CN107887656A - A kind of gel state lithium ion battery and preparation method thereof - Google Patents
A kind of gel state lithium ion battery and preparation method thereof Download PDFInfo
- Publication number
- CN107887656A CN107887656A CN201711113955.8A CN201711113955A CN107887656A CN 107887656 A CN107887656 A CN 107887656A CN 201711113955 A CN201711113955 A CN 201711113955A CN 107887656 A CN107887656 A CN 107887656A
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- Prior art keywords
- lithium ion
- ion battery
- gel state
- preparation
- state lithium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
-
- 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 discloses a kind of gel state lithium ion battery and preparation method thereof, by persistently keeping high vacuum environment in gel batteries liquid electrolyte polymerization process, the inhibition that the oxygen in air rises to monomer can effectively be removed, the reaction time of monomer polymerization can be greatly shortened, improves production efficiency.
Description
Technical field
The invention belongs to field of lithium ion battery, specifically, is related to a kind of gel state lithium ion battery and its preparation side
Method.
Background technology
Lithium ion battery has energy density high, is with fastest developing speed in recent years, prospect is seen the most the advantages that having extended cycle life
Good secondary cell, is widely used to smart mobile phone, tablet personal computer, digital camera, electronic toy, electronic navigator etc..Closely
Nian Lai, lithium ion battery have also obtained relatively broad answer in fields such as new-energy automobile, communication base station, military affairs, Aero-Space
With.
The lithium ion battery of volume production all uses liquid electrolyte substantially at present, and battery is by positive pole, negative pole, barrier film, liquid electricity
Liquid is solved to form with shell.Because liquid electrolyte has leakage, interface continues that side reaction aerogenesis, electrolyte is inflammable, cycle consumption
The defects of electrolyte, so various countries unanimously think that lithium ion battery of future generation will be that energy density and security performance are preferably entirely solid
State battery.All-solid-state battery can suppress Li dendrite, it is possible to be significantly larger than current graphite using energy density and current potential
Lower lithium metal is also suitable for the Volume Changes of material as negative pole, so solid state battery is in energy density, security
Energy, high-temperature behavior, there is great advantage on cycle performance, the selectable material of both positive and negative polarity active material is more extensive, is public
The secondary cell for the most prospect recognized.But the interracial contact of all-solid-state battery electrode and electrolyte is poor, and ionic conductivity is low, mesh
Preceding technology is still immature.And the gel batteries between liquid state batteries and all-solid-state battery, both advantages are combined, industry
Change technical barrier to be hacked substantially, the initial stage in commercialization, be the lithium ion battery of future generation of great potential.
Gel batteries mainly have three kinds of technologies at present：Bellcore technologies, i.e. PVDF-HFP abstraction techniques；PVDF barrier films apply
Glue technology；Situ polymerization technique.All there is the defects of complex process, cost is high, and electrolyte encapsulation is not strong in the above two, at present most
For it is feasible be situ polymerization technique.
Situ polymerization technique mainly adds initiator and monomer-polymer in liquid electrolyte, then in certain condition
Lower monomer-polymer in battery core interior polymeric, liquid electrolyte by tight in the three-dimensional network of polymer, in the absence of leakage
Corrosion risk；Pole piece, barrier film and gel electrolyte interracial contact are close, and battery core properties are excellent, and security significantly improves,
Cost is lower.But gaseous impurity can be produced in current polymerization process, moisture can not be removed, so as to influence the purity of polymerization, with
As for causing, the parcel of electrolyte is not complete, and parcel is indifferent, influences the performance of battery.
In view of this it is special to propose the present invention.
The content of the invention
The technical problem to be solved in the present invention is overcome the deficiencies in the prior art, there is provided a kind of gel state lithium ion battery
And preparation method thereof, by persistently keeping high vacuum environment in gel batteries liquid electrolyte polymerization process, can effectively go
Except the inhibition that the oxygen in air rises to monomer, the reaction time of monomer polymerization can be greatly shortened, improves production effect
Rate.
In order to solve the above technical problems, the present invention is using the basic conception of technical scheme：
One aspect of the present invention provides a kind of preparation method of gel state lithium ion battery, comprises the following steps：
Step S1, the positive pole, negative pole, barrier film of battery are assembled into core body, core body is fitted into the shell provided with opening
Battery core is obtained, and dries water removal；
Step S2, liquid electrolyte is injected inside battery core by opening, is put into after standing a period of time in closed container；
Step S3, begins to warm up polymerisation, and when polymerisation is heated to 40-60 DEG C, sealed container interior is taken out very
Sky, and keep negative vacuum state to continue polymerisation；
Step S4, after completing polymerisation, it is melted into, partial volume, that is, obtains the lithium ion battery of gel state.
