CN219534557U - Pole piece structure for reducing surface moisture of pole piece and lithium ion battery - Google Patents
Pole piece structure for reducing surface moisture of pole piece and lithium ion battery Download PDFInfo
- Publication number
- CN219534557U CN219534557U CN202223455266.4U CN202223455266U CN219534557U CN 219534557 U CN219534557 U CN 219534557U CN 202223455266 U CN202223455266 U CN 202223455266U CN 219534557 U CN219534557 U CN 219534557U
- Authority
- CN
- China
- Prior art keywords
- pole piece
- coating
- diatom ooze
- moisture
- piece structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 54
- 239000011248 coating agent Substances 0.000 claims abstract description 53
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000011148 porous material Substances 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000011267 electrode slurry Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model belongs to the technical field of battery production and manufacturing, and in particular relates to a pole piece structure for reducing water on the surface of a pole piece and a lithium ion battery, comprising the following components: the pole piece body comprises a current collector and a coating coated on at least part of the surface of the current collector; diatom ooze is sprayed on the surface of the coating; wherein the diatom ooze covers the coating for moisture isolation. According to the utility model, by optimizing the pole piece structure, moisture can be prevented from entering the pole piece.
Description
Technical Field
The utility model belongs to the technical field of battery production and manufacturing, and particularly relates to a pole piece structure for reducing water on the surface of a pole piece and a lithium ion battery.
Background
Along with the progress of technology and the improvement of living standard, the requirement on the energy density of the lithium ion battery is continuously increased, and the high-nickel ternary material with the advantages of high specific capacity and low cost is also widely applied to the lithium ion battery.
However, the high-nickel ternary material is extremely sensitive to environmental humidity, the high-nickel material electrode is easy to absorb water in the preparation process, so that excessive water in the battery is caused, decomposition of electrolyte on the surface of the positive electrode is aggravated, capacity exertion of the battery is affected, and coulombic efficiency is also greatly reduced.
Disclosure of Invention
One of the objects of the present utility model is: aiming at the defects of the prior art, the pole piece structure for reducing the moisture on the surface of the pole piece is provided, and the moisture can be prevented from entering the pole piece by optimizing the pole piece structure.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a pole piece structure for reducing moisture on a pole piece surface, comprising: the pole piece body comprises a current collector and a coating coated on at least part of the surface of the current collector; diatom ooze is sprayed on the surface of the coating; wherein the diatom ooze covers the coating for moisture isolation.
Preferably, the diatom ooze coats the surface of the coating and the edges of the coating.
Preferably, the length of the coating is less than the length of the diatom ooze, and the difference in length between the coating and the diatom ooze is greater than 2mm.
Preferably, the thickness of the diatom ooze is less than the thickness of the coating.
Preferably, the surface area of the diatom ooze is 40-65 m2/g, the pore diameter of the diatom ooze is 50-1000 nm, and the porosity of the diatom ooze is 80-95%.
Preferably, the thickness of the diatom ooze is 5-15 um.
Preferably, the diatom ooze is silicon dioxide, and the content of the silicon dioxide is 40% -70%.
Preferably, both sides of the pole piece body are provided with a blank area and a coating area, the current collector is exposed on the surface of the blank area of the pole piece body, and the diatom ooze is exposed on the surface of the coating area of the pole piece body.
Preferably, one ends of the coating areas on the two sides of the pole piece body overlap, and the length of the coating area on one side of the pole piece body is smaller than or equal to the length of the coating area on the other side of the pole piece body.
The second object of the utility model is to provide a lithium ion battery, which comprises a first pole piece, a diaphragm and a second pole piece, wherein the first pole piece or the second pole piece is of the pole piece structure for reducing the surface moisture of the pole piece, and the first pole piece, the diaphragm and the second pole piece are sequentially overlapped and wound to form a winding core.
The utility model has the beneficial effects that a layer of dense diatom ooze with super-fiber, porous property and strong water absorption is sprayed on the pole piece body, the diatom ooze automatically absorbs water in the air and stores the water in the pores, the probability that the water in the air enters the pole piece is reduced, the pole piece body is prevented from being directly contacted with the water in the air, meanwhile, the chemical state of the diatom ooze in the lithium battery is stable, the diatom ooze cannot react with other substances, and the influence on the performance of the battery is reduced.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the present utility model.
