CN106129314B - A kind of power lithium-ion battery - Google Patents
A kind of power lithium-ion battery Download PDFInfo
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- CN106129314B CN106129314B CN201610667836.6A CN201610667836A CN106129314B CN 106129314 B CN106129314 B CN 106129314B CN 201610667836 A CN201610667836 A CN 201610667836A CN 106129314 B CN106129314 B CN 106129314B
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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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
- 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
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- 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
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Abstract
The invention discloses a kind of power lithium-ion batteries, including anode, cathode, diaphragm, electrolyte, shell and pole, diaphragm includes polymeric matrix layer and the organic-inorganic layer in polymeric matrix layer two sides, the organic-inorganic layer inorganic particle different containing average grain diameter respectively, the inorganic particle average grain diameter of one of them is 0.05-0.1 μm, another inorganic particle average grain diameter is 0.15-0.2 μm, inorganic particle includes barium zirconium phthalate, electrolyte includes organic solvent, lithium salts and temperature additive, and temperature additive includes sodium selenite.Power lithium-ion battery of the invention can effectively increase the cycle life and cryogenic property of ion battery, and then reduce the use cost of electric car, widen the territory of use of electric car.
Description
Technical field
The present invention relates to a kind of battery more particularly to a kind of power lithium-ion batteries.
Background technique
It is well known that lithium ion battery has, voltage is high, specific energy is big, charge discharge life is long, discharge performance is stable, uses
The advantages that safe, environmentally friendly, increasingly obtain the extensive use of people.
The operating temperature of lithium ion battery is generally within the scope of -20 DEG C to 60 DEG C, and as lithium ion battery is in electronic vapour
Application in vehicle, at -20 DEG C hereinafter, especially in north cold area, power lithium-ion battery makes low temperature use scope
- 40 DEG C are sometimes up to temperature.It has been reported that discharge capacity of the cell is extremely low or even cannot put at -40 DEG C.From lithium ion
The influence factor of battery is seen, most of related with electrolyte.Therefore, lithium ion can be improved by optimizing the structure of electrolyte
The low temperature performance of battery, the solvent for such as selecting operating temperature range wide；Mixed solvent system is considered, to solve electrolyte
Safety and environmental suitability；Suitable solute is selected, the environmental suitability of battery is improved；Add suitable pair of favors low temperature
Additive, improve filming performance, guarantee electrode/electrolyte interface stability so that improve battery cryogenic property.
In addition to cryogenic property, another bottleneck of power lithium-ion battery is the service life of power battery.Existing ternary is just
The cycle life of the lithium ion battery of pole material can achieve 800-1000 times, if primary every charging in 2 days, power battery
Service life be only 5 years or so.If the service life of power battery can improve, power battery can be effectively reduced
Use cost, to greatly push the universal of pure electric automobile.
Summary of the invention
The purpose of the present invention is to propose to a kind of power lithium-ion batteries, with good cryogenic property and cycle life.
Researcher of the invention has found that the organic-inorganic layer on two sides of diaphragm matrix layer divides in studying for a long period of time
Barium zirconium phthalates not different containing average grain diameter, can effectively improve the cycle life of lithium ion battery, this may be because
The barium zirconium phthalate of the different-grain diameter of diaphragm two sides improves diffusion of the lithium ion in diaphragm, and then improves cyclicity
Energy.
Researcher of the invention also found in studying for a long period of time, after adding sodium selenite in electrolyte, lithium-ion electric
Pond still is able to carry out high current charge-discharge in a low temperature of -40 DEG C, this may be that selenite radical ion and sodium ion enhance
The low temperature diffusion ability of the low-temperature stability and lithium ion of solid electrolyte interface (SEI) film in the electrolytic solution, to improve
The cryogenic property of lithium ion battery.
Technical scheme is as follows: a kind of power lithium-ion battery, including anode, cathode, diaphragm, electrolyte, outer
Shell and pole, diaphragm include polymeric matrix layer and the organic-inorganic layer for being distributed in polymeric matrix layer two sides, and two organic
The inorganic particle different containing average grain diameter, the inorganic particle average grain diameter of one of organic-inorganic layer are inorganic layer respectively
0.05-0.1 μm, the inorganic particle average grain diameter of another organic-inorganic layer is 0.15-0.2 μm, and inorganic particle includes zirconium metatitanic acid
Barium, electrolyte include organic solvent, lithium salts and temperature additive, and temperature additive includes sodium selenite.
