CN110783628A - Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same - Google Patents
Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same Download PDFInfo
- Publication number
- CN110783628A CN110783628A CN201911040488.XA CN201911040488A CN110783628A CN 110783628 A CN110783628 A CN 110783628A CN 201911040488 A CN201911040488 A CN 201911040488A CN 110783628 A CN110783628 A CN 110783628A
- Authority
- CN
- China
- Prior art keywords
- lithium
- lithium ion
- ion battery
- electrolytic solution
- nonaqueous electrolytic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- 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 provides a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same. The compound shown in the formula 1 is adopted as the additive, and the compound shown in the formula 1 contains a nitrile group, so that the compound can be well complexed with transition metal ions on the surface of lithium cobaltate or a ternary positive electrode, the surface of the positive electrode is stabilized, side reactions of the transition metal ions in a high oxidation state and electrolyte under high voltage are inhibited, the dissolution of the transition metal ions is inhibited, and the high-temperature storage and cycle performance of the battery are improved.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery materials, and particularly relates to a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same.
Background
Since commercialization, lithium ion batteries have been widely used in the fields of digital, energy storage, power, military space and communication equipment, due to their portability, high specific energy, no memory effect, and good cycle performance. With the wide application of lithium ion batteries, consumers have made higher demands on the energy density, cycle life, high temperature performance, safety and other performances of lithium ion batteries.
The ways of improving the energy density mainly include, on one hand, increasing the charging voltage of the battery, adopting a positive electrode with higher charging voltage, increasing the voltage of the existing battery by adopting a process, or adopting a high-capacity high-nickel positive electrode or lithium-rich positive electrode material, such as 4.2V LCO or NMC523 and the like to increase the voltage to 4.25V, 4.35V, 4.4V, 4.45V or even higher, and NMC622, NMC811, NCA, LiMnPO
4、LiNiPO
4、LiNi
1.5Mn
0.5O
2And the like cathode materials; on the other hand, negative electrode materials such as silicon carbon with high energy density can be adopted; the energy density is also increased by reducing or thinning the thickness of the main material such as aluminum plastic film, diaphragm, aluminum foil, copper foil, etc., and by increasing the compaction and surface density of the positive and negative electrodes. However, the surface of the anode is unstable under high voltage or by adopting a high-nickel anode material, transition metal ions in a high oxidation state are unstable, and the transition metal ions are easy to dissolve out, and the high-nickel anode also has the problems of oxygen evolution, particle breakage and the like; in the negative electrode, the transition metal ions dissolved out and transferred to the negative electrode can damage a negative electrode SEI film, and then the transition metal ions are easily decomposed at high temperature, and in addition, the SEI film on the surface of the silicon-carbon negative electrode is unstable, the volume expansion is large, and the transition metal ions are easily damaged in the charging and discharging processes, so the performances of the battery such as cycle and high-temperature storage are required to be improved. The electrolyte is an important factor for improving the performance of the lithium ion battery, and the electrolyte additive is a key component in the electrolyte, so that the influence of each additive on each performance of the battery is mastered, and then the electrolyte meeting the requirements is developed by combining and optimizing the solvent, the lithium salt, the additive and the like and matching with a corresponding battery system.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same. The electrolyte contains one or more than two of the compounds shown in the formula 1 and a lithium salt additive, so that the cycle performance and the high-temperature storage performance of the lithium ion battery can be improved.
The purpose of the invention is realized by the following technical scheme:
a lithium ion battery non-aqueous electrolyte comprises one or more than two of lithium salt, a non-aqueous organic solvent, a lithium salt additive and a compound shown as a formula 1:
wherein R is
1、R
2、R
3、R
4、R
5Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more R
aSubstituted of the following groups: c
1-6Alkyl radical, C
1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each R
aIdentical or different, independently of one another, from halogen, C
1-6Alkyl radical, C
1-6An alkoxy group;
wherein the lithium salt type additive comprises lithium bis (fluorosulfonyl) imide (LiFSI), lithium difluoro (oxalato) borate (LiODFB), and lithium difluoro (LiPO) phosphate
2F
2) And lithium bistrifluoromethylsulfonyl imide (LiTFSI).
