CN104241696A - Lithium ion battery with high energy density and preparation method of lithium ion battery with high energy density - Google Patents

Lithium ion battery with high energy density and preparation method of lithium ion battery with high energy density Download PDF

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Publication number
CN104241696A
CN104241696A CN201410469954.7A CN201410469954A CN104241696A CN 104241696 A CN104241696 A CN 104241696A CN 201410469954 A CN201410469954 A CN 201410469954A CN 104241696 A CN104241696 A CN 104241696A
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layer
active material
lithium ion
ion battery
material layer
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Inventor
邓耀明
汪国红
李东剑
杜天柱
李中延
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Mcnair Technology Co Ltd
Dongguan Mcnair New Power Co Ltd
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Mcnair Technology Co Ltd
Dongguan Mcnair New Power Co Ltd
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Priority to CN201410469954.7A priority Critical patent/CN104241696A/en
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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
    • 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
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • 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
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • 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
    • H01M4/665—Composites
    • H01M4/667—Composites in the form of layers, e.g. coatings
    • 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
    • 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 invention relates to the technical field of lithium ion batteries and in particular relates to a lithium ion battery with the high energy density and a preparation method of the lithium ion battery with the high energy density. The lithium ion battery comprises a positive electrode, a negative electrode, an isolation film and electrolyte, wherein the positive electrode comprises a positive current collector, an active material A layer and an active material B layer; the active material A layer is arranged between the positive current collector and the active material B layer; the particle diameter of an active material B is greater than that of an active material A; the weight ratio of the active material A layer to the active material B layer is 0.1-10; the negative electrode comprises a negative current collector, a conductive polymer C layer and a negative film; the conductive polymer C layer is arranged between the negative current collector and the negative film; the thickness of the conductive polymer C layer is less than or equal to 5 microns. The lithium ion battery prepared by adopting the method is relatively high in dynamics performance; the problem of risk of separating lithium out of a thickly-coated system lithium ion battery at the low temperature can be effectively solved. The prepared battery is safe, reliable, and long in cycle life.

Description

Lithium ion battery of a kind of high-energy-density and preparation method thereof
Technical field
The present invention relates to technical field of lithium ion, particularly relate to lithium ion battery of a kind of high-energy-density and preparation method thereof.
Background technology
Lithium ion battery is since commercialization, and because its energy density is high, operating voltage is high, memory-less effect, has extended cycle life, power supply that the plurality of advantages such as environmentally safe is widely used as various mobile device, also makes it enter the large-scale practical stage.
Along with social progress, numerous portable equipment is all to intellectuality, and multifunction strides forward, and in order to meet it to capacity and power requirement, ensures the utility time of its abundance, requires that its power source must have energy density higher.So far, the main Application and Development from high Energy Density Materials of energy density lifting and operation lifting are to the excavation of the confined space and application, but lithium ion battery electrochemical system that up till now can be practical is substantially fixing, constrains the further lifting of its energy density.On the other hand, in the making of lithium electric machining, compared with the application of thin membrane and collector close to technical bottleneck, short-term is difficult to break through.
In order to improve energy density, some development persons attempt promoting coated surface density, but due to after surface density increasing, lithium ion the evolving path obviously increases, and resistance to mass tranfer strengthens, and is difficult to meet application demand.For this reason, the above problems demand solves.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, and a kind of lithium ion battery of the high-energy-density used under thick coating system is provided.
Another object of the present invention is to for the deficiencies in the prior art, and a kind of preparation method of lithium ion battery of high-energy-density is provided.
The present invention is achieved through the following technical solutions.
A kind of lithium ion battery of high-energy-density, comprise positive pole, negative pole, barrier film and electrolyte, barrier film is interval between positive pole and negative pole, described positive pole comprises plus plate current-collecting body, active material layer A layer and active material layer B layer, active material layer A layer is arranged between plus plate current-collecting body and active material layer B layer, active material layer A layer comprises active material A, active material layer B layer comprises active material B, the particle diameter of active material B is greater than the particle diameter of active material A, and the weight ratio of active material layer A layer and active material layer B layer is 0.1-10; Negative pole comprises negative current collector, polymeric, conductive layer C layer and negative electrode film, and polymeric, conductive layer C layer is arranged between negative current collector and negative electrode film, thickness≤5 μm of polymeric, conductive layer C layer.Find in research, in thick coating system design, the transmission difficulty of solid phase, granule active material is arranged at internal layer effectively can shorten the transmission distance of lithium ion in solid phase, reduces system polarization.
Wherein, described active material layer A layer is made up of the raw material of following percentage by weight:
Active material A 95.0-99.0%
Conductive carbon 0.5-2.0%
PVDF 0.5-3.0%；
Described active material layer B layer is made up of the raw material of following percentage by weight:
Active material B 95.0-99.0%
Conductive carbon 0.5-2.0%
PVDF 0.5-3.0%。
Wherein, D50≤12 μm of described active material A, active material is LiCoO 2, Li 2niO 2, LiMnO 4, LiFePO 4, Li 4ti 5o 12, LiNi xco ymn (1-x-y)o 2, LiNi 0.8co 0.15al 0.05o 2in any one or a few mixture.The particle diameter of active material A is greater than 12 μm, easily causes active material layer A layer to polarize excessive, lithium ion in pole piece is longitudinal on deintercalation uneven.
