CN106025357A - Electrolyte for lithium ion battery and lithium ion battery - Google Patents
Electrolyte for lithium ion battery and lithium ion battery Download PDFInfo
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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
- H01M10/0567—Liquid materials characterised by the additives
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
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- H01M10/0569—Liquid materials characterised by the solvents
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
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Abstract
The invention relates to an electrolyte for a lithium ion battery with the working voltage of greater than 4.85V. The electrolyte comprises a lithium salt, an organic solvent and an additive, wherein the organic solvent is a mixed solvent which consists of a sulfoxide type organic solvent and other organic solvents; the sulfoxide type organic solvent accounts for 5-90% of the total mass of the organic solvent; the structural formula of the sulfoxide type organic solvent is as shown in the specification: FORMULA, wherein R1 and R2 are independently chosen from any one of alkyl, alkenyl, halogenated alkyl, halogen, sulfenyl, or cyano group with the number of carbon atoms of 1-8 as shown in the specification: FORMULA; R3, R4, R5, R6 and R7 are independently chosen from any one of alkyl, methoxyl or phenyl with the number of carbon atoms of 1-8; R8 and R9 are independently chosen from any one of alkyl with the number of carbon atoms of 1-8; and the other organic solvents are chosen from one or more of carbonic ester, carboxylic ester or ether. By adoption of the electrolyte, the cycle life of the lithium ion battery with the working voltage of greater than 4.85V can be greatly prolonged, and the safety of the lithium ion battery can be greatly improved.
Description
Technical field
The invention belongs to technical field of electrochemistry, be specifically related to electrolyte and the lithium ion battery of a kind of lithium ion battery.
Background technology
In recent years, lithium ion battery owing to having that energy density is high, have extended cycle life and the feature such as environmental friendliness, by
Step replaces the conventional batteries such as plumbic acid, NI-G, ni-mh.But, along with portable type electronic product is sent out to miniaturization, multifunction direction
Exhibition, requires more and more higher to the energy density of lithium ion battery, and the running voltage improving lithium ion battery is to improve its energy
One of density most efficient method.The most conventional carbonate-based solvent electrochemical window is narrower, is easier to decompose under high voltage, with
Time positive pole and electrolyte between reaction also can promote, ultimately result in the deterioration of battery.
In view of this, but it is necessary to provide a kind of safety electrolyte with good high voltage capability.
The electrochemical window width of sulfone, wherein first and second sulfones good stability in spinel anode material, can apply well
On 5V high voltage material (J.Electrochem.Soc.144, (1997) 205).And sulfone class and common carbonate solvent mix
Close and also can show good performance (J.Power Sources 262 (2014) 123).The sulfone class material that utilizes of report improves at present
Having of battery performance is a lot, Application No. 201010561063.6, and invention entitled one is 5V lithium ion battery for voltage
The preparation method of electrolyte, it discloses several sulfone class as mixed solvent, after adding double fluorine Lithium bis (oxalate) borate, improve
LiCoPO4The high voltage charge-discharge performance of material cell.Application No. 201010103858.2, invention entitled electrolyte
And secondary cell, it discloses sulfone class, organic acid as mixed solvent, improve discharge capacity and the initial charge/discharge effect of battery
Rate.The patent of invention of Application No. 201010185142.1 discloses organic sulfoxide class as additive, improves the high electricity of battery
Pressure circulation.But, the raising of above-mentioned battery performance still can not meet needs, and the security performance of battery is poor.
The patent of invention of Application No. 201410736551.4 disclose organic solvent be sulfone class and/or sulfoxide type, other
The mixed solvent of organic solvent, sulfoxide type is the one in dimethyl sulfoxide, tetramethyl sulfoxide, 2-biphenyl-trifluoromethyl sulfoxide
Or multiple, the organic solvent disclosed in embodiment is required to include sulfone class and sulfoxide type so that solvent species is numerous and diverse.
Summary of the invention
The technical problem to be solved is to provide a kind of can taking into account in the high voltage cycle of more than 4.85V and peace
The electrolyte of full performance.
Another technical problem to be solved by this invention is to provide a kind of lithium ion battery using above-mentioned electrolyte.
