CN208706458U - The electrode structure of electrochemical energy storage device - Google Patents
The electrode structure of electrochemical energy storage device Download PDFInfo
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- CN208706458U CN208706458U CN201821227284.8U CN201821227284U CN208706458U CN 208706458 U CN208706458 U CN 208706458U CN 201821227284 U CN201821227284 U CN 201821227284U CN 208706458 U CN208706458 U CN 208706458U
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- current
- collector
- storage device
- energy storage
- electrode
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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 provides a kind of electrode structure of electrochemical energy storage device, comprising: a current-collector；It is coated on the electrode material on the surface of current-collector, the electrode material is a kind of electroactive material；And at least one perforation, penetrate described in electrode material and current-collector.The perforation structure that the utility model passes through electrode structure, enhance the ion transport ability of electrolyte in all directions in electrochemical energy storage device, the charging and discharging efficiency under different charging and discharging rates can be improved, combine the electrode material for being coated on current-collector that can improve during high current density is charged and discharged by above-mentioned perforation and react with electrolyte ion to obtain high power density.
Description
Technical field
The utility model relates to a kind of construction of electrochemical energy storage device, especially a kind of electrode of electrochemical energy storage device
Construction.
Background technique
In recent years, electrochemical energy storage device (EESDs), such as lithium ion battery (LIBs), lithium-sulphur (Li-S) battery and super
Capacitor (SCs) has been widely used for electric vehicle (electric vehicles, EVs), hybrid electric vehicle
(hybrid electric vehicles, HEVs), plug-in hybrid electric vehicle (plug-in hybrid
Electric vehicles, PHEVs), Wireless Power Tools, wireless power source is supplied and other electric power storage systems.Electrochemistry
Although energy storage device achieves major progress by studying and improveing for many years, its energy resource density (energy
Density), power density (power density) and service life are still difficult to meet the requirements.As wearable electronics is set
Standby fast development, there is an urgent need to research and develop flexible, light, high-energy density electrochemical energy storage device.
Lithium ion battery is mainly made of anode, cathode, electrolyte and isolation film.In general, electrode includes two parts: electricity
Pole material and current-collector (current collector).Key reaction when electrode material is electrochemical energy storage device charge and discharge
Heap, in electrochemical reaction process therefore they can transmit electronics by current-collector, and current-collector is for completing current loop
Material basic attachment.Influence of the electrolyte to battery system performance is very big, it will have wider electrochemical window, good
Chemical stability and higher ionic conductance.
Electrochemical reaction (electrochemical reaction) is that electronics passes through metal-electrolyte solution interface when institute
The chemical change of generation, when electrolyte is embedded in electrode material, resistance of the power density of lithium ion battery by electrochemical reaction
Hinder.In this step, coulombic efficiency (coulombic efficiency) is decayed simultaneously.In addition, resistance increase and often it is adjoint
Lead to the raised heat of temperature.Principle based on electrochemical reaction, the interface between electrode and electrolyte need to enhance, to reduce
Unnecessary electrochemical reaction, while also improving efficiency.
The energy density of lithium ion battery depends primarily on its output voltage and specific capacity, and the height of voltage and specific capacity
Low determined by electrode material and electrolyte electrochemical performance, especially in terms of the selection of electrode material, is had countless
Researcher has put into a large amount of energy for developing advanced electrode material.
Published United States Patent (USP) 20040191632A1 proposes a kind of current-collector (BATTERY with graphite bubble
INCLUDING CARBON FOAM CURRENT COLLECTORS), the current-collector with graphite bubble includes hole grid,
A large amount of surface area can be provided.It is this to enhance the energy density that will affect lead-acid storage battery system, power density and life.Institute
The current-collector stated includes thin rectangular body and pull ring (tab) other than hole grid, and carbon foam includes providing for carbon foam
The net of the construction package of support.
Published United States Patent (USP) 20130065122A1 proposes a kind of semisolid electrode battery with porous current collector
And its manufacturing method (SEMI-SOLID ELECTRODE CELL HAVING A POROUS CURRENT COLLECTOR AND
METHOD OF MANUFACTURE).The porous current collector wherein proposed can form wire mesh and can be including metal
With any suitable material of nonmetallic materials.This porous current collector enhance electrochemical cell energy density and power it is close
Degree.
Published U.S. Patent No. 20130252091A1 proposes the electrode and its manufacturing method of a kind of lithium ion battery
(LITHIUM ION BATTERY ELECTRODE AND ITS FABRICATION METHOD) is applied in lithium ion battery
The current-collector with porous three-dimensional network.Current-collector improves the utilization rate of electrode active material and obtains high area density
With low electrode impedance.
Published United States Patent (USP) 20110070489A1 proposes a kind of netted battery structure of controlled porosity
(RETICULATED AND CONTROLLED POROSITY BATTERY STRUCTURES), including can be meshing or have
The device of the component at netted interface allows to increase interface zone.Increased interface perimeter increases ionic species reaction
Site can be used.The amount of reaction site allows ionic species from electrolyte diffusion to surface, and wherein electrolyte is solid and ion
Substance is Li+.