According to the invention, R
1、R
2、R
3Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more R
aSubstituted of the following groups: c
1-6Alkyl radical, C
1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each R
aIdentical or different, independently of one another, from halogen, C
1-6Alkyl radical, C
1-6An alkoxy group.
According to the invention, R
4、R
5Selected from hydrogen.
According to the invention, n is 1,2, 3, 4 or 5.
According to the invention, R
1、R
2、R
3Identical or different, independently of one another, from the group consisting of hydrogen, halogen, methyl, ethyl, trimethylsiloxy, trifluoromethyl.
According to the invention, the compound represented by formula 1 is specifically selected from at least one of the following compounds:
the term "halogen" refers to F, Cl, Br and I. In other words, F, Cl, Br, and I may be described as "halogen" in the present specification.
The term "C
1-6Alkyl is understood to preferably mean a straight-chain or branched, saturated monovalent hydrocarbon radical having from 1 to 6 carbon atoms, preferably C
1-5An alkyl group. "C
1-6Alkyl "is understood to preferably mean a straight-chain or branched, saturated monovalent hydrocarbon radical having 1,2, 3, 4, 5 or 6 carbon atoms. The alkyl group is, for example, a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an isopropyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, an isopentyl group, a 2-methylbutyl group, a 1-ethylpropyl group, a 1, 2-dimethylpropyl group, a neopentyl group, a 1, 1-dimethylpropyl group, a 4-methylpentyl group, a 3-methylpentyl group, a 2-ethylbutyl group, a 1-ethylbutyl group, a 3, 3-dimethylbutyl group, a 2, 2-dimethylbutyl group, a 1, 1-dimethylbutyl group, a 2, 3-dimethylbutyl group, a 1, 3-dimethylbutyl group or a 1, 2-dimethylbutyl group. In particular, such groups are, for example, methyl, ethyl, propyl, butyl, isopropyl, isobutyl, sec-butyl, tert-butyl, more particularly such groups having 1,2 or 3 carbon atoms ("C)
1-3Alkyl groups) such as methyl, ethyl, n-propyl or isopropyl.
As used herein, the term "alkyl" in "alkoxy" is as defined above.
According to the invention, the content of the compound represented by the formula 1 is 0.1 to 10 wt%, for example, 0.1 wt%, 0.2 wt%, 0.5 wt%, 1.0 wt%, 1.2 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt% based on the total mass of the lithium ion battery nonaqueous electrolyte.
According to the invention, the content of the lithium salt type additive is 0.1-10 wt%, for example, 0.1 wt%, 0.2 wt%, 0.5 wt%, 1.0 wt%, 1.2 wt%, 1.5 wt%, 2.0 wt%, 2.5 wt%, 3 wt%, 4 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt% of the total mass of the lithium ion battery nonaqueous electrolyte.
According to the invention, the lithium salt is selected from lithium hexafluorophosphate (LiPF)
6) Lithium tetrafluoroborate (LiBF)
4) Lithium bis (oxalato) borate (LiBOB), lithium hexafluoroantimonate (LiSbF)
6) Lithium hexafluoroarsenate (LiAsF)
6) Lithium bis (trifluoromethylsulfonyl) imide (LiN (SO)
2CF
3)
2)、LiN(SO
2C
2F
5)
2Tris (trifluoromethylsulfonyl) methyllithium (LiC (SO)
2CF
3)
3) Or lithium bis (trifluoromethylsulfonyl) imide (LiN (CF)
3SO
2)
2) One or more than two of them.
According to the invention, the content of the lithium salt is 8-18 wt%, for example 8 wt%, 9 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt% of the total mass of the lithium ion battery nonaqueous electrolyte.
According to the invention, the non-aqueous organic solvent is selected from carbonate and/or carboxylic ester, and the carbonate is selected from one or more of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate; the carboxylic ester is selected from one or more of propyl acetate, n-butyl acetate, isobutyl acetate, n-amyl acetate, isoamyl acetate, ethyl propionate, n-propyl propionate, methyl butyrate, ethyl n-butyrate or fluoro solvents of the above solvents.
