CN106252725A - A kind of Overcharge prevention electrolyte based on ternary lithium ion battery and lithium ion battery - Google Patents
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery and lithium ion battery Download PDFInfo
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- CN106252725A CN106252725A CN201610786362.7A CN201610786362A CN106252725A CN 106252725 A CN106252725 A CN 106252725A CN 201610786362 A CN201610786362 A CN 201610786362A CN 106252725 A CN106252725 A CN 106252725A
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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
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- 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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Abstract
The invention provides a kind of Overcharge prevention electrolyte based on ternary lithium ion battery and lithium ion battery, it is characterised in that: described electrolyte includes lithium salts, organic solvent, overcharging additive, additive salt and functional additive；Described overcharging additive includes that one or more aromatic derivant A and/or B, derivant A, the quality of B respectively account for 0.01% the 5% of electrolyte quality.The Overcharge prevention electrolyte that the present invention provides, nickel-cobalt-manganese ternary material can be obviously improved, the especially over-charging of the battery in the case of nickel content improves, and on the premise of can improving and overcharging, decrease the usage amount (< 5%) of additive as far as possible, having not significant impact charge/discharge capacity, battery DCR is the most unchanged, and cycle life the most substantially reduces.
Description
Technical field
The invention belongs to technical field of lithium ion, especially relate to a kind of lithium based on nickel-cobalt-manganternary ternary anode material
The Overcharge prevention electrolyte of ion battery and lithium battery.
Background technology
Along with developing rapidly of China's ev industry in recent years, the core component of electric automobile-lithium ion power electricity
Pond is also into Rapid development stage.Lithium ion battery is considered owing to having the clear superiority of high-energy-density and high-specific-power
Be most potential following electrokinetic cell system, but it there is also certain safety issue, be the most often related to lithium from
The report that sub-battery explosion is on fire, governs its use on vehicle electric system to a great extent.In many factors,
Overcharge is one of common factors causing lithium ion battery security problem.For many years, the mistake of lithium ion battery how is improved
Always one problem being concerned by people of charging performance, and along with the energy density of batteries of electric automobile improves constantly, nickel ternary
Cobalt manganese material is widely applied, and in order to improve energy density, the increase of nickel content in material, make the heat stability of material
Reducing, the security performance of battery is deteriorated, and makes the harsher by condition of overcharge.Traditional method improving overcharge be
Outside batteries installs gas pressure detection unit or relief valve, or is improved by the TCO protection circuit of external dedicated, but these
Method adds cost and device complexity, is also unsuitable for batteries of electric automobile field, and is realized by electrolysis additive
The additives for overcharge protection of battery, owing to greatly simplify battery manufacturing process, on the premise of cost does not increases, improves effect
Fruit is substantially widely applied.
In the developing history of overcharging additive, relatively early studied and apply is a class oxidoreduction shuttle type chemical combination
Thing, this is the compound that a class has high reversible oxidation-reduction potential, and reduced form R is joined in electrolyte, and R is at positive pole
On be oxidized to compound O, then O moves to negative pole and is reduced to original form R.Battery is after overcharge, and oxidation is also
Former electricity, to shuttling back and forth between a positive electrode and a negative electrode, absorbs unnecessary electric charge, defines internal anti-overcharge mechanism, substantially improves battery
Security performance.But owing to oxidizing potential is relatively low, to such an extent as to partial oxidation and reduction, shadow can occur in normal charge and discharge process
The capacity having rung battery plays, thus limits its application.This kind of additive typically has ferrocene etc..Another kind of conventional mistake
Filling additive is a class oxypolymer, typically has biphenyl, cyclohexyl benzene etc..The oxidizing potential of this compounds is of a relatively high
(> 4.5V), it is not involved in reaction when normal discharge and recharge, when battery overcharges, when current potential has reached the oxidation electricity of additive
Position, understands in positive pole generation oxidation polymerization, and then in positive pole film forming.The impedance of positive pole film forming is relatively big, so that the whole internal resistance of cell
Increasing, voltage raises rapidly and reaches to overcharge protection voltage and stop.But this kind of additive is it is generally required to add more amount and just can rise
Effect (general > 5%), and battery performance can be had a negative impact.
