CN112687950A - Application of diphenylamine in lithium ion battery electrolyte, lithium ion battery electrolyte and lithium ion battery - Google Patents
Application of diphenylamine in lithium ion battery electrolyte, lithium ion battery electrolyte and lithium ion battery Download PDFInfo
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- CN112687950A CN112687950A CN201910996767.7A CN201910996767A CN112687950A CN 112687950 A CN112687950 A CN 112687950A CN 201910996767 A CN201910996767 A CN 201910996767A CN 112687950 A CN112687950 A CN 112687950A
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- electrolyte
- lithium ion
- ion battery
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- diphenylamine
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- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000003792 electrolyte Substances 0.000 title claims abstract description 48
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 41
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 13
- 239000000654 additive Substances 0.000 claims description 13
- 230000000996 additive effect Effects 0.000 claims description 11
- 229910003002 lithium salt Inorganic materials 0.000 claims description 8
- 159000000002 lithium salts Chemical class 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 7
- 150000002367 halogens Chemical class 0.000 claims description 7
- 229910052794 bromium Inorganic materials 0.000 claims description 5
- 229910052801 chlorine Inorganic materials 0.000 claims description 5
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 5
- FSSPGSAQUIYDCN-UHFFFAOYSA-N 1,3-Propane sultone Chemical compound O=S1(=O)CCCO1 FSSPGSAQUIYDCN-UHFFFAOYSA-N 0.000 claims description 4
- 229910001290 LiPF6 Inorganic materials 0.000 claims description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 4
- 239000008151 electrolyte solution Substances 0.000 claims description 4
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 4
- MHYFEEDKONKGEB-UHFFFAOYSA-N oxathiane 2,2-dioxide Chemical compound O=S1(=O)CCCCO1 MHYFEEDKONKGEB-UHFFFAOYSA-N 0.000 claims description 4
- YTZKOQUCBOVLHL-UHFFFAOYSA-N tert-butylbenzene Chemical compound CC(C)(C)C1=CC=CC=C1 YTZKOQUCBOVLHL-UHFFFAOYSA-N 0.000 claims description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 3
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 3
- GWAOOGWHPITOEY-UHFFFAOYSA-N 1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide Chemical compound O=S1(=O)CS(=O)(=O)OCO1 GWAOOGWHPITOEY-UHFFFAOYSA-N 0.000 claims description 2
- IFDLFCDWOFLKEB-UHFFFAOYSA-N 2-methylbutylbenzene Chemical compound CCC(C)CC1=CC=CC=C1 IFDLFCDWOFLKEB-UHFFFAOYSA-N 0.000 claims description 2
- 229910013385 LiN(SO2C2F5)2 Inorganic materials 0.000 claims description 2
- 229910013406 LiN(SO2CF3)2 Inorganic materials 0.000 claims description 2
- 229910013426 LiN(SO2F)2 Inorganic materials 0.000 claims description 2
- 235000010290 biphenyl Nutrition 0.000 claims description 2
- 239000004305 biphenyl Substances 0.000 claims description 2
- HHNHBFLGXIUXCM-GFCCVEGCSA-N cyclohexylbenzene Chemical compound [CH]1CCCC[C@@H]1C1=CC=CC=C1 HHNHBFLGXIUXCM-GFCCVEGCSA-N 0.000 claims description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 2
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 claims description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 claims description 2
- 229910001486 lithium perchlorate Inorganic materials 0.000 claims description 2
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims 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 claims description 2
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 9
- 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 group 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 abstract description 8
- 238000002360 preparation method Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 9
- 239000003063 flame retardant Substances 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 235000009161 Espostoa lanata Nutrition 0.000 description 3
- 240000001624 Espostoa lanata Species 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- HXBVONWDRVMGCI-UHFFFAOYSA-N 1,3-dioxol-2-one ethene Chemical compound C=C.C1(OC=CO1)=O HXBVONWDRVMGCI-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910001228 Li[Ni1/3Co1/3Mn1/3]O2 (NCM 111) Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 101150047356 dec-1 gene Proteins 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004804 winding Methods 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
Landscapes
- Secondary Cells (AREA)
Abstract
The invention relates to the field of batteries, and discloses application of diphenylamine in lithium ion battery electrolyte, the lithium ion battery electrolyte and a lithium ion battery. When the diphenylamine shown in the formula (I) is used in the electrolyte of a lithium ion battery, the high-temperature storage performance and the flame retardant function of the electrolyte can be improved, and the negative influence on the performance of the battery is small.
