CN210074028U - Multi-layer electrode based on mass transfer reduction and diffusion control and energy storage equipment - Google Patents
Multi-layer electrode based on mass transfer reduction and diffusion control and energy storage equipment Download PDFInfo
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- CN210074028U CN210074028U CN201920469461.1U CN201920469461U CN210074028U CN 210074028 U CN210074028 U CN 210074028U CN 201920469461 U CN201920469461 U CN 201920469461U CN 210074028 U CN210074028 U CN 210074028U
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- 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
Abstract
The utility model discloses at first a multilayer electrode based on reduce mass transfer and diffusion control, including the multilayer thin layer electrode, be equipped with the electrically conductive film that can ionic conduction and electron be electrically conductive simultaneously between two adjacent thin layer electrodes, these two adjacent thin layer electrodes are connected through electrically conductive film is electrically conductive, and the thickness of thin layer electrode satisfies: l is less than or equal to k delta; wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness. The utility model also discloses an energy storage equipment based on reduce mass transfer and diffusion control multilayer electrode. The electrodes are arranged into the multilayer thin-layer electrodes, so that the number of thin-layer electrodes which are charged and discharged simultaneously can be increased, the specific surface area can be effectively increased, and the energy storage capacity can be increased; in addition, the thickness of the thin-layer electrode is limited by the thickness of the diffusion control layer, so that reaction molecules or ions and the like are not controlled by the mass transfer rate in the electrode or the mass transfer rate is greatly improved, the specific power of the energy storage device is improved, and the utilization rate of the porous electrode is greatly improved.
Description
Technical Field
The utility model relates to an energy storage equipment technical field, specific be a multilayer electrode and energy storage equipment based on reduce mass transfer and diffusion control.
Background
The conventional lithium ion battery includes a positive electrode, a negative electrode, and a separator, and an electrolyte is disposed between the positive electrode and the negative electrode. According to the charge-discharge principle of the lithium ion battery, the following characteristics are found: the charge and discharge process of the lithium ion battery is the process of lithium ion intercalation and deintercalation. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon as the negative electrode has a layered structure having many pores, and lithium ions reaching the negative electrode are inserted into the pores of the carbon layer, and the more lithium ions are inserted, the higher the charge capacity is. Similarly, when the battery is discharged, lithium ions embedded in the negative carbon layer are extracted and move back to the positive electrode. The more lithium ions returned to the positive electrode, the higher the discharge capacity. The lithium battery discharge needs to pay attention to several points: first, the discharge current cannot be excessive, and excessive current may cause heat generation inside the battery, resulting in permanent damage. Second, absolutely no over-discharge! The internal storage of electric energy in lithium batteries is realized by an electrochemical reversible chemical change, and an irreversible reaction of the chemical change can be caused by excessive discharge, so that the lithium batteries are most afraid of over-discharge and can possibly cause the rejection of the batteries once the discharge voltage is lower than 2.7V.
In the charging and discharging process of the lithium ion battery, only the surfaces of holes with certain depths of the positive electrode and the negative electrode are in contact with electrolyte to generate the insertion and the extraction of lithium ions, and the materials of the positive electrode and the negative electrode cannot completely participate in the insertion and the extraction of the lithium ions, which is also the reason for the small charging and discharging current of the existing lithium ion battery, not only limits the charging and discharging capacity of the lithium ion battery, but also limits the charging and discharging power of the battery.
Disclosure of Invention
In view of this, the utility model aims at providing a multilayer electrode and energy storage equipment based on reduce mass transfer and diffusion control can reduce the influence of mass transfer and diffusion control to charge-discharge, improves charge-discharge rate to can improve specific surface area, increase energy storage capacity.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model discloses at first provide a multilayer electrode based on reduce mass transfer and diffusion control, including multilayer thin layer electrode, adjacent two be equipped with simultaneously ion conduction and the electrically conductive thin film of electron between the thin layer electrode, this adjacent two the thin layer electrode passes through electrically conductive thin film is electrically conductive to be connected, just the thickness of thin layer electrode satisfies:
L≤kδ
wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
Further, the thickness of the thin-layer electrode is more than or equal to 1 nm.
Further, the thickness of the thin-layer electrode satisfies: l is less than or equal to 10 delta.
Further, the thickness of the thin-layer electrode satisfies: l is less than or equal to 5 delta.
Further, the thickness of the thin-layer electrode satisfies: l is less than or equal to 2 delta.