Along with the raising day by day of current lithium-ion-power cell energy density, high-nickel material becomes requisite choosing
Selecting, but it also exists the shortcomings such as poor heat stability, especially under the conditions of overcharging, anodic potentials raises rapidly, and battery is a large amount of
, easily there is combustion explosion in heat release.The method that traditional improvement overcharges such as installs extra protection device can increase battery cost
And complexity, it is not appropriate for electric automobile power battery, using the electrolyte containing overcharging additive is reasonable selection.It
Over-charging can be effectively improved on the premise of not increasing battery manufacture cost.But traditional electrolyte prescription uses
Additive capacity is more and protected effect general, and battery performance can be produced bigger adverse effect, as reduced battery
Capacity and cycle life etc..
Based on this, the invention provides a class electrolyte, nickel-cobalt-manganese ternary material can be obviously improved, especially contain at nickel
Amount improve in the case of the over-charging of battery, and on the premise of can improving and overcharging, decrease making of additive as far as possible
Consumption (< 5%), charge/discharge capacity is had not significant impact, battery DCR is the most unchanged, and cycle life the most substantially reduces.
Summary of the invention
For problem above, object of the present invention is to provide a class electrolyte prescription, different proportion nickel cobalt can be improved
The over-charging of the lithium ion battery of manganese ternary material, and additive amount is low, improve overcharge on the premise of electricity to battery
Performance has no adverse effect substantially.
The technical scheme is that and be achieved in that:
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery, including lithium salts, organic solvent, overcharging additive, salt
Class additive and functional additive；Described overcharging additive includes one or more aromatic derivant A and/or B, spreads out
The quality of biological A, B respectively accounts for the 0.01%-5% of electrolyte quality, and its typical structural formula is:
Wherein, wherein C, D, E, the F in derivant A and O, P, Q, X, Y, Z in derivant B independently selected from phenyl, ring
Any one in hexyl, hydrogen atom, methyl, the tert-butyl group, other band branched alkyl groups, heteroatom functional group, wherein hetero atom
For fluorine, chlorine and bromine.
Further, C, D, E, F in described derivant A independently be in phenyl, cyclohexyl, hydrogen atom or fluorine atom
Any one；O, P, Q, X, Y, Z in described derivant B independently be any one in hydrogen atom or fluorine atom.
Further, described derivant A be biphenyl, fluorobenzene, to difluorobenzene or cyclohexyl benzene；Described derivant B is 2-fluorine
Biphenyl, 3-fluorine biphenyl, 4-fluorine biphenyl or 4,4 '-DfBP；The structural formula of derivant A is:
A: for
Further, described derivant B is 4,4 '-DfBP, and its structural formula is:
B is
Further, described lithium salts is LiPF6、LiClO4、LiAsF6、LiBF4、LiCF3SO3、LiN(CF3SO2)2In one
Kind or two or more mixture, its concentration is 0.01-2mol/L；Preferably, its concentration is 0.8-1.2mol/L.
Further, during described additive salt is LiBOB, LiFOB, LTFOP, LiBFMB one or more
Mixture, described additive salt accounts for electrolyte quality than for 0.01%-1%；Preferably, described additive salt accounts for electrolyte
Mass ratio is 0.5%-1%.
Further, described organic solvent be by the one in cyclic carbonates, linear carbonate class, other esters or
The mixed solvent of two or more compositions；Described cyclic carbonates is ethylene carbonate, Allyl carbonate, gamma butyrolactone, carbonic acid
One or more in butylene；Described linear carbonate class be dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate,
One or more in dipropyl carbonate；Other esters described are the one in ethyl acetate, methyl butyrate, ethyl n-butyrate.
Or it is two or more.
Further, described organic solvent is the mixture of ethylene carbonate, diethyl carbonate and Ethyl methyl carbonate, described
The volume ratio of ethylene carbonate, diethyl carbonate and Ethyl methyl carbonate is (0.8-1.2): (0.8-1.2): (0.8-1.2).
Further, described functional additive be vinylene carbonate, vinylethylene carbonate, fluorinated ethylene carbonate,
One in ethylene sulfite, propylene sulfite, butylene sulfite, acetonitrile, succinonitrile, acrylonitrile, vinyl acetate
Or two or more mixture, described functional additive accounts for the 0.5%-10% of electrolyte gross mass；Preferably, described function adds
Add agent and account for the 0.5%-5% of electrolyte gross mass.