Description
Technical Field
The invention relates to the field of batteries, in particular to application of diphenylamine in lithium ion battery electrolyte, lithium ion battery electrolyte containing diphenylamine and a lithium ion battery containing the lithium ion battery electrolyte.
Background
The energy crisis and the increasingly serious environmental pollution make the automobile technology undergo the major technological changes of fuel diversification, power electric gasification and the like.
The lithium ion battery is unique due to the characteristics of high energy density, long service life, high working voltage, environmental protection and the like, and becomes a key development direction of energy sources for new energy automobiles at present.
Meanwhile, safety issues also become a significant challenge for lithium ion batteries. Overcharge of the battery may cause rapid deterioration of performance of the lithium ion battery, and in severe cases, may increase the possibility of fire and explosion of the lithium ion battery.
In view of this, it is necessary to study the safety performance of the lithium ion battery.
Disclosure of Invention
The invention aims to overcome the defects of poor high-temperature storage performance and poor flame retardant performance of the lithium ion battery electrolyte in the prior art.
In order to achieve the above object, a first aspect of the present invention provides the use of diphenylamine represented by the formula (I):
wherein, in the formula (I), X1And X2Each independently selected from halogen.
The second aspect of the invention provides an electrolyte of a lithium ion battery, which contains lithium salt, an organic solvent and at least one diphenylamine shown in a formula (I),
wherein, in the formula (I), X1And X2Each independently selected from halogen.
In a third aspect, the present invention provides a lithium ion battery comprising the electrolyte solution according to the second aspect of the present invention.
When the diphenylamine shown in the formula (I) is used in the electrolyte of a lithium ion battery, the high-temperature storage performance and the flame retardant function of the electrolyte can be improved, and the negative influence on the performance of the battery is small.
Detailed Description
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
As previously mentioned, a first aspect of the present invention provides the use of a diphenylamine of formula (I):
wherein, in the formula (I), X1And X2Each independently selected from halogen.
The halogen of the present invention includes fluorine, chlorine, bromine, iodine.
Preferably, in formula (I), X1And X2Each independently selected from F, Cl, Br.
Particularly preferably, in the formula (I), X1And X2Is F.
As described above, the second aspect of the present invention provides an electrolyte for a lithium ion battery, which contains a lithium salt, an organic solvent and at least one diphenylamine of formula (I),
wherein, in the formula (I), X1And X2Each independently selected from halogen.
In the second aspect of the present invention, in the formula (I), X is preferred1And X2Each independently selected from F, Cl, Br; more preferably in formula (I), X1And X2Is F.
According to a particularly preferred embodiment, the total content of diphenylamine represented by the formula (I) in the electrolyte is 0.1 to 20% by weight, more preferably 0.1 to 5% by weight.
Preferably, in the electrolyte, the concentration of the lithium salt is 0.1 to 2mol/L in terms of lithium ion content.
Preferably, the lithium salt is selected from LiPF6、LiBF4、LiAsF6、LiClO4、LiN(SO2CF3)2、LiN(SO2C2F5)2、LiN(SO2F)2、LiSO3CF3At least one of (1).
Preferably, the organic solvent is at least one selected from the group consisting of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate.
According to another preferred embodiment, the electrolyte solution further contains at least one additive selected from the group consisting of vinylene carbonate, 1, 3-propane sultone, ethylene vinylene carbonate, 1, 3-propene sultone, methylene methanedisulfonate, 1, 4-butane sultone, biphenyl, fluorobenzene, cyclohexylbenzene, tert-butylbenzene, hexamethyldisilazane and heptamethyldisilamine.
Preferably, the total content of the additives in the electrolyte is 0.5-10 wt%.
As described above, the third aspect of the present invention provides a lithium ion battery containing the electrolyte solution described in the second aspect of the present invention.
The components of the lithium ion battery of the third aspect are not particularly limited by the present invention and may be selected conventionally in the art, and the present invention is improved primarily by providing a new electrolyte, and other suitable components of the lithium ion battery of the present invention will be readily apparent to those skilled in the art from the description herein, in conjunction with the prior art in the field. The person skilled in the art should not be construed as limiting the invention.