Further, the thickness of the thin-layer electrode satisfies: l is less than or equal to delta.
Further, the conductive film is made of a porous conductive material which allows an electrolyte to pass through so as to achieve ion conduction and exchange.
Further, the conductive film is made of, but not limited to, porous carbon, graphite, graphene, reduced graphene or polyaniline.
Further, the thickness of the conductive film satisfies:
L0≤kδ
wherein L is0Is the thickness of the conductive film; k is a coefficient, and k is more than or equal to 1; delta is the thickness of the diffusion control layer。
Further, the thickness of the conductive film is 1nm or more.
Further, the thickness of the conductive film satisfies: l is0≤10δ
Further, the thickness of the conductive film satisfies: l is0≤5δ。
Further, the thickness of the conductive film satisfies: l is0≤2δ。
Further, the thickness of the conductive film satisfies: l is0≤δ。
Further, the diffusion control layer has a thickness of:
wherein δ is the diffusion control layer thickness; d is a diffusion coefficient; t is time.
The utility model also provides an energy storage equipment based on reduce mass transfer and diffusion control multilayer electrode, including the diaphragm of electronic insulation and accessible ion, the both sides of diaphragm are equipped with the electrode respectively, the electrode adopts as above multilayer electrode based on reduce mass transfer and diffusion control.
Further, the separator is a battery separator; the electrodes positioned on two sides of the battery diaphragm are respectively a positive electrode and a negative electrode, a positive current collector in conductive connection with the positive electrode is arranged on the positive electrode, and a negative current collector in conductive connection with the negative electrode is arranged on the negative electrode.
Further, the positive electrode comprises positive thin-layer electrodes arranged at intervals, and the conductive film arranged between two adjacent layers of the positive thin-layer electrodes is a positive conductive film;
the negative electrode comprises negative thin-layer electrodes arranged at intervals, and the conductive film arranged between two adjacent layers of the negative thin-layer electrodes is a negative conductive film.
Further, the positive thin-layer electrode and the negative thin-layer electrode are parallel to the battery diaphragm, the positive thin-layer electrode is a porous positive thin-layer electrode capable of guiding electrolyte to the positive conductive film, and the negative thin-layer electrode is a porous negative thin-layer electrode capable of guiding electrolyte to the negative conductive film.
Further, all the positive conductive films are in conductive connection with the positive current collector, and all the negative conductive films are in conductive connection with the negative current collector.
Further, the positive thin-layer electrode and the negative thin-layer electrode are perpendicular to the battery diaphragm.
Further, all the positive conductive films are in conductive connection with the positive current collector, and all the negative conductive films are in conductive connection with the negative current collector.
Further, the positive thin-layer electrode is made of a lithium ion battery positive electrode material, and the negative thin-layer electrode is made of a lithium ion battery negative electrode material.
Furthermore, the two electrodes are respectively positioned on two sides of the diaphragm, wherein the thin-layer electrode of one electrode is made of a battery anode material or an electrode cathode material, and the thin-layer electrode of the other electrode is made of a capacitance electrode material.
The beneficial effects of the utility model reside in that:
the utility model discloses energy storage equipment based on reduce mass transfer and diffusion control multilayer electrode, through setting up the electrode as multilayer thin layer electrode, so, electrolyte enters conductive film after respectively with the surface contact of thin layer electrode, namely all thin layer electrode's surface all can participate in battery charge-discharge reaction, the quantity of the thin layer electrode of multiplicable simultaneous charge-discharge can effectively improve specific surface area, increase energy storage capacity; in addition, the thickness of the thin-layer electrode is limited by the thickness of the diffusion control layer, so that the influence of mass transfer and diffusion control on charging and discharging can be reduced, reaction molecules or ions and the like are not controlled by the mass transfer rate in the electrode or the mass transfer rate is greatly improved, the specific power of the energy storage device is improved, and the utilization rate of the porous electrode is greatly improved.
