CN102683740B - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
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- CN102683740B CN102683740B CN201210158278.2A CN201210158278A CN102683740B CN 102683740 B CN102683740 B CN 102683740B CN 201210158278 A CN201210158278 A CN 201210158278A CN 102683740 B CN102683740 B CN 102683740B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/431—Inorganic material
- H01M50/434—Ceramics
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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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
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
- H01M4/808—Foamed, spongy materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
- H01M50/461—Separators, membranes or diaphragms characterised by their combination with electrodes with adhesive layers between electrodes and 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
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/42—Acrylic resins
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/426—Fluorocarbon polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/429—Natural polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
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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
Abstract
The invention relates to a lithium ion battery, which comprises an anode layer, a cathode layer and a membrane, wherein the membrane is used for connecting the anode layer with the cathode layer; the anode layer comprises an anode current collector and an anode electrode material; the cathode layer comprises a cathode current collector and a cathode electrode material; the membrane comprises a non-woven fabric and a nanometer ceramic material coated on the surface of the non-woven fabric; the anode current collector and the cathode current collector have three-dimensional netlike structures which are provided with multi-permeation holes and can be used for conducting electricity; and the anode electrode material and the cathode electrode material are filled into the multi-permeation holes of the anode current collector and the cathode current collector respectively. The current collectors are combined with the electrode materials in three-dimensional netlike forms through a multi-permeation hole bracket, so that the utilization ratios of the electrode materials can be increased, active substances in unit area are increased, high electrode surface density and corresponding high energy density are achieved, the quantity of pole pieces of the battery and the using quantity of the membrane can be reduced greatly, the cost of the membrane accounts for over 25 percent of the battery cost, and the manufacturing cost of the entire battery is reduced.
Description
Technical field
The present invention relates to battery technology field, particularly relate to a kind of lithium ion battery.
Background technology
Traditional lithium ion battery, it comprises at least one group of anodal layer and negative electrode layer, between described anodal layer and negative electrode layer, connects by barrier film.The manufacture craft of the electrode composite material of positive and negative electrode layer is wherein: electrode material is coated on tinsel and the acquisition that is shaped by adhesive.The shortcoming of this technique is: (1), owing to using more adhesive in coating processes, causes partial electrode material not make full use of, and cannot obtain the electrode composite material of high areal density; (2) adhesion between electrode active material and collector is relatively poor, easily produces electrode peeling phenomenon, causes its Mechanical Reliability to reduce, and makes the rate of curving of electrode composite material be restricted simultaneously.Be embodied in accordingly in the performance of battery product, can cause the capacitance of battery product to reduce, internal resistance increases, shorten useful life, processing technology complexity and cost increase, and has limited the extensive use of lithium battery.
Conventionally, positive/negative electrode active material is by metal forming if stainless steel, aluminium, copper etc. are as collector, and in cyclic process, electrode material, along with embedding and the deintercalation of lithium ion, exists the Swelling and contraction of volume, as SiO
2change in volume up to 400%, consequent mechanical stress gradually changes electrode material in cyclic process, the cracking that causes electrode and collector with peel off, between active material, electrically contact forfeiture, internal resistance increases, and shows poor charge-discharge performance.And for fear of this technical problem, it is relatively thin that traditional electrode composite material need to be made, make the surface density of electrode material less.
But, follow-up battery is assembled in processing in order to obtain corresponding capacity and energy density, need to adopt thicker coating and a large amount of multi-disc laminated, in the time that coating layer thickness is larger, the poor processability of electrode, being accumulated in performance of this multilayer also can cause the internal resistance of cell to increase and the decline of stable circulation performance accordingly.The mutual restriction of conventional art different phase technological requirement, has caused the parameter such as internal resistance, life-span and energy density and capacity of the battery in conventional art cannot obtain the improvement of essence.In addition, the mechanical performance that conventional art is directly coated on the combination electrode material in current collector foil is also restricted.Owing to making electrode active material occur the phenomenon that fractures compared with the existence of thick coating, cause itself and collector to be separated from each other.Even if thinner electrode composite material in employing conventional art also cannot be realized less curvature and change in actual processing and manufacturing process.Therefore the structure of battery product and profile are also restricted, particularly for curled battery.
