CN107768733A - A kind of lithium battery and preparation method thereof - Google Patents
A kind of lithium battery and preparation method thereof Download PDFInfo
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- CN107768733A CN107768733A CN201710954806.8A CN201710954806A CN107768733A CN 107768733 A CN107768733 A CN 107768733A CN 201710954806 A CN201710954806 A CN 201710954806A CN 107768733 A CN107768733 A CN 107768733A
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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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention relates to technical field of lithium batteries, more particularly to a kind of lithium battery and preparation method thereof, the lithium battery, including positive pole, negative pole, barrier film and electrolyte, the positive pole includes plus plate current-collecting body and coated in the positive electrode on the plus plate current-collecting body, wherein, the plus plate current-collecting body is graphitization alkene layer aluminium foil；The negative pole includes negative current collector and coated in the negative material on the negative current collector, wherein, the negative current collector is graphitization alkene layer copper foil.Graphitization alkene layer aluminium foil and graphitization alkene layer copper foil is respectively adopted as plus plate current-collecting body and negative current collector in the present invention, not only increase the electric conductivity of plus plate current-collecting body and negative current collector, graphite ene coatings can also avoid the oxidation of metal, so as to improve the efficiency for charge-discharge of lithium battery and cycle performance.
Description
Technical field
The present invention relates to technical field of lithium batteries, in particular it relates to a kind of lithium battery and preparation method thereof.
Background technology
Lithium ion battery passes through development for many years, has become the new-energy automobile power source being most widely used instantly,
It is widely used in electric vehicle field, such as hybrid-power bus, pure electric bus.And in lithium ion battery
Use during, efficiency for charge-discharge problem is the key point of capacity usage ratio and received much concern, and current techniques personnel grind
One of major issue studied carefully.Internal resistance is one of key factor for influenceing efficiency for charge-discharge and cycle life.Big internal resistance can cause
Battery significantly declines in high-power output than energy, so that startability is deteriorated；Raise battery temperature, security by
To threat；And shorten the cycle life of battery.
At present, LiFePO4 and nickel-cobalt-manganese ternary material are two kinds of anode material for lithium-ion batteries of greatest concern.Phosphoric acid
Iron lithium anode material is because it than nickel-cobalt-manganese ternary material has higher heat decomposition temperature, and is shown in charge and discharge process
More preferable thermodynamic stability, it is considered to be the anode material for lithium-ion batteries of safety and reliability.And in LiFePO4 structure
Polyanion ensure that its structural stability during repeated charge；LiFePO4And FePO4Structure is similar, volume phase
Closely, therefore structure and Volume Changes are small in charge and discharge process so that LiFePO4 has excellent cycle performance.But it is limited to material
The theoretical specific capacity of the low electrical conductivity of material itself and 170mAh/g so that it shows slightly in aspect of performances such as Energy Efficiency Ratio, energy densities
Deficiency.Therefore, it is the key for promoting it further to apply to improve the Energy Efficiency Ratio of ferric phosphate lithium cell and energy density.
The content of the invention
The problem of in order to overcome prior art to exist, an object of the present invention are to provide a kind of lithium battery, the lithium electricity
Pond has good Energy Efficiency Ratio.
The second object of the present invention is to provide a kind of preparation method of lithium battery.
It was found by the inventors of the present invention that the electric conductivity of lithium battery anode and negative pole be influence charging and discharging lithium battery efficiency because
One of element, charging and discharging lithium battery efficiency with lithium battery anode, the electric conductivity of cathode of lithium battery raising and improve, and collector is
Influence positive pole and one of an important factor for negative conductive, and traditional metal collector lithium battery preparation and use process
In, easily aoxidize, cause the reduction of its electric conductivity, so as to influence the charge-discharge performance of lithium battery.
To achieve these goals, the present invention provides a kind of lithium battery, including positive pole, negative pole, barrier film and electrolyte, described
Positive pole includes plus plate current-collecting body and coated in the positive electrode on the plus plate current-collecting body, wherein, the plus plate current-collecting body is painting
Graphene layer aluminium foil；
The negative pole includes negative current collector and coated in the negative material on the negative current collector, wherein, it is described negative
Pole collector is graphitization alkene layer copper foil.
The present invention also provides a kind of preparation method of lithium battery, comprises the following steps：
(1) preparation of positive pole；
(2) preparation of negative pole；
(3) electrolyte is injected after being molded positive pole, negative pole and membrane winding, inert gas is then filled with into lithium battery,
Be 0.3~3MPa to pressure, then by lithium battery at 20~35 DEG C upright 6-24h, then the upright 6-24h at 40-55 DEG C, so
After be evacuated to pressure to obtain lithium battery after sealing under -0.08~-0.05MPa.
