CN207743344U - The solid lithium ion battery of composite polymer electrolyte - Google Patents
The solid lithium ion battery of composite polymer electrolyte Download PDFInfo
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- CN207743344U CN207743344U CN201721249756.5U CN201721249756U CN207743344U CN 207743344 U CN207743344 U CN 207743344U CN 201721249756 U CN201721249756 U CN 201721249756U CN 207743344 U CN207743344 U CN 207743344U
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- polymer electrolyte
- composite polymer
- lithium ion
- composite
- ion battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model is related to a kind of solid lithium ion batteries of composite polymer electrolyte, it is characterized in that：Composite polymer electrolyte including positive electrode, negative material and negative material upper and lower surface is sequentially placed encapsulation and constitutes solid lithium ion battery；The composite polymer electrolyte includes the mixed liquor composition solid composite polymeric object dielectric film that polymer electrolyte matrix, lithium salts, inorganic compound and lithium ion conduction matrix obtain after mixing.Advantageous effect：Composite polymer electrolyte can act on forming network structure by physical crosslinking in the utility model, and this network structure keeps stability under certain condition.Composite polymer electrolyte prepared by the utility model spontaneous can form a film, and have higher safety.Relative to other composite polymer electrolytes, the raw material that this method uses is easy to get, and production process can produce in existing lithium electricity producing equipment, and all has preferable electrochemical stability using material.
Description
Technical field
The utility model belongs to battery technology field more particularly to a kind of composite polymer electrolyte solid lithium ion battery
And preparation method thereof.
Background technology
Lithium ion battery is for other secondary cells, the density, output voltage height with higher energy and longevity
The advantages that long is ordered, universal use is obtained in electronic product and automotive field；And with the exhaustion of traditional fossil energy, environment
Pollution and the continuous aggravation of greenhouse effects, green energy resource exploitation are extremely urgent.The electrolyte of present lithium ion battery is mostly liquid
Leakage, burning, the danger for decomposing even explosion can occur in use for body electrolyte, seriously affect the person and property peace
Entirely.As electronic device and electric vehicle require to improve for the energy density of lithium ion battery, high rate performance, the peace of lithium battery
Full performance is just particularly important.
For liquid electrolyte, composite polymer electrolyte has light weight, viscoplasticity good and good film-forming property
The advantages that, the disadvantage mentioned above of liquid electrolyte can be overcome, improve the safety that lithium ion battery uses.It is widely studied at present
Composite polymer electrolyte matrix be polyethylene glycol oxide, compound composition composite polymer electrolyte, but polyoxygenated with lithium salts
Ethylene is easy to crystallize at room temperature, and more segments are in crystalline region at normal temperatures, can not participate in lithium ion transmission；Therefore it prepares multiple
Conjunction polymer dielectric ionic conductivity is relatively low, and mechanical performance is not strong, limits its use.Blending, copolymerization, friendship can generally be passed through
Connection, dissaving structure inhibit to crystallize, and improve its room-temperature conductivity.Wherein crosslinking, dissaving structure electrolyte prepare ratio
It is more complex, and cost is higher, can not meet Li electricity enterprises requirement.And be blended, copolymerization process it is simple, can both improve multiple
Polymer dielectric ionic conductivity is closed, ensures lithium ion battery safety performance, and production cost can be reduced.In view of above excellent
Point, it is necessary to which a kind of preparation method and lithium with excellent electrochemical performance and cheap composite polymer electrolyte are provided
Ion battery
Utility model content
Purpose of the utility model is to overcome the shortcomings of the above technology, and to provide a kind of composite polymer electrolyte solid-states
Lithium ion battery, composite polymer electrolyte can act on forming network structure by physical crosslinking, under certain condition network knot
Structure keeps stability；The composite polymer electrolyte of preparation spontaneous can form a film, and have higher safety.
The utility model to achieve the above object, using following technical scheme：A kind of solid-state of composite polymer electrolyte
Lithium ion battery, it is characterized in that：Composition polymer electrolysis including positive electrode, negative material and negative material upper and lower surface
Matter is sequentially placed encapsulation and constitutes solid lithium ion battery；The composite polymer electrolyte includes polymer electrolyte matrix, lithium
The mixed liquor that salt, inorganic compound and lithium ion conduction matrix obtain after mixing constitutes solid composite polymeric object electrolyte
Film.