Present invention also offers a kind of lithium ion battery, its electrolyte uses the one described in any one of claim 1-9
Overcharge prevention electrolyte based on ternary lithium ion battery.
The beneficial effects of the present invention is:
By to the kind of additive salt and overcharging additive and the optimization of ratio, enabling the electrolyte of the present invention to lead to
Cross the overcharge test of different nickel cobalt manganese ratio tertiary cathode material battery.Wherein, additive salt can become at anode portion
Film, improves the heat stability of positive electrode under high voltage, and overcharging additive is when overcharging, can be in positive electrode surface oxidation polymerization
Film forming, makes anodic potentials raise: on the one hand, and oxidative polymerization can produce hydrogen, makes the interface separation between both positive and negative polarity and barrier film
Increasing, lithium ion resistance when transmission increases, and the internal resistance of cell increases；On the other hand, the compound of oxidation polymerization is attached to positive pole
Surface, makes the impedance of positive pole increase.Under conditions of constant-current charge, anodic potentials can rise rapidly, can rise in the short time
Final voltage, owing to the time is short, heat production is less, and battery can be by overcharging test.In this process, additive salt and overcharging
Additive serves multiple protective effect to positive pole.This collaborative protective effect can be greatly reduced the use of additive
Amount, avoids the additive adverse effect to battery performance as far as possible.
Additionally, the present invention carried out first the tertiary cathode material battery for different nickel cobalt manganese ratios over-charging and
The kind of overcharging additive used and the work of quantifier elimination initiative, and the mistake to follow-up other materials (nickelic positive electrode)
The improvement filling performance has certain directive significance.
Accompanying drawing explanation
The accompanying drawing of the part constituting the present invention is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.
Fig. 1 is the time that overcharges, voltage and the temperature curve of the lithium ion battery that comparative example makes；
Fig. 2 is the time that overcharges, voltage and the temperature curve of the lithium ion battery that embodiment 1 makes；
Fig. 3 is the time that overcharges, voltage and the temperature curve of the lithium ion battery that embodiment 2 makes；
Fig. 4 is the time that overcharges, voltage and the temperature curve of the lithium ion battery that embodiment 3 makes；
Fig. 5 is the cyclic curve of the lithium ion battery of comparative example and the making of embodiment 1-3.
Charging: 0.5C, 4.2V, 0.05C cutoff
Have a rest: 5min
Electric discharge: 0.5C, 2.75V
Have a rest: 5min
Detailed description of the invention
Unless otherwise indicated, term used herein is respectively provided with the implication that those skilled in the art's routine understands.
The present invention is described in detail below in conjunction with embodiment and accompanying drawing.
Comparative example:
(1) preparation electrolyte: (H in glove box2O ＜ 10ppm, Ar ＞ 99.99%) preparation lithium-ion battery electrolytes,
By lithium salts lithium hexafluoro phosphate (LiPF6) it is dissolved in ethylene carbonate (EC), diethyl carbonate (DEC) and Ethyl methyl carbonate (EMC)
Volume ratio is in the mixed solution of 1:1:1, lithium hexafluoro phosphate (LiPF6) concentration is 1.1mol/L, functional additive is that carbonic acid is sub-
Vinyl acetate (VC) 2% (wt%), propylene sulfite (PS) 2% (wt%).
(2) battery is prepared: prepare the most extremely nickel-cobalt-manganese ternary material LiNi with this electrolyte0.33Co0.33Mn0.33O2, negative pole
For Delanium, barrier film is the lithium ion battery of polyethylene (PE) barrier film.First by positive mix, negative pole powder, conductive agent, glue
Knot agent is separately added in organic solvent, is configured to anode sizing agent and cathode size after high-speed stirred, by anode sizing agent with negative
Pole slurry is uniformly coated on aluminium foil and copper foil surface respectively via coating machine, through overbaking, rolls prepared anode pole piece and bears
Pole pole piece.The pole piece mode that warp is replaced by positive and negative electrode after cutting stacks or is wound into battery core, and wherein positive pole and negative pole are with barrier film
Separating, lug is by being welded and fixed；Core bag is put into cell aluminum-plastic membrane housing, battery container leaves electrolyte inlet；
Battery core removes moisture removal at 80 DEG C of baking 12h.The mode charging voltage upper limit of staged discharge and recharge is used to control after battery seal
4.2V, charging current is 0.5C.
