CN114464885A - Flame-retardant sodium-ion battery electrolyte and preparation method of safe sodium-ion battery - Google Patents
Flame-retardant sodium-ion battery electrolyte and preparation method of safe sodium-ion battery Download PDFInfo
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- CN114464885A CN114464885A CN202210140525.XA CN202210140525A CN114464885A CN 114464885 A CN114464885 A CN 114464885A CN 202210140525 A CN202210140525 A CN 202210140525A CN 114464885 A CN114464885 A CN 114464885A
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 54
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910001415 sodium ion Inorganic materials 0.000 title claims abstract description 38
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000003063 flame retardant Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims description 9
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 15
- 239000010452 phosphate Substances 0.000 claims abstract description 11
- 159000000000 sodium salts Chemical class 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 150000002170 ethers Chemical class 0.000 claims abstract description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 7
- 239000003085 diluting agent Substances 0.000 claims abstract 3
- 239000011734 sodium Substances 0.000 claims description 11
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 claims description 8
- YLKTWKVVQDCJFL-UHFFFAOYSA-N sodium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Na+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F YLKTWKVVQDCJFL-UHFFFAOYSA-N 0.000 claims description 7
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 6
- 229910021385 hard carbon Inorganic materials 0.000 claims description 6
- 239000007773 negative electrode material Substances 0.000 claims description 6
- 239000007774 positive electrode material Substances 0.000 claims description 6
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 claims description 6
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims description 5
- KGPPDNUWZNWPSI-UHFFFAOYSA-N flurotyl Chemical compound FC(F)(F)COCC(F)(F)F KGPPDNUWZNWPSI-UHFFFAOYSA-N 0.000 claims description 5
- VCCATSJUUVERFU-UHFFFAOYSA-N sodium bis(fluorosulfonyl)azanide Chemical compound FS(=O)(=O)N([Na])S(F)(=O)=O VCCATSJUUVERFU-UHFFFAOYSA-N 0.000 claims description 5
- DFUYAWQUODQGFF-UHFFFAOYSA-N 1-ethoxy-1,1,2,2,3,3,4,4,4-nonafluorobutane Chemical compound CCOC(F)(F)C(F)(F)C(F)(F)C(F)(F)F DFUYAWQUODQGFF-UHFFFAOYSA-N 0.000 claims description 4
- FNUBKINEQIEODM-UHFFFAOYSA-N 3,3,4,4,5,5,5-heptafluoropentanal Chemical compound FC(F)(F)C(F)(F)C(F)(F)CC=O FNUBKINEQIEODM-UHFFFAOYSA-N 0.000 claims description 4
- 229910002548 FeFe Inorganic materials 0.000 claims description 4
- ZMVMBTZRIMAUPN-UHFFFAOYSA-H [Na+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [Na+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O ZMVMBTZRIMAUPN-UHFFFAOYSA-H 0.000 claims description 4
- 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 4
- -1 phosphate ester Chemical class 0.000 claims description 4
- 229960003351 prussian blue Drugs 0.000 claims description 4
- 239000013225 prussian blue Substances 0.000 claims description 4
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 claims description 4
- ZMQDTYVODWKHNT-UHFFFAOYSA-N tris(2,2,2-trifluoroethyl) phosphate Chemical compound FC(F)(F)COP(=O)(OCC(F)(F)F)OCC(F)(F)F ZMQDTYVODWKHNT-UHFFFAOYSA-N 0.000 claims description 4
- 229910021201 NaFSI Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 claims description 2
- VEWLDLAARDMXSB-UHFFFAOYSA-N ethenyl sulfate;hydron Chemical compound OS(=O)(=O)OC=C VEWLDLAARDMXSB-UHFFFAOYSA-N 0.000 claims description 2
- XGPOMXSYOKFBHS-UHFFFAOYSA-M sodium;trifluoromethanesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C(F)(F)F XGPOMXSYOKFBHS-UHFFFAOYSA-M 0.000 claims description 2
- 229920001774 Perfluoroether Polymers 0.000 claims 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims 2
- 239000002000 Electrolyte additive Substances 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 229910052744 lithium Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 12
- 238000003756 stirring Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 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 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011245 gel electrolyte Substances 0.000 description 2
- 239000002608 ionic liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 150000005677 organic carbonates Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229910001488 sodium perchlorate Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
- H01M10/0566—Liquid materials
-
- 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
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
-
- 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
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
-
- 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
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- 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
- H01M10/058—Construction or manufacture
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the field of sodium ion secondary batteries, and provides a sodium ion battery electrolyte with a flame retardant function and a high-safety sodium ion battery. The organic phosphate solvent, the fluorinated ether diluent, the additive and the sodium salt are mixed to form the sodium-ion battery electrolyte with high flame-retardant property. The electrolyte can effectively improve the safety performance of the sodium ion battery, and the battery can still stably discharge, and does not catch fire or explode in a flame combustion test. In addition, under the multiplying power of 0.1C, the sodium-ion battery has higher coulombic efficiency, and the capacity retention rate of more than 80% is still kept after 120 cycles of circulation. The flame-retardant electrolyte can be used for preparing a sodium ion battery, the redox stability of the electrolyte is improved, the prepared sodium ion battery has good electrochemical performance and higher flame-retardant capability, and the potential safety hazard generated when the battery is in an accident can be effectively reduced.
