CN220774651U - Sodium ion battery diaphragm structure with good liquid absorption performance - Google Patents
Sodium ion battery diaphragm structure with good liquid absorption performance Download PDFInfo
- Publication number
- CN220774651U CN220774651U CN202321860608.2U CN202321860608U CN220774651U CN 220774651 U CN220774651 U CN 220774651U CN 202321860608 U CN202321860608 U CN 202321860608U CN 220774651 U CN220774651 U CN 220774651U
- Authority
- CN
- China
- Prior art keywords
- sodium ion
- ion battery
- coating
- organic framework
- liquid absorption
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- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 58
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 title claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000012621 metal-organic framework Substances 0.000 claims abstract description 49
- 238000000576 coating method Methods 0.000 claims abstract description 47
- 239000011248 coating agent Substances 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 5
- 239000010941 cobalt Substances 0.000 claims abstract description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 239000010416 ion conductor Substances 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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 10
- 229910052708 sodium Inorganic materials 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 10
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 3
- DCYOBGZUOMKFPA-UHFFFAOYSA-N iron(2+);iron(3+);octadecacyanide Chemical compound [Fe+2].[Fe+2].[Fe+2].[Fe+3].[Fe+3].[Fe+3].[Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] DCYOBGZUOMKFPA-UHFFFAOYSA-N 0.000 claims description 3
- 229960003351 prussian blue Drugs 0.000 claims description 3
- 239000013225 prussian blue Substances 0.000 claims description 3
- 238000007761 roller coating Methods 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000010345 tape casting Methods 0.000 claims description 3
- 238000005213 imbibition Methods 0.000 claims 2
- 229920000447 polyanionic polymer Polymers 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005524 ceramic coating Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000013110 organic ligand Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- 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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- Cell Separators (AREA)
Abstract
The utility model discloses a sodium ion battery diaphragm structure with good liquid absorption performance, wherein one side or two sides of a base film are coated with a metal organic framework material coating. The metal organic framework material coating is a MOF material layer formed by taking cobalt as a central atom, a MOF material layer formed by taking iron as a central atom and/or a MOF material layer formed by taking nickel as a central atom. The sodium ion battery diaphragm structure with good liquid absorption performance has the characteristics of excellent liquid absorption performance, good electrolyte compatibility, high thermal stability and wide application temperature range.
Description
Technical Field
The utility model relates to the technical field of sodium ion batteries, in particular to a membrane structure of a sodium ion battery with good liquid absorption performance.
Background
Sodium ion batteries and lithium ion batteries are two different types of rechargeable batteries. Although they have some similarities in cell chemistry and performance, there is still some difference in separator, in particular: as for chemical stability, the separator needs to have higher chemical stability to prevent severe reaction with sodium in the electrolyte due to lower operating voltage of the sodium ion battery; as in ion conductivity, sodium ions have a relatively slow ion conduction rate in the battery, so the sodium ion battery separator is required to have a high ion conduction performance; as with thickness and pore structure, sodium ion battery separators are typically thicker than lithium ion battery separators and require a larger pore structure to facilitate diffusion of sodium ions. Accordingly, sodium ion battery separators are generally modified by ceramic coatings to enhance their performance.
Among ceramic separator coatings, ceramic materials can provide higher thermal and chemical stability, and thus use of ceramic separator coatings in certain sodium ion batteries can provide better insulation and have longer service lives.
However, the ceramic coating is mainly made of alumina or silica, is an organic material, has limited porosity and adsorption capacity, and meets the requirement of liquid absorption performance only when the surface is required to be subjected to chemical treatment or physical treatment to improve the wettability of the surface with an organic solvent, so that the application of the ceramic coating in sodium ion batteries is directly limited.
Disclosure of Invention
The utility model aims to provide a sodium ion battery diaphragm structure with good liquid absorption performance, which has the characteristics of excellent liquid absorption performance, good electrolyte compatibility, high thermal stability and wide application temperature range.
The utility model can be realized by the following technical scheme:
the utility model discloses a sodium ion battery diaphragm structure with good liquid absorption performance, which comprises a base film, wherein one side or two sides of the base film are coated with a metal organic framework material coating. The metal organic framework material is a crystal structure formed by metal ions and organic ligands through coordination bonds, and has high adjustability and porous properties, so that the performance is improved.
