CN105958112A - Non-diaphragm lithium ion battery coiled core and preparation method therefor - Google Patents
Non-diaphragm lithium ion battery coiled core and preparation method therefor Download PDFInfo
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- CN105958112A CN105958112A CN201610467988.1A CN201610467988A CN105958112A CN 105958112 A CN105958112 A CN 105958112A CN 201610467988 A CN201610467988 A CN 201610467988A CN 105958112 A CN105958112 A CN 105958112A
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- Prior art keywords
- ion battery
- lithium ion
- positive plate
- negative plate
- coating
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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
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a non-diaphragm lithium ion battery coiled core and a preparation method therefor. The non-diaphragm lithium ion battery coiled core comprises a positive plate and a negative plate, wherein the two surfaces of at least one of the positive plate and the negative plate are coated with functional coating layers; and the functional coating layers are formed by polyvinylidene fluoride, polymethyl methacrylate and polyacrylonitrile in a mixed manner. According to the coiled core provided by the invention, the functional coating layers which coat the positive plate or the negative plate are used to replace the diaphragm, so that the short circuit caused by contact of the positive electrode and the negative electrode due to dislocation of the diaphragm is avoided, and the safety performance of the power lithium ion battery is improved; and in addition, the thickness of the functional coating layer is less than that of the diaphragm, so that the energy density of the battery is increased.
Description
Technical field
The present invention relates to a kind of lithium ion battery, be specifically related to a kind of aseptate lithium ion battery coil core and preparation method thereof.
Background technology
Lithium ion battery, as the electrochmical power source of a new generation, has been applied to the various aspects of social life, has expanded to the fields such as energy storage, electric bicycle/motorcycle, electric automobile from 3C field.Along with the continuous expansion in the field of utilization, the security incident of lithium battery the most often has generation, the security performance of lithium battery promote always be in industry pay close attention to technical problem.
Lithium ion battery is a kind of secondary cell (rechargeable battery), and it relies primarily on lithium ion and moves work between a positive electrode and a negative electrode.In charge and discharge process, Li+Come and go between two electrodes and embed and deintercalation: during charging, Li+From positive pole deintercalation, embedding negative pole through electrolyte, negative pole is in rich lithium state；During electric discharge the most contrary.Lithium ion battery coil core is usually and is made up of positive pole, negative pole, barrier film, and its septation is a kind of macromolecule membrane through specially-shaped, and thin film has microcellular structure, lithium ion can be allowed to pass freely through, and electronics can not pass through.So barrier film plays vital effect to the safety of lithium ion battery, but it still suffers from following danger at present: a kind of is that impurity in battery, burr pierce through barrier film and cause positive and negative plate directly to contact to cause short circuit；Another be battery or battery system to be in the state of thermal runaway be that membrane ruptures causes positive and negative plate bump contact, cause battery to be short-circuited, can explode under extreme case.It is thus in security consideration and thoroughly replaces the potential safety hazard that barrier film can thoroughly solve to bring due to barrier film.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of aseptate lithium ion battery coil core and preparation method thereof.
For a kind of new type power lithium ion battery, the technical solution used in the present invention is:
A kind of aseptate lithium ion battery coil core, it is made up of positive plate and negative plate, and in described positive plate, negative plate, the two-sided of at least one pole piece is coated with functional coating；Described functional coating is to be mixed by Kynoar (PVDF), polymethyl methacrylate (PMMA), polyacrylonitrile (PAN).
Scheme further, the mass ratio of described PVDF, PMMA and PAN three is 8:1:1 or 7:1.5:1.5.
Scheme further, the gross thickness of described functional coating is less than 10 microns.
Scheme further, described positive plate is the utter misery paper tinsel that dual coating has rich lithium material, and described rich lithium material is LiFePO4, NCM ternary material, LiMn2O4 or cobalt acid lithium；Described utter misery paper tinsel refers to that the dual coating of aluminium foil has nano-scale carbon nanotube (CNT) or the layer of charcoal of nanoscale graphite alkene doping.