Wherein, D50>=12 μm of described active material B, active material is LiCoO 2, Li 2niO 2, LiMnO 4, LiFePO 4, Li 4ti 5o 12, LiNi xco ymn (1-x-y)o 2, LiNi 0.8co 0.15al 0.05o 2in any one or a few mixture.The particle diameter of active material B is less than 12 μm, easily cause active material layer B pull-up excessively embedding, so that active material configuration caves in.
Wherein, the weight ratio of described active material layer A layer and active material layer B layer is preferably 0.2-2, and active material A can be identical or different with active material.
Wherein, thickness≤2 μm of polymeric, conductive layer C layer, weight≤0.2mg/cm 2, preferred weight≤0.1mg/cm 2, the blocked up meeting of coating thickness causes battery self-energy density contribution unit volume rate to reduce and then affects energy density and plays, and the increase of coated film density excessive conductive carbon quality can cause too much reactivity point and then affect gram volume and play.
Wherein, described polymeric, conductive layer C layer is made up of the raw material of following percentage by weight:
Thickener 0.5-5.0%
Conductive agent 20.0-85%
Binding agent 10-79.5 %;
Conductive agent is any one or a few the mixture in conductive carbon, Graphene, carbon nano-tube, vapor-grown carbon fibers;
Thickener is sodium carboxymethylcellulose;
Binding agent is butadiene-styrene latex.
Wherein, described negative electrode film is made up of the raw material of following percentage by weight:
Negative electrode active material 95.0-99.0%
Thickener 0.5-2.0%
Conductive carbon 0-1.0%
Binding agent 0.5-3.0%;
Gram volume >=the 350mAh/g of negative electrode active material; Negative electrode active material is that the surface adopting one deck agraphitic carbon to be coated on graphite granule forms, the thickness≤100nm of agraphitic carbon;
Thickener is sodium carboxymethylcellulose;
Binding agent is butadiene-styrene rubber.The present invention adopts that agraphitic carbon is coated can to the modifying surface of graphite and modification, the defect reducing surface suppresses the reduction of electrolyte and consumes to reduce irreversible capacity, and improve the long cycle life characteristics of battery, and its thickness is no more than 100nm, blocked up meeting causes reversible serious polarization, and gram volume plays low.
Wherein, the preparation method of described positive pole is: first active material A, conductive carbon, PVDF and solvent are stirred and form active material layer A layer slurry, then active material layer A layer slurry is coated on the surface of plus plate current-collecting body, forms active material layer A layer, dry, as first starting sheet; Then active material B, conductive carbon, PVDF and solvent are stirred and form active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, then with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
Wherein, the preparation method of described negative pole is: first conductive agent, binding agent, thickener and solvent are stirred and form conducting polymer slurry, then conducting polymer slurry is coated on equably the surface of negative current collector, the obtained negative current collector containing polymeric, conductive layer C layer is as first starting sheet; Then negative electrode active material, binding agent, conductive carbon, thickener and solvent are stirred and form cathode size, then cathode size is coated on the surface of polymeric, conductive layer C layer, then with roll squeezer by pole piece compacting, obtained cathode pole piece.
Beneficial effect of the present invention is:
One, Low ESR.Under thick coating system; because the transmission path of lithium ion increases; battery impedance direct proportion increases; optimizing the size particulate active is in the distribution of pole piece cross section; allow granule active material and active material A near plus plate current-collecting body, bulky grain active material and active material B are arranged at the outer surface layer of pole piece, contribute to shortening the transmission distance of lithium ion in solid phase; reduce system polarization from source, promote dynamic performance.
Two, better bond effect.For anode pole piece, in pole piece, mainly there is the cementation of binding agent and collector, binding agent and active material or and cohesive force effect between the active force of conductive carbon and binding agent itself.Find in research, in this three's active force, the cementation of binding agent and collector is the faintest, and therefore powder comes off from collector is modal a kind of failure mode.The present invention is preliminary treatment one layer of polymeric conductive layer C layer on conventional collector, the bonding interface of binding agent is made to be converted into the effect of binding agent and polymeric, conductive layer C layer, binding agent on the one hand in pole piece is similar system to the binding agent of polymeric, conductive layer, slurry can better soak with extravagant, and interfacial adhesion is stronger.On the other hand, it is more coarse that polymeric, conductive layer C layer compares collection liquid surface, and mechanical snap effect strengthens, and is conducive to the bonding improving active layer and bottom.Moreover cohesive force can reduce the content of binding agent in formula after improving further, promote the content of active material, promote energy density.
Three, more superior cycle performance.The present invention adopts agraphitic carbon to the modifying surface of graphite and modification, and the defect that can reduce surface suppresses the reduction of electrolyte and consumes to reduce irreversible capacity, and improves the long cycle life characteristics of battery.