Summary of the invention
Based on this, be necessary to provide a kind of electrode material utilization higher, and obtain higher electrode surface density and high-energy-density and cheaply lithium ion battery accordingly.
A kind of lithium ion battery, it comprises: the barrier film of the described anodal layer of anodal layer, negative electrode layer and connection and negative electrode layer, wherein said anodal layer comprises plus plate current-collecting body and positive electrode material, described negative electrode layer comprises negative current collector and negative electrode material; Wherein, described barrier film comprises nonwoven fabrics and is coated in the nano ceramic material of nonwoven surface; Wherein, described plus plate current-collecting body and negative current collector be have many seepage holes can conductivity space network, described positive electrode material and negative electrode material are filled in respectively in many seepage holes of plus plate current-collecting body and negative current collector.
Therein in an embodiment, many seepage holes metal foam that the porosity that described plus plate current-collecting body and negative current collector are many seepage holes is 20%～95%.
In an embodiment, the material of described many seepage holes metal foam is aluminium, copper, nickel, silver, gold or stainless steel therein.
In an embodiment, described positive electrode material is LiFePO therein
4, described negative electrode material is carbon or Li
4ti
5o
12.
In an embodiment, on described anodal layer, be coated with porousness ionic conductive polymer glue therein.
In an embodiment, on described negative electrode layer, be also coated with porousness ionic conductive polymer glue therein.
In an embodiment, what described anodal layer, barrier film and negative electrode layer formed is also coated with same porousness ionic conductive polymer glue on the whole therein.
In an embodiment, described porousness ionic conductive polymer glue is polyvinylidene fluoride, polytetrafluoroethylene therein, polyoxyethylene, polymethyl acrylate or taking acrylate as basic gum polymers.
In an embodiment, the viscosity of described porous polymer glue is 0.1PaS～10PaS therein.
In an embodiment, described anodal layer and negative electrode layer are the laminated structure of consistency of thickness therein.
In above-mentioned lithium ion battery, anodal layer and negative pole series of strata are by many seepage holes skeleton and the electrode material of collector are realized solid netted combination separately, therefore can improve the utilance of electrode material, and obtain higher electrode surface density and high-energy-density and cheaply battery accordingly; In addition, barrier film adopts nonwoven fabrics coating nano ceramic material, and the cost of raw material is low, and possesses good thermal stability and mechanical feature, has improved the security performance of lithium ion battery.
Brief description of the drawings
Fig. 1 is the structural representation of the lithium ion battery of present embodiment.
Embodiment
Please refer to accompanying drawing 1, the lithium ion battery 100 of present embodiment comprises anodal layer 110, negative electrode layer 120, between described anodal layer 110 and negative electrode layer 120, connect by barrier film 130, wherein anodal layer 110 comprises plus plate current-collecting body and positive electrode material, and described negative electrode layer comprises negative current collector and negative electrode material.
Plus plate current-collecting body and negative current collector be have many seepage holes can conductivity space network, positive electrode material and negative electrode material are filled in respectively in many seepage holes of plus plate current-collecting body and negative current collector.Have many seepage holes can conductivity space network be generally many seepage holes metal foam that the porosity of many seepage holes is 20%～95%, as aluminium, copper, nickel, silver, gold or their alloy, or the material such as stainless steel.Anodal and negative pole currect collecting system realizes solid netted combination by its many seepage holes skeleton and anodal and negative electrode material, thus can improve the utilance of electrode material, and obtain higher specific energy density and the lithium ion battery of capacity.Positive electrode material is LiFePO
4, negative electrode material is carbon or Li
4ti
5o
12.
Barrier film 130 comprises nonwoven fabrics and is coated in the nano ceramic material of nonwoven surface.Utilize nano ceramic material good thermal stability and mechanical feature, improved the security performance of lithium ion battery, the marketization of the nanoscale of nano ceramic material simultaneously, cost is also low.
The electrode composite material of the lithium ion battery of present embodiment is made the sheet of even thickness conventionally, and its thickness is 100 microns～100 centimetres, to facilitate follow-up metering, installation and the further manufacture to dissimilar battery.
On the surface of anodal layer 110 and negative electrode layer 120, be all coated with porousness ionic conductive polymer glue 140, make electrode when for the manufacture of battery, not only can and other electrodes between form and contact without interface, to reduce battery impedance; Porousness ionic conductive polymer glue-line can prevent again the free medium effusion collector in the electrode material in collector simultaneously.In addition, anodal layer 110, barrier film 130 and negative electrode layer 120 are also coated with porousness ionic conductive polymer glue after combining on the whole, prevent that the free medium in electrode material from overflowing.