The invention also provides a preparation method of the non-aqueous electrolyte of the lithium ion battery, which comprises the following steps:
and mixing one or more of lithium salt, a nonaqueous organic solvent, a lithium salt type additive and a compound shown in a formula 1 to prepare the lithium ion battery nonaqueous electrolyte.
The invention also provides a lithium ion battery, which comprises the lithium ion battery non-aqueous electrolyte.
According to the present invention, the lithium ion battery further includes a positive electrode sheet containing a positive electrode active material, a negative electrode sheet containing a negative electrode active material, and a lithium ion separator.
According to the invention, the positive active material is selected from one or more of layered lithium composite oxide, lithium manganate and lithium cobaltate mixed ternary materials; the chemical formula of the layered lithium composite oxide is Li
1+xNi
yCo
zM
(1-y-z)Y
2Wherein x is more than or equal to-0.1 and less than or equal to 1; y is more than or equal to 0 and less than or equal to 1, z is more than or equal to 0 and less than or equal to 1, and y + z is more than or equal to 0 and less than or equal to 1; wherein M is one or more of Mg, Zn, Ga, Ba, Al, Fe, Cr, Sn, V, Mn, Sc, Ti, Nb, Mo and Zr; y is one or more of O, F, P.
According to the invention, the negative active material is selected from one or more of carbon materials, silicon-based materials, tin-based materials or alloy materials corresponding to the carbon materials, the silicon-based materials and the tin-based materials.
According to the invention, the working voltage range of the lithium ion battery is 4.2V and above.
The invention has the beneficial effects that:
the invention provides a lithium ion battery non-aqueous electrolyte and a lithium ion battery using the same. The compound shown in the formula 1 is adopted as the additive, and the compound shown in the formula 1 contains a nitrile group, so that the compound can be well complexed with transition metal ions on the surface of lithium cobaltate or a ternary positive electrode, the surface of the positive electrode is stabilized, side reactions of the transition metal ions in a high oxidation state and electrolyte at high voltage are inhibited, and the dissolution of the transition metal ions is inhibited. Meanwhile, lithium salt type additivesSuch as LiFSI and LiTFSI, can improve high temperature and cycle performance, LiODFB or LiPO
2F
2The impedance of the battery can be reduced, and the combination of the compound in the structural formula 1 and the lithium salt additive can improve the cycle performance and the high-temperature storage performance of the battery and simultaneously give consideration to the low-temperature charging and discharging performance through the synergistic effect of the compound and the lithium salt additive.
Detailed Description
The preparation method of the present invention will be described in further detail with reference to specific examples. It is to be understood that the following examples are only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
Comparative example 1
(1) Preparation of positive plate
Mixing a positive electrode active material 4.25V Lithium Cobaltate (LCO), a binder polyvinylidene fluoride (PVDF) and a conductive agent acetylene black according to a weight ratio of 97:1.5:1.5, adding N-methyl pyrrolidone (NMP), and stirring under the action of a vacuum stirrer until a mixed system becomes a uniform and fluid positive electrode slurry; uniformly coating the positive electrode slurry on an aluminum foil with the thickness of 12 mu m; baking the coated aluminum foil in 5 sections of baking ovens with different temperature gradients, drying the aluminum foil in a baking oven at 120 ℃ for 10 hours, and rolling and cutting to obtain the required positive plate.
(2) Preparation of negative plate
Mixing a negative electrode active material graphite, a thickening agent sodium carboxymethyl cellulose, a binder styrene butadiene rubber and a conductive agent acetylene black according to a weight ratio of 97:1:1:1, adding deionized water, and obtaining negative electrode slurry under the action of a vacuum stirrer; uniformly coating the negative electrode slurry on a copper foil with the thickness of 9 mu m; and (3) airing the copper foil at room temperature, transferring the copper foil to an oven at 80 ℃ for drying for 11h, and then carrying out cold pressing and slitting to obtain the negative plate.