Published United States Patent (USP) 20140186700A1 proposes a kind of by advanced high power prepared by coextrusion printing
With battery electrode (ADVANCED, HIGH POWER AND ENERGY the BATTERY ELECTRODE of high-energy
MANUFACTURED BY CO-EXTRUSION PRINTING), including the electrode material for forming hole channel, the hole
Cave channel plays the key effect for promoting the slot (sink) or source (source) of lithium ion movement.When lithium ion is from another material
When material is displaced through hole channel, these hole channels lead to the path channel of shorter and less complications.This allows using thicker
Electrode.Obtained cathode has high power and volume energy density.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of electrode structures of electrochemical energy storage device.
In order to solve the above technical problems, a kind of embodiment of the electrode structure of the utility model electrochemical energy storage device,
It include: a current-collector；It is coated on the electrode material on the surface of current-collector, the electrode material is a kind of electroactive material；And
At least one perforation, penetrates the electrode material and current-collector.
The preferred structure of electrode structure as the utility model electrochemical energy storage device, including multiple perforation.
Wherein current-collector is made of metal or nonmetallic materials.
The electroactive material includes: lithium metal or lithium alloys, class graphite material, metal oxide, sulfide and nitrogen
Compound is therein any.
The beneficial effect of the electrode structure of the utility model electrochemical energy storage device is, passes through the perforation knot of electrode structure
Structure, the weight accounting that can obtain following advantage and effect (1) current-collector reduce；(2) increase guarantor's liquid measure of electrolyte, favorably
In the raising of cycle life；(3) adhesive force of electroactive material sum aggregate appliance chamber increases；(4) pliability of current-collector improves:
(5) enhance the ion transport ability of electrolyte in all directions in electrochemical energy storage device, the migration of ion in the electrolytic solution
Improved efficiency, the selectable path of transition process increases, and the charging and discharging under different charging and discharging rates can be improved
Efficiency；And combine the electrode material for being coated on current-collector that can be charged and discharged the phase in high current density by above-mentioned perforation
Between improve and react with electrolyte ion to obtain high power density.
The detailed content of other effects and embodiment in relation to the utility model, cooperation schema are described as follows.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of the electrode structure of the utility model electrochemical energy storage device；
Fig. 2 is the step flow chart of the manufacturing method of the electrode structure of the utility model electrochemical energy storage device；
Fig. 3 is a kind of application schematic diagram of the electrode structure of the utility model electrochemical energy storage device；
Fig. 4 is another application schematic diagram of the electrode structure of the utility model electrochemical energy storage device.
Symbol description
10 current-collector, 20 electrode material
30 perforation 40 isolation film, 50 electrolyte
Specific embodiment
Positional relationship described in embodiment below, comprising: on, under, left and right, if being all without specializing
On the basis of the direction that component in schema is painted.
It is the structural schematic diagram of the electrode structure of the utility model electrochemical energy storage device referring initially to Fig. 1.This is practical
The electrode structure of model electrochemical energy storage device substantially can be used as the anode or cathode of electrochemical energy storage device, this is practical new
The electrode structure of type includes: a current-collector 10 (current collector)；It is coated on the electrode material on the surface of current-collector
20, electrode material 20 is a kind of electroactive material on surface for being coated on current-collector 10, to the process work in electrochemical reaction
For the current circuit of charging and discharging；And at least one perforation 30, perforate 30 through electrode materials 20 and current-collector 10, preferably
Embodiment is to form multiple perforation 30, these perforation 30 can be arranged by the way of array, these perforation 30 facilitate electricity
The ion transport ability of electrolyte in all directions in chemical reaction process, can be improved under different charging and discharging rates
It is charged and discharged efficiency.
The concrete application of the electrochemical energy storage device is as such as electrochemical cell (electrochemical
Cell) and electrochemical capacitor (electrochemical capacitor), typical electrochemical energy storage device such as lithium-ion electric
Pond (lithium-ion battery) and lithium-ion capacitor (lithium-ion capacitor)；Further, there is this
Utility model propose electrode structure electrochemical energy storage device, be suitably applied electric vehicle (electric vehicles,
EVs), hybrid electric vehicle (hybrid electric vehicles, HEVs), plug-in hybrid electric vehicle
(plug-in hybrid electric vehicles, PHEVs), Wireless Power Tools, wireless power source supply and others electricity
Power stocking system.
Referring to Fig. 2, be the step flow chart of the manufacturing method of the electrode structure of the utility model electrochemical energy storage device,
It include: to prepare a current-collector 10；In the surface coating electrode material 20 of current-collector 10, the electrode material 20 is a kind of electroactive
Material, one of embodiment are the slurries for first preparing electrode material 20, and the slurry of electrode material 20 is uniformly coated to
The surface of current-collector 10, then uniform coating structure is formed on the surface of current-collector 10 by drying process/technique；And it is formed
At least one perforation 30 penetrates the electrode material 20 and current-collector 10, and one of embodiment is to pass through punching
(punching) technique forms the perforation 30.