Four, the negative pole using the present invention to prepare has less impedance, better dynamic performance, and effectively can solve the risk problem that lithium ion battery low temperature analyses lithium, the battery of preparation has feature that is safe and reliable, that have extended cycle life.
Preparation method of the present invention is simple, and production efficiency is high, is conducive to popularity application.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
embodiment 1.
The preparation method of the lithium ion battery of the high-energy-density of the present embodiment, it comprises following preparation process:
1), the preparation of polymeric, conductive layer:
Siccative weight percent meter pressed by conducting polymer slurry, the sodium carboxymethylcellulose (CMC-Na) by 3%, the butadiene-styrene latex (SBR) of 40%, 57% conductive carbon black form, solvent is water, and water accounts for 85% of total slurry.First by filling a prescription water, sodium carboxymethylcellulose above, join in mixer grinder, dissolve completely under vacuum conditions, by formula, conductive carbon black is added in the aqueous high molecular solution having and dissolved, it is less than 5 μm that rapid stirring is ground to fineness, finally adds butadiene-styrene latex by formula again, vacuum low rate mixing is evenly (for preventing butadiene-styrene latex breakdown of emulsion, can not rapid stirring), with 300 order stainless steel sift net filtrations, i.e. obtained required conducting polymer slurry;
Using the thick Copper Foil of 8um as negative current collector, adopt micro-gravure coater to be uniformly coated on the thick Copper Foil of 8um by above-mentioned conducting polymer slurry, control thickness is 1um, film density 0.05mg/cm 2, after double spread conducting polymer slurry, the obtained first starting sheet containing polymeric, conductive layer C layer.
), the preparation of negative pole:
Negative pole uses the Delanium of coated agraphitic carbon as negative electrode active material, use deionized water as the solvent of cathode size, by the negative electrode active material of 97%, 1.5% sodium carboxymethylcellulose, 0.5% conductive carbon and 1.0% butadiene-styrene rubber mix and blend formed cathode size, the solids content of cathode size is 45%; Cathode size is coated equably the two sides of the Copper Foil handled well in step 1), then with roll squeezer by pole piece compacting, obtained cathode pole piece.
), the preparation of positive pole:
Positive pole uses D50 to be the cobalt acid lithium (LiCoO of 11 μm respectively 2) and D50 be the cobalt acid lithium (LiCoO of 18 μm 2) as active material A and active material B;
Using NMP as solvent, first by the cobalt of 97% 11 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer A layer slurry, the solids content of active material layer A layer slurry is 70%, using the aluminium foil of 12 μm as plus plate current-collecting body, then active material layer A layer slurry is coated on the surface of the aluminium foil of 12 μm, form active material layer A layer, dry, as first starting sheet; Then by the cobalt of 98% 18 μm acid lithium, the conductive carbon of 1.0%, the PVDF(Kynoar of 1.0%) mix and blend formation active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, the coating weight ratio of active material layer B layer and active material layer A layer is 3/2, and the total weight of one side coating is 25mg/cm 2; Again with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
), the assembling of battery:
Welding conduction lug on anode pole piece and cathode pole piece, make to accompany in the middle of positive pole and negative pole the PP/PE/PP composite isolated film of 14um and overlapping, be wound into cubic shape, then use in laminated aluminum film bag, inject nonaqueous electrolytic solution, the electrolyte of battery is the LiPF of 1mol/L 6solution, primary solvent is mixed by EC, PC, DMC, changes into and burn-in test after encapsulation to battery, obtains the thick square flexible-packed battery for 32mm × 82mm × 42mm of length and width.
embodiment 2.
The preparation method of the lithium ion battery of the high-energy-density of the present embodiment, it comprises following preparation process:
1), the preparation of polymeric, conductive layer:
Siccative weight percent meter pressed by conducting polymer slurry, the sodium carboxymethylcellulose (CMC-Na) by 0.5%, the butadiene-styrene latex (SBR) of 40%, 59.5% conductive carbon black form, solvent is water, and water accounts for 85% of total slurry.First by filling a prescription water, sodium carboxymethylcellulose above, join in mixer grinder, dissolve completely under vacuum conditions, by formula, conductive carbon black is added in the aqueous high molecular solution having and dissolved, it is less than 5 μm that rapid stirring is ground to fineness, finally adds butadiene-styrene latex by formula again, vacuum low rate mixing is evenly (for preventing butadiene-styrene latex breakdown of emulsion, can not rapid stirring), with 300 order stainless steel sift net filtrations, i.e. obtained required conducting polymer slurry;
Using the thick Copper Foil of 8um as negative current collector, adopt micro-gravure coater to be uniformly coated on the thick Copper Foil of 8um by above-mentioned conducting polymer slurry, control thickness is 5um, film density 0.2mg/cm 2, after double spread conducting polymer slurry, the obtained first starting sheet containing polymeric, conductive layer C layer.