Advantageous effect：Composite polymer electrolyte can act on forming network structure by physical crosslinking in the utility model,
This network structure keeps stability under certain condition.The utility model prepare composite polymer electrolyte can it is spontaneous at
Film has higher safety.Relative to other composite polymer electrolytes, the raw material that this method uses is easy to get, production process
It can be produced in existing lithium electricity producing equipment, and all there is preferable electrochemical stability using material.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic network structure of polymer electrolyte matrix.
In figure：1, positive electrode, 2, composite polymer electrolyte, 3, negative material.
Specific implementation mode
Specific embodiment of the present utility model is described in detail with reference to preferred embodiment.
Attached drawing is referred to, a kind of solid lithium ion battery of composite polymer electrolyte, including anode are present embodiments provided
1, negative material 3 and the composite polymer electrolyte of negative material upper and lower surface 2 are sequentially placed two layers of assembled package and constitute admittedly
State lithium ion battery；The composite polymer electrolyte includes polymer electrolyte matrix, lithium salts, inorganic compound and lithium ion
The mixed liquor that conductive matrix obtains after mixing constitutes solid composite polymeric object dielectric film.
Refer to attached drawing 2, one kind in polymer electrolyte matrix PVDF, modifier and branched p 0 lypropylene ester compound
Or it is several, and polymer electrolyte matrix is physical crosslinking to form network structure by branched structure；The polymer dielectric
Matrix dosage is the 10%-80% of composite polymer electrolyte quality.The lithium salts of composite polymer electrolyte is bis trifluoromethyl
Sulphur imine lithium, lithium perchlorate, lithium hexafluoro phosphate, hexafluoroarsenate lithium, LiBF4, dioxalic acid lithium borate, difluoro oxalate boric acid
The one or more of lithium or trifluoromethyl sulfonic acid lithium；The lithium salts dosage is 5% to the 80% of composite polymer electrolyte quality.
The inorganic compound of composite polymer electrolyte includes one kind in nano silicon dioxide, nano-titanium dioxide or nano aluminium oxide
Or it is several；The inorganic compound dosage is the 0.5%-80% of composite polymer electrolyte quality.Composite polymer electrolyte
Lithium ion conduction matrix be polyethylene glycol dimethyl ether；The lithium ion conduction matrix dosage is composite polymer electrolyte quality
30-70%.The inorganic nano-particle grain size of composite polymer electrolyte is 20-200nm.Composite polymer electrolyte passes through
Solution casting method and knife coating are made.Active material in positive electrode be LiFePO4, cobalt acid lithium or sulfide one kind or
It is several.Active material is the one or more of lithium metal, lithium metal alloy, lithium titanate, graphite or silicon materials in negative material.