Preferably, the polymeric matrix layer with a thickness of 10-40 μm, the organic-inorganic layer with a thickness of 0.8-1 μ
m。
Preferably, the inorganic particle occupies the 6-15wt% of machine inorganic layer.
Preferably, the polymer is ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, styrene-
Methacrylic acid copolymer, Styrene-methyl Acrylic Acid Copolymer, Styrene-acrylic copolymer, ethylene propylene diene rubber, sulphur
It is poly- to change ethylene propylene diene rubber, sulfonated butyl rubber, sulfonation butadiene-styrene rubber, Carboxylation polystyrene, Carboxylation polyethylene and sulfonation
One of styrene is a variety of.
Preferably, the organic solvent is dimethyl carbonate, diethyl carbonate, ethylene carbonate, propene carbonate, carbon
One of sour methyl ethyl ester is a variety of.
Preferably, the lithium salts is lithium hexafluoro phosphate, LiBF4, di-oxalate lithium borate or difluorine oxalic acid boracic acid lithium
One of or it is a variety of.
Preferably, it is 5~15% that the temperature additive, which accounts for the mass percent of the electrolyte,.
The invention has the following advantages that
1, the barium zirconium phthalate different containing average grain diameter respectively of the organic-inorganic layer on two sides of diaphragm matrix layer, has
Improve to effect the cycle life of lithium ion battery.
2, sodium selenite is added in the electrolyte of lithium ion battery, improves the cryogenic property of lithium ion battery.
3, power lithium-ion battery of the invention is applied on electric car, can effectively reduce the cost of electric car,
The using area for widening electric car, especially in cold district.
Detailed description of the invention
Fig. 1 is power lithium-ion battery internal structure chart of the invention.
Fig. 2 is the cycle life test chart of the embodiment of the present invention 1 and comparative example 1.
Fig. 3 is the low-temperature test figure of the embodiment of the present invention 1 and comparative example 2.
Specific embodiment
To better illustrate the present invention, with reference to the attached drawing in the embodiment of the present invention, to the skill in the embodiment of the present invention
Art scheme is clearly and completely described.
As shown in Figure 1, power lithium-ion battery of the invention, including anode 2, cathode 3, diaphragm 5, electrolyte (are not marked
Note), shell 1 and pole 4.Battery size is 36mm × 130mm × 155mm.
Anode 2 includes positive active material, binder and conductive agent.Positive active material include more than one can be embedding
Enter the positive electrode with deintercalation as the lithium of electrode reaction object.As such positive electrode, it may for example comprise lithia, vulcanization
Lithium, the intercalation compound containing lithium or lithium-containing compound such as lithium phosphate compound.Particularly, comprising lithium and transition metal element
Composite oxides or phosphate compounds comprising lithium and transition metal element are preferred.Especially, comprising cobalt (Co),
At least one of nickel, manganese (Mn), iron, aluminium, vanadium (V) and titanium (Ti) are preferred as the compound of transition metal element.Its
Chemical formula is for example, by LixMIO2Or LiyMIIPO4It indicates.In formula, MIAnd MIIInclude more than one transition metal elements.X and y
Value changed according to the charging and discharging state of battery, and usually in the model of 0.05≤x≤1.10 and 0.05≤y≤1.10
In enclosing.
As the specific example comprising lithium and the composite oxides of transition metal element, including lithium-cobalt composite oxide
(LiCoO2), lithium-ni compound oxide (LiNiO2), lithium-nickel-cobalt composite oxides [LixNi(1-z)CozO2(z < 1)], lithium-
Nickel-cobalt-manganese composite oxide [LixNi(1-v-w)CovMnwO2(v+w < 1)], the lithium-manganese composite oxide with spinel structure
(LiMn2O4) etc..As the specific example comprising lithium and the phosphate compounds of transition metal element, for example including lithium-iron phosphoric acid
Salt compound (LiFePO4), lithium-iron-manganese phosphate compound [LiFe1-uMnuPO4(u < 1)] etc..
It further comprise other metallic compounds or high molecular material as the positive electrode that can be embedded in removal lithium embedded.
As other metallic compounds, it may for example comprise oxide such as titanium oxide, vanadium oxide and manganese dioxide；And disulphide such as two
Titanium sulfide and molybdenum disulfide.As high molecular material, it may for example comprise polyaniline, polythiophene etc..