Description
[ technical field ]: the invention relates to the technical field of secondary sodium ion batteries, in particular to a preparation method of an organic flame-retardant electrolyte and a safe sodium ion battery of a sodium ion battery.
[ technical background ]: with the rapid development of science and technology, people's demand for energy is continuously improved, intermittent renewable energy power generation technologies, such as wind energy, solar energy and wave power generation technologies, become more common and are integrated into the power grid, and it will become necessary to expand battery technologies to large-scale storage. However, as the number of battery safety accidents increases, the safety problem of the general sodium ion battery also becomes one of the primary concerns, mainly because sodium has higher chemical activity, so that the electrolyte has higher reaction activity and risk of combustion and explosion. Therefore, the use of a flame-retardant or nonflammable electrolyte is one of effective ways to improve the safety of a battery. The conventional organic carbonate electrolyte which is commercially available at present has high dielectric constant and excellent room temperature performance, but the characteristic of easy combustion is difficult to satisfy the safety characteristic of the sodium ion battery.
After examining a large number of relevant documents, the electrolytes capable of meeting the above requirements mainly include ionic liquids, solid electrolytes, gel electrolytes, phosphate esters, fluorinated ether electrolytes, and the like. However, from the viewpoint of economic cost and practical performance, the preparation cost of the ionic liquid is high, the process is complex, the conductivity of the solid electrolyte and the gel electrolyte is low, and the influence on the performance of the battery is large. The phosphate ester and fluorinated ether compounds have the characteristics of high flame retardant rate, environmental protection and low price, so the phosphate ester and fluorinated ether compounds are one of the choices of safe electrolyte solvents and cosolvents. According to the invention, the phosphate electrolyte and the fluorinated ether electrolyte are mixed according to a specific proportion and then applied to a sodium secondary battery system, and the prepared safe sodium ion battery has good non-combustible capability.
[ summary of the invention ]: the invention provides a preparation method of an organic flame-retardant electrolyte for a sodium-ion battery, aiming at improving the safety of the sodium-ion battery.
A preparation method of a flame-retardant sodium-ion battery electrolyte comprises the following steps:
mixing sodium salt and phosphate electrolyte to form basic electrolyte, and mixing fluorinated ether electrolyte with the basic electrolyte. And forming the sodium ion battery electrolyte with the flame retardant function, wherein the concentration of sodium salt is 1-1.5M.
In some of these embodiments, the sodium salt is selected from at least one of sodium bis (fluorosulfonyl) imide (NaFSI), sodium bis trifluoromethanesulfonylimide (NaTFSI), sodium trifluoromethanesulfonate (NaOTf).
In some of these embodiments, the phosphate electrolyte is derived from at least one of trimethyl phosphate (TMP), triethyl phosphate (TEP), tributyl phosphate (TBP), dimethyl methyl phosphate (DMMP), tris (2,2, 2-trifluoroethyl) phosphate (TTFP). In some of these embodiments, the fluorinated ether electrolyte is selected from at least one of bis (2,2, 2-trifluoroethyl) ether (BTFE), 1,2, 2- tetrafluoroethyl 2,2,3, 3-tetrafluoropropyl ether (F-EPE), 1,2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether (HFE), methyl nonafluorobutyl ether (MFE), ethyl nonafluorobutyl ether (EFE).
In some of these embodiments, the additive is selected from at least one of fluoroethylene carbonate (FEC), Vinylene Carbonate (VC), 1, 3-Propane Sultone (PS), and vinyl Sulfate (SN).
In some embodiments, the mole fraction of the sodium salt in the sodium-ion battery flame-retardant electrolyte is 0.9-2 mol/L.
In some embodiments, in the flame-retardant electrolyte for a sodium-ion battery, the mass percent of the sodium salt is 10% to 40%, the mass percent of the phosphate electrolyte is 10% to 50%, the mass percent of the fluorinated ether electrolyte is 5% to 60%, and the mass percent of the additive is 0.5% to 5%.