(3) battery testing: the battery prepared is carried out 1C, 6.5V and overcharges test (1C charges under 6.5V or full electricity state
1C charges 1hr), result batteries caught fire, overcharge test does not passes through.
Embodiment 1:
(1) preparation electrolyte: (H in glove box2O ＜ 10ppm, Ar ＞ 99.99%) preparation lithium-ion battery electrolytes,
By lithium salts lithium hexafluoro phosphate (LiPF6) it is dissolved in ethylene carbonate (EC), diethyl carbonate (DEC) and Ethyl methyl carbonate (EMC)
Volume ratio is in the mixed solution of 1:1:1, lithium hexafluoro phosphate (LiPF6) concentration is 1.1mol/L, functional additive is that carbonic acid is sub-
Vinyl acetate (VC) 2% (wt%), propylene sulfite (PS) 2% (wt%).The overcharging additive added is cyclohexyl benzene (CHB)
1% (wt%), biphenyl (BP) 1% (wt%), to difluorobenzene 1% (wt%), additive salt is dioxalic acid Lithium biborate (LiBOB)
1% (wt%).The quality of overcharging additive accounts for the 3% of electrolyte gross mass.
(2) battery is prepared: prepare the most extremely nickel-cobalt-manganese ternary material LiNi with this electrolyte0.33Co0.33Mn0.33O2, negative pole
For Delanium, barrier film is the lithium ion battery of polyethylene (PE) barrier film.Battery core manufacture method and preparation in comparative example step (2)
Method is identical.
(3) battery testing: this battery is carried out 1C, 6.5V and overcharges test (1C charges to 1C charging under 6.5V or full electricity state
1hr), result battery do not smolder, missing of ignition, do not explode.Overcharge test passes through.
Embodiment 2:
(1) preparation electrolyte: (H in glove box2O ＜ 10ppm, Ar ＞ 99.99%) preparation lithium-ion battery electrolytes,
By lithium salts lithium hexafluoro phosphate (LiPF6) it is dissolved in ethylene carbonate (EC), diethyl carbonate (DEC) and Ethyl methyl carbonate (EMC) body
Long-pending than in the mixed solution of 1:1:1, lithium hexafluoro phosphate (LiPF6) concentration is 1.1mol/L, functional additive is carbonic acid Asia second
Alkene ester (VC) 2% (wt%), propylene sulfite (PS) 2% (wt%).The overcharging additive added is cyclohexyl benzene (CHB)
2% (wt%), biphenyl (BP) 1% (wt%), fluorobenzene 1% (wt%), additive salt is dioxalic acid Lithium biborate (LiBOB)
0.5% (wt%).The quality of overcharging additive accounts for the 4% of electrolyte gross mass.
(2) battery is prepared: prepare the most extremely nickel-cobalt-manganese ternary material LiNi with this electrolyte0.5Co0.2Mn0.3O2, negative pole is
Delanium, barrier film is the lithium ion battery of polyethylene (PE) barrier film.Battery core manufacture method and preparation side in comparative example step (2)
Method is identical.
(3) battery testing: this battery is carried out 1C, 6.5V and overcharges test (1C charges to 1C charging under 6.5V or full electricity state
1hr), result battery do not smolder, missing of ignition, do not explode.Overcharge test passes through.
Embodiment 3:
(1) preparation electrolyte: (H in glove box2O ＜ 10ppm, Ar ＞ 99.99%) preparation lithium-ion battery electrolytes,
By lithium salts lithium hexafluoro phosphate (LiPF6) it is dissolved in ethylene carbonate (EC), diethyl carbonate (DEC) and Ethyl methyl carbonate (EMC) body
Long-pending than in the mixed solution of 1:1:1, lithium hexafluoro phosphate (LiPF6) concentration is 1.1mol/L, functional additive is carbonic acid Asia second
Alkene ester (VC) 2% (wt%), propylene sulfite (PS) 2% (wt%).The overcharging additive added is cyclohexyl benzene (CHB)
1.5% (wt%), biphenyl (BP) 1% (wt%), 4,4 '-DfBP 2% (wt%), additive salt is dioxalic acid Lithium biborate
(LiBOB) 0.5% (wt%).The quality of overcharging additive accounts for the 4.5% of electrolyte gross mass.(2) battery is prepared: be electrolysed with this
Liquid preparation the most extremely nickel-cobalt-manganese ternary material LiNi0.6Co0.2Mn0.2O2, negative pole is Delanium, barrier film be polyethylene (PE) every
The lithium ion battery of film.Battery core manufacture method is identical with preparation method in comparative example step (2).