Further, the liquid electrolyte includes Multifunctional initiator, cyclic polymer, new function fluidized polymer etc.
Monomer-polymer.
Further, the battery core that electrolyte is injected in the step S2 stands 12h-24h.
Further, the vacuum for vacuum being born in the step S3 is -99Kpa~101Kpa.
Another aspect of the present invention provides a kind of gel state lithium ion battery, with the preparation side of above-mentioned gel state lithium ion battery
Method is prepared.
Specifically, the positive pole, negative pole, barrier film of gel batteries are assembled into core body, core body loads shell and drying removes
Water, then reinject the liquid containing the monomer-polymer such as Multifunctional initiator and cyclic polymer, new function fluidized polymer
Electrolyte, shell aperture stand 12-24h liquid infiltration electrodes to be electrolysed and barrier film.The battery of shell aperture is put into a sealing to hold
In device, polymerisation is begun to warm up, heating-up temperature now vacuumizes at 40-60 DEG C in closed container, and vacuum is extracted into-
99Kpa to -101Kpa simultaneously continues to keep, and gas caused by the moisture in container environment, oxygen, reaction is extracted out.Pass through Gao Zhen
Empty polymerization technique, polymerization time can be foreshortened to below 2h by original 12-36h, and the polymer poly generated is right bigger,
Stronger to the parcel ability of electrolyte, purity is higher.After electrolyte polymerization, battery presses normal procedure forming and capacity dividing, that is, is coagulated
The lithium ion battery of colloidal state.The technology can effectively lift the production efficiency and performance of gel batteries.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art.
The present invention can effectively be gone by persistently keeping high vacuum environment in gel batteries liquid electrolyte polymerization process
Except the inhibition that the oxygen in air rises to monomer, the reaction time of monomer polymerization can be greatly shortened, improves production effect
Rate；Vacuum environment can be such that reaction environment thoroughly closes, and remove caused gaseous impurity and that may be present in polymerization process
Moisture, prevent the purity of impurity effect polymerization；Under high vacuum environment, by extracting gas molecules caused by polycondensation reaction out,
Promote reaction to be carried out to positive direction, the degree of polymerization (molecular weight) of generated polymer can be increased, allow polymer three-dimensional network pair
The parcel ability of electrolyte is stronger, close to the level of all-solid-state battery.
The present invention is effectively improved the efficiency of electrolyte polymerization process and gathered by crossing introducing high vacuum polymerization technique
The performance of product is closed, is a very useful technology for the industrialization of gel batteries.
This operating method is simple, cost is low, can effectively lift the production efficiency and battery performance of gel batteries, practical
Property is strong, is advantageous to equipment promotion application.
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
A part of the accompanying drawing as the application, for providing further understanding of the invention, of the invention is schematic
Embodiment and its illustrate to be used to explain the present invention, but do not form inappropriate limitation of the present invention.Obviously, drawings in the following description
Only some embodiments, to those skilled in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.In the accompanying drawings：
Fig. 1 is that electrolyte of the present invention polymerize schematic diagram；
Fig. 2 is vacuum polymerization schematic device of the present invention.
In figure：1- electrolyte；2- initiators；3- monomer-polymers；4- vacuum polymerizations；Tridimensional network after 5- polymerizations；
6- polymerization process sealing containers；7- battery case openings；8- batteries；9- is vacuumized.
It should be noted that these accompanying drawings and word description are not intended as the design model limiting the invention in any way
Enclose, but be that those skilled in the art illustrate idea of the invention by reference to specific embodiment.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in embodiment is clearly and completely described, following examples be used for illustrate the present invention, but
It is not limited to the scope of the present invention.
It is term " on ", " under ", "front", "rear", "left", "right", " perpendicular in the description of the invention, it is necessary to explanation
Directly ", the orientation of the instruction such as " interior ", " outer " or position relationship are based on orientation shown in the drawings or position relationship, merely to just
In the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Embodiment one
As shown in Figure 1 and Figure 2, the preparation method of a kind of gel state lithium ion battery described in the present embodiment, by gel batteries
Positive pole, negative pole, barrier film be assembled into core body, load shell and simultaneously dry water removal, obtained battery 8, then reinjected containing more officials
The liquid electrolyte of energy initiator 2 and monomer-polymer 3, shell aperture 7 stand 12h liquid infiltration electrodes to be electrolysed and barrier film.