Drawings
In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a following figure explains:
fig. 1 is a schematic structural diagram of an embodiment 1 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrodes according to the present invention;
FIG. 2 is a schematic structural diagram of an embodiment 2 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrodes according to the present invention;
fig. 3 is a schematic structural diagram of an energy storage device embodiment 3 based on mass transfer reduction and diffusion control multilayer electrodes according to the present invention;
fig. 4 is a schematic structural diagram of an embodiment 4 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrode of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Example 1
Fig. 1 is a schematic structural diagram of an embodiment 1 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrode according to the present invention. The energy storage device comprises an ion-conductive but electronically-insulated diaphragm, electrodes are respectively arranged on two sides of the diaphragm, and the electrodes adopt multilayer electrodes based on mass transfer reduction and diffusion control. This embodiment is based on multilayer electrode that reduces mass transfer and diffusion control includes the thin layer electrode of multilayer, is equipped with the electrically conductive film that can realize ionic conduction and electron conduction simultaneously between two adjacent thin layer electrodes, and this two adjacent thin layer electrodes pass through electrically conductive film conductive connection, and the thickness of thin layer electrode satisfies:
L≤kδ
wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
Specifically, the thickness of the thin-layer electrode in this embodiment is greater than or equal to 1nm, and the thickness of the thin-layer electrode satisfies: l is less than or equal to 10 delta; preferably, the thickness of the thin-layer electrode satisfies: l is less than or equal to 5 delta. Preferably, the thickness of the thin-layer electrode satisfies: l is less than or equal to 2 delta. Preferably, the thickness of the thin-layer electrode satisfies: l is less than or equal to delta. The thickness of the thin-layer electrode is smaller than or equal to that of the diffusion control layer, so that the influence of mass transfer or diffusion control can be eliminated or reduced, the specific power of the energy storage device is improved, and the utilization rate of the porous electrode is greatly improved.
Further, the conductive film is made of a porous conductive material that allows an electrolyte to pass therethrough, thereby achieving ion conduction and exchange. The conductive film is made of, but not limited to, porous carbon, graphite, graphene, reduced graphene or polyaniline, and the conductive film of this embodiment is made of graphene. And the thickness of the conductive film satisfies: l is0K delta is less than or equal to k delta; wherein L is0Is the thickness of the conductive film; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness. Specifically, the thickness of the conductive film is greater than or equal to 1nm, and the thickness of the conductive film satisfies the following conditions: l is010 δ, preferably, the thickness of the conductive film satisfies: l is0Less than or equal to 5 delta; preferably, the thickness of the conductive film satisfies: l is02 δ, preferably, the thickness of the conductive film satisfies: l is0Delta is less than or equal to delta. The thickness of the conductive film of the embodiment is less than or equal to that of the diffusion control layer, so that the influence of mass transfer or diffusion control can be eliminated or reduced.
Further, the diffusion control layer thickness is:
wherein δ is the diffusion control layer thickness; d is a diffusion coefficient; t is time.
Further, the diaphragm is a battery diaphragm 1; the electrodes on two sides of the battery diaphragm 1 are respectively a positive electrode and a negative electrode, the positive electrode is provided with a positive current collector 2 which is in conductive connection with the positive electrode, and the negative electrode is provided with a negative current collector 3 which is in conductive connection with the negative electrode. The positive electrode of the embodiment comprises a plurality of positive thin-layer electrodes 4 arranged at intervals, and the conductive film arranged between two adjacent positive thin-layer electrodes 4 is a positive conductive film 5. The negative electrode of the embodiment comprises a plurality of layers of negative thin-layer electrodes 6 arranged at intervals, and the conductive film arranged between two adjacent layers of negative thin-layer electrodes 6 is a negative conductive film 7.
Further, the positive thin-layer electrode 4 and the negative thin-layer electrode 6 of the present embodiment are both parallel to the battery diaphragm 1, the positive thin-layer electrode 4 is provided with a porous positive thin-layer electrode capable of guiding the electrolyte to the positive conductive film, and the negative thin-layer electrode 6 is a porous negative thin-layer electrode capable of guiding the electrolyte to the negative conductive film.
Further, the positive thin-layer electrode 4 is made of a positive electrode material of a lithium ion battery, and the negative thin-layer electrode 6 is made of a negative electrode material of the lithium ion battery, that is, the energy storage device of the embodiment is a lithium battery.
In the energy storage device for controlling the multilayer electrode based on mass transfer reduction and diffusion, the electrode is set to be the multilayer thin-layer electrode, so that the electrolyte enters the conductive film and then is respectively contacted with the surface of the thin-layer electrode, namely, the surfaces of all the thin-layer electrodes participate in the charge-discharge reaction of the battery, the number of the thin-layer electrodes which are charged and discharged simultaneously can be increased, the specific surface area can be effectively increased, and the energy storage capacity can be increased; in addition, the thickness of the thin-layer electrode is limited by the thickness of the diffusion control layer, so that the influence of mass transfer and diffusion control on charging and discharging can be reduced, reaction molecules or ions and the like are not controlled by the mass transfer rate in the electrode or the mass transfer rate is greatly improved, the specific power of the energy storage device is improved, and the utilization rate of the porous electrode is greatly improved.