Pass through above-mentioned technical proposal, the present invention have following technique effect：
(1) graphitization alkene layer aluminium foil and graphitization alkene layer copper foil is respectively adopted as plus plate current-collecting body and negative pole collection in the present invention
Fluid, the electric conductivity of plus plate current-collecting body and negative current collector being not only increased, graphite ene coatings can also avoid the oxidation of metal,
So as to improve the efficiency for charge-discharge of lithium battery and cycle performance；
(2) in battery preparation, in the impregnation process of electrolyte, by injecting inert gas, inside battery is improved
Pressure enables electrode slice to be infiltrated completely by electrolyte, so as in the charge and discharge process in later stage, improve the biography of ion and electronics
Defeated efficiency, improve the Energy Efficiency Ratio of lithium battery.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is for providing a further understanding of the present invention, and a part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 be in the embodiment of the present invention 1 lithium battery temperature be 25 DEG C, discharge-rate be 0.5C under discharge curve；
Fig. 2 is that lithium battery in temperature is 25 DEG C in the embodiment of the present invention 1, and discharge-rate is that the cycle performance under 0.5C is bent
Line；
Fig. 3 be in the embodiment of the present invention 1 lithium battery temperature be -20 DEG C, discharge-rate be 0.5C under discharge curve；
Fig. 4 be in the embodiment of the present invention 1 lithium battery temperature be 55 DEG C, discharge-rate be 0.5C under discharge curve.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
In order to optimize the efficiency for charge-discharge of lithium battery, the present invention provides a kind of lithium battery, including positive pole, negative pole, barrier film and
Electrolyte, the positive pole include plus plate current-collecting body and coated in the positive electrodes on the plus plate current-collecting body, wherein, the positive pole
Collector is graphitization alkene layer aluminium foil；
The negative pole includes negative current collector and coated in the negative material on the negative current collector, wherein, it is described negative
Pole collector is graphitization alkene layer copper foil.
In the present invention, using graphitization alkene layer aluminium foil and graphitization alkene layer copper foil as plus plate current-collecting body and negative pole currect collecting
Body, the electric conductivity of plus plate current-collecting body and negative current collector being not only increased, graphite ene coatings can also avoid the oxidation of metal, from
And improve the efficiency for charge-discharge and cycle performance of lithium battery.
According to the present invention, the graphitization alkene layer aluminium foil includes aluminium foil and the first graphene coated in aluminium foil surface applies
Layer, in order to optimize the electric conductivity of graphitization alkene layer aluminium foil, under preferable case, the thickness of the aluminium foil is 14-20 μm；Described first
The thickness of graphite ene coatings is 1-3 μm.
According to the present invention, the graphitization alkene layer copper foil includes copper foil and the second graphene coated in copper foil surface applies
Layer, in order to optimize the electric conductivity of graphitization alkene layer copper foil, under preferable case, the thickness of the copper foil is 7-11 μm；Described second
The thickness of graphite ene coatings is 1-3 μm.
According to the present invention, the electrolyte is the mixed solution of electrolyte lithium salt and nonaqueous solvents, the nonaqueous solvents bag
Include ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate, and the ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate
Volume ratio is 1：(0.8~1.2)：(0.8~1.2), more preferably 1:1:1.In order to which battery is formed in formation process
Stable fine and close SEI films, reduce the internal resistance of battery；Under preferable case, coalescents, the film forming are also contained in the electrolyte
Auxiliary agent is selected from least one of vinylene carbonate, propylene sulfite and ethylene sulfite, it is further preferred that with institute
On the basis of the gross weight for stating electrolyte, the content of the coalescents is 0.5~3 weight %.
According to the present invention, in order to improve the cycle efficieny of battery, the cycle life of battery is improved, it is described under preferable case
Also containing glycol dimethyl ether in electrolyte, the content of the glycol dimethyl ether is 0.5~3 weight %,
According to the present invention, the electrolyte can use the conventional nonaqueous electrolytic solution in this area.Such as electrolyte lithium salt choosing
From lithium hexafluoro phosphate (LiPF6), lithium perchlorate, LiBF4, hexafluoroarsenate lithium, lithium halide, chlorine lithium aluminate and fluorohydrocarbon base sulphur
One or more in sour lithium, the concentration of electrolyte is generally 1~1.3mol/L in electrolyte.
According to the present invention, the positive electrode includes positive electrode active materials, conductive agent, binding agent, the positive-active material
Material includes carbon-coated LiFePO 4 for lithium ion batteries, and the volume average particle size distribution D50 of the carbon-coated LiFePO 4 for lithium ion batteries is 7~15 μm, vibration density
Spend 0.8~1.8g/cm3, specific surface area be 7~22m2/g。
The carbon-coated LiFePO 4 for lithium ion batteries positive electrode with high conductivity is used in the present invention, it compensate for LiFePO4 itself
The defects of electric conductivity deficiency, be advantageous to the performance of material capacity, and reduce the contact resistance of battery, by controlling carbon coating phosphoric acid
The particle diameter and pole piece compaction density of iron lithium, can improve the porosity of positive pole, imbibition of the increase positive pole to electrolyte, protect liquid energy
Power, reduce polarization of the battery in charge and discharge process, improve the efficiency for charge-discharge and cycle life of lithium battery.
According to the present invention, the dosage of each material in positive electrode can be adjusted according to being actually needed, for example, at this
In a kind of embodiment being more highly preferred to of invention, in order to further improve obtained lithium iron phosphate dynamic battery at low temperature
Cycle performance, on the basis of the gross weight of positive electrode, the content of the positive electrode active materials is 94-97.7 weight %, conduction
The content of agent is 0.8~3 weight %, the content of binding agent is 1.0~3.5 weight %.
According to the present invention, the conductive agent can be type commonly used in the art, for example, the conductive agent can select
From carbon black, electrically conductive graphite, CNT, graphene and carbon nano-fiber etc., under preferable case, the conductive agent is selected from acetylene
Black, conductive black, graphite is dilute and CNT at least two.