Scheme further, described negative plate refers to have doped carbon nanometer pipe (CNT) or the graphite linings of Graphene in the dual coating of Copper Foil.
Another goal of the invention of the present invention is to provide the preparation method of above-mentioned a kind of aseptate lithium ion battery coil core, and its step is as follows:
(1) by anode sizing agent layer in the dual coating of aluminium foil, positive plate is dried to obtain；
(2) by cathode size layer in the dual coating of Copper Foil, negative plate is dried to obtain；
(3) it is coated with functional coating the two-sided of positive plate, dries to intercept positive plate；Or it is coated with functional coating the two-sided of negative plate, dry to intercept negative plate；
(4) positive plate and negative plate will be intercepted, or by positive plate and obstruct negative plate, maybe obstruct positive plate be made battery roll core with intercepting negative plate according to winding method or lamination process.
Scheme further, in described step (1), aluminium foil refers to that dual coating has the utter misery paper tinsel of rich lithium material, and described rich lithium material is LiFePO4, NCM ternary material, LiMn2O4 or cobalt acid lithium；Described utter misery paper tinsel refers to that the dual coating of aluminium foil has nano-scale carbon nanotube (CNT) or the layer of charcoal of nanoscale graphite alkene doping.
Scheme further, in described step (2), Copper Foil refers to have doped carbon nanometer pipe (CNT) or the graphite linings of Graphene in the dual coating of Copper Foil.
Further scheme, in described step (3), functional coating is to be that 8:1:1 or 7:1.5:1.5 mixes by Kynoar (PVDF), polymethyl methacrylate (PMMA), polyacrylonitrile (PAN) according to mass ratio.
The lithium ion battery coil core that the present invention provides only comprises positive plate and negative plate, and it instead of the barrier film in existing battery roll core by functional coating on positive plate or negative plate coated on both sides, this functional coating, and avoid positive plate, negative plate directly contacts.
In the present invention, the composition of anode sizing agent layer and cathode size layer is that this area is existing known, describe in detail the most one by one in the present invention, being 92.5:3.5:0.5:3.5 proportioning composition if anode sizing agent layer is LFP, SP, Ks-6, PVDF according to mass ratio, cathode size layer is CNT, graphite, SP, SBR, CMC are 8.5:86:1.5:2.5:1.5 proportioning composition according to mass ratio.The lithium ion battery coil core that the present invention makes makes lithium ion battery with organic bath or polymer dielectric.
So the present invention be coated in positive plate or negative plate two-sided on functional coating by Kynoar (PVDF), polymethyl methacrylate (PMMA), polyacrylonitrile (PAN) mixing form, it has the insulating coating of electronics, ionic conductivity, can substitute for existing barrier film, on the one hand it avoid owing to barrier film dislocation causes positive and negative plate to contact the short circuit caused, and improves the security performance of power lithium-ion battery；Another aspect is less than 10 microns due to coating layer thickness, and it is less than existing septate thickness, thus is conducive to improving the energy density of battery.
Accompanying drawing explanation
Fig. 1 is the structural representation of positive plate in the present invention；
Fig. 2 is the battery roll core that embodiment 2 winding method is made；
Fig. 3 is the battery roll core that embodiment 3 lamination process is made.
Detailed description of the invention
Embodiment 1
Being illustrated in figure 1 the structural representation of positive plate, substrate layer 3 is the utter misery aluminium foil that dual coating has nano-scale carbon nanotube, at the dual coating anode sizing agent layer 2 of substrate layer 3, then coats the gross thickness functional coating 1 less than 10 microns on anode sizing agent layer 2.
Wherein: anode sizing agent layer is to be 92.5:3.5:0.5:3.5 proportioning by LFP, SP, Ks-6, PVDF according to mass ratio.