Anode may include conductive agent and/or binder.As conductive agent, it may for example comprise carbon material such as graphite, carbon black and
Ke Qinhei (ketjenblack).It can be used alone one such or two or more in them by being used in mixed way.
Moreover, other than carbon material metal material, conductive polymer material etc. can also be used, as long as the material is conductive.Make
For binder, it may for example comprise synthetic rubber such as butadiene-styrene rubber, Viton and ethylene propylene diene rubber or high molecular material
Such as polyvinylidene fluoride.It can be used alone one such or two or more in them by being used in mixed way.
Cathode 3 includes negative electrode active material, binder, conductive agent and circulation additive.Negative electrode active material can be stone
Ink, because graphite has big electrochemical equivalent and is capable of providing high-energy density.As graphite, natural graphite and artificial stone
Mo Jun is preferred.Binder can be Kynoar, show high lithium migration, and obtain excellent circulation
Characteristic.Conductive agent is one of carbon nano-fiber, acetylene black, carbon nanotube or graphene or a variety of.
Diaphragm 52 separates anode with cathode 3, prevents the short circuit current due to caused by the contact of two electrodes, and make lithium from
Son passes through.Diaphragm includes polymeric matrix layer and the organic-inorganic layer for being distributed in polymeric matrix layer two sides, two organic nothings
The inorganic particle different containing average grain diameter, the inorganic particle average grain diameter of one of organic-inorganic layer are machine layer respectively
0.05-0.1 μm, the inorganic particle average grain diameter of another organic-inorganic layer is 0.15-0.2 μm, and the inorganic particle includes zirconium
Barium titanate.Inorganic particle still further comprises one of aluminium oxide, titanium oxide, calcium oxide, zinc oxide, copper oxide and manganese oxide
Or it is a variety of.Polymer is ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, styrene-t copolymerization
Object, Styrene-methyl Acrylic Acid Copolymer, Styrene-acrylic copolymer, ethylene propylene diene rubber, sulfonated EPDM,
One of sulfonated butyl rubber, sulfonation butadiene-styrene rubber, Carboxylation polystyrene, Carboxylation polyethylene and sulfonated polystyrene or
It is a variety of.
The preparation of polymeric matrix is that (be averaged grain with hydrotalcite by by polymer (such as ethylene-acrylic acid copolymer)
Diameter is 57nm) mixing, (revolving speed 150r/min, 170 degree of temperature) is squeezed out through single screw extrusion machine, prepares master batch；It then will be female
Grain is mixed with base polyethylene, and the revolving speed extrusion in double screw extruder with 300r/min prepares membrane polymer matrix material
Material；Then polymeric matrix layer is made in composite material using spin processes.
The preparation of organic-inorganic layer is to mix ethylene-acrylic acid copolymer, barium zirconium phthalate, aluminium oxide, is squeezed through single screw rod
Machine squeezes out (revolving speed 150r/min, 170 degree of temperature) out, prepares organic inorganic layer.
The preparation of diaphragm is hot-pressed onto inorganic materials on two side surfaces of polymeric matrix, and diaphragm is obtained.Its
In, polymeric matrix layer with a thickness of 10-40 μm, the organic-inorganic layer with a thickness of 0.8-1 μm
Electrolyte is immersed in diaphragm 5.Electrolyte includes organic solvent, lithium salts and temperature additive.Temperature additive is
Sodium selenite.
As solvent, for example, may include room temperature molten salt such as ethylene carbonate, propene carbonate, butylene carbonate, carbon
Dimethyl phthalate, diethyl carbonate, methyl ethyl carbonate, gamma-butyrolacton, gamma-valerolactone, 1,2- dimethoxy-ethane, tetrahydrofuran,
2- methyltetrahydrofuran, 1,3-dioxolane, 4- methyl-1,3- dioxolanes, methyl acetate, methyl propionate, ethyl propionate, second
Nitrile, glutaronitrile, adiponitrile, methoxyacetonitrile, 3- methoxypropionitrile, n,N-Dimethylformamide, N-Methyl pyrrolidone, N- first
Base oxazolidone, nitromethane, nitroethane, sulfolane, dimethyl sulfoxide, trimethyl phosphate, glycol sulfite and double three
Methyl fluoride sulfimide base trimethyl ammonium.It can be used alone one of above-mentioned solvent, or can be made by mixing
With therein a variety of.Particularly, ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate
At least one of be it is preferred, since thus, it is possible to obtain excellent battery capacity, excellent cycle characteristics and excellent
Storage characteristics.In this case, especially, high viscosity (high dielectric constant) solvent (for example, permittivity ε >=30) such as carbonic acid
Ethyl and propylene carbonate and low viscosity solvent (for example, viscosity≤1mpas) such as dimethyl carbonate, methyl ethyl carbonate and carbon
The mixture of diethyl phthalate is preferred.It is thus possible to improve the dissociation properties and ionic mobility of electrolytic salt, thus can be with
Obtain higher effect.