Further, the metal organic framework material coating is a MOF material layer formed by taking cobalt as a central atom, a MOF material layer formed by taking iron as a central atom and/or a MOF material layer formed by taking nickel as a central atom. The MOF material layer formed by taking cobalt/iron/nickel as a central atom can change the pore structure and the surface chemical property of the material by introducing sodium ions. In the aspect of pore regulation, the size and shape of pores can be regulated by introducing sodium ions, so that the adsorption performance and storage capacity of the material are changed.
Further, a sodium fast ion conductor coating is arranged between the metal organic framework material coating and the base film. Through setting up sodium fast ion conductor, form abundant sodium ion source, have the effect of pre-sodization, avoid causing the collapse of metal organic framework material structure because of the consumption of sodium ion at the formation process of SEI interface, guarantee structural stability.
Further, the metal organic framework material coating and the sodium ion conductor coating are coated on the surface of the polyolefin-based film in a knife coating, spraying and/or roller coating mode. And flexible processing modes are adopted, so that the operation difficulty is simplified, and the coating effect is ensured.
Further, the base film is a microporous polyolefin film, a nonwoven fabric film, a nanofiber film or a cellulose membrane. The membrane has wide base membrane selection, is suitable for different membrane structures, improves the battery performance, and reduces the battery cost.
Further, the bonding interface of the metal organic framework material coating and the sodium ion conductor coating is a texture structure surface. By arranging the texture structure and combining the mutual contact permeation of interfaces, the internal resistance of interface contact is reduced, and the transmission of sodium ions is accelerated.
Further, the base film is a wet base film or a dry base film; the polyolefin-based film is a single-layer film or a multi-layer composite film, and has higher flexibility
Further, the pore diameter of the microporous structure of the base film is 0.02-0.08 mu m, so that the process requirements of different thicknesses are met.
Another aspect of the utility model is to protect a sodium ion battery that is wound or laminated between pole pieces with the above-described separator structure spacing.
Further, the sodium ion battery is a polyanionic sodium ion battery, a layered oxide sodium ion battery or a Prussian blue/white sodium ion battery.
The sodium ion battery diaphragm structure with good liquid absorption performance has the following beneficial effects:
the first and the liquid absorption performance are excellent, the metal organic framework material coating has very high porosity, usually between 60% and 90%, has larger adsorption capacity, and ensures that sufficient electrolyte is absorbed to form excellent conductivity between the pole pieces;
secondly, the electrolyte has good compatibility, and the metal organic framework material coating and the main solvent of the electrolyte have good compatibility, so that the metal organic framework material coating is fully contacted with the diaphragm and the coating, and the contact internal resistance is reduced;
thirdly, the high-temperature stability is good, the metal organic framework material coating is used for keeping the structural stability at a relatively high temperature, and the chemical bond between the metal ions and the organic ligands formed by the metal organic framework material coating can resist pyrolysis and decomposition under the high-temperature condition;
fourth, the applicable temperature range is wide, and the metal organic framework material coating has higher pyrolysis temperature, and can be used in a relatively higher temperature range due to the stability of the structure maintained at high temperature.
Drawings
FIG. 1 is a schematic structural diagram of a membrane structure of a sodium ion battery with good liquid absorption performance, wherein one side of the membrane structure is coated with a metal organic framework material coating;
FIG. 2 is a schematic structural diagram of a membrane structure of a sodium ion battery with good liquid absorption performance, which is coated with a metal-organic framework material coating on both sides;
FIG. 3 is a schematic structural diagram of a membrane structure of a sodium ion battery with good liquid absorption performance, wherein one side of the membrane structure is coated with a metal organic framework material coating and a sodium fast ion conductor coating;
FIG. 4 is a schematic structural diagram of a membrane structure of a sodium ion battery with good liquid absorption performance, which is coated with a metal organic framework material coating and a sodium fast ion conductor coating on both sides;
the labels in the drawings include: 100. a base film; 200. a metal organic framework material coating; 300. and (3) a sodium fast ion conductor coating.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the following further details of the present utility model will be described with reference to examples and drawings.
As shown in fig. 1-2, the utility model discloses a sodium ion battery diaphragm structure with good liquid absorption performance, which comprises a base film 100, wherein one side or two sides of the base film 100 are coated with a metal organic framework material coating 200.