(3) battery testing: this battery is carried out 1C, 6.5V and overcharges test (1C charges to 1C charging under 6.5V or full electricity state
1hr), result battery do not smolder, missing of ignition, do not explode.Overcharge test passes through.
By the lithium ion battery of the different nickel cobalt manganese proportions of preparation in above comparative example and embodiment 1-3 is existed
1C, 6.5V carry out overcharging voltage and temperature curve that in test, comparative example and embodiment 1-3, the lithium ion battery of preparation overcharges to be seen
Fig. 1, Fig. 2, Fig. 3 and Fig. 4.
Being found out by data and figure, the present invention is by the kind of overcharging additive in electrolyte and the adjustment of amount, permissible
The ternary material electrokinetic cell making different proportion scope nickel cobalt manganese overcharges test by 1C, 6.5V.Ensureing that overcharging test passes through
On the premise of, make the amount of additive and its adverse effect of battery electrical property is preferably minimized.
What table 1 different proportion nickel-cobalt-manganese ternary material cell used overcharges electrolyte prescription and DCR value
It is an advantage of the current invention that, by optimizing allotment additive salt and the kind of overcharging additive and consumption, using
On the premise of additive capacity is minimum, make the battery with the tertiary cathode material of different nickel cobalt manganese ratio can pass through 1C, 6.5V
Overcharging experiment, battery is missing of ignition after overcharging, and does not explodes, and the electrical property of battery such as capacity, cycle life the most substantially reduces,
DCR (DC internal resistance) does not significantly increase.Wherein, additive salt can be in positive pole film forming, film forming Heat stability is good.Overcharge interpolation
Agent is the aromatic derivant of little molecule, and when overcharging, it can be polymerized while producing gas in positive pole oxidation polymerization
Thing, in positive pole film forming, increases internal resistance, and voltage rises rapidly and reaches overcharged voltage and stop.
Due to additive salt and the multiple synergistic protective effect of overcharging additive, can make while improving over-charging
The consumption of additive reduces, and meanwhile, the present invention is first for the overcharging of tertiary cathode material battery of different nickel cobalt manganese ratios
Performance is studied, the ternary material of different Ni contents, and heat stability is different, the current potential of thermal failure and time when overcharging
Different.Therefore the overcharging additive of variety classes and amount can be used targetedly.This work is to follow-up other materials (nickelic positive pole
Material) the improvement of over-charging also there is certain theory directive significance.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. an Overcharge prevention electrolyte based on ternary lithium ion battery, it is characterised in that: described electrolyte includes lithium salts, organic
Solvent, overcharging additive, additive salt and functional additive；Described overcharging additive includes one or more fragrance
Race's derivant A and/or B, derivant A, the quality of B respectively account for the 0.01%-5% of electrolyte quality, and its typical structural formula is:
Wherein, C, D, E, F in derivant A and O, P, Q, X, Y, the Z in derivant B is former independently selected from phenyl, cyclohexyl, hydrogen
Son, methyl, the tert-butyl group, other band branched alkyl groups, heteroatom functional group in any one, wherein hetero atom be fluorine, chlorine and
Bromine.
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 1, it is characterised in that: described
C, D, E, F in derivant A independently be any one in phenyl, cyclohexyl, hydrogen atom or fluorine atom；In described derivant B
O, P, Q, X, Y, Z independently be any one in hydrogen atom or fluorine atom.
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 1, it is characterised in that: described
Derivant A be biphenyl, fluorobenzene, to difluorobenzene or cyclohexyl benzene；Described derivant B is 2-fluorine biphenyl, 3-fluorine biphenyl, 4-fluorine biphenyl
Or 4,4 '-DfBP.
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 3, it is characterised in that: described
Derivant B is 4,4 '-DfBP.
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 1, it is characterised in that: described
Lithium salts is LiPF6、LiClO4、LiAsF6、LiBF4、LiCF3SO3、LiN(CF3SO2)2In one or more mixture,
Its concentration is 0.01-2mol/L；Preferably, its concentration is 0.8-1.2mol/L.