As lithium salts, it may for example comprise lithium salts such as lithium hexafluoro phosphate (LiPF6), bis- (pentafluoroethyl group sulfonyl) imine lithium [Li
(C2F5SO2)2N], lithium perchlorate (LiClO4), hexafluoroarsenate lithium (LiAsF6), LiBF4 (LiBF4), trifluoromethane sulfonic acid
Lithium (LiSO3CF3), bis- (trifluoromethyl sulfonyl) imine lithium [Li (CF3SO2)2N], three (trifluoromethyl sulfonyl) lithium methides
[LiC(SO2CF3)3], lithium chloride (LiCl) and lithium bromide (LiBr).It can be used alone one of electrolytic salt, or can be with
It is two or more in them by being used in mixed way.In particular it is preferred to include lithium hexafluoro phosphate (LiPF6)。
Power lithium-ion battery of the invention can be produced using existing technology in this field.It is exemplified below:
Firstly, forming anode and forming positive electrode active material layer on positive electrode collector.By positive active material, lead
Electric agent and binder mixing are dispersed in solvent such as n-methyl-2-pyrrolidone with preparing cathode mix to be pasted
Shape cathode mix slurry.Then, positive electrode collector is coated with the cathode mix slurry, and makes solvent seasoning.Later, by institute
Object is obtained by compression mouldings such as roll squeezers, to form positive electrode active material layer.In addition, positive electrode active material layer can be by will just
Pole mixture is adhered on positive electrode collector and is formed.
In addition, being formed and forming negative electrode active material layer on negative electrode collector negative in a manner of identical with anode
Pole.Carbon material and lithium-containing compound and binder as negative electrode active material such as graphite are mixed to prepare cathode and mix
Object is dispersed in solvent such as n-methyl-2-pyrrolidone, to obtain paste negative electrode mix slurry.Then, with the cathode
Mixture paste coats negative electrode collector, and makes solvent seasoning.Later, by gains by compression mouldings such as roll squeezers, with shape
At negative electrode active material layer.Therefore, cathode is formd.In addition, negative electrode active material layer can be by adhering to negative electrode mix
It is formed on negative electrode collector.
Then, positive wire is connected to positive electrode collector by means of modes such as welding, and by negative wire by means of weldering
It the modes such as connects and is connected to negative electrode collector.Later, anode and diaphragm of the cathode between are subjected to stacking and form battery core.Then
Battery core is packed into shell and toasts 30h, carries out fluid injection, assembly, and the processes such as chemical conversion, partial volume finally obtain power lithium-ion battery.
Specific embodiments of the present invention are given below to be described in detail.
Embodiment 1:21Ah power lithium-ion battery
Positive active material is using LiNi1/3Co1/3Mn1/3O2.Binder is Kynoar.Conductive agent is nanometer
One of carbon fiber, acetylene black, carbon nanotube or graphene are a variety of.In the present embodiment 1, conductive agent uses acetylene black.
Positive active material, binder, conductive agent weight percent be respectively 93%:4%:3%.
Cathode includes negative electrode active material, binder, conductive agent and circulation additive.Negative electrode active material is artificial stone
Ink, binder are Kynoar, and conductive agent is carbon nano-fiber, and circulation additive is barium zirconium phthalate.Negative electrode active material glues
Tying agent, conductive agent and recycling the mass parts ratio of additive is 100:5:5:6.
Electrolyte uses organic mixed solution of the lithium salts of 1.2mol/L, and lithium salts uses lithium hexafluoro phosphate, and organic solvent is
Dimethyl carbonate, ethylene carbonate, propene carbonate, methyl ethyl carbonate mix at 1: 1: 1: 1 in molar ratio.Temperature additive
For sodium selenite, the mass percent for accounting for electrolyte is 5%.