(3) Preparation of electrolyte
Mixing ethylene carbonate, propylene carbonate, diethyl carbonate and n-propyl propionate in a glove box filled with argon and having qualified water oxygen content according to the mass ratio of 25:10:15:50Homogenized (solvent and additives normalized) and then 12.8 wt% of fully dried lithium hexafluorophosphate (LiPF) was rapidly added to it
6) Dissolving the electrolyte in an organic solvent, uniformly stirring, and obtaining the electrolyte after the moisture and the free acid are detected to be qualified.
(4) Preparation of the separator
A polyethylene barrier film having a thickness of 8 μm (available from Asahi chemical Co., Ltd.) was used.
(5) Preparation of lithium ion battery
Stacking the prepared positive plate, the prepared isolating membrane and the prepared negative plate in sequence to ensure that the isolating membrane is positioned between the positive plate and the negative plate to play an isolating role, and then winding to obtain a naked battery cell without liquid injection; placing the bare cell in an outer packaging foil, injecting the prepared electrolyte into the dried bare cell, and performing vacuum packaging, standing, formation, shaping, sorting and other processes to obtain the required lithium ion battery.
(6) Normal temperature cycling experiment at 25 ℃:
thickness D of full-electricity cell before test
0Placing the battery in an environment of (25 +/-3) DEG C, standing for 3 hours, charging the battery to 4.1V according to 1C when the battery core body reaches (25 +/-3) DEG C, then charging to 4.25V at 0.7C, then charging to cut-off current at constant voltage of 4.25V to 0.05C, then discharging to 3V at 1C, and recording initial capacity Q
0When the circulation reaches the required times or the capacity decay rate is lower than 70 percent or the thickness exceeds the thickness required by the test, the previous discharge capacity is taken as the capacity Q of the battery
1Calculating capacity retention rate (%), taking out the battery full, standing for 3 hours at normal temperature, and testing full thickness D
1The thickness change rate (%) was calculated, and the results are shown in Table 2. The calculation formula used therein is as follows:
thickness change rate (%) - (D)
1-D
0)/D
0100% of the total weight; capacity retention (%) ═ Q
1/Q
0*100％。
(7) High temperature cycling experiment at 45 ℃:
thickness D of full-electricity cell before test
0Placing the battery in an environment of (45 +/-3) DEG C, standing for 3 hours until the electric core body reaches (45 +/-3) DEG CThe battery is charged to 4.25V at constant current of 0.7C and to cut-off current of 0.05C at constant voltage of 4.25V, and then discharged at 0.5C, and initial capacity Q is recorded
0And cycling in such a way that when the required number of cycles is reached or the capacity fading rate is lower than 70% or the thickness exceeds the thickness required by the test, the previous discharge capacity is taken as the capacity Q of the battery
1Calculating capacity retention rate (%), taking out the battery full charge and core, standing for 3 hr at normal temperature, and testing full charge thickness D
1The thickness change rate (%) was calculated, and the results are shown in Table 2. The calculation formula used therein is as follows:
thickness change rate (%) - (D)
1-D
0)/D
0100% of the total weight; capacity retention (%) ═ Q
1/Q
0*100％。
(8) High temperature storage experiment at 60 ℃:
the thickness D of the fully charged cell was measured at 25 deg.C
0Charging the formed battery to 4.1V according to 1C, then charging to 4.25V by 0.7C, then charging to 0.05C by 4.25V constant voltage, then discharging to 3.0V by 0.5C constant current, then charging to 4.1V by 1C, then charging to 4.25V by 0.7C, then charging to 0.05C by 4.25V constant voltage, placing in 60 ℃ environment for 14 days, and testing the full charge thickness D
1The thickness change rate (%) was calculated, and the results are shown in Table 2. The calculation formula used therein is as follows:
thickness change rate (%) - (D)
1-D
0)/D
0*100％。
Comparative examples 2 to 8 and examples 1 to 10
Comparative examples 2 to 8 and examples 1 to 10 were prepared in the same manner as in comparative example 1 except that the components and contents of the electrolyte were different, and the specific components and contents to be added were as shown in table 1 below.