For reaching above-mentioned purpose, the technical solution used in the present invention is:
The electrolyte of a kind of lithium ion battery, including lithium salts, organic solvent and additive, described organic solvent is sulfoxide
Class organic solvent and the mixed solvent of other organic solvents, described sulfoxide type organic solvent accounts for described organic solvent gross mass
5%～90%, the structural formula of described sulfoxide type organic solvent isWherein, R1, R2 are former independently selected from carbon
Subnumber be 1～8 alkyl, thiazolinyl, haloalkyl, halogen, sulfenyl, cyano group,In arbitrary
Kind, R3、R4、R5、R6、R7Independently selected from any one in the alkyl that hydrogen, carbon number are 1～8, methoxyl group, phenyl, R8、R9
Independently selected from any one in the alkyl that carbon number is 1～8；
Other described organic solvents are one or more in carbonic ester, carboxylate, ether.
Preferably, described sulfoxide type organic solvent accounts for the 10%～50% of described organic solvent gross mass, more preferably
It is 20%～40%.
Preferably, described sulfoxide type organic solvent is for being selected from(4,4-dimethyl diphenyl sulfoxide),(4,4'-dimethoxydiphenyl sulfoxide),(2-biphenyl-trifluoromethyl
Sulfoxide),(methyl phenyl sulfoxide),(phenyl vinyl sulfoxide),(methyl first
Sulfidomethyl sulfoxide) in one or more.
Preferably, described carbonic ester includes that cyclic ester and chain ester, other described organic solvents are described ring-type
Ester and the mixed solvent of described chain ester；Described cyclic ester is selected from ethylene carbonate, fluorinated ethylene carbonate, carbonic acid third
The combination of one or more in alkene ester, gamma-butyrolacton；Described chain ester is selected from dimethyl carbonate, diethyl carbonate, carbon
Acid methyl ethyl ester, methyl formate, Ethyl formate, methyl acetate, ethyl acetate, n-propyl acetate, methyl propionate, ethyl propionate, third
The combination of one or more in acid n-propyl, methyl butyrate, ethyl n-butyrate..
According to a preferred aspect of the present invention, described cyclic ester is 1:0.25～4 with the mass ratio of described chain ester.
According to the present invention one is more highly preferred to aspect, and other described organic solvents are described ethylene carbonate and institute
The mixed solvent of the Ethyl methyl carbonate stated, wherein, described ethylene carbonate is 1:1 with the mass ratio of described Ethyl methyl carbonate
～2.
Specifically, described additive includes accounting for described electrolyte gross mass 0.1～the film for additive of 5%, accounting for institute
The electrolyte gross mass 0.1 stated～the anti-overcharge additive of 1% and account for described electrolyte gross mass 0.1～1% positive pole protect
Protect additive, described film for additive be selected from vinylene carbonate, vinyl ethylene carbonate, PS,
In propylene-1,3-propane sultone, 1,4-butyl sultone, 1,3-propene sultone, vinyl ethylene sulfite one
Plant or multiple；Described anti-overcharge additive be selected from biphenyl, cyclohexyl benzene, tert-butyl benzene, tert-amyl benzene, m-fluorotoluene, 3,4
Difluoro toluene, 4-bromine 2-fluoroanisole, p-fluorotoluene, xylol, 1,2-dimethoxy-4 '-Nitrobenzol, N-phenyl maleoyl
Imines, phenyl-pentafluoride methyl ether, 2, one or more in 5-di-t-butyl-Isosorbide-5-Nitrae-dimethoxy benzene；Described positive pole protection is added
Agent is selected from n-butylamine, carbinolamine, ethanolamine, N, N-dicyclohexylcarbodiimide, N, N dimethylamine trimethyl silane, hexamethyl
One or more in disilazane, hexaethyl disilazine or six propyl group disilazanes.
It is further preferred that the quality of described film for additive accounts for the 0.5%～2% of electrolyte gross mass.
It is further preferred that the quality of described anti-overcharge additive accounts for the 0.1%～0.5% of electrolyte gross mass.
It is further preferred that the quality of described positive pole protection additive account for electrolyte gross mass 0.1%～
0.5%.
Specifically, described lithium salts is selected from LiPF6、LiBF4、LiAsF6、LiClO4、LiBOB、LiDFOB、LiCF3SO3、
LiC4F9SO3、Li(CF3SO2)2N、Li(C2F5SO2)2One or more in N.
Preferably, the molar concentration of described lithium salts is 0.8～1.7mol/L.
It is further preferred that the molar concentration of described lithium salts is 0.9～1.1mol/L.
A kind of lithium ion battery, the electrolyte described in employing, the running voltage of described lithium ion battery 4.85V with
On.