), the preparation of negative pole:
Negative pole uses the Delanium of coated agraphitic carbon as negative electrode active material, use deionized water as the solvent of cathode size, by the negative electrode active material of 99%, the sodium carboxymethylcellulose of 0.5% and 0.5% butadiene-styrene rubber do mix and blend formed cathode size, the solids content of cathode size is 45%; Cathode size is coated equably the two sides of the Copper Foil handled well in step 1), then with roll squeezer by pole piece compacting, obtained cathode pole piece.
), the preparation of positive pole:
Positive pole uses D50 to be the cobalt acid lithium (LiCoO of 9 μm respectively 2) and D50 be the cobalt acid lithium (LiCoO of 16 μm 2) as active material A and active material B;
Using NMP as solvent, first by the cobalt of 95% 9 μm acid lithium, the conductive carbon of 2%, the PVDF(Kynoar of 3%) mix and blend formation active material layer A layer slurry, the solids content of active material layer A layer slurry is 70%, using the aluminium foil of 12 μm as plus plate current-collecting body, then active material layer A layer slurry is coated on the surface of the aluminium foil of 12 μm, form active material layer A layer, dry, as first starting sheet; Then by the cobalt of 97% 16 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, the coating weight ratio of active material layer B layer and active material layer A layer is 1/1, and the total weight of one side coating is 25mg/cm 2; Again with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
), the assembling of battery:
Welding conduction lug on anode pole piece and cathode pole piece, make to accompany in the middle of positive pole and negative pole the PP/PE/PP composite isolated film of 14um and overlapping, be wound into cubic shape, then use in laminated aluminum film bag, inject nonaqueous electrolytic solution, the electrolyte of battery is the LiPF of 1mol/L 6solution, primary solvent is mixed by EC, PC, DMC, changes into and burn-in test after encapsulation to battery, obtains the thick square flexible-packed battery for 32mm × 82mm × 42mm of length and width.
embodiment 3.
The preparation method of the lithium ion battery of the high-energy-density of the present embodiment, it comprises following preparation process:
1), the preparation of polymeric, conductive layer:
Siccative weight percent meter pressed by conducting polymer slurry, the sodium carboxymethylcellulose (CMC-Na) by 1%, the butadiene-styrene latex (SBR) of 35%, 64% conductive carbon black form, solvent is water, and water accounts for 85% of total slurry.First by filling a prescription water, sodium carboxymethylcellulose above, join in mixer grinder, dissolve completely under vacuum conditions, by formula, conductive carbon black is added in the aqueous high molecular solution having and dissolved, it is less than 5 μm that rapid stirring is ground to fineness, finally adds butadiene-styrene latex by formula again, vacuum low rate mixing is evenly (for preventing butadiene-styrene latex breakdown of emulsion, can not rapid stirring), with 300 order stainless steel sift net filtrations, i.e. obtained required conducting polymer slurry;
Using the thick Copper Foil of 8um as negative current collector, adopt micro-gravure coater to be uniformly coated on the thick Copper Foil of 8um by above-mentioned conducting polymer slurry, control thickness is 2um, film density 0.1mg/cm 2, after double spread conducting polymer slurry, the obtained first starting sheet containing polymeric, conductive layer C layer.
), the preparation of negative pole:
Negative pole uses the Delanium of coated agraphitic carbon as negative electrode active material, use deionized water as the solvent of cathode size, by the negative electrode active material of 95%, 2.0% sodium carboxymethylcellulose, 1.0% conductive carbon and 2.0% butadiene-styrene rubber do mix and blend formed cathode size, the solids content of cathode size is 45%; Cathode size is coated equably the two sides of the Copper Foil handled well in step 1), then with roll squeezer by pole piece compacting, obtained cathode pole piece.
), the preparation of positive pole:
Positive pole uses D50 to be the cobalt acid lithium (LiCoO of 9 μm respectively 2) and D50 be the cobalt acid lithium (LiCoO of 16 μm 2) as active material A and active material B;
Using NMP as solvent, first by the cobalt of 97% 9 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer A layer slurry, the solids content of active material layer A layer slurry is 70%, using the aluminium foil of 12 μm as plus plate current-collecting body, then active material layer A layer slurry is coated on the surface of the aluminium foil of 12 μm, form active material layer A layer, dry, as first starting sheet; Then by the cobalt of 97% 16 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, the coating weight ratio of active material layer B layer and active material layer A layer is 1/1, and the total weight of one side coating is 25mg/cm 2; Again with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
), the assembling of battery:
Welding conduction lug on anode pole piece and cathode pole piece, make to accompany in the middle of positive pole and negative pole the PP/PE/PP composite isolated film of 14um and overlapping, be wound into cubic shape, then use in laminated aluminum film bag, inject nonaqueous electrolytic solution, the electrolyte of battery is the LiPF of 1mol/L 6solution, primary solvent is mixed by EC, PC, DMC, changes into and burn-in test after encapsulation to battery, obtains the thick square flexible-packed battery for 32mm × 82mm × 42mm of length and width.
embodiment 4.