In diaphragm the inorganic particle average grain diameter of an organic-inorganic layer be 0.05 μm, another organic-inorganic layer it is inorganic
Mean particle size is 0.15 μm.Polymeric matrix layer with a thickness of 40 μm, porosity 41%, (ethylene-acrylic acid is total for polymer
Polymers) 10wt% is accounted for, hydrotalcite accounts for 5wt%.Organic-inorganic layer with a thickness of 0.9 μm, wherein organic matter is total for ethylene-acrylic acid
Polymers, content 43wt%, barium zirconium phthalate content are 6wt%, alumina content 45wt%.
Low-temperature test carried out to the power lithium-ion battery of embodiment 1: after battery is fully charged at normal temperature, at -40 DEG C ± 2
20h is stored at DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is specified
The 92.7% of capacity.
Cycle life test is carried out to the power lithium-ion battery of embodiment 1: charge and discharge being carried out with 3C electric current at normal temperature,
After circulation 2000 times, capacity retention ratio 88.9%.
Embodiment 2:21Ah power lithium-ion battery
Except the inorganic particle that the inorganic particle average grain diameter of an organic-inorganic layer is 0.1 μm, another organic-inorganic layer
Average grain diameter is 0.2 μm, to account for the mass percent of electrolyte be except 15% to temperature additive, remaining is the same as embodiment 1.
Low-temperature test carried out to the power lithium-ion battery of embodiment 2: after battery is fully charged at normal temperature, at -40 DEG C ± 2
20h is stored at DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is specified
The 91.3% of capacity.
Cycle life test is carried out to the power lithium-ion battery of embodiment 2: charge and discharge being carried out with 3C electric current at normal temperature,
After circulation 2000 times, capacity retention ratio 89.7%.
Embodiment 3:21Ah power lithium-ion battery
Except the inorganic particle that the inorganic particle average grain diameter of an organic-inorganic layer is 0.06 μm, another organic-inorganic layer
Average grain diameter is 0.18 μm, temperature additive accounts for the mass percent of electrolyte and is except 10%,.Remaining is the same as embodiment 1.
Low-temperature test carried out to the power lithium-ion battery of embodiment 3: after battery is fully charged at normal temperature, at -40 DEG C ± 2
20h is stored at DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is specified
The 92.1% of capacity.
Cycle life test is carried out to the power lithium-ion battery of embodiment 3: charge and discharge being carried out with 3C electric current at normal temperature,
After circulation 2000 times, capacity retention ratio 87.3%.
Comparative example 1:21Ah power lithium-ion battery
In addition to not adding barium zirconium phthalate, remaining is the same as embodiment 1.
Low-temperature test carried out to the power lithium-ion battery of comparative example 1: after battery is fully charged at normal temperature, at -40 DEG C ± 2
20h is stored at DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is specified
The 91.7% of capacity.
Cycle life test is carried out to the power lithium-ion battery of comparative example 1: charge and discharge being carried out with 3C electric current at normal temperature,
After circulation 1000 times, capacity retention ratio 75.1%, after recycling 2000 times, capacity retention ratio 30.5%.
Comparative example 2:21Ah power lithium-ion battery
In addition to not adding sodium selenite, remaining is the same as embodiment 1.
- 20 DEG C of tests are carried out to the power lithium-ion battery of comparative example 2: after battery is fully charged at normal temperature, -20 DEG C ±
20h is stored at 2 DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is volume
The 30.2% of constant volume.
- 40 DEG C of tests are carried out to the power lithium-ion battery of comparative example 2: after battery is fully charged at normal temperature, -40 DEG C ±
20h is stored at 2 DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is volume
The 10.8% of constant volume.
Cycle life test is carried out to the power lithium-ion battery of comparative example 2: charge and discharge being carried out with 3C electric current at normal temperature,
After circulation 2000 times, capacity retention ratio 87.8%.
Comparative example 3:21Ah power lithium-ion battery
In addition to not adding barium zirconium phthalate and sodium selenite, remaining is the same as embodiment 1.
- 20 DEG C of tests are carried out to the power lithium-ion battery of comparative example 3: after battery is fully charged at normal temperature, -20 DEG C ±
20h is stored at 2 DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is volume
The 29.7% of constant volume.
- 40 DEG C of tests are carried out to the power lithium-ion battery of comparative example 3: after battery is fully charged at normal temperature, -40 DEG C ±
20h is stored at 2 DEG C, then at the same temperature, with 3C current discharge, until final discharging voltage 2.0V, discharge capacity is volume
The 9.7% of constant volume.