Specifically, the positive active material of described lithium ion battery is LiNi0.5Mn1.5O4、LiNiPO4、LiCoPO4、
Li3V2(PO4)3In any one, negative material is any one in material with carbon element, metal alloy, silicon-carbon complex, silicon materials.
Owing to technique scheme is used, the present invention compared with prior art has the advantage that
The invention provides a class sulfoxide type organic solvent, it is by being greatly improved lithium ion with coordinating of other components
Battery is in the high-tension cycle life of more than 4.85V, and can suppress battery tympanites, and under full power state, acupuncture is not exploded, no
On fire, safety is high.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is elaborated:
Comparative example 1
Organic solvent is ethylene carbonate, dimethyl carbonate, Ethyl methyl carbonate (mass ratio of three is 30:20:50)；Lithium
Salt is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate, accounts for electrolyte gross mass
2%, anti-overcharge additive is biphenyl, accounts for the 0.1% of electrolyte gross mass, and positive pole protection additive is N, N-dicyclohexyl carbon two
Imines, accounts for the 0.2% of electrolyte gross mass.
Embodiment 1
Organic solvent is ethylene carbonate, 4,4-dimethyl diphenyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:20:50)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester, accounts for the 1% of electrolyte gross mass, and anti-overcharge additive is biphenyl, accounts for the 0.1% of electrolyte gross mass, and positive pole protection is added
Agent is N, N-dicyclohexylcarbodiimide, accounts for the 0.2% of electrolyte gross mass.
Embodiment 2
Organic solvent is ethylene carbonate, 4,4-dimethyl diphenyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:20:50)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester and PS, account for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, point
Not accounting for the 0.05% of electrolyte gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide, accounts for electrolyte gross mass
0.2%.
Embodiment 3
Organic solvent is ethylene carbonate, 4,4-dimethyl diphenyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester and PS, account for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, point
Not accounting for the 0.05% of electrolyte gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide, accounts for electrolyte gross mass
0.2%.
Embodiment 4
Organic solvent is ethylene carbonate, 4,4-dimethyl diphenyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester and PS, account for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, point
Not accounting for the 0.05% of electrolyte gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide and hexamethyl two silicon nitrogen
Alkane, accounts for the 0.1% of electrolyte gross mass respectively.
Embodiment 5
Organic solvent is ethylene carbonate, 4,4'-dimethoxydiphenyl sulfoxideCarbonic acid
Methyl ethyl ester (mass ratio of three is 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive
For vinylene carbonate and PS, accounting for the 0.5% of electrolyte gross mass respectively, anti-overcharge additive is cyclohexyl
Benzene and biphenyl, account for the 0.05% of electrolyte gross mass respectively, and positive pole protection additive is N, N-dicyclohexylcarbodiimide and six
Methyl disilazane, accounts for the 0.1% of electrolyte gross mass respectively.
Embodiment 6
Organic solvent is ethylene carbonate, 2-biphenyl-trifluoromethyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:20:50)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester, accounts for the 1% of electrolyte gross mass, and anti-overcharge additive is biphenyl, accounts for the 0.1% of electrolyte gross mass, and positive pole protection is added
Agent is N, N-dicyclohexylcarbodiimide, accounts for the 0.2% of electrolyte gross mass.
Embodiment 7
Organic solvent is ethylene carbonate, 2-biphenyl-trifluoromethyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:20:50)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester and PS, account for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, point
Not accounting for the 0.05% of electrolyte gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide, accounts for electrolyte gross mass
0.2%.
Embodiment 8
Organic solvent is ethylene carbonate, 2-biphenyl-trifluoromethyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester and PS, account for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, point
Not accounting for the 0.05% of electrolyte gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide, accounts for electrolyte gross mass
0.2%.
Embodiment 9
Organic solvent is ethylene carbonate, 2-biphenyl-trifluoromethyl sulfoxideEthyl methyl carbonate (three
Mass ratio be 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate
Ester and PS, account for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, point
Not accounting for the 0.05% of electrolyte gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide and hexamethyl two silicon nitrogen
Alkane, accounts for the 0.1% of electrolyte gross mass respectively.
Embodiment 10
Organic solvent is ethylene carbonate, methyl phenyl sulfoxide(mass ratio of three is Ethyl methyl carbonate
30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate and 1,3-third
Sultones, accounts for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, accounts for electrolyte respectively
The 0.05% of gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide and hexamethyldisiloxane, accounts for electricity respectively
Solve the 0.1% of liquid gross mass.