The preparation method of the lithium ion battery of the high-energy-density of the present embodiment, it comprises following preparation process:
1), the preparation of polymeric, conductive layer:
Siccative weight percent meter pressed by conducting polymer slurry, the sodium carboxymethylcellulose (CMC-Na) by 1%, the butadiene-styrene latex (SBR) of 35%, 64% conductive carbon black form, solvent is water, and water accounts for 85% of total slurry.First by filling a prescription water, sodium carboxymethylcellulose above, join in mixer grinder, dissolve completely under vacuum conditions, by formula, conductive carbon black is added in the aqueous high molecular solution having and dissolved, it is less than 5 μm that rapid stirring is ground to fineness, finally adds butadiene-styrene latex by formula again, vacuum low rate mixing is evenly (for preventing butadiene-styrene latex breakdown of emulsion, can not rapid stirring), with 300 order stainless steel sift net filtrations, i.e. obtained required conducting polymer slurry;
Using the thick Copper Foil of 8um as negative current collector, adopt micro-gravure coater to be uniformly coated on the thick Copper Foil of 8um by above-mentioned conducting polymer slurry, control thickness is 1um, film density 0.05mg/cm 2, after double spread conducting polymer slurry, the obtained first starting sheet containing polymeric, conductive layer C layer.
), the preparation of negative pole:
Negative pole uses the Delanium of coated agraphitic carbon as negative electrode active material, use deionized water as the solvent of cathode size, by the negative electrode active material of 98%, the sodium carboxymethylcellulose of 1.0% and 1.0% butadiene-styrene rubber do mix and blend formed cathode size, the solids content of cathode size is 45%; Cathode size is coated equably the two sides of the Copper Foil handled well in step 1), then with roll squeezer by pole piece compacting, obtained cathode pole piece.
), the preparation of positive pole:
Positive pole uses D50 to be the cobalt acid lithium (LiCoO of 5 μm respectively 2) and D50 be the cobalt acid lithium (LiCoO of 16 μm 2) as active material A and active material B;
Using NMP as solvent, first by the cobalt of 99% 5 μm acid lithium, the conductive carbon of 0.5%, the PVDF(Kynoar of 0.5%) mix and blend formation active material layer A layer slurry, the solids content of active material layer A layer slurry is 70%, using the aluminium foil of 16 μm as plus plate current-collecting body, then active material layer A layer slurry is coated on the surface of the aluminium foil of 16 μm, form active material layer A layer, dry, as first starting sheet; Then by the cobalt of 97% 16 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, the coating weight ratio of active material layer B layer and active material layer A layer is 2/3, and the total weight of one side coating is 25mg/cm 2; Again with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
), the assembling of battery:
Welding conduction lug on anode pole piece and cathode pole piece, make to accompany in the middle of positive pole and negative pole the PP/PE/PP composite isolated film of 14um and overlapping, be wound into cubic shape, then use in laminated aluminum film bag, inject nonaqueous electrolytic solution, the electrolyte of battery is the LiPF of 1mol/L 6solution, primary solvent is mixed by EC, PC, DMC, changes into and burn-in test after encapsulation to battery, obtains the thick square flexible-packed battery for 32mm × 82mm × 42mm of length and width.
embodiment 5.
The preparation method of the lithium ion battery of the high-energy-density of the present embodiment, it comprises following preparation process:
1), the preparation of polymeric, conductive layer:
Siccative weight percent meter pressed by conducting polymer slurry, the sodium carboxymethylcellulose (CMC-Na) by 1%, the butadiene-styrene latex (SBR) of 35%, 64% conductive carbon black form, solvent is water, and water accounts for 85% of total slurry.First by filling a prescription water, sodium carboxymethylcellulose above, join in mixer grinder, dissolve completely under vacuum conditions, by formula, conductive carbon black is added in the aqueous high molecular solution having and dissolved, it is less than 5 μm that rapid stirring is ground to fineness, finally adds butadiene-styrene latex by formula again, vacuum low rate mixing is evenly (for preventing butadiene-styrene latex breakdown of emulsion, can not rapid stirring), with 300 order stainless steel sift net filtrations, i.e. obtained required conducting polymer slurry;
Using the thick Copper Foil of 8um as negative current collector, adopt micro-gravure coater to be uniformly coated on the thick Copper Foil of 8um by above-mentioned conducting polymer slurry, control thickness is 1um, film density 0.05mg/cm 2, after double spread conducting polymer slurry, the obtained first starting sheet containing polymeric, conductive layer C layer.
), the preparation of negative pole:
Negative pole uses the Delanium of coated agraphitic carbon as negative electrode active material, use deionized water as the solvent of cathode size, by the negative electrode active material of 98%, the sodium carboxymethylcellulose of 1.0% and 1.0% butadiene-styrene rubber do mix and blend formed cathode size, the solids content of cathode size is 45%; Cathode size is coated equably the two sides of the Copper Foil handled well in step 1), then with roll squeezer by pole piece compacting, obtained cathode pole piece.