TABLE 1 compositions and contents of electrolytes of examples 1 to 10 and comparative examples 1 to 8
| A2 | A4 | A6 | A10 | LiODFB | LiFSI | LiPO 2F 2 | |
| Comparative example 1 | |||||||
| Comparative example 2 | 1 | ||||||
| Comparative example 3 | 1 | ||||||
| Comparative example 4 | 1 | ||||||
| Comparative example 5 | 1 | ||||||
| Comparative example 6 | 0.5 | ||||||
| Comparative example 7 | 0.5 | ||||||
| Comparative example 8 | 0.5 | ||||||
| Example 1 | 1 | 0.5 | |||||
| Example 2 | 1 | 0.5 | |||||
| Example 3 | 1 | 0.5 | |||||
| Example 4 | 1 | 0.5 | |||||
| Example 5 | 1 | 0.5 | |||||
| Example 6 | 1 | 0.5 | |||||
| Example 7 | 1 | 0.5 | 0.5 | ||||
| Example 8 | 1 | 0.5 | 0.5 | ||||
| Example 9 | 1 | 0.5 | 0.5 | ||||
| Example 10 | 1 | 0.5 | 0.5 | 0.5 |
Remarking: wherein the content of each component is in wt%.
TABLE 2 examples 1-14 and comparative examples 1-9 are experimental results of cell comparison
As can be seen from table 2, the batteries prepared in the examples of the present application all achieve better electrical properties, and the specific analysis is as follows:
it can be seen from comparative examples 2 to 8 and comparative example 1 that, compared with the blank, the cycle and high-temperature storage performance of the battery can be significantly improved by adding the compound containing the structural formula 1, the cycle and high-temperature storage performance of the battery can be significantly improved by LiFSI, LiODFB and LiPO
2F
2The cycle performance of the battery can be improved;
by comparing comparative example 2 or comparative example 6 with example 1, it can be seen that the combination of LiODFB or the compound of formula 1 improves the cycle performance capacity retention rate and the combination of LiODFB and the compound of formula 1 relatively improves the cycle and high temperature storage properties, compared to the single combination;
from comparative examples 2 to 5 and comparative example 6 and examples 2 to 6, it was found that the combination of the compound of formula 1 and LiFSI can further improve the cycle and high-temperature storage properties of the battery, compared to the single formula 1 or LiFSI;
from examples 7-8 and examples 1 and 3, it was found that the cycling or high temperature performance of the combination of a single compound of formula 1 and two lithium salts can be further improved compared to the combination of a single nitrile and a single lithium salt additive;
by comparing example 9 with example 1, it can be seen that the cycle thickness and storage properties can be further improved by a single lithium salt additive in combination with 2 compounds of formula 1;
by comparing example 9 with example 10, it can be seen that the combination of two compounds of formula 1 and two lithium salt additives can further improve the cycling performance compared to the combination with a single lithium salt.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A lithium ion battery non-aqueous electrolyte comprises one or more than two of lithium salt, a non-aqueous organic solvent, a lithium salt additive and a compound shown as a formula 1:
wherein R is
1、R
2、R
3、R
4、R
5Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more R
aSubstituted of the following groups: c
1-6Alkyl radical, C
1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each R
aIdentical or different, independently of one another, from halogen, C
1-6Alkyl radical, C
1-6An alkoxy group;
wherein the lithium salt type additive comprises lithium bis (fluorosulfonyl) imide (LiFSI), lithium difluoro (oxalato) borate (LiODFB), and lithium difluoro (LiPO) phosphate
2F
2) And lithium bistrifluoromethylsulfonyl imide (LiTFSI).
2. The nonaqueous electrolytic solution of claim 1, wherein R is
1、R
2、R
3Identical or different, independently of one another, from hydrogen, halogen, unsubstituted or optionally substituted by one, two or more R
aSubstituted of the following groups: c
1-6Alkyl radical, C
1-6An alkoxy group; r is selected from C or Si; n is an integer between 1 and 5;
each R
aIdentical or different, independently of one another, from halogen, C
1-6Alkyl radical, C
1-6An alkoxy group.