[ description of drawings ]:
fig. 1 is a flammability test of a conventional carbonate electrolyte.
FIG. 2 shows the flammability test of the electrolyte of example 1.
Fig. 3 is a test of a combustion experiment of the safety sodium ion battery prepared in example 1 using an external flame to burn a cell.
Fig. 4 is a graph showing cycle data of 2.0 to 3.7V using the safe sodium-ion battery prepared in example 1.
[ embodiments ] of the present invention: the present invention is further illustrated by the following examples, but the present invention is not limited to the following examples.
In the present description, all conductive sodium salts used are of battery grade and the solvents are of analytical purity. All the solvents are purified to the purity (mass fraction) of 99.9% by adopting a method of rectification combined with molecular sieve adsorption (a gas chromatograph used for analysis is GC-14C, Shimadzu Japan). Water and hydrofluoric acid in the electrolyte) are both lower than 20ppm, and are respectively measured by a Karl Fisher moisture meter 915KF Ti-Touch (Switzerland Wantong) and a full-automatic potential titrator 916Ti-Touch (Switzerland Wantong). The electrolyte preparation and the battery assembly were carried out in a glove box filled with high purity argon (water oxygen content below 1 ppm).
Example 1
Weighing 1.5g of NaTFSI, firstly dissolving the NaTFSI in 1.5g of TMP solution, thermally stirring the solution for 0.5h on a magnetic stirrer at the temperature of 40 ℃, then adding 3g of BTFE solvent and 0.12g of VC additive, and then stirring the solution for 1h at room temperature until the solution is uniformly mixed to obtain the sodium-ion battery electrolyte with the flame retardant function. Wherein the molar concentration of NaTFSI is 1.5 mol/L. Finally, injecting the electrolyte into a positive electrode material of sodium vanadium phosphate (Na)3V2(PO4)3) And the negative electrode material is a commercial hard carbon soft package battery.
Example 2
Weighing 1.5g of NaTFSI, firstly dissolving in 1.7g of TEP solution, thermally stirring for 0.5h on a magnetic stirrer at 40 ℃, then adding 3.8g of HFE solvent and 0.14g of FEC additive, and then stirring for 1h at room temperature until the solution is uniformly mixed to obtain the sodium-ion battery electrolyte with the flame retardant function. Wherein the moles of NaTFSIThe concentration was 1.4 mol/L. Finally, injecting the electrolyte into a positive electrode material of sodium vanadium phosphate (Na)3V2(PO4)3) And the negative electrode material is a commercial hard carbon soft package battery.
Example 3
Weighing 1.5g of NaFSI, dissolving in 4.5g of TEP solution, thermally stirring for 0.5h on a magnetic stirrer at 40 ℃, adding 9.5g of HFE solvent and 0.31g of VC additive, and stirring for 1h at room temperature until the solution is uniformly mixed to obtain the sodium-ion battery electrolyte with the flame retardant function. Wherein NaClO4The molar concentration of (A) is 1.1 mol/L. Finally, the electrolyte is injected into the positive electrode material Prussian blue (Na)2FeFe(CN)6) And the negative electrode material is a commercial hard carbon soft package battery.
Example 4
Weighing 1.5g of NaOTf, dissolving in 3g of TMP solution, stirring the solution for 0.5h on a magnetic stirrer at 40 ℃, adding 9g of HFE solvent and 0.27g of SN additive, and stirring the solution for 1h at room temperature until the solution is uniformly mixed to obtain the sodium-ion battery electrolyte with the flame retardant function. Wherein the molar concentration of NaOTf is 1 mol/L. Finally, the electrolyte is injected into the positive electrode material Prussian blue (Na)2FeFe(CN)6) And the negative electrode material is a commercial hard carbon soft package battery.
Claims (8)
1. A sodium ion battery electrolyte with a flame retardant function, which is characterized by comprising a sodium salt, a phosphate ester solvent, a fluorinated ether diluent and an electrolyte additive, and is prepared by the preparation method of the flame retardant electrolyte according to any one of claims 2 to 6.
2. The sodium-ion battery electrolyte with the flame retardant function according to claim 1, wherein the organic solvent comprises a phosphate ester solvent and fluoroether diluents, the phosphate ester accounts for 10-50% of the total mass of the electrolyte, and the fluoroether accounts for 5-50% of the total mass of the electrolyte.
3. The safe low-temperature sodium ion battery electrolyte with the flame retardant function according to claim 2, wherein the phosphate ester is at least one of trimethyl phosphate (TMP), triethyl phosphate (TEP), tributyl phosphate (TBP), dimethyl methyl phosphate (DMMP), and tris (2,2, 2-trifluoroethyl) phosphate (TTFP).
