CN104377345A - Miniature energy storage device electrode and miniature energy storage device, and formation methods thereof - Google Patents
Miniature energy storage device electrode and miniature energy storage device, and formation methods thereof Download PDFInfo
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- CN104377345A CN104377345A CN201310356463.7A CN201310356463A CN104377345A CN 104377345 A CN104377345 A CN 104377345A CN 201310356463 A CN201310356463 A CN 201310356463A CN 104377345 A CN104377345 A CN 104377345A
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Classifications
-
- 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
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/84—Processes for the manufacture of hybrid or EDL capacitors, or components thereof
- H01G11/86—Processes for the manufacture of hybrid or EDL capacitors, or components thereof specially adapted for electrodes
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a formation method of a miniature energy storage device electrode. The method comprises the following steps: making a graphical miniature masking plate; providing a substrate, and preparing an electrode slurry; placing the miniature masking plate on the substrate; carrying out atomization spraying on the substrate covered by the miniature masking plate with the electrode slurry; and separating the miniature masking plate from the substrate, and drying the electrode slurry to form a graphical electrode layer on the substrate. The formation method of the miniature energy storage device electrode makes the electrode layer have a complicate and fine shape and a very high precision through a miniature masking plate technology; the electrode slurry is uniformly sprayed on the surface of the substrate through a spraying technology, so the thickness of the finally formed electrode layer is uniform; and the formation method of the miniature energy storage device electrode has the advantages of simple technologies, low cost, and easy large-scale popularization. The invention also discloses the miniature energy storage device electrode, a miniature energy storage device and a formation method of the device.
Description
Technical field
The invention belongs to microdevice technology and electrode machining technical field, be specifically related to a kind of miniature energy storage device electrode, miniature energy storage device and forming method thereof.
Background technology
At present, minitype portable electronic device is increasing in the demand in the fields such as mobile communication, medical treatment, Internet of Things, and this makes the exploitation of miniature energy storage device product need equally to match with it on capacity and size.Therefore, the technology that miniature energy storage device preparation is relevant reports also cumulative year after year.Ultracapacitor and lithium ion battery are respectively as power-type and the same research emphasis being miniature energy storage device and developing of energy type energy storage device, and both can complement one another according to the demand of product practical application.
The technology of preparing of miniature energy storage device also presents diversified trend in recent years.Such as: 1) utilize dry etching and wet-etching technology in MEMS technology to make the three-dimensional structure of high-ratio surface, the mode then adopt selectivity deposition, sputtering or electroplate prepares miniature ultracapacitor or lithium ion battery structure; 2) the method thermal reduction of laser engraving is utilized to prepare Graphene micro super capacitor structure; 3) method of inkjet printing is adopted to prepare carbon back micro super capacitor.
Wherein have following shortcoming in above-mentioned prior art: 1) MEMS technology related manufacturing processes complex process, cost is high; 2) method of laser engraving is mainly used for thermal reduction and prepares the miniature energy storage device of Graphene, so range of application receives larger restriction, and obtains the precision of device not as MEMS method; 3) inkjet technology is compared with above-mentioned two kinds of technology, and technology precision is the poorest, and this technology is very high to the coherence request of slurry.Therefore the technology of preparing of the miniature energy storage device that a kind of novel cost is low, precision is good is urgently proposed.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, first object of the present invention is to propose that a kind of cost is low, precision good, be easy to the formation method of the miniature energy storage device electrode of large-scale production.
For achieving the above object, according to the formation method of the miniature energy storage device electrode of the embodiment of the present invention, comprise the following steps: S1. makes patterned miniature mask plate; S2. provide substrate, and prepare electrode slurry; S3. described miniature mask plate is placed in described substrate; S4. by described electrode slurry atomizing spraying in the described substrate being covered with described miniature mask plate; And described miniature mask plate is separated with described substrate by S5., after described electrode slurry drying, described substrate forms patterned electrode layer.