Example 2
Fig. 2 is a schematic structural diagram of an embodiment 2 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrode according to the present invention. The energy storage device comprises an ion-conductive but electronically-insulated diaphragm, electrodes are respectively arranged on two sides of the diaphragm, and the electrodes adopt multilayer electrodes based on mass transfer reduction and diffusion control. This embodiment multilayer electrode based on reduce mass transfer and diffusion control includes multilayer thin layer electrode, is equipped with the electrically conductive film that can realize ionic conduction and electron conduction simultaneously between two adjacent thin layer electrodes, and these two adjacent thin layer electrodes pass through electrically conductive film conductive connection, and the thickness of thin layer electrode satisfies:
L≤kδ
wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
Further, the diaphragm is a battery diaphragm 1; the electrodes on two sides of the battery diaphragm 1 are respectively a positive electrode and a negative electrode, the positive electrode is provided with a positive current collector 2 which is in conductive connection with the positive electrode, and the negative electrode is provided with a negative current collector 3 which is in conductive connection with the negative electrode. The positive electrode of the embodiment comprises a plurality of positive thin-layer electrodes 4 arranged at intervals, and the conductive film arranged between two adjacent positive thin-layer electrodes 4 is a positive conductive film 5. The negative electrode of the embodiment comprises a plurality of layers of negative thin-layer electrodes 6 arranged at intervals, and the conductive film arranged between two adjacent layers of negative thin-layer electrodes 6 is a negative conductive film 7.
Further, all the positive conductive films 5 are in conductive connection with the positive current collector through the wiring bridge 8, and all the negative conductive films 7 are in conductive connection with the negative current collector through the wiring bridge 9.
Other structures of this embodiment are the same as those of embodiment 1, and are not described in detail.
Example 3
Fig. 3 is a schematic structural diagram of an embodiment 3 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrode according to the present invention. The energy storage device comprises an ion-conductive but electronically-insulated diaphragm, electrodes are respectively arranged on two sides of the diaphragm, and the electrodes adopt multilayer electrodes based on mass transfer reduction and diffusion control. This embodiment multilayer electrode based on reduce mass transfer and diffusion control includes multilayer thin layer electrode, is equipped with the electrically conductive film that can realize ionic conduction and electron conduction simultaneously between two adjacent thin layer electrodes, and these two adjacent thin layer electrodes pass through electrically conductive film conductive connection, and the thickness of thin layer electrode satisfies:
L≤kδ
wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
Further, the diaphragm is a battery diaphragm 1; the electrodes on two sides of the battery diaphragm 1 are respectively a positive electrode and a negative electrode, the positive electrode is provided with a positive current collector 2 which is in conductive connection with the positive electrode, and the negative electrode is provided with a negative current collector 3 which is in conductive connection with the negative electrode. The positive electrode of the embodiment comprises positive thin-layer electrodes 4 arranged at intervals, and the conductive film arranged between two adjacent positive thin-layer electrodes 4 is a positive conductive film 5. The negative electrode of the embodiment comprises negative thin-layer electrodes 6 arranged at intervals, and the conductive film arranged between two adjacent layers of the negative thin-layer electrodes 6 is a negative conductive film 7.
Further, the positive thin-layer electrode 5 and the negative thin-layer electrode 7 are perpendicular to the battery diaphragm 1, all the positive conductive films 5 are in conductive connection with the positive current collector 2, and all the negative conductive films 7 are in conductive connection with the negative current collector 3.
Other structures of this embodiment are the same as those of embodiment 1, and are not described in detail.