), the preparation of positive pole:
Positive pole uses D50 to be the cobalt acid lithium (LiCoO of 10 μm respectively 2) and D50 be the cobalt acid lithium (LiCoO of 18 μm 2) as active material A and active material B;
Using NMP as solvent, first by the cobalt of 95% 10 μm acid lithium, the conductive carbon of 2%, the PVDF(Kynoar of 3%) mix and blend formation active material layer A layer slurry, the solids content of active material layer A layer slurry is 70%, using the aluminium foil of 18 μm as plus plate current-collecting body, then active material layer A layer slurry is coated on the surface of the aluminium foil of 18 μm, form active material layer A layer, dry, as first starting sheet; Then by the cobalt of 99% 18 μm acid lithium, the conductive carbon of 0.5%, the PVDF(Kynoar of 0.5%) mix and blend formation active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, the coating weight ratio of active material layer B layer and active material layer A layer is 2/3, and the total weight of one side coating is 25mg/cm 2; Again with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
), the assembling of battery:
Welding conduction lug on anode pole piece and cathode pole piece, make to accompany in the middle of positive pole and negative pole the PP/PE/PP composite isolated film of 14um and overlapping, be wound into cubic shape, then use in laminated aluminum film bag, inject nonaqueous electrolytic solution, the electrolyte of battery is the LiPF of 1mol/L 6solution, primary solvent is mixed by EC, PC, DMC, changes into and burn-in test after encapsulation to battery, obtains the thick square flexible-packed battery for 32mm × 82mm × 42mm of length and width.
comparative example 1.
The preparation method of the lithium ion battery of the high-energy-density of the present embodiment, it comprises following preparation process:
1), the preparation of negative pole:
Negative pole uses coated Delanium as negative electrode active material, use deionized water as the solvent of cathode size, by the negative electrode active material of 98%, the sodium carboxymethylcellulose of 1.0% and 1.0% butadiene-styrene rubber do mix and blend formed cathode size, the solids content of cathode size is 45%; The two sides of the Copper Foil that cathode size is coated equably, then with roll squeezer by pole piece compacting, obtained cathode pole piece.
), the preparation of positive pole:
Positive pole uses D50 to be the cobalt acid lithium (LiCoO of 5 μm respectively 2) and D50 be the cobalt acid lithium (LiCoO of 16 μm 2) as active material A and active material B;
Using NMP as solvent, first by the cobalt of 97% 5 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer A layer slurry, the solids content of active material layer A layer slurry is 70%, using the aluminium foil of 16 μm as plus plate current-collecting body, then active material layer A layer slurry is coated on the surface of the aluminium foil of 16 μm, form active material layer A layer, dry, as first starting sheet; Then by the cobalt of 97% 16 μm acid lithium, the conductive carbon of 1.5%, the PVDF(Kynoar of 1.5%) mix and blend formation active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, the coating weight ratio of active material layer B layer and active material layer A layer is 2/3, and the total weight of one side coating is 25mg/cm 2; Again with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
), the assembling of battery:
Welding conduction lug on anode pole piece and cathode pole piece, make to accompany in the middle of positive pole and negative pole the PP/PE/PP composite isolated film of 14um and overlapping, be wound into cubic shape, then use in laminated aluminum film bag, inject nonaqueous electrolytic solution, the electrolyte of battery is the LiPF of 1mol/L 6solution, primary solvent is mixed by EC, PC, DMC, changes into and burn-in test after encapsulation to battery, obtains the thick square flexible-packed battery for 32mm × 82mm × 42mm of length and width.
The performance test of the lithium ion battery of the high-energy-density that embodiments of the invention 1 ~ embodiment 5 is obtained is as follows:
For contrasting the battery performance of each embodiment and comparative example, get each embodiment battery, battery completely fills by 0.5C multiplying power at normal temperatures, and constant voltage, to 0.05C, is tested 0.2C, 0.5C, 1.0C, 1.5C, 2.0C discharge capacity respectively and be the results are shown in following table 1.
Table 1 normal temperature discharge-rate performance
Discharge capacity 0.2C 0.5C 1C 1.5C 2C
Embodiment 1 100.0% 99.0% 97.0% 95.0% 89.0%
Embodiment 2 100.0% 98.7% 97.0% 94.8% 91.0%
Embodiment 3 100.0% 98.5% 96.5% 94.2% 90.0%
Embodiment 4 100.0% 98.9% 97.2% 95.6% 92.0%
Embodiment 5 100.0% 98.8% 96.8% 94.6% 90.0%
Comparative example 1 100.0% 96.5% 88.7% 67.2% 45.1%
high/low temperature volume test:
Completely filled by battery at normal temperatures, respectively test battery is the discharge capacity of 25 DEG C, 0 DEG C ,-20 DEG C, 60 DEG C.Before discharge test, battery leaves standstill 2h under assigned temperature, the results are shown in Table 2.