In the present utility model, based on the development of the existing metal-organic framework material, the metal-organic framework material type which is commonly prepared and used at present is preferred, and the metal-organic framework material coating is a MOF material layer formed by taking cobalt as a central atom, a MOF material layer formed by taking iron as a central atom and/or a MOF material layer formed by taking nickel as a central atom. However, in practical applications, the metal-organic frameworks are not limited to the above types, and as metal-organic frameworks are lazy to develop, MOF material layers formed with sodium as a central atom also have application possibilities and potential in the near future.
In the present utility model, as shown in fig. 3 and 4, in order to avoid excessive occupation of sodium ion resources caused by too high porosity, a sodium fast ion conductor coating 300 is further disposed between the metal organic framework material coating 200 and the base film 100, through which a sufficient sodium ion is provided to form a pre-sodification effect.
In the utility model, the requirements of the metal organic framework material coating on the process are not high, and specifically, the metal organic framework material coating and the sodium ion conductor coating are coated on the surface of the polyolefin-based film in a knife coating, spraying and/or roller coating mode. Meanwhile, the coating of the sodium fast ion conductor can also be formed by processing in the mode. Meanwhile, in order to improve the binding force and simplify the difficulty of coating control, the binding interface of the metal organic framework material coating and the sodium ion conductor coating is a texture surface, and the rules and the irregularities of the texture surface have corresponding technical effects.
In the present utility model, there is no particular requirement that the base film is a microporous polyolefin film, a nonwoven fabric film, a nanofiber film or a cellulose separator, which is mainly of the existing type. Specifically, the base film is a wet base film or a dry base film; the polyolefin-based film is a single-layer film or a multi-layer composite film; the pore size of the microporous structure of the base film is 0.02-0.08 mu m.
Another aspect of the utility model is to protect a sodium ion battery that is wound or laminated between pole pieces with the above-described separator structure spacing. Specifically, the sodium ion battery is a polyanionic sodium ion battery, a layered oxide sodium ion battery or a Prussian blue/white sodium ion battery.
The foregoing examples are merely exemplary embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and that these obvious alternatives fall within the scope of the utility model.
Claims (8)
1. The utility model provides a good sodium ion battery diaphragm structure of imbibition performance, includes basic film, its characterized in that: one side or two sides of the base film are coated with a metal organic framework material coating; the metal organic framework material coating is a MOF material layer formed by taking cobalt as a central atom, a MOF material layer formed by taking iron as a central atom and/or a MOF material layer formed by taking nickel as a central atom.
2. The sodium ion battery separator structure with good liquid absorption performance according to claim 1, wherein: and a sodium fast ion conductor coating is further arranged between the metal organic framework material coating and the base film.
3. The sodium ion battery separator structure with good liquid absorption performance according to claim 2, wherein: the metal organic framework material coating and the sodium ion conductor coating are coated on the surface of the polyolefin-based film in a knife coating, spraying and/or roller coating mode.
4. A sodium ion battery separator structure with good imbibition performance according to claim 3, characterized in that: the combination interface of the metal organic framework material coating and the sodium ion conductor coating is a texture structure surface.
5. The sodium ion battery separator structure with good liquid absorption performance according to claim 4, wherein: the base film is a wet base film or a dry base film; the polyolefin-based film is a single-layer film or a multi-layer composite film.
6. The sodium ion battery separator structure with good liquid absorption performance according to claim 5, wherein: the pore diameter of the microporous structure of the base film is 0.02-0.08 mu m.
7. A sodium ion battery characterized by: a separator structure according to any one of claims 1 to 6 wound or laminated between pole pieces.
8. The sodium ion battery of claim 7 wherein: the sodium ion battery is a polyanion sodium ion battery, a layered oxide sodium ion battery or a Prussian blue/white sodium ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321860608.2U CN220774651U (en) | 2023-07-17 | 2023-07-17 | Sodium ion battery diaphragm structure with good liquid absorption performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321860608.2U CN220774651U (en) | 2023-07-17 | 2023-07-17 | Sodium ion battery diaphragm structure with good liquid absorption performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220774651U true CN220774651U (en) | 2024-04-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321860608.2U Active CN220774651U (en) | 2023-07-17 | 2023-07-17 | Sodium ion battery diaphragm structure with good liquid absorption performance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220774651U (en) |
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2023
- 2023-07-17 CN CN202321860608.2U patent/CN220774651U/en active Active
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| GR01 | Patent grant |