Example 4
Fig. 3 is a schematic structural diagram of an embodiment 3 of the energy storage device based on mass transfer reduction and diffusion control multilayer electrode according to the present invention. The energy storage device comprises an ion-conductive but electronically-insulated diaphragm, electrodes are respectively arranged on two sides of the diaphragm, and the electrodes adopt multilayer electrodes based on mass transfer reduction and diffusion control. This embodiment multilayer electrode based on reduce mass transfer and diffusion control includes multilayer thin layer electrode, is equipped with the electrically conductive film that can realize ionic conduction and electron conduction simultaneously between two adjacent thin layer electrodes, and these two adjacent thin layer electrodes pass through electrically conductive film conductive connection, and the thickness of thin layer electrode satisfies:
L≤kδ
wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
Specifically, the thickness of the thin-layer electrode in this embodiment is greater than or equal to 1nm, and the thickness of the thin-layer electrode satisfies: l is less than or equal to 10 delta; preferably, the thickness of the thin-layer electrode satisfies: l is less than or equal to 5 delta. Preferably, the thickness of the thin-layer electrode satisfies: l is less than or equal to 2 delta. Preferably, the thickness of the thin-layer electrode satisfies: l is less than or equal to delta. The thickness of the thin-layer electrode is smaller than or equal to that of the diffusion control layer, so that the influence of mass transfer or diffusion control can be eliminated, the specific power of the energy storage device is improved, and the utilization rate of the porous electrode is greatly improved.
Further, the conductive film is made of, but not limited to, porous carbon, graphite, graphene, reduced graphene, or polyaniline, and the conductive film of this embodiment is made of graphene. And the thickness of the conductive film satisfies: l is0K delta is less than or equal to k delta; wherein L is0Is the thickness of the conductive film; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
Further, the thickness of the conductive film is more than or equal to 1nm, and the thickness of the conductive film satisfies the following condition: l is010 δ, preferably, the thickness of the conductive film satisfies: l is0Less than or equal to 5 delta; preferably, the thickness of the conductive film satisfies: l is02 δ, preferably, the thickness of the conductive film satisfies: l is0Delta is less than or equal to delta. The thickness of the conductive film of the embodiment is less than or equal to that of the diffusion control layer, so that the influence of mass transfer or diffusion control effect can be eliminated or reduced.
Further, the diffusion control layer thickness is:
wherein δ is the diffusion control layer thickness; d is a diffusion coefficient; t is time.
Further, in the present embodiment, the two electrodes on the two sides of the separator 10 are made of different electrode materials, and the thin-layer electrode 11 of one electrode is made of a battery positive electrode material or an electrode negative electrode material, and the thin-layer electrode 12 of the other electrode is made of a capacitor electrode material. In the embodiment, a conductive film 13 is arranged between two adjacent thin-layer electrodes 11 of one electrode, and a conductive film 14 is arranged between two adjacent thin-layer electrodes 11 of the other electrode. The energy storage device of the present embodiment is a hybrid energy storage device.
Both the thin-layer electrode 11 and the thin-layer electrode 12 of the present embodiment are parallel to the separator 10, and of course, the thin-layer electrode 11 and the thin-layer electrode 12 may be arranged perpendicular to the separator 10, which will not be described in detail.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (23)
1. A multi-layer electrode based on reduced mass transfer and diffusion control, characterized by: the conductive thin film which can conduct ions and electrons simultaneously is arranged between two adjacent thin layer electrodes, the two adjacent thin layer electrodes are in conductive connection through the conductive thin film, and the thicknesses of the thin layer electrodes meet the following requirements:
L≤kδ
wherein L is the thickness of the thin-layer electrode; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
2. The multilayer electrode based on reduced mass transfer and diffusion control of claim 1, wherein: the thickness of the thin-layer electrode is greater than or equal to 1 nm.
3. The multilayer electrode based on reduced mass transfer and diffusion control of claim 1, wherein: the thickness of the thin-layer electrode satisfies the following conditions: l is less than or equal to 10 delta.
4. The multilayer electrode based on reduced mass transfer and diffusion control of claim 3, wherein: the thickness of the thin-layer electrode satisfies the following conditions: l is less than or equal to 5 delta.
5. The multi-layer electrode based on reduced mass transfer and diffusion control of claim 4, wherein: the thickness of the thin-layer electrode satisfies the following conditions: l is less than or equal to 2 delta.
6. The multi-layer electrode based on reduced mass transfer and diffusion control of claim 5, wherein: the thickness of the thin-layer electrode satisfies the following conditions: l is less than or equal to delta.
7. The multilayer electrode based on reduced mass transfer and diffusion control of claim 1, wherein: the conductive film is made of porous conductive material which allows electrolyte to pass through so as to realize ion conduction and exchange.
8. The multilayer electrode based on reduced mass transfer and diffusion control of claim 1, wherein: the conductive film is made of, but not limited to, porous carbon, graphite, graphene, reduced graphene or polyaniline.
9. The multilayer electrode based on reduced mass transfer and diffusion control of claim 1, wherein: the thickness of the conductive film satisfies:
L0≤kδ
wherein L is0Is the thickness of the conductive film; k is a coefficient, and k is more than or equal to 1; δ is the diffusion control layer thickness.