Table 2 high/low temperature discharge performance
Discharge capacity -20℃ -15℃ -10℃ 25℃ 60℃
Embodiment 1 48.0% 70.0% 82.0% 100.0% 101.0%
Embodiment 2 53.0% 72.0% 83.0% 100.0% 100.5%
Embodiment 3 49.0% 71.0% 82.0% 100.0% 100.2%
Embodiment 4 55.0% 73.0% 84.0% 100.0% 100.5%
Embodiment 5 49.0% 70.0% 83.0% 100.0% 100.4%
Comparative example 1 8.0% 35.3% 62.5% 100.0% 100.3%
Can be found out by table 1, table 2, the pole piece of the lithium ion battery of high-energy-density prepared by the present invention has high rate performance excellence, the feature that high temperature performance is good.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although done to explain to the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.

Claims (10)

1. the lithium ion battery of a high-energy-density, comprise positive pole, negative pole, barrier film and electrolyte, barrier film is interval between positive pole and negative pole, it is characterized in that: described positive pole comprises plus plate current-collecting body, active material layer A layer and active material layer B layer, active material layer A layer is arranged between plus plate current-collecting body and active material layer B layer, active material layer A layer comprises active material A, active material layer B layer comprises active material B, the particle diameter of active material B is greater than the particle diameter of active material A, and the weight ratio of active material layer A layer and active material layer B layer is 0.1-10; Negative pole comprises negative current collector, polymeric, conductive layer C layer and negative electrode film, and polymeric, conductive layer C layer is arranged between negative current collector and negative electrode film, thickness≤5 μm of polymeric, conductive layer C layer.
2. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: described active material layer A layer is made up of the raw material of following percentage by weight:
Active material A 95.0-99.0%
Conductive carbon 0.5-2.0%
PVDF 0.5-3.0%；
Described active material layer B layer is made up of the raw material of following percentage by weight:
Active material B 95.0-99.0%
Conductive carbon 0.5-2.0%
PVDF 0.5-3.0%。
3. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: D50≤12 μm of described active material A, and active material is LiCoO 2, Li 2niO 2, LiMnO 4, LiFePO 4, Li 4ti 5o 12, LiNi xco ymn (1-x-y)o 2, LiNi 0.8co 0.15al 0.05o 2in any one or a few mixture.
4. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: D50>=12 μm of described active material B, and active material is LiCoO 2, Li 2niO 2, LiMnO 4, LiFePO 4, Li 4ti 5o 12, LiNi xco ymn (1-x-y)o 2, LiNi 0.8co 0.15al 0.05o 2in any one or a few mixture.
5. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: the weight ratio of described active material layer A layer and active material layer B layer is 0.2-2.
6. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: thickness≤2 μm of described polymeric, conductive layer C layer, weight≤0.2mg/cm 2.
7. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: described polymeric, conductive layer C layer is made up of the raw material of following percentage by weight:
Thickener 0.5-5.0%
Conductive agent 20.0-85%
Binding agent 10-79.5 %;
Wherein, conductive agent is any one or a few the mixture in conductive carbon, Graphene, carbon nano-tube, vapor-grown carbon fibers;
Thickener is sodium carboxymethylcellulose;
Binding agent is butadiene-styrene latex.
8. the lithium ion battery of a kind of high-energy-density according to claim 1, is characterized in that: described negative electrode film is made up of the raw material of following percentage by weight:
Negative electrode active material 95.0-99.0%
Thickener 0.5-2.0%
Conductive carbon 0-1.0%
Binding agent 0.5-2.0%;
Gram volume >=the 350mAh/g of negative electrode active material; Negative electrode active material is that the surface adopting one deck agraphitic carbon to be coated on graphite granule forms, the thickness≤100nm of agraphitic carbon;
Thickener is sodium carboxymethylcellulose;
Binding agent is butadiene-styrene rubber.
9. the preparation method of the lithium ion battery of a kind of high-energy-density described in claim 1-8 any one, it is characterized in that: the preparation method of described positive pole is: first active material A, conductive carbon, PVDF and solvent are stirred and form active material layer A layer slurry, then active material layer A layer slurry is coated on the surface of plus plate current-collecting body, form active material layer A layer, dry, as first starting sheet; Then active material B, conductive carbon, PVDF and solvent are stirred and form active material layer B layer slurry, then active material layer B layer slurry is coated on the surface of active material layer A layer, form active material layer B layer, then with roll squeezer by pole piece compacting, obtained oiliness anode pole piece.