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 1, it is characterised in that: described
Additive salt is one or more the mixture in LiBOB, LiFOB, LTFOP, LiBFMB, described additive salt
Account for electrolyte quality than for 0.01%-1%；Preferably, described additive salt accounts for electrolyte quality than for 0.5%-1%.
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 1, it is characterised in that: described
Organic solvent is molten by one or more mixing formed in cyclic carbonates, linear carbonate class, other esters
Agent；Described cyclic carbonates is one or both in ethylene carbonate, Allyl carbonate, gamma butyrolactone, butylene carbonate
Above；Described linear carbonate class be the one in dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, dipropyl carbonate or
Two or more；Other esters described are one or more in ethyl acetate, methyl butyrate, ethyl n-butyrate..
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 7, it is characterised in that: described
Organic solvent is the mixture of ethylene carbonate, diethyl carbonate and Ethyl methyl carbonate, described ethylene carbonate, diethyl carbonate
It is (0.8-1.2) with the volume ratio of Ethyl methyl carbonate: (0.8-1.2): (0.8-1.2).
A kind of Overcharge prevention electrolyte based on ternary lithium ion battery the most according to claim 1, it is characterised in that: described
Functional additive is vinylene carbonate, vinylethylene carbonate, fluorinated ethylene carbonate, ethylene sulfite, sulfurous acid third
One or more mixture in alkene ester, butylene sulfite, acetonitrile, succinonitrile, acrylonitrile, vinyl acetate, institute
State functional additive and account for the 0.5%-10% of electrolyte gross mass；Preferably, described functional additive accounts for electrolyte gross mass
0.5%-5%.
10. a lithium ion battery, it is characterised in that: its electrolyte use one described in any one of claim 1-9 based on
The Overcharge prevention electrolyte of ternary lithium ion battery.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106887641A (en) * | 2017-01-09 | 2017-06-23 | 北京鼎能开源电池科技股份有限公司 | A kind of ternary battery Overcharge prevention electrolyte and preparation method thereof |
| CN106972197A (en) * | 2017-04-28 | 2017-07-21 | 山东海容电源材料股份有限公司 | A kind of anti-overcharge lithium battery electrolytes and preparation method thereof |
| CN107437634A (en) * | 2017-06-26 | 2017-12-05 | 广东天劲新能源科技股份有限公司 | A kind of ternary lithium electricity Overcharge prevention electrolyte and lithium ion battery |
| CN108470947A (en) * | 2018-03-30 | 2018-08-31 | 北京国能电池科技股份有限公司 | For lithium battery electrolytes anti-overcharge additive and include its lithium battery electrolytes |
| CN110289443A (en) * | 2019-07-26 | 2019-09-27 | 珠海冠宇电池有限公司 | A kind of anti-overcharge lithium ion battery and preparation method thereof |
| CN113555599A (en) * | 2020-04-02 | 2021-10-26 | 深圳格林德能源集团有限公司 | High-safety lithium ion battery for mobile power supply |
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| CN106887641A (en) * | 2017-01-09 | 2017-06-23 | 北京鼎能开源电池科技股份有限公司 | A kind of ternary battery Overcharge prevention electrolyte and preparation method thereof |
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| CN106972197B (en) * | 2017-04-28 | 2019-07-02 | 山东海容电源材料股份有限公司 | A kind of anti-overcharge lithium battery electrolytes and preparation method thereof |
| CN107437634A (en) * | 2017-06-26 | 2017-12-05 | 广东天劲新能源科技股份有限公司 | A kind of ternary lithium electricity Overcharge prevention electrolyte and lithium ion battery |
| CN108470947A (en) * | 2018-03-30 | 2018-08-31 | 北京国能电池科技股份有限公司 | For lithium battery electrolytes anti-overcharge additive and include its lithium battery electrolytes |
| CN110289443A (en) * | 2019-07-26 | 2019-09-27 | 珠海冠宇电池有限公司 | A kind of anti-overcharge lithium ion battery and preparation method thereof |
| CN113555599A (en) * | 2020-04-02 | 2021-10-26 | 深圳格林德能源集团有限公司 | High-safety lithium ion battery for mobile power supply |
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