10. The multi-layer electrode based on reduced mass transfer and diffusion control of claim 9, wherein: the thickness of the conductive film is greater than or equal to 1 nm.
11. The multi-layer electrode based on reduced mass transfer and diffusion control of claim 10, wherein: the thickness of the conductive film satisfies: l is0≤10δ。
12. The multi-layer electrode based on reduced mass transfer and diffusion control of claim 11, wherein: the thickness of the conductive film satisfies: l is0≤5δ。
13. The multi-layer electrode based on reduced mass transfer and diffusion control of claim 12, wherein: the thickness of the conductive film satisfies: l is0≤2δ。
14. The reducing-based of claim 13A mass transfer and diffusion controlled multilayer electrode characterized by: the thickness of the conductive film satisfies: l is0≤δ。
15. The multilayer electrode based on reduced mass transfer and diffusion control according to any one of claims 1 to 14, wherein: the thickness of the diffusion control layer is as follows:
wherein δ is the diffusion control layer thickness; d is a diffusion coefficient; t is time.
16. An energy storage device based on multi-layer electrodes for mass transfer reduction and diffusion control, comprising an ion-conducting but electronically-insulating membrane, the two sides of which are provided with electrodes, respectively, characterized in that: the electrode adopts a multilayer electrode based on mass transfer reduction and diffusion control as described in any one of claims 1 to 15;
the diaphragm is a battery diaphragm; the electrodes positioned on two sides of the battery diaphragm are respectively a positive electrode and a negative electrode, a positive current collector in conductive connection with the positive electrode is arranged on the positive electrode, and a negative current collector in conductive connection with the negative electrode is arranged on the negative electrode.
17. The reduced mass transfer and diffusion control multilayer electrode-based energy storage device of claim 16, wherein: the positive electrode comprises a plurality of layers of positive thin-layer electrodes arranged at intervals, and the conductive film arranged between two adjacent layers of the positive thin-layer electrodes is a positive conductive film;
the negative electrode comprises a plurality of layers of negative thin-layer electrodes arranged at intervals, and the conductive film arranged between two adjacent layers of the negative thin-layer electrodes is a negative conductive film.
18. The mass transfer and diffusion reduced control multilayer electrode-based energy storage device of claim 17, wherein: the positive thin-layer electrode and the negative thin-layer electrode are parallel to the battery diaphragm, the positive thin-layer electrode adopts a porous positive thin-layer electrode which can guide electrolyte to the positive conductive film, the negative thin-layer electrode adopts a porous negative thin-layer electrode which can guide electrolyte to the negative conductive film, and the deionized migration and exchange of the positive electrode and the negative electrode are realized.
19. The reduced mass transfer and diffusion control multilayer electrode-based energy storage device of claim 18, wherein: all the positive conductive films are in conductive connection with the positive current collector, and all the negative conductive films are in conductive connection with the negative current collector.
20. The mass transfer and diffusion reduced control multilayer electrode-based energy storage device of claim 17, wherein: the positive thin-layer electrode and the negative thin-layer electrode are perpendicular to the battery diaphragm.
21. The mass transfer and diffusion reduced control multilayer electrode-based energy storage device of claim 20, wherein: all the positive conductive films are in conductive connection with the positive current collector, and all the negative conductive films are in conductive connection with the negative current collector.
22. The reduced mass transfer and diffusion control multilayer electrode-based energy storage device of any one of claims 16-21, wherein: the positive thin-layer electrode is made of a positive electrode material of the lithium ion battery, and the negative thin-layer electrode is made of a negative electrode material of the lithium ion battery.
23. The reduced mass transfer and diffusion control multilayer electrode-based energy storage device of claim 16, wherein: and the two electrodes are respectively positioned at two sides of the diaphragm, wherein the thin-layer electrode of one electrode is made of a battery anode material or an electrode cathode material, and the thin-layer electrode of the other electrode is made of a capacitance electrode material.
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| WO2020207363A1 (en) * | 2019-04-08 | 2020-10-15 | 青岛九环新越新能源科技股份有限公司 | Multilayer electrode based on mass transfer reduction and diffusion control, and an energy storage device |
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| WO2020207363A1 (en) * | 2019-04-08 | 2020-10-15 | 青岛九环新越新能源科技股份有限公司 | Multilayer electrode based on mass transfer reduction and diffusion control, and an energy storage device |
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