According to the present invention, the binding agent can be type commonly used in the art, for example, the binding agent can select
From polyvinyl alcohol, polyvinylidene fluoride, sodium carboxymethylcellulose, TPO binding agent and Viton etc., under preferable case,
The binding agent is polyvinylidene fluoride.
According to the present invention, in order to further optimize the discharging efficiency of lithium battery, under preferable case, the lithium battery anode
Compacted density is 2~2.6g/cm3, more preferably 2.2~2.4g/cm3。
According to the present invention, in order to further optimize the discharging efficiency of lithium battery, under preferable case, the lithium battery anode
Surface density is 150~168g/cm2, more preferably 155~161g/cm2。
According to the present invention, the negative material includes negative active core-shell material, conductive agent, binding agent, the negative electrode active material
Material includes Delanium.The space availability ratio of Delanium can be improved by improving tap density, improves the space of lithium battery
Utilization rate, but if its tap density and compacted density are too high, it is obvious that negative pole resilience is not only resulted in so that assembling coefficient mistake
Height, cause into shell difficulty is big or later stage battery core bulging, potential safety hazard etc. be present, the fragility for also resulting in negative pole becomes big, is winding
Pole piece is broken when Battery Pole Core, can not only improve the low-temperature circulating performance of battery, even more so that the preparation of battery
It can not complete.
Under preferable case, the tap density of the Delanium is 0.8~1.2g/cm3, 2~5m of specific surface area2/g.Root
According to the present invention, the dosage of each material in negative material can be adjusted according to being actually needed, for example, in one kind of the present invention
In the embodiment being more highly preferred to, in order to further improve the obtained cycle performance of lithium iron phosphate dynamic battery at low temperature,
On the basis of the gross weight of negative material, the content of the negative active core-shell material is 94-97 weight %, the content of conductive agent is
0.4~1.6 weight %, the content of binding agent are 2.5~5 weight %.
According to the present invention, the conductive agent can be type commonly used in the art, for example, the conductive agent can select
At least two from CNT, acetylene black, conductive black, graphite agent KS.
According to the present invention, the binding agent can be type commonly used in the art, for example, the binding agent can select
From polyvinyl alcohol, polytetrafluoroethylene (PTFE), carboxymethyl cellulose, TPO binding agent, butadiene-styrene rubber and Viton etc., preferably feelings
Under condition, the binding agent is carboxymethyl cellulose.
According to the present invention, in order to further optimize the discharging efficiency of lithium battery, under preferable case, the cathode of lithium battery
Compacted density is 1.35~1.86g/cm3, more preferably 1.5~1.7g/cm3。
According to the present invention, in order to further optimize the discharging efficiency of lithium battery, under preferable case, the cathode of lithium battery
Surface density is 63~82g/cm2, more preferably 67~80g/cm2。
The present invention also provides a kind of preparation method of lithium battery, comprises the following steps：
(1) preparation of positive pole；
(2) preparation of negative pole；
(3) electrolyte is injected after being molded positive pole, negative pole and membrane winding, inert gas is then filled with into lithium battery,
Be 0.3~3MPa to pressure, then by lithium battery at 20~35 DEG C upright 6-24h, then the upright 6-24h at 40-55 DEG C, so
After be evacuated to pressure to obtain lithium battery after sealing under -0.08~-0.05MPa.
According to the present invention, in battery preparation, in the impregnation process of electrolyte, by injecting inert gas, electricity is improved
Pressure inside pond enables electrode slice to be infiltrated completely by electrolyte, so as in the charge and discharge process in later stage, improve ion and
The efficiency of transmission of electronics, improve the Energy Efficiency Ratio of lithium battery.
According to the present invention, the preparation method of the positive pole can be method commonly used in the art, such as can be：
A, under vacuum, positive electrode binder and 1-METHYLPYRROLIDONE are well mixed, obtaining mass concentration is
5%-10% positive pole closes slurry glue；
B, under vacuum, temperature be at 20-50 DEG C, positive pole is closed into slurry glue and positive conductive agent, positive-active material
Material stirring is with obtained anode sizing agent；
C, anode sizing agent be coated on plus plate current-collecting body at least one side, dry, roll, slitting, film-making, obtaining lithium battery just
Pole.
According to the present invention, the preparation method of the positive pole can be method commonly used in the art, such as can be：
A, under vacuum, positive electrode binder and 1-METHYLPYRROLIDONE are well mixed, obtaining mass concentration is
1.5%-1.8% positive pole closes slurry glue；
B, under vacuum, temperature be at 20-50 DEG C, positive pole is closed into slurry glue and positive conductive agent, positive-active material
Material stirring is with obtained anode sizing agent；
C, anode sizing agent be coated on plus plate current-collecting body at least one side, dry, roll, slitting, film-making, obtaining lithium battery just
Pole.
According to the preparation method of lithium battery provided by the invention, the coiling and molding technique, electrolyte injection technology and envelope
Filling moulding process can be with known to those skilled in the art, and the present invention will not be repeated here.