3. The nonaqueous electrolytic solution of claim 1 or 2, wherein R is
4、R
5Selected from hydrogen;
and/or n is 1,2, 3, 4 or 5;
and/or, R
1、R
2、R
3Identical or different, independently of one another, from the group consisting of hydrogen, halogen, methyl, ethyl, trimethylsiloxy, trifluoromethyl.
4. The nonaqueous electrolytic solution of any one of claims 1 to 3, wherein the compound represented by formula 1 is specifically selected from at least one of the following compounds:
5. the nonaqueous electrolytic solution of any one of claims 1 to 4, wherein the content of the compound represented by formula 1 is 0.1 to 10 wt% based on the total mass of the nonaqueous electrolytic solution for lithium ion batteries.
6. The nonaqueous electrolytic solution of any one of claims 1 to 5, wherein the content of the lithium salt type additive is 0.1 to 10 wt% based on the total mass of the nonaqueous electrolytic solution for lithium ion battery; the lithium salt is selected from lithium hexafluorophosphate (LiPF)
6) Lithium tetrafluoroborate (LiBF)
4) Lithium bis (oxalato) borate (LiBOB), lithium hexafluoroantimonate (LiSbF)
6) Lithium hexafluoroarsenate (LiAsF)
6) Lithium bis (trifluoromethylsulfonyl) imide (LiN (SO)
2CF
3)
2)、LiN(SO
2C
2F
5)
2Tris (trifluoromethylsulfonyl) methyllithium (LiC (SO)
2CF
3)
3) Or lithium bis (trifluoromethylsulfonyl) imide (LiN (CF)
3SO
2)
2) One or more than two of them.
7. The nonaqueous electrolytic solution of any one of claims 1 to 6, wherein the content of the lithium salt is 8 to 18 wt% based on the total mass of the nonaqueous electrolytic solution for lithium ion batteries.
8. The nonaqueous electrolytic solution of any one of claims 1 to 7, wherein the nonaqueous organic solvent is selected from carbonate and/or carboxylate, and the carbonate is selected from one or more of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate and ethyl methyl carbonate; the carboxylic ester is selected from one or more of propyl acetate, n-butyl acetate, isobutyl acetate, n-amyl acetate, isoamyl acetate, ethyl propionate, n-propyl propionate, methyl butyrate, ethyl n-butyrate or fluoro solvents of the above solvents.
9. A lithium ion battery comprising the lithium ion battery nonaqueous electrolytic solution of any one of claims 1 to 8.
10. The lithium ion battery of claim 9, wherein the lithium ion battery further comprises a positive electrode sheet containing a positive electrode active material, a negative electrode sheet containing a negative electrode active material, and a lithium ion separator;
preferably, the positive active material is selected from one or more of layered lithium composite oxide, lithium manganate and lithium cobaltate mixed ternary materials; the chemical formula of the layered lithium composite oxide is Li
1+xNi
yCo
zM
(1-y-z)Y
2Wherein x is more than or equal to-0.1 and less than or equal to 1; y is more than or equal to 0 and less than or equal to 1, z is more than or equal to 0 and less than or equal to 1, and y + z is more than or equal to 0 and less than or equal to 1; wherein M is one or more of Mg, Zn, Ga, Ba, Al, Fe, Cr, Sn, V, Mn, Sc, Ti, Nb, Mo and Zr; y is one or more of O, F, P;
preferably, the negative active material is selected from one or more of carbon materials, silicon-based materials, tin-based materials or alloy materials corresponding to the carbon materials, the silicon-based materials and the tin-based materials;
preferably, the working voltage range of the lithium ion battery is 4.2V and above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040488.XA CN110783628A (en) | 2019-10-29 | 2019-10-29 | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040488.XA CN110783628A (en) | 2019-10-29 | 2019-10-29 | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110783628A true CN110783628A (en) | 2020-02-11 |
Family
ID=69387545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911040488.XA Pending CN110783628A (en) | 2019-10-29 | 2019-10-29 | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110783628A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023044753A1 (en) * | 2021-09-24 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Electrolyte, secondary battery, battery module, battery pack, and power-consuming apparatus |