The formation method of miniature energy storage device electrode of the present invention is by miniature mask plate technology, and make electrode layer can make complicated meticulous shape, precision is very high; By spraying technology by electrode slurry even application in substrate surface, thickness is more even everywhere to make electrode layer; Possess skills simple, cost is low, is easy to the advantage of large-scale promotion.
In one embodiment of the invention, in described step S1, make described miniature mask plate by laser engraving machine.
In one embodiment of the invention, the size range of described miniature mask plate is: length is 1-100mm, and width is 1-100mm, and thickness is 0.1-5mm.
In one embodiment of the invention, the material of described miniature mask plate is PETG or polymethyl methacrylate.
In one embodiment of the invention, the material of described substrate is PETG, dimethyl silicone polymer, Kynoar, nonwoven fabrics or silicon wafer.
In one embodiment of the invention, solute in described electrode slurry is one or more the combination in active carbon, graphite powder, carbon nano-tube, Graphene, cobalt acid lithium, lithium nickel cobaltate, LiMn2O4, LiFePO4 or lithium titanate, solvent is water, absolute ethyl alcohol, acetone, ethylene glycol, 1-METHYLPYRROLIDONE, dimethyl formamide, one or more combination of dimethyl sulfoxide (DMSO).
In one embodiment of the invention, after described step S5, also comprise: electrode layer described in roll-in and described substrate.
In one embodiment of the invention, between described step S3 and step S4, also comprise: the position of default electrode layer on the substrate forms current collection fluid layer.
In one embodiment of the invention, described electrode layer is L shape, rectangle, keyhole or comb finger-type.
In one embodiment of the invention, miniature energy storage device is ultracapacitor or lithium ion battery.
Second object of the present invention is to propose that a kind of cost is low, precision good, be easy to the miniature energy storage device electrode of large-scale production.
For achieving the above object, according to the miniature energy storage device electrode of the embodiment of the present invention, be that the formation method of above-disclosed miniature energy storage device electrode obtains.
3rd object of the present invention is to propose that a kind of cost is low, precision good, be easy to the formation method of the miniature energy storage device of large-scale production.
For achieving the above object, according to the formation method of the miniature energy storage device of the embodiment of the present invention, comprise the following steps: A., by the formation method of miniature energy storage device electrode mentioned above, prepares positive electrode and the negative electrode of miniature energy storage device; B. positive pole ear and negative lug is pasted; C. between described positive electrode and negative electrode, dielectric substrate is formed; And D. encapsulates.
According to the formation method of the miniature energy storage device of the embodiment of the present invention, its electrode is by miniature mask plate technology, make electrode material can be complicated meticulous shape, precision is very high, by spraying technology by electrode slurry even application in substrate surface, make electrode layer thickness distribution everywhere more even.Therefore, two electrodes can do consistency is good, avoid and cause device performance unstable because of electrode area or quality difference.In addition the method technology is simple, and cost is low, is easy to large-scale promotion.
In one embodiment of the invention, described positive electrode and negative electrode are positioned on same substrate, or are positioned on different substrate.
4th object of the present invention is to propose that a kind of cost is low, precision good, be easy to the miniature energy storage device of large-scale production.
For achieving the above object, according to the miniature energy storage device of the embodiment of the present invention, be obtained by the formation method of above-disclosed miniature energy storage device.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the flow chart of the formation method of the miniature energy storage device electrode of the embodiment of the present invention;
Fig. 2 is the schematic diagram of the patterned miniature mask plate of the embodiment of the present invention;
Fig. 3 is the schematic diagram of the electrode layer of the pair of L-shaped of the embodiment of the present invention, rectangle, keyhole or comb finger-type;
Fig. 4 is the flow chart of the formation method of the miniature energy storage device of the embodiment of the present invention;
Fig. 5 is the structural representation of the miniature energy storage device of the embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
First object of the present invention is to propose that a kind of cost is low, precision good, be easy to the formation method of the miniature energy storage device electrode of large-scale production.
As shown in Figure 1, the formation method of the miniature energy storage device electrode of the embodiment of the present invention, comprises the following steps:
S1. patterned miniature mask plate is made.