Prepare the specific steps embodiment of the utility model
1) polyethylene glycol dimethyl ether and lithium salts LiTFSI are dissolved in acetonitrile, the mass concentration of polyethylene glycol dimethyl ether is
The mass concentration of 10%, LiTFSI are 10%；Then it is added used as the cobalt acid lithium LCO of positive electrode active materials in the solution and is used as
The acetylene black and carbon nanotube of conductive agent, the wherein mass concentration of LCO are 70%, and the mass concentration of acetylene black is 5%, and carbon is received
The mass concentration of mitron is 5%；Any of the above material is stirred into 2-8h, so that it is sufficiently mixed and prepares slurry.The slurry is applied
The aluminium foil both sides to 12um are covered, the forced air drying 20h at 85 DEG C is rolled to prepare positive plate；
2) attached drawing 2 is referred to, PVDF-HFP is dissolved in N-Methyl pyrrolidone (NMP), and wherein PVDF-HFP solid contents are
10%.Polyethylene glycol dimethyl ether, alumina in Nano level and lithium salts LiTFSI are added in PVDF-HFP solution, 12h is stirred,
Different raw material are able to fully dispersed, and wherein polyethylene glycol dimethyl ether accounts for gross mass 40%, and nanoscale alundum (Al2O3) accounts for total matter
Amount 10%, [O]/[Li]=20.Solution prepared above is evenly coated in using knife coating on tetrafluoroethene plate, heating, drying
Spare, it is 4.58 × 10 to obtain composite polymer electrolyte conductivity at room temperature-5S/cm；
3) with the material of preparation anode, lithium piece is cathode and to prepare material be electrolyte, will just using lamination manufacturing process
Pole material, composite polymer electrolyte, negative material, which is sequentially overlapped, prepares solid lithium ion battery；
4) according to 2) operating procedure, polyethylene glycol dimethyl ether addition is accounted for into gross mass 60%, then prepares composite polymeric
Object electrolyte, it is 1.38 × 10 to obtain composite polymer electrolyte conductivity at room temperature-4S/cm；
5) according to 3) operating procedure, another solid lithium ion battery is prepared using lamination manufacturing process；
6) PVDF-HFP is dissolved in NMP, wherein PVDF-HFP solid contents are 10%.By polyethylene glycol dimethyl ether, nanometer
Grade aluminum oxide and lithium salts LiTFSI are added in PVDF-HFP solution, stir 12h, different raw material be able to it is fully dispersed, wherein
Polyethylene glycol dimethyl ether accounts for gross mass 60%, and alumina in Nano level accounts for gross mass 10%, [O]/[Li]=20.It will be made above
Solution is evenly coated in using knife coating on positive plate, and heating, drying is spare；
7) it includes anode and diaphragm two parts that step 6), which prepares positive plate, using lamination manufacturing process, by positive plate, lithium piece
It is sequentially overlapped and prepares another solid lithium ion battery；
8) aluminum isopropylate and methoxy poly (ethylene glycol) are heated under vacuum conditions and modified nano-alumina are obtained by the reaction,
Nano aluminium oxide is replaced with modified nano-alumina according to step 6), obtains lithium ion solid state battery；
9) nano aluminium oxide is replaced with nano silicon oxide according to step 6), obtains solid lithium ion battery.
The above-mentioned detailed description carried out to the composite polymer electrolyte solid lithium ion battery with reference to embodiment, is explanation
Property without being restrictive, several embodiments can be enumerated according to limited range, therefore do not departing from the utility model
Change and modification under general plotting should belong within the scope of protection of the utility model.
Claims (1)
1. a kind of solid lithium ion battery of composite polymer electrolyte, it is characterized in that：Including positive electrode, negative material and
The composite polymer electrolyte of negative material upper and lower surface is sequentially placed encapsulation and constitutes solid lithium ion battery；The composite polymeric
Object electrolyte includes that polymer electrolyte matrix, lithium salts, inorganic compound and lithium ion conduction matrix obtain after mixing
Mixed liquor constitutes solid composite polymeric object dielectric film, and the polymer electrolyte matrix is physical crosslinking to be formed by branched structure
Network structure.
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| CN201721249756.5U CN207743344U (en) | 2017-09-27 | 2017-09-27 | The solid lithium ion battery of composite polymer electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721249756.5U CN207743344U (en) | 2017-09-27 | 2017-09-27 | The solid lithium ion battery of composite polymer electrolyte |
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| CN207743344U true CN207743344U (en) | 2018-08-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658495A (en) * | 2017-09-27 | 2018-02-02 | 天津力神电池股份有限公司 | The solid lithium ion battery of composite polymer electrolyte |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658495A (en) * | 2017-09-27 | 2018-02-02 | 天津力神电池股份有限公司 | The solid lithium ion battery of composite polymer electrolyte |
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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230222 Address after: 300457 No. 38, Haitai South Road, Binhai high tech Industrial Development Zone (outer ring), Binhai New Area, Tianjin Patentee after: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. Patentee after: Tianjin Juyuan New Energy Technology Co.,Ltd. Address before: 300384 Tianjin Xiqing District Binhai hi tech Industrial Development Zone (outer ring) 38 Haitai South Road Patentee before: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. |