Cycle life test is carried out to the power lithium-ion battery of comparative example 3: charge and discharge being carried out with 3C electric current at normal temperature,
After circulation 1000 times, capacity retention ratio 73.4%, after recycling 2000 times, capacity retention ratio 28.9%.
From figures 2 and 3, it will be seen that battery can be significantly improved by being added to the different barium zirconium phthalate of average grain diameter in diaphragm
Cycle performance.The cryogenic property of battery can be significantly improved by being added to sodium selenite in the electrolytic solution.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (6)
1. a kind of power lithium-ion battery, including anode, cathode, diaphragm, electrolyte, shell and pole, the diaphragm includes poly-
The organic-inorganic layer for closing object base layer and being distributed in polymeric matrix layer two sides, two organic-inorganic layers contain average grain respectively
The different inorganic particle of diameter, the inorganic particle average grain diameter of one of organic-inorganic layer are 0.05-0.1 μm, another is organic
The inorganic particle average grain diameter of inorganic layer is 0.15-0.2 μm, and the inorganic particle includes barium zirconium phthalate, and the electrolyte includes
Organic solvent, lithium salts and temperature additive, the temperature additive includes sodium selenite, and the temperature additive accounts for the electrolysis
The mass percent of liquid is 5~15%.
2. power lithium-ion battery according to claim 1, wherein the polymeric matrix layer with a thickness of 10-40 μm,
The organic-inorganic layer with a thickness of 0.8-1 μm.
3. power lithium-ion battery according to claim 1 or 2, wherein the barium zirconium phthalate occupies the 6- of machine inorganic layer
15wt%.
4. power lithium-ion battery according to claim 3, wherein the polymer is ethylene-methyl methacrylate copolymerization
Object, ethylene-acrylic acid copolymer, Styrene-methyl Acrylic Acid Copolymer, Styrene-acrylic copolymer, ethylene-propylene-diene monomer
Glue, sulfonated EPDM, sulfonated butyl rubber, sulfonation butadiene-styrene rubber, Carboxylation polystyrene, Carboxylation polyethylene and sulphur
Change one of polystyrene or a variety of.
5. power lithium-ion battery according to claim 3, wherein the organic solvent is dimethyl carbonate, carbonic acid two
One of ethyl ester, ethylene carbonate, propene carbonate, methyl ethyl carbonate are a variety of.
6. power lithium-ion battery according to claim 3, wherein the lithium salts be lithium hexafluoro phosphate, LiBF4,
One of di-oxalate lithium borate or difluorine oxalic acid boracic acid lithium are a variety of.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610667836.6A CN106129314B (en) | 2016-08-15 | 2016-08-15 | A kind of power lithium-ion battery |
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| CN107666012B (en) * | 2017-09-11 | 2019-10-11 | 江苏海涛新能源科技有限公司 | A kind of secondary cell electrolyte and preparation method thereof |
| KR102229449B1 (en) * | 2017-10-26 | 2021-03-17 | 주식회사 엘지화학 | Seperator and lithium sulfur battery comprising the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101350420A (en) * | 2008-07-22 | 2009-01-21 | 山东东岳神舟新材料有限公司 | Inorganics doping multi-layer fluorine-containing ion-exchange film |
| CN102781667A (en) * | 2010-04-19 | 2012-11-14 | 三菱树脂株式会社 | Laminated porous film, separator for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery |
| CN104205417A (en) * | 2012-03-27 | 2014-12-10 | 东丽株式会社 | Laminated porous film and separator for electrical energy storage device |
| CN104300103A (en) * | 2007-11-21 | 2015-01-21 | 株式会社Lg化学 | Secondary battery with improved storage characteristics and method for manufacturing the same |
-
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- 2016-08-15 CN CN201610667836.6A patent/CN106129314B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300103A (en) * | 2007-11-21 | 2015-01-21 | 株式会社Lg化学 | Secondary battery with improved storage characteristics and method for manufacturing the same |
| CN101350420A (en) * | 2008-07-22 | 2009-01-21 | 山东东岳神舟新材料有限公司 | Inorganics doping multi-layer fluorine-containing ion-exchange film |
| CN102781667A (en) * | 2010-04-19 | 2012-11-14 | 三菱树脂株式会社 | Laminated porous film, separator for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery |
| CN104205417A (en) * | 2012-03-27 | 2014-12-10 | 东丽株式会社 | Laminated porous film and separator for electrical energy storage device |
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