Particularly, the material of this miniature mask plate can be PETG (PET), polymethyl methacrylate (PMMA) etc.The size of miniature mask plate and pattern are by computer software (such as autoCAD, coreldraw) design.In one embodiment of the invention, described miniature mask plate is made by laser engraving machine.Particularly, the preparation by regulating the parameters such as the power of laser engraving machine and linear speed to realize final mask plate.Alternatively, the size range of miniature mask plate is: length is 1-100mm, and width is 1-100mm, and thickness is 0.1-5mm.
Fig. 2 shows a patterned miniature mask plate, and wherein black part is divided into graphical hollow part.It should be noted that, so-called miniature mask plate, represent that the size of its hollow out figure is greatly about millimeter magnitude, mean that the final electrode formed also is millimeter magnitude size, belong to accurate microdevice.
S2. provide substrate, and prepare electrode slurry.
Particularly, the material of substrate can be PETG (PET), and dimethyl silicone polymer (PDMS), Kynoar (PVDF), nonwoven fabrics, silicon wafer etc., those skilled in the art can select flexibly according to embody rule.Electrode slurry similarly can be selected according to embody rule flexibly by those skilled in the art.According to one embodiment of present invention, solute in electrode slurry can be one or more combination of active carbon, graphite powder, carbon nano-tube, Graphene, cobalt acid lithium, lithium nickel cobaltate, LiMn2O4, LiFePO4 or lithium titanate isoreactivity material, and solvent can be one or more the combination in water, absolute ethyl alcohol, acetone, ethylene glycol, 1-METHYLPYRROLIDONE (NMP), dimethyl formamide (DMF), dimethyl sulfoxide (DMSO) (DMSO) equal solvent.Such as, 1g Dispersion of Solute Matter can be made into certain density slurry in 10-100ml solvent, concrete concentration can be selected as required.Preferably, can also by ultrasonic solute is disperseed in a solvent evenly.
S3. miniature mask plate is placed in substrate.
Particularly, stack after the aligned in position graphical hollow part on miniature mask plate and substrate preparing formed electrode.
S4. by electrode slurry atomizing spraying in the substrate being covered with miniature mask plate.
Particularly, first electrode slurry is positioned in the hopper of spraying equipment, after mixing up the parameters such as spraying equipment gas speed bore, carries out atomizing spraying.Thus, the local location of corresponding with the hollow part of miniature mask plate substrate covers has gone up electrode slurry.
S5. miniature mask plate is separated with substrate, after electrode slurry drying, substrate is formed patterned electrode layer.
Particularly, miniature mask plate is separated with substrate, after a period of time natural drying or the dry a period of time (such as 10min-30min) of artificial condition, after the solvent evaporated away in electrode slurry, substrate defines patterned solid-state electrode layer, namely obtains miniature energy storage device electrode.The size and dimension of this miniature energy storage device electrode is determined by the pattern of miniature mask plate, and its volume and quality are determined jointly by the area of the pattern of miniature mask plate and coating thickness.
According to the formation method of the miniature energy storage device electrode of the embodiment of the present invention, at least tool has the following advantages:
1., by miniature mask plate technology, make electrode layer can make complicated meticulous shape, precision is very high;
2. by spraying technology by electrode slurry even application in substrate surface, thickness is more even everywhere to make electrode layer;
3. possess skills simple, cost is low, is easy to the advantage of large-scale promotion.
In a preferred embodiment of the invention, after step s 5, also comprise: electrode layer described in roll-in and described substrate.Roll-in can make electrode layer and substrate combine more tight.Particularly, 10-100KPa pressure roll can be adopted to press electrode layer and substrate.
In a preferred embodiment of the invention, between described step S3 and step S4, also comprise: form current collection fluid layer in the position of suprabasil default electrode layer.Particularly, the material of the good conductivity such as last layer silver paint can be coated with in the position of suprabasil default electrode layer as current collection fluid layer.