10. the lithium ion battery of a kind of high-energy-density described in claim 1-8 any one, the preparation method that it is characterized in that: the preparation method of described negative pole is: first conductive agent, binding agent, thickener and solvent are stirred and form conducting polymer slurry, then conducting polymer slurry is coated on equably the surface of negative current collector, the obtained negative current collector containing polymeric, conductive layer C layer is as first starting sheet; Then negative electrode active material, binding agent, conductive carbon, thickener and solvent are stirred and form cathode size, then cathode size is coated on the surface of polymeric, conductive layer C layer, then with roll squeezer by pole piece compacting, obtained cathode pole piece.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552297A (en) * 2015-12-18 2016-05-04 力神动力电池***有限公司 Lithium ion battery with high safety
CN106328988A (en) * 2016-10-19 2017-01-11 广东天劲新能源科技股份有限公司 Single battery, preparation method thereof and production method of kettle type battery pack
CN108963198A (en) * 2017-05-22 2018-12-07 动力专家有限公司 Anode, cathode, preparation method and the lithium ion battery including it
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CN109698376A (en) * 2018-12-04 2019-04-30 天臣新能源研究南京有限公司 A kind of fast charging type lithium ion battery with high energy density
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CN111916663A (en) * 2020-07-27 2020-11-10 珠海冠宇电池股份有限公司 Positive pole piece and lithium ion battery comprising same
CN112201788A (en) * 2020-09-23 2021-01-08 深圳大学 Lithium ion battery negative plate with high-capacity negative electrode bonding system and battery
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CN113140693A (en) * 2021-04-19 2021-07-20 珠海冠宇电池股份有限公司 Negative plate, battery core and battery
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008023875A (en) * 2006-07-21 2008-02-07 Mitsubishi Paper Mills Ltd Side gauge apparatus for sheet-fed printer
CN101859893A (en) * 2010-05-27 2010-10-13 深圳市德兴富电池材料有限公司 Preparation method of lithium ion battery anode material
CN102742050A (en) * 2010-09-30 2012-10-17 株式会社Lg化学 Positive electrode for lithium secondary battery and lithium secondary battery including same
CN102768901A (en) * 2012-08-06 2012-11-07 张宝生 Long-life capacitance battery
CN202633452U (en) * 2012-04-06 2012-12-26 东莞新能源科技有限公司 Lithium ion battery structure
CN103160224A (en) * 2011-12-15 2013-06-19 埃纳德尔公司 Coating of disordered carbon active material using water-based binder slurry
CN103199254A (en) * 2013-04-03 2013-07-10 深圳市贝特瑞新能源材料股份有限公司 Graphite negative material of lithium-ion battery and preparation method of negative material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008023875A (en) * 2006-07-21 2008-02-07 Mitsubishi Paper Mills Ltd Side gauge apparatus for sheet-fed printer
CN101859893A (en) * 2010-05-27 2010-10-13 深圳市德兴富电池材料有限公司 Preparation method of lithium ion battery anode material
CN102742050A (en) * 2010-09-30 2012-10-17 株式会社Lg化学 Positive electrode for lithium secondary battery and lithium secondary battery including same
CN103160224A (en) * 2011-12-15 2013-06-19 埃纳德尔公司 Coating of disordered carbon active material using water-based binder slurry
CN202633452U (en) * 2012-04-06 2012-12-26 东莞新能源科技有限公司 Lithium ion battery structure
CN102768901A (en) * 2012-08-06 2012-11-07 张宝生 Long-life capacitance battery
CN103199254A (en) * 2013-04-03 2013-07-10 深圳市贝特瑞新能源材料股份有限公司 Graphite negative material of lithium-ion battery and preparation method of negative material

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105552297B (en) * 2015-12-18 2017-12-22 力神动力电池***有限公司 A kind of lithium ion battery with high security
CN105552297A (en) * 2015-12-18 2016-05-04 力神动力电池***有限公司 Lithium ion battery with high safety
CN106328988A (en) * 2016-10-19 2017-01-11 广东天劲新能源科技股份有限公司 Single battery, preparation method thereof and production method of kettle type battery pack
CN108963198A (en) * 2017-05-22 2018-12-07 动力专家有限公司 Anode, cathode, preparation method and the lithium ion battery including it
CN109309192A (en) * 2017-07-28 2019-02-05 宁德时代新能源科技股份有限公司 Electrode slice and electrochemical energy storage device
CN109037587A (en) * 2018-08-07 2018-12-18 桑德集团有限公司 A kind of electrode and preparation method thereof
CN109037587B (en) * 2018-08-07 2020-11-17 桑顿新能源科技有限公司 Electrode and preparation method thereof
CN109698376A (en) * 2018-12-04 2019-04-30 天臣新能源研究南京有限公司 A kind of fast charging type lithium ion battery with high energy density
CN111900343B (en) * 2020-06-18 2022-05-13 珠海冠宇电池股份有限公司 Positive pole piece and preparation method and application thereof
CN111900343A (en) * 2020-06-18 2020-11-06 珠海冠宇电池股份有限公司 Positive pole piece and preparation method and application thereof
CN111916663A (en) * 2020-07-27 2020-11-10 珠海冠宇电池股份有限公司 Positive pole piece and lithium ion battery comprising same
CN112201788A (en) * 2020-09-23 2021-01-08 深圳大学 Lithium ion battery negative plate with high-capacity negative electrode bonding system and battery
CN112420983A (en) * 2020-11-26 2021-02-26 珠海冠宇电池股份有限公司 Positive plate and lithium ion battery
CN113140693A (en) * 2021-04-19 2021-07-20 珠海冠宇电池股份有限公司 Negative plate, battery core and battery
CN115513461A (en) * 2022-09-30 2022-12-23 厦门海辰储能科技股份有限公司 Negative electrode slurry, preparation method, negative electrode sheet, battery pack and electric equipment
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