Further, the present invention has no particular requirements on the preparation method of the battery electrolyte, the preparation method of the battery, etc., and those skilled in the art can determine an appropriate corresponding preparation method according to the specific methods provided in the following examples of the present invention based on the knowledge in the art, and the person skilled in the art should not be construed as limiting the present invention.
The present invention will be described in detail below by way of examples. In the following examples, various materials used are commercially available without specific mention. Unless otherwise specified, each raw material was analytically pure.
Example 1
Preparation of the electrolyte
Under the drying condition, ethylene carbonate, propylene carbonate and diethyl carbonate are mixed according to the weight ratio of EC: PC: mixing DEC 1:1:1 to obtain a mixed solvent, and adding lithium salt LiPF6Dissolving in the mixed solvent, adding diphenylamine and additive components, and stirring uniformly. Wherein, LiPF6The concentration of the additive is 1mol/L, the additive component is vinylene carbonate, and X in diphenylamine1And X2Both are F, the vinylene carbonate and the diphenylamine contents being 0.5% and 0.5% by weight, respectively.
Battery fabrication
Preparing a positive electrode: mixing 96 percent of LiNi1/3Co1/3Mn1/3O2And 2% of PVDF and 2% of conductive graphite are fully stirred and uniformly mixed in N-methyl pyrrolidone, and then the mixture is coated on an aluminum foil for drying, compression and cutting to prepare the battery anode.
Preparing a negative electrode: according to the weight percentage, 95% of graphite negative electrode material, 3% of PVDF and 2% of conductive graphite are fully stirred and mixed evenly in N-methyl pyrrolidone, and then coated on copper foil for drying, compressing and cutting to obtain the battery negative electrode.
Preparing a lithium ion battery: and sequentially stacking the positive pole piece, the isolating membrane and the negative pole piece, and winding to obtain the electrode assembly. And (3) placing the electrode assembly in an outer package, injecting the prepared electrolyte and packaging to obtain the lithium ion battery A1.
Comparative example 1
The same procedure as in example 1 was conducted, except that, in the preparation of the electrolyte, the diphenylamine structure was not added in this comparative example, and the additive component was vinylene carbonate having a vinylene carbonate content of 0.5 wt%.
The remaining operations were the same as in example 1, to obtain a lithium ion battery D1.
Comparative example 2
The same procedure as in example 1 was conducted, except that, in the preparation of the electrolyte, the diphenylamine structure was not added in this comparative example, and the additive component was vinylene carbonate having a vinylene carbonate content of 1% by weight.
The remaining operations were the same as in example 1, to obtain a lithium ion battery D2.
Example 2
The procedure was carried out in the same manner as in example 1, except that, in the preparation of an electrolyte, the additive component in this example was 1, 3-propanesultone, X in diphenylamine1And X2The contents of both F, 1, 3-propane sultone and diphenylamine were 10 wt.% and 20 wt.%, respectively.
The remaining operations were the same as in example 1, to obtain lithium ion battery a 2.
Example 3
The procedure was carried out in the same manner as in example 1, except that, in the preparation of an electrolyte, the additive component in this example was 1, 4-butanesultone, X in diphenylamine1And X2The contents of both F, 1, 4-butanesultone and diphenylamine were 2% by weight and 0.1% by weight, respectively.
The remaining operations were the same as in example 1, to obtain lithium ion battery a 3.
Example 4
The procedure was carried out in the same manner as in example 1, except that, in the preparation of an electrolyte, the additive component in this example was vinylene carbonate, X in diphenylamine1And X2Both are F, the vinylene carbonate and diphenylamine contents being 0.5% and 0.05% by weight, respectively.
The remaining operations were the same as in example 1, to obtain lithium ion battery a 4.
Example 5
The procedure was carried out in the same manner as in example 1, except that, in the preparation of an electrolyte, the additive component in this example was vinylene carbonate, X in diphenylamine1And X2Both of which are F, the vinylene carbonate and the diphenylamine contents being 0.5 wt% and 25 wt%, respectively.
The remaining operations were the same as in example 1, to obtain lithium ion battery a 5.
Example 6
The procedure was carried out in the same manner as in example 1, except that, in the preparation of an electrolyte, X in diphenylamine in the present example1And X2Are all Cl.
The remaining operations were the same as in example 1, to obtain lithium ion battery a 6.