Embodiment 11
Organic solvent is ethylene carbonate, phenyl vinyl sulfoxideEthyl methyl carbonate (the quality of three
Ratio is 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate and 1,
3-N-morpholinopropanesulfonic acid lactone, accounts for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, accounts for electricity respectively
Solving the 0.05% of liquid gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide and hexamethyldisiloxane, respectively
Account for the 0.1% of electrolyte gross mass.
Embodiment 12
Organic solvent is ethylene carbonate, FAMSOEthyl methyl carbonate (the quality of three
Ratio is 30:40:30)；Lithium salts is LiPF6, and the concentration of lithium salts is 1mol/L, film for additive is vinylene carbonate and 1,
3-N-morpholinopropanesulfonic acid lactone, accounts for the 0.5% of electrolyte gross mass respectively, and anti-overcharge additive is cyclohexyl benzene and biphenyl, accounts for electricity respectively
Solving the 0.05% of liquid gross mass, positive pole protection additive is N, N-dicyclohexylcarbodiimide and hexamethyldisiloxane, respectively
Account for the 0.1% of electrolyte gross mass.
Experimental result
The electrolyte of comparative example and embodiment is injected the LiNi with batch0.5Mn1.5O4And Li3V2PO4For positive-active material
Material, graphitic carbon material be negative pole normal capacity 1Ah aluminum-shell battery in, test battery under room temperature, 60 DEG C of hot environments
High voltage cycle and security performance test.
LiNi prepared by comparative example and embodiment electrolyte0.5Mn1.5O4Battery follows in the circulation of 4.85V room temperature and 60 DEG C of high temperature
The Data Comparison of ring such as table 1:
Table 1
LiNi prepared by comparative example and embodiment electrolyte0.5Mn1.5O4Battery at 4.9V room temperature loop-around data to such as table
2:
Table 2
| Room temperature 100Z conservation rate % | |
| Comparative example 1 | 35.87 |
| Embodiment 1 | 38.91 |
| Embodiment 2 | 40.22 |
| Embodiment 3 | 43.18 |
| Embodiment 4 | 46.39 |
| Embodiment 5 | 45.89 |
| Embodiment 6 | 45.94 |
| Embodiment 7 | 46.51 |
| Embodiment 8 | 46.35 |
| Embodiment 9 | 49.46 |
| Embodiment 10 | 48.32 |
| Embodiment 11 | 45.43 |
| Embodiment 12 | 43.75 |
Li prepared by comparative example and embodiment electrolyte3V2PO4Battery is in the circulation of 4.85V room temperature and 60 DEG C of high temperature circulation
Data Comparison such as table 3:
Table 3
Li prepared by comparative example and embodiment electrolyte3V2PO4The Data Comparison such as table 4 that battery circulates at 4.9V room temperature:
Table 4
| Room temperature 100Z conservation rate | |
| Comparative example 1 | 36.56 |
| Embodiment 1 | 39.61 |
| Embodiment 2 | 42.33 |
| Embodiment 3 | 45.95 |
| Embodiment 4 | 48.67 |
| Embodiment 5 | 48.04 |
| Embodiment 6 | 48.55 |
| Embodiment 7 | 49.36 |
| Embodiment 8 | 49.21 |
| Embodiment 9 | 55.18 |
| Embodiment 10 | 50.88 |
| Embodiment 11 | 51.33 |
| Embodiment 12 | 47.09 |
From above table, embodiments of the invention are either in room temperature circulation or high temperature circulation better than contrast
Example.
LiNi prepared by comparative example and embodiment electrolyte0.5Mn1.5O4Cell safety test Data Comparison such as table 5:
Table 5
| 4.85V acupuncture | 4.9V acupuncture | |
| Comparative example 1 | Smolder blast | Smolder blast |
| Embodiment 1 | Smolder | Smolder blast |
| Embodiment 2 | Smolder | Smolder |
| Embodiment 3 | Smolder | Smolder |
| Embodiment 4 | OK | Smolder |
| Embodiment 5 | OK | Smolder |
| Embodiment 6 | OK | Smolder |
| Embodiment 7 | OK | OK |
| Embodiment 8 | OK | OK |
| Embodiment 9 | OK | OK |
| Embodiment 10 | OK | OK |
| Embodiment 11 | OK | OK |
| Embodiment 12 | OK | Smolder |
Li prepared by comparative example and embodiment electrolyte3V2PO4Cell safety test Data Comparison such as table 6:
Table 6
From upper form, battery security prepared by embodiment is substantially better than battery prepared by comparative example.