4. The safe low-temperature sodium ion battery electrolyte with the flame retardant function according to claim 2, wherein the fluoroether is at least one selected from bis (2,2, 2-trifluoroethyl) ether (BTFE), 1,2, 2-tetrafluoroethyl 2,2,3, 3-tetrafluoropropyl ether (F-EPE), 1,2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether (HFE), methyl nonafluorobutyl ether (MFE) and ethyl nonafluorobutyl ether (EFE).
5. The safe low-temperature sodium-ion battery electrolyte with the flame retardant function according to claim 1, wherein the additive is one or more selected from fluoroethylene carbonate (FEC), Vinylene Carbonate (VC), 1, 3-Propane Sultone (PS) and vinyl Sulfate (SN), and the additive accounts for 0.5-5% of the total mass of the electrolyte.
6. The safe low-temperature sodium-ion battery electrolyte with the flame retardant function according to claim 1, wherein the sodium salt is one or more of sodium bis (fluorosulfonyl) imide (NaFSI), sodium bis (trifluoromethanesulfonyl) imide (NaTFSI) and sodium trifluoromethanesulfonate (NaOTf), and the sodium salt accounts for 10-50% of the total mass of the electrolyte.
7. A preparation method of a safe sodium-ion battery is characterized by comprising the following steps:
the positive electrode material used was vanadium sodium phosphate (Na)3V2(PO4)3) Or Prussian blue (Na)2FeFe(CN)6) The negative electrode material, namely hard carbon, is prepared by injecting the electrolyte claimed in claim 1 into a battery, and then heating and standing the battery at 40 ℃ for 6 hours to obtain the safe sodium-ion battery.
8. Lithium battery, and method for manufacturing the sameCharacterized in that it comprises the flame-retardant electrolyte of claim 1 and the vanadium sodium phosphate (Na) of claim 73V2(PO4)3) Or Prussian blue (Na)2FeFe(CN)6) Positive electrode material and hard carbon negative electrode material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114865082A (en) * | 2022-05-18 | 2022-08-05 | 香河昆仑新能源材料股份有限公司 | Electrolyte containing fluorine substituted ether and battery composed of electrolyte |
| CN115663287A (en) * | 2022-12-13 | 2023-01-31 | 湖南法恩莱特新能源科技有限公司 | High-pressure-resistant flame-retardant sodium ion electrolyte, preparation method thereof and sodium ion battery |
| CN116072975A (en) * | 2023-03-21 | 2023-05-05 | 南开大学 | Phosphate flame-retardant electrolyte and lithium metal battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109786827A (en) * | 2018-02-12 | 2019-05-21 | 上海紫剑化工科技有限公司 | A kind of sodium-ion battery electrolyte, its additive, preparation method and application |
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| CN113555606A (en) * | 2021-06-10 | 2021-10-26 | 徐州浩华能源科技有限公司 | Low-temperature sodium ion battery electrolyte with flame retardant function |
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| CN109786827A (en) * | 2018-02-12 | 2019-05-21 | 上海紫剑化工科技有限公司 | A kind of sodium-ion battery electrolyte, its additive, preparation method and application |
| CN110518287A (en) * | 2019-07-03 | 2019-11-29 | 上海紫剑化工科技有限公司 | Sodium ion electrolyte, secondary cell and preparation method and application |
| CN113013492A (en) * | 2021-04-23 | 2021-06-22 | 武汉理工大学 | Organic electrolyte with wide working temperature zone and sodium ion battery |
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| CN114865082A (en) * | 2022-05-18 | 2022-08-05 | 香河昆仑新能源材料股份有限公司 | Electrolyte containing fluorine substituted ether and battery composed of electrolyte |
| CN115663287A (en) * | 2022-12-13 | 2023-01-31 | 湖南法恩莱特新能源科技有限公司 | High-pressure-resistant flame-retardant sodium ion electrolyte, preparation method thereof and sodium ion battery |
| CN115663287B (en) * | 2022-12-13 | 2023-04-04 | 湖南法恩莱特新能源科技有限公司 | High-pressure-resistant flame-retardant sodium ion electrolyte, preparation method thereof and sodium ion battery |
| CN116072975A (en) * | 2023-03-21 | 2023-05-05 | 南开大学 | Phosphate flame-retardant electrolyte and lithium metal battery |
| CN116072975B (en) * | 2023-03-21 | 2023-05-30 | 南开大学 | Phosphate flame-retardant electrolyte and lithium metal battery |
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