The present invention will be described in detail by way of examples below, and conductive black is close purchased from Switzerland spy in following examples
Height, model SP；
Electrically conductive graphite is purchased from Switzerland Te Migao, model KS6；
1-METHYLPYRROLIDONE (NMP) is purchased from Nanjing Jin Long Chemical Co., Ltd.s；
Carbon coating type LiFePO 4 material reaches new energy Co., Ltd, model HSD-1 purchased from Hai Si；
Delanium is purchased from Shenzhen Bei Terui new energy materialses limited company, model S360；
Graphitization alkene layer aluminium foil, graphitization alkene layer copper foil are grand purchased from Dongguan Hua Zhiwei；
PVDF is in harmony (Shanghai) International Trading Company Ltd purchased from friend, model 5130；
Carboxymethyl cellulose (cmc) is purchased from Hercules chemical industry (Jiangmen) Co., Ltd, model BVH8；、
LiPF6, vinylene carbonate, propylene sulfite, ethylene sulfite, glycol dimethyl ether, ethylene carbonate
(EC), methyl ethyl carbonate (EMC), dimethyl carbonate (DMC) are purchased from Guangzhou Tianci Advanced Materials Co., Ltd；
Embodiment 1
(1) prepared by positive pole
1.6kg PVDF are dissolved in 21kg NMP, obtain the PVDF glues that mass concentration is 7%；By 96.8kg carbon bags
Covering LiFePO4, (volume average particle size distribution D50 is 10 μm, tap density 1.2g/cm3, specific surface area 15m2/ g), 1kg leads
Electro-graphitic, 0.6kg graphenes stir with above-mentioned PVDF glues under conditions of 40 DEG C of vacuum≤- 0.08MPa to be made
Anode sizing agent；
Anode sizing agent is coated on into the graphitization alkene layer aluminium foil tow sides that thickness is 20 μm, and (graphene layer is 2 μm+thickness
Aluminium foil for 16 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The positive pole of 2350mm × 180mm × 20 μm, it is 161g/m to obtain surface density2, compacted density 2.3g/cm3Positive pole.
(2) prepared by negative pole
3kg CMC are dissolved in 173kg deionized waters, obtain the CMC glues that mass concentration is 1.7%；By 95kg people
Make graphite (tap density 1.02g/cm3, specific surface area 3.2m2/ g), 0.5kg electrically conductive graphites, 0.5kg CNTs with it is above-mentioned
CMC glues are stirred under conditions of 20 DEG C of vacuum≤- 0.08MPa so that cathode size is made；
Cathode size is coated on into the graphitization alkene layer copper foil tow sides that thickness is 13 μm, and (graphene layer is 2 μm+thickness
Copper foil for 9 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The negative pole of 2480mm × 184mm × 13 μm, it is 75g/m to obtain surface density2, compacted density 1.55g/m3。
(3) by LiPF6With ethylene sulfite, glycol dimethyl ether, ethylene carbonate (EC), methyl ethyl carbonate (EMC)
LiPF is configured to dimethyl carbonate (DMC)6(wherein, EC, EMC and DMC weight ratio are 1 to the solution that concentration is 1.3mol/L：
1：1), on the basis of the gross weight of electrolyte, wherein the content of propylene sulfite is the gross weight 2% of electrolyte, ethylene glycol
The content of dimethyl ether propylene sulfite is the gross weight 2% of electrolyte.
The negative pole that positive pole that (1) is obtained, membrane layer polyethylene (PE), (2) obtain is wound into up- coiler stacking successively
The electrode group of scroll, it is fitted into a manner of 4 battery cores are in parallel in the square aluminum hull that length is respectively 115mm, 36mm, 220mm,
Again by aluminum hull cover plate and aluminum hull laser welding, electrolyte is injected, inert gas is then filled with into lithium battery, is to pressure
1.5MPa, by lithium battery at 25 DEG C upright 12h, then the upright 12h at 45 DEG C, it is -0.06MPa to be then evacuated to pressure,
Lithium battery A1 is obtained after sealing, its chemical property is as shown in table 1.
Embodiment 2
(1) prepared by positive pole
1.5kg PVDF are dissolved in 28.5kgNMP, obtain the PVDF glues that mass concentration is 5%；By 96.5kg carbon
(volume average particle size distribution D50 is 12 μm, tap density 1g/cm to coated LiFePO 4 for lithium ion batteries3, specific surface area 10m2/ g), 1kg leads
Electro-graphitic, 1kg graphenes stir with above-mentioned PVDF glues under conditions of 40 DEG C of vacuum≤- 0.08MPa to be made just
Pole slurry；
Anode sizing agent is coated on into the graphitization alkene layer aluminium foil tow sides that thickness is 18 μm, and (graphene layer is 2 μm+thickness
Aluminium foil for 14 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The positive pole of 5300mm × 74mm × 20 μm, it is 155g/m to obtain surface density2, compacted density 2.4g/cm3Positive pole.
(2) prepared by negative pole
2.5kg CMC are dissolved in 165kg deionized waters, obtain the CMC glues that mass concentration is 1.5%；Will
95.9kg Delaniums (tap density 0.93g/cm3, specific surface area 2.8m2/ g), 0.8kg electrically conductive graphites, 0.8kg carbon nanometers
Pipe stirs with above-mentioned CMC glues under conditions of 20 DEG C of vacuum≤- 0.08MPa so that cathode size is made；
Cathode size is coated on into the graphitization alkene layer copper foil tow sides that thickness is 12 μm, and (graphene layer is 2 μm+thickness
Copper foil for 8 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The negative pole of 5500mm × 78mm × 13 μm, it is 67g/m to obtain surface density2, compacted density 1.7g/m3。
(3) by LiPF6With ethylene sulfite, glycol dimethyl ether, ethylene carbonate (EC), methyl ethyl carbonate (EMC)
LiPF is configured to dimethyl carbonate (DMC)6(wherein, EC, EMC and DMC weight ratio are 1 to the solution that concentration is 1.3mol/L：
1：1), on the basis of the gross weight of electrolyte, wherein the content of propylene sulfite is gross weight 0.5%, the second two of electrolyte
The content of diethylene glycol dimethyl ether propylene sulfite is the gross weight 0.5% of electrolyte.