As shown in Figure 3, in a preferred embodiment of the invention, electrode layer can be L shape, rectangle, keyhole, comb finger-type or other the shape that can combine, and specifically can be selected flexibly by technical staff, not repeat herein.It should be noted that, the electrode layer of comb finger-type has remarkable advantage: the first, and comb finger electrodes layer is conducive to positive and negative charge in electrolyte and transmits nearby, improve the transmission rate of charged particle, reduce the interior resistance of capacitor, reduce polarization when being conducive to capacitor charging/discharging, improve energy storage efficiency.The second, these two comb finger electrodes layers intermesh, and make can spray on substrate more equably during coating electrode slurry, the quality uniformity more of final two the comb finger electrodes layers formed.
In a preferred embodiment of the invention, miniature energy storage device is ultracapacitor or lithium ion battery.
Second object of the present invention is to propose that a kind of cost is low, precision good, be easy to the miniature energy storage device electrode of large-scale production.This electrode is obtained by the formation method of above-mentioned miniature energy storage device electrode.
3rd object of the present invention is to propose that a kind of cost is low, precision good, be easy to the formation method of the miniature energy storage device of large-scale production.
As shown in Figure 3, the formation method of the miniature energy storage device of the embodiment of the present invention, comprises the following steps:
A. by the formation method of above-mentioned miniature energy storage device electrode, positive electrode and the negative electrode of miniature energy storage device is prepared.
B. positive pole ear and negative lug is pasted.
Particularly, positive pole ear is connected with positive electrode, and negative lug is connected with negative electrode.Lug can adopt copper adhesive tape etc., and those skilled in the art can select flexibly according to embody rule.
C. between positive electrode and negative electrode, dielectric substrate is formed.
Particularly, those skilled in the art can according to embody rule flexible operating.Such as; can between positive electrode and negative electrode; form the dielectric substrate comprising polyvinyl alcohol/sulfuric acid system, polyvinyl alcohol/Phosphoric Acid, polymethyl methacrylate-ethylene carbonate-lithium perchlorate system, polyethylene glycol oxide-polyethylene glycol-trifluoromethyl sulfonic acid lithium system, polyaniline-1-ethyl-3-methylimidazole tetrafluoroborate-trimethyl silanol system, 1-butyl-3-methylimidazole bis trifluoromethyl sulphonyl heavy curtain acid imide-fumed silica system, 1-butyl-3-methyl imidazolium tetrafluoroborate-fumed silica system, to prepare ultracapacitor or lithium ion battery.
D. encapsulate.
Particularly, the miniature energy storage device assembled is encapsulated.Encapsulate again after can increasing the accessories apparatus such as cover plate if desired.
In one embodiment of the invention, positive electrode and negative electrode can be positioned on same substrate, also can be positioned on different substrate.Particularly, when being positioned on same substrate, can be processed to form positive electrode and negative electrode, technique is simple simultaneously.When being positioned on different substrate, in the final device formed, two pieces of substrates are relative, be separated with other materials layer between both positive and negative polarity and negative electrode, be not easy to cause inter-electrode short-circuit.
According to the formation method of the miniature energy storage device of the embodiment of the present invention, at least tool has the following advantages:
1. its electrode is by miniature mask plate technology, and make electrode material to be complicated meticulous shape, precision is very high, and, by spraying technology by electrode slurry even application in substrate surface, make electrode layer thickness distribution everywhere more even.Therefore, two electrodes can do consistency is good, avoid and cause device performance unstable because of electrode area or quality difference.
2. technology is simple, and cost is low, is easy to large-scale promotion.
4th object of the present invention is to propose that a kind of cost is low, precision good, be easy to the miniature energy storage device of large-scale production.This miniature energy storage device is obtained by the formation method of above-mentioned miniature energy storage device.
For making those skilled in the art understand the present invention better, Fig. 4 shows the basic structure of miniature energy storage device.Wherein, 1 is substrate, and 2 is positive pole colleeting comb, and 3 is negative pole colleeting comb, and 4 is positive electrode, and 5 is negative electrode, and 6 is positive pole ear, and 7 is negative lug, and 8 is dielectric substrate, and 9 is cover plate.