Porousness ionic conductive polymer glue is selected from polyvinylidene fluoride, polytetrafluoroethylene, polyoxyethylene, polymethyl acrylate or taking acrylate as basic gum polymers and be mixed with lithium salts as LiPF
6, a small amount of plasticizer is as PC, the porousness ionic conductive polymer glue of EC etc., and viscosity is generally 0.1PaS～10PaS, and thickness is 0.1 micron～10 microns.
Present embodiment also provides a kind of processing technology of above-mentioned lithium ion battery 100, and its step is as follows:
Step 1: the manufacture method that porousness ionic conductive polymer glue 140 is provided: polymer dissolution is formed in corresponding solvent to the slurry with certain viscosity.
Step 2: the manufacture method that anodal layer is provided: use adhesive that the positive electrode material of the lithium ion battery that is mixed with conductive agent is made into electrode slurry.Adopt slurry-scraping method, within above-mentioned electrode slurry is packed into corresponding many seepage holes foam metal of making collector.The dry above-mentioned plus plate current-collecting body containing electrode slurry is removed its solvent in baking oven.Adopt rolling equipment compacting above-mentioned material to certain thickness.Then adopt the above-mentioned porousness ionic conductive polymer of dip coating dip-coating one deck glue thereon.It is removed in baking oven to its solvent, make to be coated with one deck porousness ionic conductive polymer glue containing on the collector of electrode material, obtain anodal layer.
Step 3: the manufacture method that negative electrode layer is provided: concrete implementing process is with step 2.
Step 4: the manufacture method that barrier film is provided: adopt electric spraying process that nano ceramic material slurry is coated on nonwoven fabrics, then dry and obtain barrier film.And at the coated one deck porousness ionic conductive polymer glue of membrane surface.
Step 5: the manufacture method that lithium ion battery is provided: above-mentioned positive and negative electrode layer and barrier film are stacked gradually by the order of accompanying drawing 1, and at a certain temperature, applying certain pressure, that three is contacted is more closely knit.
In above-mentioned processing technology, the baking temperature that contains the collector of electrode slurry is 100 DEG C～120 DEG C, and be 1～12 hour drying time.Organic bond is the adhesive for non aqueous electrolysis battery, for example polyethylene, polypropylene, polybutadiene, sodium carboxymethylcellulose, polyvinylidene fluoride, polytetrafluoroethylene, polyacrylonitrile, ethylene propylene diene rubber, butadiene-styrene rubber or polyurethane.Conductivity additive can be carbon black, acetylene black, carbon nano-tube, conductive carbon or vapor deposition carbon fiber.Be mixed with the general use 1-METHYLPYRROLIDONE of electrode material slurry of the lithium ion battery of conductive additive as solvent.
Below in conjunction with a specific embodiment, lithium ion battery 100 how to prepare present embodiment is described, its processing step is as follows:
Step 1: 7 grams of polymer poly vinylidene fluorides are joined in 180 grams of 1-METHYLPYRROLIDONEs (NMP) and make its abundant stirring and dissolving form colloidal solution.
Step 2: the production process of anodal layer operates according to the following steps: 7 grams of adhesive polyvinylidene fluoride are joined in 180 grams of 1-METHYLPYRROLIDONEs (NMP) and make its abundant stirring and dissolving form colloidal solution, by 140 grams of LiFePO
4fully be mixed to join in above-mentioned colloidal liquid with 2.8 grams of conductive carbon Super-P, stir and make the positive electrode slurry of paste with mixer.Adopt slurry-scraping method that the positive electrode slurry obtaining is filled into plus plate current-collecting body from many seepage holes foamed aluminium both sides of 90%.The above-mentioned plus plate current-collecting body containing anode electrode slurry is put into 110 DEG C of baking ovens and be incubated 4 hours except desolventizing NMP, make dry active substances in cathode materials mixture.Use Pressing device to make it finer and close dried electrode material, desired thickness is determined according to battery size, and generally its thickness, including collector, is approximately 500 microns.Containing dip-coating one deck porousness ionic conductive polymer glue on the collector of described electrode material, make to be coated with one deck porousness ionic conductive polymer glue containing on the plus plate current-collecting body of electrode material.It is incubated to 2 hours in 100 DEG C of baking ovens removes its solvent and obtain anodal layer.