Test example
And (3) testing the flame retardant property of the electrolyte:
the method comprises the steps of preparing glass fiber cotton into glass cotton balls with the diameter of 3-5 mm, after the glass cotton balls are fully soaked in electrolyte to be tested, rapidly igniting the glass cotton balls by using an ignition device, recording the time from the movement of the ignition device to the automatic extinguishment of flame, wherein the time is called self-extinguishment time, comparing the flame retardant performances of different electrolytes according to the self-extinguishment time of unit mass of the electrolyte, carrying out parallel test for 3 times, averaging, and recording results in a table 1.
Testing the high-temperature storage performance of the battery:
the cell was fully charged in a 0.5C-rate constant current/constant voltage manner, and then placed in an oven at 60 ℃ for 35 days, tested and calculated to obtain the thickness expansion rate and the capacity retention rate, and the results are listed in table 1.
Thickness expansion rate (thickness after storage/thickness before storage-1) × 100%.
Capacity retention rate ═ discharge capacity after storage/discharge capacity before storage × 100%
TABLE 1
From the above results, it can be seen that the electrolyte of the present invention containing diphenylamine has good flame retardant properties, and further, the flame retardant effect of the electrolyte will be improved with the increase of the amount of diphenylamine added. Meanwhile, in the aspect of improving the high-temperature storage performance, the functional additive of diphenylamine can achieve the improvement effect only by very low addition amount, and the improvement effect cannot be further improved by excessive addition.
Particularly, the battery adopting the electrolyte has the obviously better effect of taking high-temperature storage performance and flame retardant performance into consideration.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (10)
1. The application of diphenylamine shown in the formula (I) in lithium ion battery electrolyte is as follows:
wherein, in the formula (I), X1And X2Each independently selected from halogen.
2. Use according to claim 1, wherein, in formula (I), X1And X2Each independently selected from F, Cl, Br;
preferably, in formula (I), X1And X2Is F.
3. The electrolyte of the lithium ion battery is characterized by comprising lithium salt, an organic solvent and at least one diphenylamine shown in a formula (I),
wherein, in the formula (I), X1And X2Each independently selected from halogen;
preferably, in formula (I), X1And X2Each independently selected from F, Cl, Br;
preferably, in formula (I), X1And X2Is F.
4. The electrolyte according to claim 3, wherein the total content of diphenylamine of the formula (I) is 0.1 to 20% by weight, preferably 0.1 to 5% by weight, in the electrolyte.
5. The electrolyte according to claim 3 or 4, wherein the concentration of the lithium salt in the electrolyte is 0.1 to 2mol/L in terms of lithium ion content.
6. The electrolyte of any of claims 3-5, wherein the lithium salt is selected from LiPF6、LiBF4、LiAsF6、LiClO4、LiN(SO2CF3)2、LiN(SO2C2F5)2、LiN(SO2F)2、LiSO3CF3At least one of (1).
7. The electrolyte of any one of claims 3-5, wherein the organic solvent is selected from at least one of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, and ethyl methyl carbonate.
8. The electrolytic solution according to any one of claims 3 to 7, further comprising at least one additive selected from the group consisting of vinylene carbonate, 1, 3-propane sultone, vinylene carbonate, 1, 3-propene sultone, methylene methanedisulfonate, 1, 4-butane sultone, biphenyl, fluorobenzene, cyclohexylbenzene, t-butylbenzene, hexamethyldisilazane and heptamethyldisilamine.
9. The electrolyte of claim 8, wherein the total content of the additives in the electrolyte is 0.5 to 10 wt%.
10. A lithium ion battery comprising the electrolyte of any one of claims 3 to 9.
Priority Applications (1)
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| CN201910996767.7A CN112687950B (en) | 2019-10-19 | 2019-10-19 | Application of diphenylamine in lithium ion battery electrolyte, lithium ion battery electrolyte and lithium ion battery |
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| CN201910996767.7A CN112687950B (en) | 2019-10-19 | 2019-10-19 | Application of diphenylamine in lithium ion battery electrolyte, lithium ion battery electrolyte and lithium ion battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120565814A (en) * | 2025-07-30 | 2025-08-29 | 江苏隐功科技有限公司 | Gaseous flame-retardant electrolyte, battery and electrical equipment |
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| CN112687950B (en) | 2022-01-04 |
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