The other embodiment of above-mentioned manufacturing step, comprising: the perforation 30 is first formed in ready current-collector 10,
Then electrode material 20 is coated on to the current-collector 10 for being formed with perforation 30 again.
Wherein collector plate is made of metal (such as aluminium based metal) or nonmetallic materials, and current-collector can be paillon or net
The construction of shape.The electroactive material includes: lithium metal or lithium alloys, class graphite material, metal oxide, sulfide and nitrogen
Compound is therein any.Such as the positive electrode of lithium battery is generally with LiMn2O4 (LiMn2O4), LiFePO4 (LiFePO4)、
Nickel cobalt lithium (LiNiCOO2) three kinds be main material.The negative electrode material of lithium battery is divided into graphite system mainly based on carbon material
With coke system.Combined by above-mentioned perforation 30 electrode material 20 for being coated on current-collector 10 can charge in high current density and
It improves during electric discharge and reacts with electrolyte ion to obtain high power density.
Referring to Fig. 3, being a kind of application schematic diagram of the electrode structure of the utility model electrochemical energy storage device, in figure
It is shown, the utility model proposes electrode structure stepped construction, two in office adjacent electrode structures are assembled into a manner of being laminated
It is placed in isolation film 40 between making, then the electrode structure of multilayer is placed in electrolyte 50, is then encapsulated into Soft Roll (soft together
Pack) or Hard Roll (soft pack) is constructed to such as lithium ion battery or lithium-ion capacitor.Similarly, this is practical new
The electrode structure of type electrochemical energy storage device also can be applied to the lithium ion battery of column packing forms (see Fig. 4).
By the structure of the perforation 30 of electrode structure, the weight that can obtain following advantage and effect (1) current-collector is accounted for
Than reducing；(2) the guarantor's liquid measure for increasing electrolyte 50, is conducive to the raising of cycle life；(3) between electroactive material and current-collector 10
Adhesive force increase；(4) pliability of current-collector 10 improves: (5) enhance the electrolyte or electrolyte in electrochemical energy storage device
Ion transport ability in all directions, the improved efficiency of migration of the ion in electrolyte 50, the selectable road of transition process
Diameter increases, and the charging and discharging efficiency under different charging and discharging rates can be improved；And it is combined by above-mentioned perforation 30
Be coated on current-collector 10 electrode material 20 can be improved during high current density is charged and discharged it is anti-with electrolyte ion
It should be to obtain high power density.
Embodiment described above and/or embodiment are only the preferable realities to illustrate to realize the utility model technology
Example and/or embodiment are applied, not the embodiment of the utility model technology is made any form of restriction, any this field
Technical staff, in the range for not departing from technological means disclosed in the content of the present invention, when can make a little change or modification
For other equivalent embodiments, but still it should be regarded as technology identical with the utility model in essence or embodiment.
Claims (4)
1. a kind of electrode structure of electrochemical energy storage device characterized by comprising a current-collector；It is coated on the current-collector
The electrode material on surface, the electrode material are a kind of electroactive materials；And at least one perforation, which penetrates the electrode material
With the current-collector.
2. the electrode structure of electrochemical energy storage device as described in claim 1, which is characterized in that, should including multiple perforation
A little perforation are arranged in a manner of array.
3. the electrode structure of electrochemical energy storage device as described in claim 1, which is characterized in that the current-collector is metal or non-
Metal material is made.
4. the electrode structure of electrochemical energy storage device as described in claim 1, which is characterized in that the electroactive material includes:
Lithium metal or lithium alloys, class graphite material, metal oxide, sulfide and nitride are therein any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821227284.8U CN208706458U (en) | 2018-08-01 | 2018-08-01 | The electrode structure of electrochemical energy storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821227284.8U CN208706458U (en) | 2018-08-01 | 2018-08-01 | The electrode structure of electrochemical energy storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208706458U true CN208706458U (en) | 2019-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821227284.8U Expired - Fee Related CN208706458U (en) | 2018-08-01 | 2018-08-01 | The electrode structure of electrochemical energy storage device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021084A1 (en) * | 2022-07-29 | 2024-02-01 | 宁德时代新能源科技股份有限公司 | Plate preparation method, plate preparation device, plate, electrode assembly, battery cell, battery and electric device |
-
2018
- 2018-08-01 CN CN201821227284.8U patent/CN208706458U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024021084A1 (en) * | 2022-07-29 | 2024-02-01 | 宁德时代新能源科技股份有限公司 | Plate preparation method, plate preparation device, plate, electrode assembly, battery cell, battery and electric device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190405 Termination date: 20210801 |