1 is 1: 8-1: 20; in the step 2, the molar ratio of the cross-linking agent to the hydrogen bond acceptor in the polyoxyethylene is 1: 1-1: 10; and 3, uniformly coating the dispersion liquid, and drying at 60 ℃ for 12h to remove the solvent.
Preferably, the dispersion is coated on both sides of the polymer-supporting substrate in step 3 to have a coating height of 100 to 500. mu.m.
The invention has the beneficial effects that:
the solid electrolyte film provided by the invention is a film consisting of a polymer support substrate and a cross-linked modified polyoxyethylene-based solid electrolyte, and is a uniform solid electrolyte film of 5-30 mu m obtained after multiple rolling; the polymer supporting substrate is a polymer film, and the crosslinking modification is hydrogen bond crosslinking.
The insulating porous polymer support substrate not only serves as a support framework of the solid electrolyte film, but also ensures ion transmission and electronic insulation. The polyoxyethylene contains an ether oxygen unshared electron pair and has strong affinity to a hydrogen bond; the invention selects the cross-linking agent with multiple hydrogen bond donors, a plurality of hydrogen donors of the cross-linking agent simultaneously form hydrogen bonds with different polyethylene oxide chains, and the different polyethylene oxide chains are mutually connected through the cross-linking agent to realize a network structure, thereby improving the mechanical property of the solid electrolyte; according to the invention, through rolling the solid electrolyte film for multiple times, the deformation of the film caused by rolling can be reduced, and the uniform solid electrolyte film with the thickness of 5-30 mu m can be obtained.
The invention can realize the precise regulation and control of the mechanical property and the thickness of the solid electrolyte film by controlling the molar ratio of the cross-linking agent to the polyethylene oxide and the rolling distance. For the design difficulty of the ultrathin solid electrolyte film, the invention provides a feasible design idea, has the advantages of simplicity, economy and the like, and can be used for super capacitors and batteries to improve the safety of devices.
Drawings
FIG. 1 is a schematic structural view of an ultrathin polyoxyethylene-based solid electrolyte membrane;
FIG. 2 is a scanning step plot of an ultrathin polyethylene oxide-based solid electrolyte membrane;
FIG. 3 is a graph of electrochemical performance of a solid-state supercapacitor based on an ultra-thin polyethylene oxide based solid electrolyte film;
FIG. 4 is a step-scan of ultra-thin polyethylene oxide-based solid electrolyte films of different thicknesses;
fig. 5 is a graph of tensile properties of different polyoxyethylene-based solid electrolyte membranes.
Description of reference numerals: a polymer supporting substrate 1 and a crosslinking modified polyethylene oxide-based solid electrolyte matrix 2.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that modifications can be made to the invention by a person skilled in the art without departing from the principle of the invention, and these modifications and modifications also fall within the scope of the claims of the invention.
Example 1
As shown in fig. 1, an ultra-thin polyoxyethylene-based solid electrolyte membrane includes: a polymer support substrate 1 and a crosslinking modified polyethylene oxide base solid electrolyte matrix 2, wherein the polymer support substrate 1 is positioned between two layers of the crosslinking modified polyethylene oxide base solid electrolyte matrix 2; the polymer supporting substrate 1 is a polymer film, and the crosslinking modification mode of the polyoxyethylene-based solid electrolyte matrix is hydrogen bond crosslinking.
The thickness of the polymer supporting substrate 1 is 5-10 μm, and the material of the polymer supporting substrate 1 is at least one of polytetrafluoroethylene, polyvinylidene fluoride and polyimide. The overall thickness of the ultrathin polyoxyethylene-based solid electrolyte film is 5-30 mu m.
The crosslinking modified polyoxyethylene-based solid electrolyte matrix 2 is a solid electrolyte matrix formed by complexing polyoxyethylene and electrolyte salt. The molar ratio of the cross-linking agent hydrogen bond donor to the polyoxyethylene hydrogen bond acceptor in the polyoxyethylene-based solid electrolyte matrix is 1: 1-1: 10.