Negative plate is to be had the Copper Foil of doped carbon nanometer pipe to be basic unit by dual coating, and in the dual coating of Copper Foil, cathode size layer is formed, and described cathode size layer is to be 8.5:86:1.5:2.5:1.5 proportioning by CNT, graphite, SP, SBR, CMC according to mass ratio.
Functional coating is to be 8:1:1 proportioning by PVDF, PMMA, PNA three according to mass ratio.
Embodiment 2:
(1) dual coating is had nano-scale carbon nanotube utter misery aluminium foil dual coating on anode sizing agent layer, dry to obtain positive plate；
(2) dual coating is had doped carbon nanometer pipe graphite linings Copper Foil dual coating on cathode size layer, dry to obtain negative plate；
(3) it is coated with functional coating the two-sided of positive plate, dries to intercept positive plate；
(4) obstruct positive plate and negative plate are made battery roll core according to winding method, as shown in Figure 2.
Embodiment 3
(1) dual coating is had nanoscale graphite alkene doping layer of charcoal utter misery aluminium foil dual coating on anode sizing agent layer, dry to obtain positive plate；
(2) dual coating is had doped graphene graphite linings Copper Foil dual coating on cathode size layer, dry to obtain negative plate；
(3) it is coated with functional coating the two-sided of positive plate, dries to intercept positive plate；
(4) obstruct positive plate and negative plate are made battery roll core according to lamination process, as shown in Figure 3.
Embodiment 4
(1) dual coating is had nano-scale carbon nanotube utter misery aluminium foil dual coating on anode sizing agent layer, dry to obtain positive plate；
(2) dual coating is had doped carbon nanometer pipe graphite linings Copper Foil dual coating on cathode size layer, dry to obtain negative plate；
(3) it is coated with functional coating the two-sided of negative plate, dries to intercept negative plate (it is similar to that in Fig. 1 the structure intercepting positive plate)；
(4) positive plate and obstruct negative plate are made battery roll core according to winding method.
It should be pointed out that, for those skilled in the art, on the premise of without departing from the application principle, it is also possible to make some improvements and modifications, these improvements and modifications also should be regarded as the protection domain of the application.
Claims (9)
1. an aseptate lithium ion battery coil core, it is characterised in that: it is made up of positive plate and negative plate, and in described positive plate, negative plate, the two-sided of at least one pole piece is coated with functional coating；Described functional coating is to be mixed by Kynoar, polymethyl methacrylate, polyacrylonitrile.
The aseptate lithium ion battery coil core of one the most according to claim 1, it is characterised in that: described Kynoar, polymethyl methacrylate, the mass ratio of polyacrylonitrile are 8:1:1 or 7:1.5:1.5.
The aseptate lithium ion battery coil core of one the most according to claim 1, it is characterised in that: the gross thickness of described functional coating is less than 10 microns.
The aseptate lithium ion battery coil core of one the most according to claim 1, it is characterised in that: described positive plate is the utter misery paper tinsel that dual coating has rich lithium material, and described rich lithium material is LiFePO4, NCM ternary material, LiMn2O4 or cobalt acid lithium；Described utter misery paper tinsel refers to that the dual coating of aluminium foil has nano-scale carbon nanotube or the layer of charcoal of nanoscale graphite alkene doping.
The aseptate lithium ion battery coil core of one the most according to claim 1, it is characterised in that: described negative plate refers to the graphite linings having doped carbon nanometer pipe or Graphene in the dual coating of Copper Foil.
The preparation method of a kind of aseptate lithium ion battery coil core the most as claimed in claim 1, it is characterised in that: step is as follows:
(1) by anode sizing agent layer in the dual coating of aluminium foil, positive plate is dried to obtain；
(2) by cathode size layer in the dual coating of Copper Foil, negative plate is dried to obtain；
(3) it is coated with functional coating the two-sided of positive plate, dries to intercept positive plate；Or it is coated with functional coating the two-sided of negative plate, dry to intercept negative plate；
(4) positive plate and negative plate will be intercepted, or by positive plate and obstruct negative plate, maybe obstruct positive plate be made battery roll core with intercepting negative plate according to winding method or lamination process.