Above-described embodiment, only for technology design and the feature of the explanation present invention, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implements according to this, can not limit the scope of the invention with this, all according to the present invention
The equivalence that spirit is made changes or modifies, and all should contain within protection scope of the present invention.
Claims (10)
1. an electrolyte for lithium ion battery, including lithium salts, organic solvent and additive, it is characterised in that: described is organic
Solvent is the mixed solvent of sulfoxide type organic solvent and other organic solvents, and described sulfoxide type organic solvent accounts for described organic molten
The 5%～90% of agent gross mass, the structural formula of described sulfoxide type organic solvent isWherein, R1, R2 are independently
Selected from the alkyl that carbon number is 1～8, thiazolinyl, haloalkyl, halogen, sulfenyl, cyano group,
In any one, R3、R4、R5、R6、R7Arbitrary independently selected from the alkyl that hydrogen, carbon number are 1～8, methoxyl group, phenyl
Kind, R8、R9Independently selected from any one in the alkyl that carbon number is 1～8；
Other described organic solvents are one or more in carbonic ester, carboxylate, ether.
The electrolyte of lithium ion battery the most according to claim 1, it is characterised in that: described sulfoxide type organic solvent accounts for institute
The 10%～50% of the organic solvent gross mass stated.
The electrolyte of lithium ion battery the most according to claim 1, it is characterised in that: described sulfoxide type organic solvent is
It is selected from In one or more.
The electrolyte of lithium ion battery the most according to claim 1, it is characterised in that: described carbonic ester includes cyclic ester
With chain ester, other described organic solvents are described cyclic ester and the mixed solvent of described chain ester；Described is ring-type
Ester is the combination of one or more in ethylene carbonate, fluorinated ethylene carbonate, Allyl carbonate, gamma-butyrolacton；Institute
The chain ester stated for selected from dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, methyl formate, Ethyl formate, methyl acetate,
In in ethyl acetate, n-propyl acetate, methyl propionate, ethyl propionate, n propyl propionate, methyl butyrate, ethyl n-butyrate. one
Kind or multiple combination.
The electrolyte of lithium ion battery the most according to claim 4, it is characterised in that: described cyclic ester and described chain ester
Mass ratio be 1:0.25～4.
The electrolyte of lithium ion battery the most according to claim 5, it is characterised in that: other described organic solvents are institute
The ethylene carbonate stated and the mixed solvent of described Ethyl methyl carbonate, wherein, described ethylene carbonate and described carbonic acid
The mass ratio of methyl ethyl ester is 1:1～2.
The electrolyte of lithium ion battery the most according to claim 1, it is characterised in that: described additive includes accounting for described
Electrolyte gross mass 0.1～the film for additive of 5%, account for described electrolyte gross mass 0.1～the anti-overcharge additive of 1%
With account for described electrolyte gross mass 0.1～the positive pole protection additive of 1%, described film for additive is selected from carbonic acid Asia second
Alkene ester, vinyl ethylene carbonate, 1,3-propane sultone, propylene-1,3-propane sultone, 1,4-butyl sultone, 1,3-
One or more in propene sultone, vinyl ethylene sulfite；Described anti-overcharge additive is selected from biphenyl, ring
Hexyl benzene, tert-butyl benzene, tert-amyl benzene, m-fluorotoluene, 3,4 difluoro toluenes, 4-bromine 2-fluoroanisole, p-fluorotoluene, to diformazan
Benzene, 1,2-dimethoxy-4 '-Nitrobenzol, N-phenylmaleimide, phenyl-pentafluoride methyl ether, 2,5-di-t-butyl-Isosorbide-5-Nitrae-dimethoxy
One or more in base benzene；Described positive pole protection additive is selected from n-butylamine, carbinolamine, ethanolamine, N, N-bis-hexamethylene
Base carbodiimide, N, N dimethylamine trimethyl silane, hexamethyldisiloxane, hexaethyl disilazine or six propyl group disilazanes
In one or more.
The electrolyte of lithium ion battery the most according to claim 1, it is characterised in that: described lithium salts is selected from LiPF6、
LiBF4、LiAsF6、LiClO4、LiBOB、LiDFOB、LiCF3SO3、LiC4F9SO3、Li(CF3SO2)2N、Li(C2F5SO2)2In N
One or more.