Example 2
The preparation of the ultrathin polyoxyethylene-based solid electrolyte film and the performance test of the solid supercapacitor thereof comprise the following specific steps:
(1) weighing a certain weight of polyoxyethylene and lithium bistrifluoromethanesulfonimide according to a lithium-oxygen ratio of 1:8, dissolving in acetonitrile solvent with a certain volume, and magnetically stirring for 24 hours until the polyoxyethylene and the lithium bistrifluoromethanesulfonimide are completely dissolved;
(2) adding urea into the solution according to the molar ratio of the urea to the polyoxyethylene of 1/10, and magnetically stirring for 12 hours until the urea is completely dissolved to obtain a dispersion liquid;
(3) taking a Polytetrafluoroethylene (PTFE) film with the thickness of 10 mu m as a supporting substrate, and respectively dripping a certain volume of the dispersion liquid obtained in the step 2 on two sides of the PTFE film;
(4) coating the dispersion liquid dripped in the step (3) by adopting a coating device with the thickness of 100 mu m, and naturally airing a coated sample;
(5) sequentially rolling the sample obtained in the step (4) for three times at 3 rolling intervals from large to small to obtain the ultrathin polyoxyethylene-based solid electrolyte film;
a sample having a thickness of 5.5 μm obtained in step 5 of this mutexample was scanned using a Bruker Dektak XT-A step profiler to obtain a step profiler scan of an ultrathin polyethylene oxide-based solid electrolyte film as shown in FIG. 2.
Activated carbon is used as an electrode, charge and discharge cycle tests are carried out at 50 ℃ according to the current density of 0.1mA/mg and the voltage range of 0-2.5V, and the test results are shown in figure 3: after 50 cycles, the capacity retention rate can reach 94%, and the charge-discharge efficiency is kept at 90%.
Example 3
The preparation process of the ultrathin polyethylene oxide base solid electrolyte film with different thicknesses is as follows:
(1) weighing a certain weight of polyoxyethylene and lithium bistrifluoromethanesulfonimide according to a lithium-oxygen ratio of 1:15, dissolving in a certain volume of acetonitrile solvent, and magnetically stirring for 24 hours until the polyoxyethylene and the lithium bistrifluoromethanesulfonimide are completely dissolved;
(2) weighing urea into the solution according to the molar ratio of the urea to the polyoxyethylene of 1/20, and magnetically stirring for 12 hours until the urea is completely dissolved;
(3) taking a Polytetrafluoroethylene (PTFE) film with the thickness of 10 mu m as a supporting substrate, and respectively dripping a certain volume of the dispersion liquid prepared in the step 2 on two sides of the PTFE film;
(4) coating the dispersion liquid dripped in the step (3) by adopting a coating device with the thickness of 100 mu m, and naturally airing a coated sample;
(5) and (4) respectively rolling the sample in the step (4) for four times under rolling gaps of 18-16-11-11, 18-16-16-16 and 18-18-18 to obtain three samples with different thicknesses, and sequentially rolling for three times, wherein the thickness of the sample is tested by adopting a Bruker Dektak XT-A step instrument.
FIG. 4 is a scanning diagram of steps of ultra-thin polyethylene oxide based solid electrolyte films of different thicknesses, and the measured thicknesses of the samples are 5.6 μm, 16.5 μm, and 25.6. mu.m, respectively.
Example 4
The preparation process of the tensile property of the comparative polyoxyethylene-based solid electrolyte is as follows:
(1) weighing a certain weight of polyoxyethylene and lithium bistrifluoromethanesulfonimide according to the lithium-oxygen ratio of 1:15, dissolving in a certain volume of acetonitrile solvent, and magnetically stirring for 24 hours until the polyoxyethylene and the lithium bistrifluoromethanesulfonimide are completely dissolved. Repeating the steps to prepare two parts of solution;
(2) urea was weighed into the solution according to a molar ratio of urea to polyethylene oxide of 1/10, and magnetically stirred for 12h until completely dissolved, numbering solution 1. The solution without urea addition was numbered as solution 2.
(3) Respectively adding 15ml of solution 1 and solution 2 into a PTFE square box, and naturally airing to obtain a film 1 (containing urea) and a film 2 (not containing urea);
(4) film 1/2 was cut into a 1 x 2cm rectangular shape comparing the tensile properties of film 1 and film 2.
Fig. 5 shows the tensile properties of different polyoxyethylene-based solid electrolyte membranes. Where film 1 has a maximum force elongation of 60% and film 2 is only 19%, film 1 has better tensile properties than film 2.
Claims (10)
1. An ultrathin polyethylene oxide-based solid electrolyte membrane, comprising: the electrolyte comprises a polymer supporting substrate (1) and a crosslinking modified polyoxyethylene-based solid electrolyte matrix (2), wherein the polymer supporting substrate (1) is positioned between two layers of the crosslinking modified polyoxyethylene-based solid electrolyte matrix (2); the polymer supporting substrate (1) is a polymer film, and the crosslinking modification mode of the polyoxyethylene-based solid electrolyte matrix is hydrogen bond crosslinking.