The negative pole that positive pole that (1) is obtained, membrane layer polyethylene (PE), (2) obtain is wound into up- coiler stacking successively
The electrode group of scroll, it is fitted into a manner of 2 battery cores are in parallel in the square aluminum hull that length is respectively 148mm, 26mm, 91mm,
Again by aluminum hull cover plate and aluminum hull laser welding, electrolyte is injected, inert gas is then filled with into lithium battery, is to pressure
3MPa, by lithium battery at 20 DEG C upright 24h, then the upright 6h at 55 DEG C, it is -0.05MPa to be then evacuated to pressure, sealing
After obtain lithium battery A2, its chemical property is as shown in table 1.
Embodiment 3
(1) prepared by positive pole
2.5kg PVDF are dissolved in 22.5kg NMP, obtain the PVDF glues that mass concentration is 10%；By 96.5kg
(volume average particle size distribution D50 is 8 μm, tap density 01.3g/cm to carbon-coated LiFePO 4 for lithium ion batteries3, specific surface area 18m2/g)、
0.5kg electrically conductive graphites, 0.5kg graphenes and above-mentioned PVDF glues stir under conditions of 40 DEG C of vacuum≤- 0.08MPa
So that anode sizing agent is made；
Anode sizing agent is coated on into the graphitization alkene layer aluminium foil tow sides that thickness is 24 μm, and (graphene layer is 2 μm+thickness
Aluminium foil for 20 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The positive pole of 3320mm × 180mm × 20 μm, it is 156g/m to obtain surface density2, compacted density 2.2g/cm3Positive pole.
(2) prepared by negative pole
5kg CMC are dissolved in 273kg deionized waters, obtain the CMC glues that mass concentration is 1.8%；By 94.6kg
Delanium (tap density 1.15g/cm3, specific surface area 4.3m2/ g), 0.2kg electrically conductive graphites, 0.2kg CNTs with it is upper
CMC glues are stated to stir under conditions of 20 DEG C of vacuum≤- 0.08MPa so that cathode size is made；
Cathode size is coated on into the graphitization alkene layer copper foil tow sides that thickness is 12 μm, and (graphene layer is 2 μm+thickness
Copper foil for 8 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The negative pole of 3400mm × 184mm × 13 μm, it is 80g/m to obtain surface density2, compacted density 1.5g/m3。
(3) by LiPF6With ethylene sulfite, glycol dimethyl ether, ethylene carbonate (EC), methyl ethyl carbonate (EMC)
LiPF is configured to dimethyl carbonate (DMC)6(wherein, EC, EMC and DMC weight ratio are 1 to the solution that concentration is 1mol/L：1：
1), on the basis of the gross weight of electrolyte, wherein the content of propylene sulfite is the gross weight 3% of electrolyte, ethylene glycol two
The content of methyl ether propylene sulfite is the gross weight 3% of electrolyte.
The negative pole that positive pole that (1) is obtained, membrane layer polyethylene (PE), (2) obtain is wound into up- coiler stacking successively
The electrode group of scroll, it is fitted into a manner of 2 battery cores are in parallel in the square aluminum hull that length is respectively 148mm, 53mm, 200mm,
Again by aluminum hull cover plate and aluminum hull laser welding, electrolyte is injected, inert gas is then filled with into lithium battery, is to pressure
0.3MPa, by lithium battery at 35 DEG C upright 6h, then the upright 24h at 40 DEG C, it is -0.08MPa to be then evacuated to pressure, close
It is honored as a queen to obtain lithium battery A3, its chemical property is as shown in table 1.
Embodiment 4
According to the method for embodiment 1, the difference is that, the preparation method of the positive pole is as follows：
1kg PVDF are dissolved in 12kg NMP, obtain the PVDF glues that mass concentration is 7.5%；By 97.7kg carbon bags
Covering LiFePO4, (volume average particle size distribution D50 is 7 μm, tap density 0.8g/cm3, specific surface area 22m2/ g), 0.5kg second
Acetylene black, 0.8kg graphenes stir with above-mentioned PVDF glues under conditions of 40 DEG C of vacuum≤- 0.08MPa to be made just
Pole slurry；
Anode sizing agent is coated on into the graphitization alkene layer aluminium foil tow sides that thickness is 18 μm, and (graphene layer is 1 μm+thickness
Aluminium foil for 16 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The positive pole of 2350mm × 180mm × 20 μm, it is 150g/m to obtain surface density2, compacted density 2g/cm3Positive pole, obtain lithium electricity
Pond A4, its chemical property are as shown in table 1.