For making those skilled in the art understand the present invention better, introduce the preparation process of the ultracapacitor of the embodiment of the present invention and the forming process of lithium ion battery below in detail.
Example one, ultracapacitor
(1) on polymethyl methacrylate (PMMA) plate of 40mm × 25mm, what etched as shown in Figure 2 at middle position by laser engraving machine combs finger-like hollow part, wherein L1=8mm, L2=1mm, L3=11mm, W=12mm a pair.In this, as the miniature mask plate of ultracapacitor coating electrode.
(2) with dimethyl silicone polymer (PDMS) for substrate, and the preparation of substrate arrange electrode position coating silver paint as electrode colleeting comb.0.1 gram of active carbon powder is dissolved in the absolute ethyl alcohol of 4-6ml, preferred 5ml absolute ethyl alcohol, stirs and carry out ultrasonic 10min, as electrode slurry.
(3) miniature mask plate is placed in substrate.It should be noted that, after placing, the identical rectangular opening of two of the comb finger-like both sides longitudinal arrangement on miniature mask plate should arrange the aligned in position of electrode with the preparation of substrate.
(4) electrode slurry is put into spraying equipment, arranging nozzle diameter is 0.3mm, nozzle is placed in distance substrate 15cm place and carries out atomizing spraying.
(5) miniature mask plate is separated with substrate, through 30min natural drying, substrate defines the comb finger electrode layer of pair of solid.
(6) on the conductive layer that two are brushed with silver paint, copper adhesive tape is pasted respectively as lug.Preferably, two lugs of two comb finger electrode layer correspondences extend in the opposite direction.
(7) between the comb finger electrode sprayed, lateral length 15mm is formed, longitudinal length 15mm, the polyvinyl alcohol/phosphoric acid (PVA/H of thickness 0.2mm
3pO
4) dielectric substrate.
(8) with polyethylene terephthalate (PET) film for cover plate, encapsulating by pasting kapton adhesive tape at basal edge, obtaining ultracapacitor.
Test shows, the performance parameter of this ultracapacitor is: capacitance 5mF, interior resistance 2.1k Ω.
Example two, lithium ion battery
(1) on polymethyl methacrylate (PMMA) plate of 50mm × 50mm, etched the rectangular opening of two parallel 10mm × 4mm at middle position by laser engraving machine, the two is along the direction alignment parallel with minor face, spacing 1mm.
(2) with 60mm × 60mm crystal silicon chip for substrate.Configure slurry in the following manner: get 0.1 gram of cobalt acid lithium, 0.02g conductive black, and 0.3125g Kynoar (PVDF) content is Kynoar/1-METHYLPYRROLIDONE (PVDF/NMP) binder system of 2%, join in 5ml 1-METHYLPYRROLIDONE solvent, sealing stirs and ultrasonic 10min, as anode electrode slurry; Get 0.05g battery special graphite powder, 0.01g conductive black, and 0.156g butadiene-styrene rubber (SBR) content be 2% butadiene-styrene rubber/sodium carboxymethylcellulose (SBR/CMC) solvent be the binder system of water, join in 5ml absolute ethyl alcohol, stir and carry out ultrasonic 10min, as negative electrode slurry.
(3) positive electrode layer is made.Particularly: miniature mask plate is placed in substrate.It should be noted that, after placing, two rectangular openings on miniature mask plate should align with the predeterminated position of suprabasil positive electrode layer and positive electrode layer respectively.Wherein corresponding with positive electrode layer rectangular opening adhesive tape is sealed.Negative electrode slurry is put into spraying equipment, and nozzle diameter is 0.3mm, nozzle is placed in distance substrate 15cm place and carries out atomizing spraying.Substrate and shaping positive electrode layer are placed in baking oven 60 DEG C of dry 30min, substrate defines the negative electrode layer of solid-state rectangle.