2. The ultrathin polyethylene oxide-based solid electrolyte membrane according to claim 1, characterized in that: the polymer support substrate (1) is an insulating porous material, the thickness of the polymer support substrate is 5-10 mu m, and the thickness of the polyoxyethylene-based solid electrolyte matrix (2) is 5-15 mu m.
3. The ultrathin polyethylene oxide-based solid electrolyte membrane according to claim 2, characterized in that: the polymer supporting substrate (1) is made of at least one of polytetrafluoroethylene, polyvinylidene fluoride and polyimide.
4. The ultrathin polyethylene oxide-based solid electrolyte membrane according to claim 1, characterized in that: the overall thickness of the ultrathin polyoxyethylene-based solid electrolyte film is 5-30 mu m.
5. The ultrathin polyethylene oxide-based solid electrolyte membrane according to claim 1, characterized in that: the crosslinking modified polyoxyethylene-based solid electrolyte matrix (2) is a solid electrolyte matrix formed by complexing polyoxyethylene and electrolyte salt.
6. The ultrathin polyethylene oxide-based solid electrolyte membrane according to claim 1, characterized in that: the molar ratio of the cross-linking agent hydrogen bond donor to the polyoxyethylene hydrogen bond acceptor in the polyoxyethylene-based solid electrolyte matrix is 1: 1-1: 10.
7. A method for producing the ultrathin polyoxyethylene-based solid electrolyte membrane as claimed in any one of claims 1 to 6, comprising the steps of:
step 1, dispersing polyoxyethylene and electrolyte salt into acetonitrile according to a set molar ratio, and stirring until the polyoxyethylene and the electrolyte salt are completely dissolved;
step 2, adding a cross-linking agent and polyoxyethylene into the solution obtained in the step 1 according to a set molar ratio of a hydrogen bond acceptor, and stirring until the cross-linking agent and the polyoxyethylene are completely dispersed to obtain a dispersion liquid;
step 3, respectively dripping the dispersion liquid obtained in the step 2 on two sides of the polymer support substrate, uniformly coating the dispersion liquid, drying to remove the solvent, and obtaining films on two sides of the polymer support substrate;
step 4, placing the film-polymer support substrate-film structure obtained in the step 3 into a rolling machine, and rolling for multiple times at a rolling gap from large to small to obtain an ultrathin polyoxyethylene-based solid electrolyte film with uniform thickness; symbol-denotes a composite connection.
8. The method for producing an ultrathin polyoxyethylene-based solid electrolyte membrane according to claim 7, characterized in that: in the step 2, the cross-linking agent provides at least two hydrogen bond donors, and the hydrogen bond donors are subjected to hydrogen bond cross-linking with a plurality of polyoxyethylene chains simultaneously; the specific hydrogen bond crosslinking mode is as follows: a hydrogen bond donor provided by the cross-linking agent and ether oxygen in polyoxyethylene form a hydrogen bond to form a network structure; the crosslinking agents include urea, thiourea and tris-methylol phenol.
9. The method for producing an ultrathin polyoxyethylene-based solid electrolyte membrane according to claim 7, characterized in that: in the step 1, the molar ratio of polyoxyethylene to electrolyte salt is 1: 8-1: 20; in the step 2, the molar ratio of the cross-linking agent to the hydrogen bond acceptor in the polyoxyethylene is 1: 1-1: 10; and 3, uniformly coating the dispersion liquid, and drying at 60 ℃ for 12h to remove the solvent.
10. The method for producing an ultrathin polyoxyethylene-based solid electrolyte membrane according to claim 7, characterized in that: in the step 3, the coating height of the dispersion liquid coated on the two sides of the polymer support substrate is 100-500 μm.
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| CN111584933A (en) * | 2020-05-19 | 2020-08-25 | 湘潭大学 | Solid electrolyte, preparation method thereof and battery |
| CN112952192A (en) * | 2021-03-12 | 2021-06-11 | 上海交通大学 | Preparation method and application of polyamino azulene-doped organic polymer electrolyte film |
| CN113937367A (en) * | 2021-10-12 | 2022-01-14 | 中国科学院苏州纳米技术与纳米仿生研究所 | Polymer-based composite solid electrolyte and preparation method and application thereof |
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