Step 3: the production process of negative electrode layer operates according to the following steps: 7 grams of adhesive polyvinylidene fluoride are joined in 180 grams of 1-METHYLPYRROLIDONEs (NMP) and make its abundant stirring and dissolving form colloidal solution, by 70 grams of Li
4tiO
3fully be mixed to join in above-mentioned colloidal liquid with 1.4 grams of conductive carbon Super-P, stir and make the cathode size of paste with mixer.Adopt slurry-scraping method that the negative material slurry obtaining is filled into collector from many seepage holes foam copper both sides of 90%.The above-mentioned collector containing electrode slurry is put into 110 DEG C of baking ovens and be incubated 4 hours except desolventizing NMP, make dry negative material active material admixture.Use Pressing device to make it finer and close dried electrode material, desired thickness is determined according to battery size, and generally its thickness, including collector, is approximately 250 microns.Containing dip-coating one deck porousness ionic conductive polymer glue on the negative current collector of described electrode material, make to be coated with one deck porousness ionic conductive polymer glue containing on the negative current collector of electrode material.It is incubated to 2 hours in 100 DEG C of baking ovens and removes its solvent, obtain negative electrode layer.
Step 4: adopt electric spraying process that nano ceramic material slurry is coated on nonwoven fabrics, as nano aluminium oxide ceramic material, then dry and obtain barrier film.And be coated with one deck porousness ionic conductive polymer glue at membrane surface.
Step 5: the manufacture method that lithium ion battery is provided: above-mentioned positive and negative electrode layer and barrier film are stacked gradually by the order of accompanying drawing 1, and applying at a certain temperature certain pressure, that three is contacted is more closely knit.
The lithium ion battery of present embodiment adopts after technique scheme, mainly contains following effect:
(1) collector is realized solid netted combination by its many seepage holes skeleton and electrode material, therefore can improve the utilance of electrode material, improve the active material of unit are, thereby obtain higher electrode surface density and corresponding high-energy-density, can greatly reduce like this pole piece quantity of battery and the consumption of barrier film, and the cost of barrier film has accounted for more than 25% in battery cost, thereby reduce the manufacturing cost of whole battery.
(2) adopt extrusion process technology, the electrode layer making can be made into the sheet form of multi-thickness, there is larger battery capacity, possess good mechanical performance simultaneously, particularly resistant to bending characteristic, therefore its thickness not only can meet the requirement of thicker application scenario in prior art, improve electrode surface density, and can propose the pole piece requirement of high-capacity battery.
(3) positive and negative electrode layer is connected by porousness ionic conductive polymer glue with barrier film, for the combination of follow-up multi-layered electrode layer provides the effect of bonding connection; The more important thing is that it can form bridge between electrode layer and separator simultaneously, promote electrode material with the communication between separator and conduction, promoted greatly the reduction of the internal resistance of cell.In addition, the articulamentum of this porous can also be arranged on each surface of electrode layer, and electrode layer is sheet shape or plate shape conventionally.Obtain good protection by the electrode layer that the parcel of electrode layer can be made to be made up of said method; keep electrode material can be limited to be all the time fixed on metallic matrix; this porous articulamentum also provides a kind of effect of impermeable layer simultaneously, prevents the loss of the free medium in electrode material.
(4) barrier film adopts the way of nonwoven fabrics coating nano ceramic material, effectively utilize nano ceramic material good thermal stability and mechanical feature, improve the security performance of lithium ion battery, the marketization of the nanoscale of nano ceramic material simultaneously, cost is also low.
Therefore, present embodiment has overcome the defect of conventional art, and it has higher battery behavior and mechanical property, and cost is low, can meet battery product and can be applied to the requirement of technical field more widely.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a lithium ion battery, it is characterized in that, comprise: the barrier film of the described anodal layer of anodal layer, negative electrode layer and connection and negative electrode layer, wherein said anodal layer comprises plus plate current-collecting body and positive electrode material, described negative electrode layer comprises negative current collector and negative electrode material; Wherein, described barrier film comprises nonwoven fabrics and is coated in the nano ceramic material of nonwoven surface; Wherein, described plus plate current-collecting body and negative current collector be have many seepage holes can conductivity space network, described positive electrode material and negative electrode material are filled in respectively in many seepage holes of plus plate current-collecting body and negative current collector; On described anodal layer, be coated with porousness ionic conductive polymer glue, on described negative electrode layer, be also coated with porousness ionic conductive polymer glue, what described anodal layer, barrier film and negative electrode layer formed is also coated with porousness ionic conductive polymer glue on the whole, and the surface of described barrier film is coated one deck porousness ionic conductive polymer glue also.