The battery 8 of shell aperture 7 is put into a sealing container 6, begins to warm up polymerisation, heating-up temperature is at 40 DEG C, now close
Close in container 6 and vacuumize 9, vacuum is extracted into -99Kpa and continues to keep, and the moisture in the environment of container 6, oxygen is discharged, by electricity
Reacting gas in pond 8 is in discharge from battery case opening.4 technologies are polymerize by high vacuum, can be by polymerization time by original
The 12-36h come foreshortens to below 2h, and the degree of polymerization of polymer 5 generated is bigger, purity stronger to the parcel ability of electrolyte
It is higher.After electrolyte polymerization 5, battery presses normal procedure forming and capacity dividing, that is, obtains the lithium ion battery of gel state.
Embodiment two
As shown in Figure 1 and Figure 2, the preparation method of a kind of gel state lithium ion battery described in the present embodiment, by gel batteries
Positive pole, negative pole, barrier film be assembled into core body, load shell and simultaneously dry water removal, obtained battery 8, then reinjected containing more officials
The liquid electrolyte of energy initiator 2 and monomer-polymer 3, shell aperture 7 stand 24h liquid infiltration electrodes to be electrolysed and barrier film.
The battery 8 of shell aperture 7 is put into a sealing container 6, begins to warm up polymerisation, heating-up temperature is at 60 DEG C, now close
Close in container 6 and vacuumize 9, vacuum is extracted into -101Kpa and continues to keep, and the moisture in the environment of container 6, oxygen are discharged, will
Reacting gas in battery 8 is in discharge from battery case opening.After electrolyte polymerization 5, battery presses normal procedure forming and capacity dividing,
Obtain the lithium ion battery of gel state.
The present invention can effectively be gone by persistently keeping high vacuum environment in gel batteries liquid electrolyte polymerization process
Except the inhibition that the oxygen in air rises to monomer, the reaction time of monomer polymerization can be greatly shortened, improves production effect
Rate；Vacuum environment can be such that reaction environment thoroughly closes, and remove caused gaseous impurity and that may be present in polymerization process
Moisture, prevent the purity of impurity effect polymerization；Under high vacuum environment, by extracting gas molecules caused by polycondensation reaction out,
Promote reaction to be carried out to positive direction, the degree of polymerization (molecular weight) of generated polymer can be increased, allow polymer three-dimensional network pair
The parcel ability of electrolyte is stronger, close to the level of all-solid-state battery.
Described above is only presently preferred embodiments of the present invention, not makees any formal limitation to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any technology people for being familiar with this patent
Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompting make it is a little change or be modified to
The equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit pair according to the present invention
Any simple modification, equivalent change and modification that above example is made, in the range of still falling within the present invention program.
Claims (5)
1. a kind of preparation method of gel state lithium ion battery, it is characterised in that comprise the following steps：
Step S1, the positive pole, negative pole, barrier film of battery are assembled into core body, core body, which is fitted into the shell provided with opening, to be obtained
Battery core, and dry water removal；
Step S2, liquid electrolyte is injected inside battery core by opening, is put into after standing a period of time in closed container；
Step S3, begins to warm up polymerisation, and when polymerisation is heated to 40-60 DEG C, sealed container interior is vacuumized, and
Negative vacuum state is kept to continue polymerisation；
Step S4, after completing polymerisation, it is melted into, partial volume, that is, obtains the lithium ion battery of gel state.
A kind of 2. preparation method of gel state lithium ion battery according to claim 1, it is characterised in that the liquid electricity
Solving liquid includes the monomer-polymers such as Multifunctional initiator, cyclic polymer, new function fluidized polymer.
A kind of 3. preparation method of gel state lithium ion battery according to claim 1, it is characterised in that the step S2
The battery core of middle injection electrolyte stands 12h-24h.
A kind of 4. preparation method of gel state lithium ion battery according to claim 1, it is characterised in that the step S3
In bear vacuum vacuum be -99Kpa~101Kpa.
5. a kind of gel state lithium ion battery, it is characterised in that with any gel state lithium ion batteries of claim 1-4
Preparation method is prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711113955.8A CN107887656A (en) | 2017-11-13 | 2017-11-13 | A kind of gel state lithium ion battery and preparation method thereof |
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| CN201711113955.8A CN107887656A (en) | 2017-11-13 | 2017-11-13 | A kind of gel state lithium ion battery and preparation method thereof |
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| CN107887656A true CN107887656A (en) | 2018-04-06 |
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Effective date of registration: 20200527 Address after: Room g0232, headquarters building, Changsha Zhongdian Software Park, No. 39, Jianshan Road, high tech Development Zone, Changsha City, Hunan Province Applicant after: Thornton New Energy Technology (Changsha) Co.,Ltd. Address before: 411100 Hunan province Xiangtan City Jiuhua Demonstration Zone No. 78 West Benz Applicant before: SOUNDON NEW ENERGY TECHNOLOGY Co.,Ltd. |
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