| WO2023082866A1 (en) * | 2021-11-09 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Secondary battery, method for preparing secondary battery, battery module, battery pack, and electrical apparatus |
| CN116848688A (en) * | 2023-02-20 | 2023-10-03 | 宁德时代新能源科技股份有限公司 | Nonaqueous electrolyte solution, lithium secondary battery and power utilization device |
| CN117154224A (en) * | 2023-09-15 | 2023-12-01 | 常州千沐新能源有限公司 | A deep eutectic electrolyte additive capable of solubilizing lithium salts, electrolyte and lithium battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866605A (en) * | 2005-02-28 | 2006-11-22 | 三星Sdi株式会社 | Electrolyte for a lithium battery and lithium battery comprising the same |
| CN109659614A (en) * | 2018-12-19 | 2019-04-19 | 珠海光宇电池有限公司 | A kind of lithium-ion battery electrolytes and the lithium ion battery with high energy density using the electrolyte |
-
2019
- 2019-10-29 CN CN201911040488.XA patent/CN110783628A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866605A (en) * | 2005-02-28 | 2006-11-22 | 三星Sdi株式会社 | Electrolyte for a lithium battery and lithium battery comprising the same |
| CN109659614A (en) * | 2018-12-19 | 2019-04-19 | 珠海光宇电池有限公司 | A kind of lithium-ion battery electrolytes and the lithium ion battery with high energy density using the electrolyte |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023044753A1 (en) * | 2021-09-24 | 2023-03-30 | 宁德时代新能源科技股份有限公司 | Electrolyte, secondary battery, battery module, battery pack, and power-consuming apparatus |
| WO2023082866A1 (en) * | 2021-11-09 | 2023-05-19 | 宁德时代新能源科技股份有限公司 | Secondary battery, method for preparing secondary battery, battery module, battery pack, and electrical apparatus |
| CN116848688A (en) * | 2023-02-20 | 2023-10-03 | 宁德时代新能源科技股份有限公司 | Nonaqueous electrolyte solution, lithium secondary battery and power utilization device |
| CN117154224A (en) * | 2023-09-15 | 2023-12-01 | 常州千沐新能源有限公司 | A deep eutectic electrolyte additive capable of solubilizing lithium salts, electrolyte and lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110265627B (en) | Positive electrode plate and lithium ion secondary battery | |
| CN108123172B (en) | Electrolyte and secondary lithium battery | |
| CN109390631B (en) | A kind of high nickel ternary cathode material electrolyte | |
| CN109728340B (en) | Lithium ion battery | |
| CN110797575A (en) | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same | |
| CN110808414A (en) | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same | |
| CN110649318B (en) | Electrolyte, preparation method thereof and lithium ion battery | |
| CN110808411B (en) | Electrolyte and lithium ion battery | |
| CN110783628A (en) | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same | |
| CN113410511A (en) | Lithium ion battery and electronic device | |
| CN109119599B (en) | Secondary battery and preparation method thereof | |
| CN110752406A (en) | Electrolyte and its application | |
| CN114512721A (en) | Lithium ion battery non-aqueous electrolyte and lithium ion battery | |
| CN112290090A (en) | High-nickel ternary lithium ion battery non-aqueous electrolyte and battery containing electrolyte | |
| JP2023527836A (en) | Electrolyte for lithium ion secondary battery and its use | |
| CN109524714B (en) | Lithium ion battery electrolyte and lithium ion battery | |
| CN112825371A (en) | Electrolyte for high-voltage lithium ion battery and lithium ion battery comprising same | |
| US20250055034A1 (en) | Electrolyte solution and battery including the same | |
| CN114094187A (en) | Non-aqueous electrolyte and battery comprising same | |
| CN110808413A (en) | Non-aqueous electrolyte of lithium ion battery and lithium ion battery using same | |
| CN118173892A (en) | Electrolyte and application thereof | |
| CN113851720B (en) | Non-aqueous electrolyte of lithium ion battery and application thereof | |
| CN116646598A (en) | Electrolyte and secondary battery | |
| CN113764731B (en) | Application of dioxazolone compounds in battery electrolytes | |
| CN114976247A (en) | Electrolyte and battery containing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai CosMX Battery Co.,Ltd. Address before: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200211 |