2. lithium ion battery according to claim 1, is characterized in that, many seepage holes metal foam that the porosity that described plus plate current-collecting body and negative current collector are many seepage holes is 20%～95%.
3. lithium ion battery according to claim 2, is characterized in that, the material of described many seepage holes metal foam is aluminium, copper, nickel, silver, gold or stainless steel.
4. lithium ion battery according to claim 1, is characterized in that, described positive electrode material is LiFePO
4, described negative electrode material is carbon or Li
4ti
5o
12.
5. lithium ion battery according to claim 1, is characterized in that, described porousness ionic conductive polymer glue is polyvinylidene fluoride, polytetrafluoroethylene, polyoxyethylene, polymethyl acrylate or taking acrylate as basic gum polymers.
6. lithium ion battery according to claim 5, is characterized in that, the viscosity of described porous polymer glue is 0.1PaS～10PaS.
7. lithium ion battery according to claim 1, is characterized in that, described anodal layer and negative electrode layer are the laminated structure of consistency of thickness.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158278.2A CN102683740B (en) | 2012-05-21 | 2012-05-21 | Lithium ion battery |
| PCT/CN2013/000605 WO2013174149A1 (en) | 2012-05-21 | 2013-05-24 | Lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210158278.2A CN102683740B (en) | 2012-05-21 | 2012-05-21 | Lithium ion battery |
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| CN102683740A CN102683740A (en) | 2012-09-19 |
| CN102683740B true CN102683740B (en) | 2014-10-22 |
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| CN201210158278.2A Active CN102683740B (en) | 2012-05-21 | 2012-05-21 | Lithium ion battery |
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| WO (1) | WO2013174149A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683740B (en) * | 2012-05-21 | 2014-10-22 | 龙能科技（苏州）有限公司 | Lithium ion battery |
| CN108511681B (en) * | 2017-12-11 | 2024-04-09 | 吉安市优特利科技有限公司 | Electrode plate, preparation method thereof and battery |
| CN108736016B (en) * | 2018-08-01 | 2023-11-24 | 利信(江苏)能源科技有限责任公司 | Current collector and positive electrode plate and battery core prepared by using same |
| CN109037587B (en) * | 2018-08-07 | 2020-11-17 | 桑顿新能源科技有限公司 | Electrode and preparation method thereof |
| CN109346661A (en) * | 2018-10-16 | 2019-02-15 | 清华大学 | Internal short-circuit triggers battery and battery internal short-circuit triggering method |
| CN109546210B (en) * | 2018-11-14 | 2020-09-29 | 山东大学 | High-voltage all-solid-state lithium battery electrolyte and preparation method thereof |
| TWI702753B (en) * | 2019-08-21 | 2020-08-21 | 國立臺灣科技大學 | Primary battery and electrode assembly thereof |
| KR20210044507A (en) * | 2019-10-15 | 2021-04-23 | 주식회사 엘지화학 | Metal Plate with Through Hole and Porous Reinforcing Meterial and Secondary Battery Comprising Thereof |
| CN113764829A (en) * | 2021-08-30 | 2021-12-07 | 珠海冠宇电池股份有限公司 | Composite electrode sheet body and lithium battery |
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| CN101459238A (en) * | 2008-12-23 | 2009-06-17 | 大连海事大学 | Manufacturing method for high capacity composite electrode of lithium ionic cell |
| CN201845833U (en) * | 2010-05-31 | 2011-05-25 | 东莞市金赛尔电池科技有限公司 | Novel polymer lithium-ion secondary battery |
| CN102412377A (en) * | 2010-09-24 | 2012-04-11 | 比亚迪股份有限公司 | Membrane and preparation method thereof as well as lithium ion battery |
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| CN102683740A (en) | 2012-09-19 |
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