Preparation method the most according to claim 6, it is characterised in that: in described step (1), aluminium foil refers to that dual coating has the utter misery paper tinsel of rich lithium material, and described rich lithium material is LiFePO4, NCM ternary material, LiMn2O4 or cobalt acid lithium；Described utter misery paper tinsel refers to that the dual coating of aluminium foil has nano-scale carbon nanotube or the layer of charcoal of nanoscale graphite alkene doping.
Preparation method the most according to claim 6, it is characterised in that: in described step (2), Copper Foil refers to the graphite linings having doped carbon nanometer pipe or Graphene in the dual coating of Copper Foil.
Preparation method the most according to claim 6, it is characterised in that: in described step (3), functional coating is to be that 8:1:1 or 7:1.5:1.5 mixes by Kynoar, polymethyl methacrylate, polyacrylonitrile according to mass ratio.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610467988.1A CN105958112A (en) | 2016-06-24 | 2016-06-24 | Non-diaphragm lithium ion battery coiled core and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610467988.1A CN105958112A (en) | 2016-06-24 | 2016-06-24 | Non-diaphragm lithium ion battery coiled core and preparation method therefor |
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| CN105958112A true CN105958112A (en) | 2016-09-21 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107302106A (en) * | 2017-07-10 | 2017-10-27 | 哈尔滨工业大学 | Integrated device of a kind of lithium battery based on mesoporous titanium dioxide nano-tube array/smart window and preparation method thereof |
| CN109698320A (en) * | 2019-01-30 | 2019-04-30 | 中银（宁波）电池有限公司 | Positive plate of lithium battery, winding product and coiling type lithium battery |
| CN110495033A (en) * | 2017-12-01 | 2019-11-22 | 株式会社Lg化学 | Electrode and electrode assembly |
| CN110649313A (en) * | 2019-10-14 | 2020-01-03 | 陕西煤业化工技术研究院有限责任公司 | Lithium ion battery without diaphragm and preparation method thereof |
| CN111416127A (en) * | 2020-03-30 | 2020-07-14 | 珠海冠宇动力电池有限公司 | Positive plate and preparation method and application thereof |
| CN113270691A (en) * | 2021-04-23 | 2021-08-17 | 肇庆合林立业科技有限公司 | Pole piece/diaphragm integrated lithium ion battery and preparation method thereof |
| CN113690543A (en) * | 2021-07-09 | 2021-11-23 | 惠州锂威电子科技有限公司 | Integrated pole piece and preparation method thereof, secondary battery and battery module |
| CN116344961A (en) * | 2023-05-23 | 2023-06-27 | 苏州宇量电池有限公司 | Diaphragm-free battery cell, preparation method thereof and lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107302106A (en) * | 2017-07-10 | 2017-10-27 | 哈尔滨工业大学 | Integrated device of a kind of lithium battery based on mesoporous titanium dioxide nano-tube array/smart window and preparation method thereof |
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| CN110649313B (en) * | 2019-10-14 | 2021-09-14 | 陕西煤业化工技术研究院有限责任公司 | Lithium ion battery without diaphragm and preparation method thereof |
| CN111416127A (en) * | 2020-03-30 | 2020-07-14 | 珠海冠宇动力电池有限公司 | Positive plate and preparation method and application thereof |
| CN113270691A (en) * | 2021-04-23 | 2021-08-17 | 肇庆合林立业科技有限公司 | Pole piece/diaphragm integrated lithium ion battery and preparation method thereof |
| CN113690543A (en) * | 2021-07-09 | 2021-11-23 | 惠州锂威电子科技有限公司 | Integrated pole piece and preparation method thereof, secondary battery and battery module |
| CN116344961A (en) * | 2023-05-23 | 2023-06-27 | 苏州宇量电池有限公司 | Diaphragm-free battery cell, preparation method thereof and lithium ion battery |
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Application publication date: 20160921 |
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