Wherein reference numerals are as follows:
1-a pole piece body; 11-current collector; 12-coating;
2-diatom ooze.
Detailed Description
Certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will appreciate that a hardware manufacturer may refer to the same component by different names. The description and claims do not take the form of an element differentiated by name, but rather by functionality. As used throughout the specification and claims, the word "comprise" is an open-ended term, and thus should be interpreted to mean "include, but not limited to. By "substantially" is meant that within an acceptable error range, a person skilled in the art can solve the technical problem within a certain error range, substantially achieving the technical effect.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The present utility model will be described in further detail below with reference to fig. 1, but is not limited thereto.
Embodiment one
Embodiment one will be described with reference to FIG. 1
A pole piece structure for reducing moisture on a pole piece surface, comprising: the pole piece body 1 comprises a current collector 11 and a coating 12 coated on at least part of the surface of the current collector 11; diatom ooze 2, sprayed on the surface of the coating 12; wherein diatom ooze 2 covers coating 12 for moisture barrier.
Because the high nickel material electrode absorbs water easily in the preparation process, excessive water in the battery is caused, the decomposition of electrolyte on the surface of the positive electrode is aggravated, the capacity exertion of the battery is affected, and simultaneously, the coulomb efficiency is also greatly reduced, therefore, a layer of compact diatom ooze 2 with super-fiber, porous characteristics and strong water absorption is sprayed on the electrode plate body 1, the diatom ooze 2 automatically absorbs water in the air and stores the water in the pores, the probability that the water in the air enters the electrode plate is reduced, the direct contact of the electrode plate body 1 with the water in the air is avoided, meanwhile, the chemical state of the diatom ooze 2 in the lithium battery is stable, the diatom ooze 2 does not react with other substances, and the influence on the performance of the battery is reduced.
In the embodiment, a glue spraying device is added at the tail part of the coating process, diatom ooze 2 is dissolved in glue, spraying is carried out along the vertical direction of the pole piece coating tape, and the diatom ooze 2 is rolled up along with the pole piece, so that spraying is finished. In addition, before the battery is injected with liquid, the diatom ooze 2 is utilized to automatically adjust the humidity, and when the moisture in the environment is reduced and the humidity is reduced, the adsorbed moisture is continuously baked out, so that the baking effect is achieved.
In the pole piece structure for reducing the surface moisture of the pole piece according to the present utility model, the diatom ooze 2 coats the surface of the coating 12 and the edges of the coating 12. Specifically, the length of the coating 12 is less than the length of the diatom ooze 2, and the difference between the length of the coating 12 and the length of the diatom ooze 2 is greater than 2mm, which is understood to mean that the length of the diatom ooze 2 exceeds the length of the coating 12, ensuring that the diatom ooze 2 covers the entire coating 12, including but not limited to the surface of the coating 12 and the edges of the coating 12.
In the pole piece structure for reducing the surface moisture of the pole piece according to the present utility model, the thickness of the diatom ooze 2 is smaller than the thickness of the coating layer 12, preferably, the thickness of the diatom ooze 2 is 5-15 um, for example, the thickness of the diatom ooze 2 is 5um, 6um, 7um, 8um, 9um, 10um, 11um, 12um, 13um, 14um, 15um, so that the excessive thickness of the diatom ooze 2 is avoided, resulting in the increase of the overall cost of the battery.
In the pole piece structure for reducing the surface moisture of the pole piece according to the present utility model, the surface area of the diatom ooze 2 is 40-65 m2/g, the pore diameter of the diatom ooze 2 is 50-1000 nm, the porosity of the diatom ooze 2 is 80% -95%, and furthermore, the void number of the unit volume of the diatom ooze 2 is 5000-6000 times that of the activated carbon.
The working principle of the utility model is as follows:
the diatom ooze 2 with the advantages of being compact, super-fiber, porous and strong in water absorption is sprayed on the pole piece body 1, the diatom ooze 2 automatically absorbs water in the air and is stored in the fine holes, the probability that the water in the air enters the pole piece is reduced, the pole piece body 1 is prevented from being in direct contact with the water in the air, meanwhile, the chemical state of the diatom ooze 2 in the lithium battery is stable, the diatom ooze 2 cannot react with other substances, and the influence on the battery performance is reduced.