Embodiment 5
According to the method for embodiment 1, the difference is that, the preparation method of the positive pole is as follows：
3.5kg PVDF are dissolved in 31.5kg NMP, obtain the PVDF glues that mass concentration is 10%；By 94kg carbon
(volume average particle size distribution D50 is 15 μm, tap density 1.5g/cm to coated LiFePO 4 for lithium ion batteries3, specific surface area 22m2/g)、1kg
Electrically conductive graphite, 1.5kg graphenes stir with above-mentioned PVDF glues under conditions of 40 DEG C of vacuum≤- 0.08MPa to make
Obtain anode sizing agent；
Anode sizing agent is coated on into the graphitization alkene layer copper foil tow sides that thickness is 20 μm, and (graphene layer is 3 μm+thickness
Aluminium foil for 14 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The positive pole of 2350mm × 180mm × 20 μm, it is 168g/m to obtain surface density2, compacted density 2.6g/cm3Positive pole, obtain lithium
Battery A5, its chemical property are as shown in table 1.
Embodiment 6
According to the method for embodiment 1, the difference is that, the preparation method of the negative pole is as follows：
2.5kg CMC are dissolved in 156kg deionized waters, obtain the CMC glues that mass concentration is 1.6%；By 97kg
Delanium (tap density 0.8g/cm3, specific surface area 5m2/ g), 0.2kg electrically conductive graphites, 0.3kg CNTs with it is above-mentioned
CMC glues are stirred under conditions of 20 DEG C of vacuum≤- 0.08MPa so that cathode size is made；
Cathode size is coated on into the graphitization alkene layer copper foil tow sides that thickness is 11 μm, and (graphene layer is 2 μm+thickness
Copper foil for 7 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The negative pole of 2480mm × 184mm × 13 μm, it is 82g/m to obtain surface density2, compacted density 1.86g/m3, lithium battery A6 is obtained,
Its chemical property is as shown in table 1.
Embodiment 7
According to the method for embodiment 1, the difference is that, the preparation method of the negative pole is as follows：
5kg CMC are dissolved in 273kg deionized waters, obtain the CMC glues that mass concentration is 1.8%；By 94kg people
Make graphite (tap density 1.2g/cm3, specific surface area 2m2/ g), 0.5kg electrically conductive graphites, 0.5kg CNTs and above-mentioned CMC
Glue is stirred under conditions of 20 DEG C of vacuum≤- 0.08MPa so that cathode size is made；
Cathode size is coated on into the graphitization alkene layer copper foil tow sides that thickness is 13 μm, and (graphene layer is 1 μm+thickness
Copper foil for 11 μm), then 120 DEG C of drying, cutting obtains size and is on cutting machine after roll-in under 1.6MPa pressure
The negative pole of 2480mm × 184mm × 13 μm, it is 63g/m to obtain surface density2, compacted density 1.35g/m3, lithium battery A7 is obtained,
Its chemical property is as shown in table 1.
Embodiment 8
According to the method for embodiment 1, the difference is that, the collocation method of the electrolysis is as follows：By LiPF6With sulfurous acid propylene
Ester, glycol dimethyl ether, ethylene carbonate (EC), methyl ethyl carbonate (EMC) and dimethyl carbonate (DMC) are configured to LiPF6It is dense
(wherein, EC, EMC and DMC weight ratio are 1 to the solution for spending for 1.3mol/L：0.8：0.8), using the gross weight of electrolyte as base
The content of standard, wherein propylene sulfite is gross weight 1.5%, the content of glycol dimethyl ether propylene sulfite of electrolyte
For the gross weight 2% of electrolyte, lithium battery A8 is obtained, its chemical property is as shown in table 1.
Embodiment 9
According to the method for embodiment 1, the difference is that, the collocation method of the electrolysis is as follows：(3) by LiPF6It is sub- with carbonic acid
Vinyl acetate, propylene sulfite, glycol dimethyl ether, ethylene carbonate (EC), methyl ethyl carbonate (EMC) and dimethyl carbonate
(DMC) it is configured to LiPF6(wherein, EC, EMC and DMC weight ratio are 1 to the solution that concentration is 1.3mol/L：1.2：1.2), with
On the basis of the gross weight of electrolyte, wherein the content of vinylene carbonate is the gross weight 1% of electrolyte, vinylene carbonate
The gross weight 2% that content is the gross weight 1% of electrolyte, the content of glycol dimethyl ether propylene sulfite is electrolyte, is obtained
It is as shown in table 1 to lithium battery A9, its chemical property.
Comparative example 1
According to the method for embodiment 1, the difference is that, the plus plate current-collecting body is the aluminium foil that thickness is 16 μm, obtains lithium electricity
Pond B1, its chemical property are as shown in table 1.
Comparative example 2
According to the method for embodiment 1, the difference is that, the negative current collector is the copper foil that thickness is 9 μm, obtains lithium battery
B2, its chemical property are as shown in table 1.
Comparative example 3
According to the method for embodiment 1, the difference is that, propylene sulfite is not contained in the electrolyte, obtains lithium battery
B3, its chemical property are as shown in table 1.
Comparative example 4
According to the method for embodiment 1, the difference is that, glycol dimethyl ether sulfurous acid propylene is not contained in the electrolyte
Ester, lithium battery B4 is obtained, its chemical property is as shown in table 1.
Comparative example 5
According to the method for embodiment 1, the difference is that, in the impregnation process of electrolyte, do not injected to lithium battery interior lazy
Property gas, obtains lithium battery B5, its chemical property is as shown in table 1.