9. a lithium ion battery, it is characterised in that: use the electrolyte according to any one of claim 1 to 8, described lithium
The running voltage of ion battery is at more than 4.85V.
Lithium ion battery the most according to claim 9, it is characterised in that: the positive electrode active material of described lithium ion battery
Matter is LiNi0.5Mn1.5O4、LiNiPO4、LiCoPO4、Li3V2(PO4)3In any one, negative material be material with carbon element, metal close
Any one in gold, silicon-carbon complex, silicon materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610465544.4A CN106025357A (en) | 2016-06-24 | 2016-06-24 | Electrolyte for lithium ion battery and lithium ion battery |
Applications Claiming Priority (1)
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106450462A (en) * | 2016-12-27 | 2017-02-22 | 石家庄圣泰化工有限公司 | Electrolyte of high-voltage wide-temperature-range lithium-ion battery |
| CN106785039A (en) * | 2016-12-27 | 2017-05-31 | 石家庄圣泰化工有限公司 | A kind of amide containing electrolyte of lithium ion battery |
| CN108365264A (en) * | 2018-01-17 | 2018-08-03 | 湖南博信新能源科技有限公司 | A kind of lithium battery tertiary electrolyte |
| CN108417891A (en) * | 2017-02-10 | 2018-08-17 | 中信国安盟固利动力科技有限公司 | A kind of anti-overcharge lithium-ion electrolyte and lithium ion battery prepared therefrom |
| CN111244551A (en) * | 2020-03-16 | 2020-06-05 | 电子科技大学 | Electrolyte additive and application thereof in lithium ion battery |
| CN111384440A (en) * | 2018-12-27 | 2020-07-07 | 浙江省化工研究院有限公司 | Lithium ion battery electrolyte additive, electrolyte containing additive and lithium ion battery |
| CN112366352A (en) * | 2020-11-09 | 2021-02-12 | 四川虹微技术有限公司 | Lithium ion battery electrolyte additive, electrolyte and application thereof |
| CN116960467A (en) * | 2023-09-15 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electricity utilization device |
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| CN102035022A (en) * | 2010-11-26 | 2011-04-27 | 南开大学 | Method for preparing electrolyte for 5V lithium ion battery |
| CN104409772A (en) * | 2014-12-04 | 2015-03-11 | 张家港市国泰华荣化工新材料有限公司 | Lithium-ion battery electrolyte and lithium-ion battery |
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| CN102035022A (en) * | 2010-11-26 | 2011-04-27 | 南开大学 | Method for preparing electrolyte for 5V lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106450462A (en) * | 2016-12-27 | 2017-02-22 | 石家庄圣泰化工有限公司 | Electrolyte of high-voltage wide-temperature-range lithium-ion battery |
| CN106785039A (en) * | 2016-12-27 | 2017-05-31 | 石家庄圣泰化工有限公司 | A kind of amide containing electrolyte of lithium ion battery |
| CN108417891A (en) * | 2017-02-10 | 2018-08-17 | 中信国安盟固利动力科技有限公司 | A kind of anti-overcharge lithium-ion electrolyte and lithium ion battery prepared therefrom |
| CN108365264A (en) * | 2018-01-17 | 2018-08-03 | 湖南博信新能源科技有限公司 | A kind of lithium battery tertiary electrolyte |
| CN111384440A (en) * | 2018-12-27 | 2020-07-07 | 浙江省化工研究院有限公司 | Lithium ion battery electrolyte additive, electrolyte containing additive and lithium ion battery |
| CN111384440B (en) * | 2018-12-27 | 2023-09-12 | 浙江省化工研究院有限公司 | Electrolyte additive for lithium ion battery, electrolyte containing additive and lithium ion battery |
| CN111244551A (en) * | 2020-03-16 | 2020-06-05 | 电子科技大学 | Electrolyte additive and application thereof in lithium ion battery |
| CN111244551B (en) * | 2020-03-16 | 2022-05-03 | 电子科技大学 | Electrolyte additive and application thereof in lithium ion battery |
| CN112366352A (en) * | 2020-11-09 | 2021-02-12 | 四川虹微技术有限公司 | Lithium ion battery electrolyte additive, electrolyte and application thereof |
| CN116960467A (en) * | 2023-09-15 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electricity utilization device |
| CN116960467B (en) * | 2023-09-15 | 2024-02-20 | 宁德时代新能源科技股份有限公司 | Battery cell, battery and electricity utilization device |
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Application publication date: 20161012 |