(4) positive electrode layer is made.Particularly: the adhesive tape on rectangular opening corresponding with positive electrode layer on miniature mask plate is taken off, and by spraying negative material rectangular opening adhesive tape seal.Anode electrode slurry is put into spraying equipment, and nozzle diameter is 0.3mm, nozzle is placed in distance substrate 15cm place and carries out atomizing spraying.Then miniature mask plate is separated with substrate, substrate defines the anode electrode layer of solid-state rectangle.Substrate and shaping positive and negative electrode layer are put into vacuum drying oven 90 DEG C of dryings 12 hours, puts into the preparation of glove box in order to battery afterwards.
(5) on positive and negative electrode layer, copper adhesive tape is pasted respectively as lug.Preferably, two lugs of positive and negative electrode layer correspondence extend in the opposite direction.
(6) between positive and negative electrode layer, lateral length 10mm is formed, longitudinal length 10mm, the lithium hexafluoro phosphate (LiFP of thickness 0.1mm
6)-ethylene carbonate (EC)-diethyl carbonate (DEC)-aerosil electrolyte system, solidifies 12 hours, obtains dielectric substrate.
(7) be wrapper with aluminum plastic film, encapsulate with sealing machine in glove box, obtain lithium ion battery.
Test shows, the performance parameter of this lithium ion battery is: battery capacity is 3mAh.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.
Claims (14)
1. a formation method for miniature energy storage device electrode, is characterized in that, comprise the following steps:
S1. patterned miniature mask plate is made;
S2. provide substrate, and prepare electrode slurry;
S3. described miniature mask plate is placed in described substrate;
S4. by described electrode slurry atomizing spraying in the described substrate being covered with described miniature mask plate; And
S5. described miniature mask plate is separated with described substrate, after described electrode slurry drying, described substrate forms patterned electrode layer.
2. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, in described step S1, makes described miniature mask plate by laser engraving machine.
3. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, the size range of described miniature mask plate is: length is 1-100mm, and width is 1-100mm, and thickness is 0.1-5mm.
4. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, the material of described miniature mask plate is PETG or polymethyl methacrylate.
5. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, the material of described substrate is PETG, dimethyl silicone polymer, Kynoar, nonwoven fabrics or silicon wafer.
6. the formation method of miniature energy storage device electrode as claimed in claim 1, it is characterized in that, solute in described electrode slurry is one or more the combination in active carbon, graphite powder, carbon nano-tube, Graphene, cobalt acid lithium, lithium nickel cobaltate, LiMn2O4, LiFePO4 or lithium titanate, solvent is water, absolute ethyl alcohol, acetone, ethylene glycol, 1-METHYLPYRROLIDONE, dimethyl formamide, one or more combination of dimethyl sulfoxide (DMSO).
7. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, after described step S5, also comprises: electrode layer described in roll-in and described substrate.
8. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, between described step S3 and step S4, also comprises: the position of default electrode layer on the substrate forms current collection fluid layer.
9. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, described electrode layer is L shape, rectangle, keyhole or comb finger-type.
10. the formation method of miniature energy storage device electrode as claimed in claim 1, is characterized in that, miniature energy storage device is ultracapacitor or lithium ion battery.
11. 1 kinds of miniature energy storage device electrode, is characterized in that, are to be obtained by the formation method according to any one of claim 1-10.
The formation method of 12. 1 kinds of miniature energy storage devices, is characterized in that, comprise the following steps:
A. by the formation method of the miniature energy storage device electrode described in any one of claim 1-10, positive electrode and the negative electrode of miniature energy storage device is prepared;
B. positive pole ear and negative lug is pasted;
C. between described positive electrode and negative electrode, dielectric substrate is formed; And
D. encapsulate.
The formation method of 13. miniature energy storage devices as claimed in claim 12, it is characterized in that, described positive electrode and negative electrode are positioned on same substrate, or are positioned on different substrate.
14. 1 kinds of miniature energy storage devices, is characterized in that, are to be obtained by the formation method described in claim 12 or 13.
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