Method of testing：
1st, each lithium battery in embodiment 1~9 and comparative example 1~4 is filled at 25 DEG C, in a manner of constant-current constant-voltage charging
Electricity, limitation electric current are 0.05C, voltage range 2.8-3.55V, circulate 10000 times, calculate the 1st discharge capacity C, energy respectively
Capability retention R after imitating ratio and circulating 10000 times.
2nd, each lithium battery in embodiment 1~9 and comparative example 1~4 is filled at -20 DEG C, in a manner of constant-current constant-voltage charging
Electricity, limitation electric current are 0.05C, voltage range 2.0-3.55V, calculate initial discharge capacity ratio (%) C1.
3rd, 55 DEG C, with constant voltage charging method to embodiment 1~9 and comparative example 1~4 in each lithium battery charge, limit
Electric current processed is 0.5C, voltage range 2.8-3.55V, is circulated 10000 times, calculates initial discharge capacity ratio (%) C2.
Inner walkway method：After cell charging is full, with accuracy ± 0.1%, voltage is not less than 0.5 grade with electric current,
Frequency is that 1.0kHz ± 0.1kHz AC internal Resistance tester directly measures.
The computational methods of Energy Efficiency Ratio：The same discharge energy (Wh) circulated in the range of assigned voltage of battery and regulation electricity
The ratio of rechargeable energy (Wh) in the range of pressure.
Tested according to GR/T 31484-2015 and calculate the capability retention of lithium battery.
Tested according to GR/T 31484-2015 and calculate the initial discharge capacity of lithium battery.
Table 1：The performance table of each lithium battery in embodiment 1~9 and comparative example 1~4
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.It is further to note that described in above-mentioned embodiment
Each particular technique feature, in the case of reconcilable, can be combined by any suitable means, in order to avoid not
Necessary repetition, the present invention no longer separately illustrate to various combinations of possible ways.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of lithium battery, including positive pole, negative pole, barrier film and electrolyte, it is characterised in that the positive pole includes plus plate current-collecting body
With coated in the positive electrode on the plus plate current-collecting body, wherein, the plus plate current-collecting body is graphitization alkene layer aluminium foil；
The negative pole includes negative current collector and coated in the negative material on the negative current collector, wherein, the negative pole collection
Fluid is graphitization alkene layer copper foil.
2. lithium battery according to claim 1, wherein, the graphitization alkene layer aluminium foil includes aluminium foil and coated in aluminium foil table
The first graphite ene coatings in face, the wherein thickness of aluminium foil are 14-20 μm；The thickness of the first graphite ene coatings is 1-3 μm；
And/or
The graphitization alkene layer copper foil includes copper foil and the second graphite ene coatings coated in copper foil surface, the thickness of the copper foil
For 7-11 μm；The thickness of the second graphite ene coatings is 1-3 μm.
3. lithium battery according to claim 1, wherein, the electrolyte includes ethylene carbonate, methyl ethyl carbonate and carbon
Dimethyl phthalate, and the volume ratio of the ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate is 1:(0.8~1.2)：(0.8~
1.2)。
4. lithium battery according to claim 3, wherein, coalescents and/or ethylene glycol two are also contained in the electrolyte
Methyl ether；
The coalescents are selected from least one of vinylene carbonate, propylene sulfite and ethylene sulfite.
5. lithium battery according to claim 4, wherein, on the basis of the gross weight of the electrolyte, the coalescents
Content be 0.5~3 weight %；And/or
The content of the glycol dimethyl ether is 0.5~3 weight %.
6. lithium battery according to claim 1, wherein, the positive electrode includes positive electrode active materials, conductive agent, bonding
Agent, the positive electrode active materials include carbon-coated LiFePO 4 for lithium ion batteries, the volume average particle size distribution D50 of the carbon-coated LiFePO 4 for lithium ion batteries
For 7~15 μm, 0.8~1.5g/cm of tap density3, specific surface area be 7~22m2/g。
7. lithium battery according to claim 6, wherein, on the basis of the gross weight of positive electrode, the positive-active material
The content of material is 94-97.7 weight %, the content of conductive agent is 0.8~3 weight %, the content of binding agent is 1.0~3.5 weights
Measure %；And/or
The conductive agent is selected from acetylene black, conductive black, graphite are dilute and CNT at least two；And/or
The binding agent is polyvinylidene fluoride.
8. lithium battery according to claim 1, wherein, the negative material includes negative electrode active material, conductive agent and glued
Tie agent；The negative electrode active material includes Delanium, and the tap density of the Delanium is 0.8~1.2g/cm3, compare table
2~5m of area2/g。
9. lithium battery according to claim 8, wherein, on the basis of the gross weight of lithium cell cathode material, the negative pole
The content of active material is 94-97 weight %, the content of conductive agent is 0.4~1.6 weight %, the content of binding agent is 2.5~5
Weight %；And/or
The conductive agent in CNT, acetylene black, conductive black, graphite agent KS at least two；And/or
The binding agent is carboxymethyl cellulose.