Second embodiment
Unlike the first embodiment, the following is: the diatom ooze 2 of the present embodiment is silica, and further contains a small amount of Al2O3, fe2O3, caO, mgO, and the content of silica is 40% to 70%. In addition, a glue spraying device is added before rolling, diatom ooze 2 is dissolved in glue, the diatom ooze 2 is sprayed along the vertical direction of the pole piece rolling tape, and the diatom ooze 2 can be adhered to the surface of the pole piece after rolling, so that the spraying of the diatom ooze 2 is completed.
Other structures are the same as those of the first embodiment, and will not be described here again.
Embodiment III
Unlike the first embodiment, the following is: the two sides of the pole piece body 1 of the embodiment are respectively provided with a blank area and a coating area, the current collector 11 is exposed on the surface of the blank area of the pole piece body 1, the diatom ooze 2 is exposed on the surface of the coating area of the pole piece body 1, one ends of the coating areas of the two sides of the pole piece body 1 are overlapped, and the length of the coating area of one side of the pole piece body 1 is smaller than or equal to that of the coating area of the other side of the pole piece body 1. Specifically, the pole piece body 1 is divided into a first pole piece pole and a second pole piece, the first pole piece and the second pole piece are provided with blank areas and coating areas, the coating areas of the first pole piece are formed by coating positive electrode slurry, the coating areas of the second pole piece are formed by coating negative electrode slurry, the blank areas of the first pole piece are exposed positive electrode current collectors, aluminum foils or other metal materials are preferably adopted, and the blank areas of the second pole piece are exposed negative electrode current collectors, preferably copper foils or other metal materials are adopted. In addition, the positions of the blank areas include, but are not limited to, the blank areas are arranged at the two ends or the center of the pole piece body 1, and the blank areas or the coating areas on the two sides of the pole piece body 1 can be the same or different at any position of the pole piece body 1, so that the normal use of the battery can be satisfied.
Other structures are the same as those of the first embodiment, and will not be described here again.
Lithium ion battery
The utility model comprises the pole piece structure for reducing the surface moisture of the pole piece in the first to third embodiments.
Specifically, the winding core comprises a first pole piece, a diaphragm and a second pole piece, wherein the first pole piece or the second pole piece is of the pole piece structure for reducing the surface moisture of the pole piece, and the first pole piece, the diaphragm and the second pole piece are sequentially overlapped and wound to form the winding core. The polarities of the first pole piece and the second pole piece are opposite, the first pole piece and the second pole piece are mutually overlapped, the first pole piece can be an anode piece, the second pole piece can be a cathode piece, or the first pole piece can be a cathode piece, the second pole piece can be an anode piece, and the limitation is not limited herein. The first pole piece can be a plurality of, and the second pole piece can be a plurality of, and a plurality of first pole pieces and a plurality of second pole pieces are crisscross lamination setting in proper order along same direction, and are provided with the diaphragm between every adjacent first pole piece and the second pole piece to make between first pole piece and the second pole piece electric insulation.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the utility model pertains from the foregoing disclosure and teachings. Therefore, the present utility model is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.
Claims (10)
1. A pole piece structure for reducing moisture on a pole piece surface, comprising:
the pole piece body (1) comprises a current collector (11) and a coating (12) coated on at least part of the surface of the current collector (11);
the diatom ooze (2) is sprayed on the surface of the coating (12);
wherein the diatom ooze (2) covers the coating (12) for moisture insulation.
2. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 1, wherein: the diatom ooze (2) coats the surface of the coating (12) and the edges of the coating (12).
3. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 2, wherein: the length of the coating (12) is smaller than the length of the diatom ooze (2), and the difference between the length of the coating (12) and the length of the diatom ooze (2) is larger than 2mm.
4. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 3, wherein: the thickness of the diatom ooze (2) is smaller than the thickness of the coating (12).
5. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 1, wherein: the surface area of the diatom ooze (2) is 40-65 m < 2 >/g, the pore diameter of the diatom ooze (2) is 50-1000 nm, and the porosity of the diatom ooze (2) is 80-95%.
6. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 1, wherein: the thickness of the diatom ooze (2) is 5-15 um.
7. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 1, wherein: the diatom ooze (2) is silicon dioxide.
8. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 1, wherein: both sides of the pole piece body (1) are provided with a blank area and a coating area, the current collector (11) is exposed on the surface of the blank area of the pole piece body (1), and the diatom ooze (2) is exposed on the surface of the coating area of the pole piece body (1).
9. A pole piece structure for reducing moisture on a pole piece surface as claimed in claim 8, wherein: one ends of the coating areas on two sides of the pole piece body (1) are overlapped, and the length of the coating area on one side of the pole piece body (1) is smaller than or equal to that of the coating area on the other side of the pole piece body (1).
10. A lithium ion battery, comprising: the first pole piece, the diaphragm and the second pole piece are sequentially overlapped and wound to form a winding core, wherein the first pole piece or the second pole piece is of the pole piece structure for reducing the surface moisture of the pole piece according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223455266.4U CN219534557U (en) | 2022-12-23 | 2022-12-23 | Pole piece structure for reducing surface moisture of pole piece and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223455266.4U CN219534557U (en) | 2022-12-23 | 2022-12-23 | Pole piece structure for reducing surface moisture of pole piece and lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219534557U true CN219534557U (en) | 2023-08-15 |
Family
ID=87632070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223455266.4U Active CN219534557U (en) | 2022-12-23 | 2022-12-23 | Pole piece structure for reducing surface moisture of pole piece and lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219534557U (en) |
-
2022
- 2022-12-23 CN CN202223455266.4U patent/CN219534557U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108520985B (en) | Method for prolonging cycle life of zinc battery and application thereof | |
| US20080199781A1 (en) | Method of producing an electrochemical cell and articles produced therefrom | |
| US9312527B2 (en) | Separator having heat resistant insulation layers | |
| US10121607B2 (en) | Ceramic separator for ultracapacitors | |
| CN101807683A (en) | Positive electrode piece, negative electrode piece of lithium ion capacitance battery and manufacture method of two electrode pieces thereof | |
| CN212365996U (en) | Lithium-philic nano/micron-sized three-dimensional composite lithium metal negative plate | |
| CN109216691B (en) | Positive active material, preparation method thereof and lithium battery | |
| KR20100051705A (en) | Metal oxide-coated positive electrode active material, lithium secondary battery, and manufacture method therefor | |
| CN111725511B (en) | Lithium ion secondary battery pole piece and lithium ion secondary battery | |
| CN109817980B (en) | Method for preparing electrode active material of secondary battery and secondary battery containing the same | |
| KR100912788B1 (en) | Electrode Assembly of High Pulse Discharging Property | |
| US20110002085A1 (en) | Electrode for capacitor and electric double layer capacitor having the same | |
| CN115763997A (en) | Winding type battery pole group and lithium ion battery | |
| CN219534557U (en) | Pole piece structure for reducing surface moisture of pole piece and lithium ion battery | |
| CN110416469A (en) | A kind of lithium ion battery composite zeolite diaphragm and its preparation process | |
| CN115799443B (en) | Microporous aluminum foil electrode of sodium ion battery and preparation method thereof | |
| CN209461573U (en) | A kind of positive plate with tab and the polymer Li-ion battery containing the positive plate | |
| CN108604681B (en) | Energy storage electrode and device | |
| CN114784453B (en) | Preparation method of composite diaphragm, composite diaphragm and application | |
| CN116344961A (en) | Diaphragm-free battery cell, preparation method thereof and lithium ion battery | |
| KR20240001248A (en) | Current collector, electrode sheet, and method for preparing the current collector | |
| CN115995351A (en) | Preparation method of transition metal nickel doped manganese dioxide electrode material | |
| WO2022134376A1 (en) | Lithium-ion capacitor negative electrode pole piece, lithium-ion capacitor, and preparation method therefor | |
| JPH1041199A (en) | Manufacture of large-capacity electric double layer capacitor | |
| CN114976472A (en) | Aerogel battery diaphragm and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |