CN214176071U - High-energy-density multilayer fast ion network structure cathode - Google Patents
High-energy-density multilayer fast ion network structure cathode Download PDFInfo
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- CN214176071U CN214176071U CN202023190561.2U CN202023190561U CN214176071U CN 214176071 U CN214176071 U CN 214176071U CN 202023190561 U CN202023190561 U CN 202023190561U CN 214176071 U CN214176071 U CN 214176071U
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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 relates to the technical field of lithium ion, in particular to a high-energy density multilayer fast ion network structure cathode, which comprises a lithium ion battery cathode current collector, an upper conductive coating, an upper middle graphite coating, an upper fast ion coating, an upper graphite coating, a lower conductive coating, a middle lower graphite coating, a lower fast ion coating and a lower graphite coating, one end face of the lithium ion battery negative current collector is provided with an upper conductive coating, the other end face of the upper conductive coating is provided with an upper middle graphite coating, the utility model utilizes the upper fast ion coating to equally divide the graphite coating into the upper middle graphite coating and the upper graphite coating with the same thickness, the graphite coating is equally divided into a middle graphite coating and a lower graphite coating with the same thickness through the lower fast ion coating, and the original graphite coating is divided into two parts respectively by the negative electrode structure, so that the purpose of improving the energy density and the ion conductivity of the pole piece is achieved.
Description
Technical Field
The utility model relates to a lithium ion technical field specifically is a fast ionic network structure negative pole of high energy density multilayer.
Background
High energy density negative electrodes require high energy density materials and thick coating layers to achieve this, but high energy density materials at the present stage generally have some defects, and the coating can only be used as a small amount of coating due to the defects of the materials in expansion or service life; such as a black phosphorus based composite material, has a theoretical capacity of 2596mAh/g, which is much higher than the theoretical capacity of graphite (372mAh/g), and a true density of 2.69g/cm3, which is greater than 2.22g/cm3 of graphite; the unit cell of the black scale is far larger than that of the graphite, the distance between lithium intercalation reaction channels is 0.43nm and far larger than 0.3354nm of the graphite, and specific use conditions are required; as shown in fig. 2, the thicker the coating thickness, the further the ion migration distance, and thus the ion conductivity of the thick coating layer is weak.
To sum up, the utility model discloses a design the fast ionic network structure negative pole of high energy density multilayer and solve the problem that exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fast ionic network structure negative pole of high energy density multilayer to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a high-energy-density multi-layer fast ion network structure negative electrode comprises a lithium ion battery negative electrode current collector, an upper conductive coating, an upper and middle graphite coating, an upper fast ion coating, an upper graphite coating, a lower conductive coating, a middle and lower graphite coating, a lower fast ion coating and a lower graphite coating, an upper conductive coating is arranged on one end face of the lithium ion battery negative current collector, an upper middle graphite coating is arranged on the other end face of the upper conductive coating, the other end surface of the middle and upper graphite coating is provided with an upper fast ion coating, the other end surface of the upper fast ion coating is provided with an upper graphite coating, the other end surface of the lithium ion battery negative current collector is provided with a lower conductive coating, the other end surface of the lower conductive coating is provided with a middle and lower graphite coating, and a lower fast ion coating is arranged on the other end face of the middle and lower graphite coating, and a lower graphite coating is arranged on the other end face of the lower fast ion coating.
Preferably, the lithium ion battery negative current collector adopts copper foil, and the thickness of the copper foil is 4 um-20 um.
Preferably, the thicknesses of the middle and upper graphite coating, the middle and lower graphite coating and the lower graphite coating are the same and are all 4-20 um.
Preferably, the upper conductive coating and the lower conductive coating have the same thickness and the thickness is 2um to 10 um.
Preferably, the thickness of the upper fast ion coating and the thickness of the lower fast ion coating are the same and both the thicknesses are 2um to 10 um.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses in, equally divide the well middle and upper graphite coating of same thickness, go up graphite coating with graphite coating through the design utilization fast ion coating to and equally divide graphite coating and graphite coating down of same thickness through fast ion coating down, this kind of negative pole structure is divided into two with original graphite coating respectively, can also improve pole piece ion conductivity's purpose when reaching the solution and improving energy density.
Drawings
Fig. 1 is a schematic view of a cross-sectional structure of a negative electrode of the high energy density multilayer fast ion network structure of the present invention;
fig. 2 is a schematic cross-sectional structural view of a negative electrode of a conventional high-energy-density multilayer fast ion network structure.
In the figure: 1. a lithium ion battery negative current collector; 2. an upper conductive coating; 3. coating middle and upper graphite; 4. coating fast ion; 5. coating a graphite coating; 6. a lower conductive coating; 7. a middle and lower graphite coating; 8. coating with fast ion; 9. and (5) coating graphite.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution:
a high-energy-density multilayer fast ion network structure negative electrode comprises a lithium ion battery negative electrode current collector 1, an upper conductive coating 2, an upper and middle graphite coating 3, an upper fast ion coating 4, an upper graphite coating 5, a lower conductive coating 6, a middle and lower graphite coating 7, a lower fast ion coating 8 and a lower graphite coating 9, wherein the upper conductive coating 2 is arranged on one end surface of the lithium ion battery negative electrode current collector 1, the middle and upper graphite coating 3 is arranged on the other end surface of the upper conductive coating 2, the upper fast ion coating 4 is arranged on the other end surface of the upper and middle graphite coating 3, the upper graphite coating 5 is arranged on the other end surface of the upper fast ion coating 4, the lower conductive coating 6 is arranged on the other end surface of the lithium ion battery negative electrode current collector 1, the middle and lower graphite coating 7 is arranged on the other end surface of the lower conductive coating 6, and the lower fast ion coating 8 is arranged on the other end surface of the middle and lower graphite coating 7, and the other end face of the lower fast ion coating 8 is provided with a lower graphite coating 9.
Furthermore, the lithium ion battery negative current collector 1 adopts copper foil, and the thickness of the copper foil is 4 um-20 um.
Further, the thicknesses of the middle and upper graphite coating 3, the upper graphite coating 5, the middle and lower graphite coating 7 and the lower graphite coating 9 are the same and are all 4-20 um.
Further, the upper conductive coating 2 and the lower conductive coating 6 are the same in thickness and both 2um to 10um in thickness.
Further, the thickness of the upper fast ion coating 4 and the thickness of the lower fast ion coating 8 are the same and are both 2um to 10 um.
The utility model discloses work flow: on the basis of fig. 2, the graphite coating is equally divided into the middle and upper graphite coatings 3 and the upper graphite coating 5 with the same thickness through the upper fast ion coating 4, and the middle and lower graphite coatings 7 and the lower graphite coating 9 with the same thickness are equally divided into the graphite coating through the lower fast ion coating 8.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a fast ionic network structure negative pole of high energy density multilayer, includes lithium ion battery negative pole mass flow body (1), goes up conductive coating (2), well middle and upper graphite coating (3), goes up fast ionic coating (4), goes up graphite coating (5), conductive coating (6) down, well lower graphite coating (7), fast ionic coating (8) down and graphite coating (9) down, its characterized in that: be provided with conductive coating (2) on the terminal surface of lithium ion battery negative pole mass flow body (1), be provided with well middle and high graphite coating (3) on another terminal surface of going up conductive coating (2), be provided with fast ion coating (4) on another terminal surface of well middle and high graphite coating (3), be provided with graphite coating (5) on another terminal surface of last fast ion coating (4), be provided with down conductive coating (6) on another terminal surface of lithium ion battery negative pole mass flow body (1), be provided with down graphite coating (7) down on another terminal surface of conductive coating (6) down, be provided with down fast ion coating (8) down on another terminal surface of well down graphite coating (7), be provided with down graphite coating (9) down on another terminal surface of fast ion coating (8) down.
2. The high energy density multi-layer fast ion network structure negative electrode of claim 1, wherein: the lithium ion battery negative current collector (1) adopts a copper foil, and the thickness of the copper foil is 4-20 um.
3. The high energy density multi-layer fast ion network structure negative electrode of claim 1, wherein: the thickness of the middle and upper graphite coating (3), the thickness of the upper graphite coating (5), the thickness of the middle and lower graphite coating (7) and the thickness of the lower graphite coating (9) are the same and are all 4-20 um.
4. The high energy density multi-layer fast ion network structure negative electrode of claim 1, wherein: the upper conductive coating (2) and the lower conductive coating (6) are the same in thickness and both range from 2um to 10um in thickness.
5. The high energy density multi-layer fast ion network structure negative electrode of claim 1, wherein: the thickness of the upper fast ion coating (4) is the same as that of the lower fast ion coating (8), and the thicknesses of the upper fast ion coating and the lower fast ion coating are both 2-10 um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023190561.2U CN214176071U (en) | 2020-12-26 | 2020-12-26 | High-energy-density multilayer fast ion network structure cathode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023190561.2U CN214176071U (en) | 2020-12-26 | 2020-12-26 | High-energy-density multilayer fast ion network structure cathode |
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| CN214176071U true CN214176071U (en) | 2021-09-10 |
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| CN202023190561.2U Active CN214176071U (en) | 2020-12-26 | 2020-12-26 | High-energy-density multilayer fast ion network structure cathode |
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