10. the preparation method of lithium battery as claimed in any of claims 1 to 9, it is characterised in that including following step
Suddenly：
(1) preparation of positive pole；
(2) preparation of negative pole；
(3) electrolyte is injected after being molded positive pole, negative pole and membrane winding, inert gas is then filled with into lithium battery, to pressure
Strong is 0.3~3MPa, then by lithium battery at 20~35 DEG C upright 6-24h, then the upright 6-24h at 40-55 DEG C, then take out
Vacuum to pressure is to obtain lithium battery after being sealed under -0.08~-0.05MPa.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108428867A (en) * | 2018-03-09 | 2018-08-21 | 深圳市溢骏科技有限公司 | Fast charging type lithium ion battery and preparation method thereof |
| CN109148988A (en) * | 2018-08-28 | 2019-01-04 | 孙战 | A kind of lithium-ion battery electrolytes rapid osmotic method |
| CN109509909A (en) * | 2018-10-17 | 2019-03-22 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN110247013A (en) * | 2018-03-08 | 2019-09-17 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device containing same |
| CN110265627A (en) * | 2018-09-28 | 2019-09-20 | 宁德时代新能源科技股份有限公司 | Positive electrode plate and lithium ion secondary battery |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872381A (en) * | 2012-12-17 | 2014-06-18 | 北汽福田汽车股份有限公司 | Liquid-injection standing method for power cell |
| CN105449223A (en) * | 2015-11-18 | 2016-03-30 | 青岛领军节能与新材料研究院 | Manufacturing method for high-safety and high-capacity lithium ion battery |
| CN105529429A (en) * | 2015-11-10 | 2016-04-27 | 河北银隆新能源有限公司 | Liquid filling method for cylindrical lithium-ion battery |
| CN105845942A (en) * | 2016-06-20 | 2016-08-10 | 山东建筑大学 | Preparation method of nano graphene copper foil |
| US20170125816A1 (en) * | 2015-10-30 | 2017-05-04 | Nissan North America, Inc. | Three dimensional electrode having electron directing members and method of making the same |
| CN106784853A (en) * | 2016-09-27 | 2017-05-31 | 彭成信 | Graphene coating aluminum foil current collector and preparation method thereof |
| US9692056B1 (en) * | 2012-04-13 | 2017-06-27 | Amprius, Inc. | Dual current collectors for battery electrodes |
-
2017
- 2017-10-13 CN CN201710954806.8A patent/CN107768733B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9692056B1 (en) * | 2012-04-13 | 2017-06-27 | Amprius, Inc. | Dual current collectors for battery electrodes |
| CN103872381A (en) * | 2012-12-17 | 2014-06-18 | 北汽福田汽车股份有限公司 | Liquid-injection standing method for power cell |
| US20170125816A1 (en) * | 2015-10-30 | 2017-05-04 | Nissan North America, Inc. | Three dimensional electrode having electron directing members and method of making the same |
| CN105529429A (en) * | 2015-11-10 | 2016-04-27 | 河北银隆新能源有限公司 | Liquid filling method for cylindrical lithium-ion battery |
| CN105449223A (en) * | 2015-11-18 | 2016-03-30 | 青岛领军节能与新材料研究院 | Manufacturing method for high-safety and high-capacity lithium ion battery |
| CN105845942A (en) * | 2016-06-20 | 2016-08-10 | 山东建筑大学 | Preparation method of nano graphene copper foil |
| CN106784853A (en) * | 2016-09-27 | 2017-05-31 | 彭成信 | Graphene coating aluminum foil current collector and preparation method thereof |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247013B (en) * | 2018-03-08 | 2022-06-03 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device containing same |
| CN110247013A (en) * | 2018-03-08 | 2019-09-17 | 宁德时代新能源科技股份有限公司 | Positive pole piece and electrochemical device containing same |
| CN108428867B (en) * | 2018-03-09 | 2019-08-16 | 深圳市溢骏科技有限公司 | Fast charging type lithium ion battery and preparation method thereof |
| CN108428867A (en) * | 2018-03-09 | 2018-08-21 | 深圳市溢骏科技有限公司 | Fast charging type lithium ion battery and preparation method thereof |
| CN109148988A (en) * | 2018-08-28 | 2019-01-04 | 孙战 | A kind of lithium-ion battery electrolytes rapid osmotic method |
| CN110265627B (en) * | 2018-09-28 | 2020-09-29 | 宁德时代新能源科技股份有限公司 | Positive electrode plate and lithium ion secondary battery |
| CN110265627A (en) * | 2018-09-28 | 2019-09-20 | 宁德时代新能源科技股份有限公司 | Positive electrode plate and lithium ion secondary battery |
| US11196041B2 (en) | 2018-09-28 | 2021-12-07 | Contemporary Amperex Technology Co., Limited | Positive electrode plate and lithium-ion secondary battery |
| CN109509909B (en) * | 2018-10-17 | 2020-07-03 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN109509909A (en) * | 2018-10-17 | 2019-03-22 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN111403799A (en) * | 2020-03-09 | 2020-07-10 | 广西华政新能源科技有限公司 | Special-shaped lithium battery and vehicle-mounted kettle |
| CN111403799B (en) * | 2020-03-09 | 2022-03-18 | 广西华政新能源科技有限公司 | Special-shaped lithium battery and vehicle-mounted kettle |
| CN112952030A (en) * | 2020-03-27 | 2021-06-11 | 宁德新能源科技有限公司 | Positive pole piece, electrochemical device comprising positive pole piece and electronic device |
| CN114188507A (en) * | 2021-10-29 | 2022-03-15 | 中国石油大学(北京) | Negative pole piece, preparation method thereof and lithium ion battery |
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