CN114497439B - Negative plate and battery comprising same - Google Patents
Negative plate and battery comprising same Download PDFInfo
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- CN114497439B CN114497439B CN202210015457.4A CN202210015457A CN114497439B CN 114497439 B CN114497439 B CN 114497439B CN 202210015457 A CN202210015457 A CN 202210015457A CN 114497439 B CN114497439 B CN 114497439B
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- coating area
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- 239000011248 coating agent Substances 0.000 claims abstract description 59
- 238000000576 coating method Methods 0.000 claims abstract description 59
- 239000003792 electrolyte Substances 0.000 claims abstract description 26
- 230000001502 supplementing effect Effects 0.000 claims abstract description 17
- 239000011149 active material Substances 0.000 claims abstract description 16
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims description 15
- 239000006258 conductive agent Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000007773 negative electrode material Substances 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 2
- NRJJZXGPUXHHTC-UHFFFAOYSA-N [Li+].[O--].[O--].[O--].[O--].[Zr+4].[La+3] Chemical compound [Li+].[O--].[O--].[O--].[O--].[Zr+4].[La+3] NRJJZXGPUXHHTC-UHFFFAOYSA-N 0.000 claims description 2
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 claims description 2
- 229910021385 hard carbon Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 229910021384 soft carbon Inorganic materials 0.000 claims description 2
- 230000010287 polarization Effects 0.000 abstract description 4
- 239000007791 liquid phase Substances 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 11
- 229910052744 lithium Inorganic materials 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000001556 precipitation Methods 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000006183 anode active material Substances 0.000 description 5
- 239000002033 PVDF binder Substances 0.000 description 4
- 239000011267 electrode slurry Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000006256 anode slurry Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 230000022131 cell cycle Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920005553 polystyrene-acrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
- H01M2300/0071—Oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention provides a negative plate and a battery comprising the same, wherein the negative plate comprises a current collector, a first coating area and a second coating area, wherein the first coating area is arranged on at least one side surface of the current collector, and the second coating area is connected with the first coating area and is positioned at the periphery of the first coating area; an active material layer is arranged in the first coating area; the electrolyte supplementing layer is arranged in the second coating area, the electrolyte supplementing layer comprises solid electrolyte, the use of the negative electrode plate improves the cycle performance of the battery under the condition of high multiplying power, through electrochemical theory calculation, the concentration of Li + at the edge of the electrode plate is low in the electrode plate, liquid phase polarization is affected, and in the invention, li + is consumed at the supplementing edge by coating the electrolyte supplementing layer at the edge area (namely the second coating area), the problem that the concentration polarization of Li + at the edge of the electrode plate is high is solved, and the edge dynamic performance is improved.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a negative plate and a battery comprising the negative plate.
Background
With the development of lithium ion secondary batteries, consumers have increasingly demanded charge speed, endurance time and safety performance. However, with the increase of the charging speed, the lithium precipitation at the edge of the negative electrode is easy to occur under the condition of high-rate charging.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a negative plate and a battery comprising the negative plate, and the negative plate can solve the problem of edge lithium precipitation caused by insufficient concentration of liquid phase Li + at the edge of the plate.
The invention aims at realizing the following technical scheme:
A negative electrode sheet including a current collector, a first coating region disposed on at least one side surface of the current collector, and a second coating region connected to the first coating region and located at the periphery of the first coating region;
an active material layer is arranged in the first coating area;
An electrolyte supplementing layer is arranged in the second coating area, and the electrolyte supplementing layer comprises solid electrolyte.
According to the embodiment of the invention, the electrolyte supplementing layer is arranged in the second coating area, so that consumed Li + can be provided, and the problem that the concentration polarization of Li + in the edge area of the pole piece (namely the second coating area) is large is solved.
According to an embodiment of the present invention, the solid-state electrolyte is a garnet-type solid-state electrolyte. Illustratively, the garnet-type solid-state electrolyte is selected from doped or undoped lithium lanthanum zirconium oxide electrolytes, wherein the doping element is selected from at least one of Al, ga, fe, ge, ca, ba, sr, Y, nb, ta, W, sb elements; preferably, the garnet-type solid electrolyte is selected from at least one of Li7-mLa3Zr2-mTamO12（0≤m≤0.6）、Li7-yLa3Zr2-yNbyO12（0≤y≤0.6） and Li 6.4-pLa3Zr2- pTapAl0.2O12 (0.2. Ltoreq.p.ltoreq.0.5), and illustratively, the garnet-type solid electrolyte is selected from Li 7La3Zr2O12 (LLZO).
According to an embodiment of the present invention, the active material layer includes a negative electrode active material.
According to an embodiment of the present invention, the negative electrode active material is selected from one or more of graphite, hard carbon, soft carbon, silicon oxygen compound, and silicon carbon compound.
According to an embodiment of the present invention, the particle diameter Dv50 of the negative electrode active material is 5 μm to 25 μm, for example, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, 25 μm, or any point value in the range of two-point values.
According to the embodiment of the invention, the area ratio of the first coating area to the second coating area is 100 (0.5-5).
According to the embodiment of the invention, the width of the first coating area is 10 mm-250 mm.
According to an embodiment of the present invention, the width of the second coating region is 0.5mm to 10mm, preferably 1mm to 3mm.
In the present invention, the second coating region is located at the periphery of the first coating region, the second coating region is substantially the edge region of the negative electrode sheet, and the width of the second coating region refers to the difference between the width of the current collector and the width of the first coating region, that is, the sum of the widths of the edge regions located at both sides of the first coating region, as shown in fig. 1.
According to an embodiment of the present invention, the thickness of the electrolyte supplementary layer and the thickness of the active material layer are the same or different.
According to an embodiment of the present invention, the thickness of the active material layer is 10 μm to 50 μm.
According to an embodiment of the present invention, the electrolyte supplementary layer has a thickness of 10 μm to 50 μm.
According to an embodiment of the present invention, the active material layer further includes a first conductive agent and a first binder.
According to an embodiment of the present invention, the electrolyte supplementary layer further includes a second conductive agent and a second binder.
According to an embodiment of the present invention, the first conductive agent and the second conductive agent are the same or different and are independently selected from at least one of conductive carbon black, acetylene black, ketjen black, conductive graphite, conductive carbon fiber, carbon nanotube, metal powder.
According to an embodiment of the present invention, the first binder and the second binder are the same or different and are independently selected from at least one of Styrene Butadiene Rubber (SBR), polyvinylidene fluoride (PVDF), polyacrylonitrile, polystyrene-acrylate, polyacrylate.
According to the embodiment of the invention, the active material layer comprises the following components in percentage by mass: 90-99 wt% of negative electrode active material, 0.5-10 wt% of first conductive agent and 0.5-10 wt% of first binder.
Preferably, the active material layer comprises the following components in percentage by mass:
92-99 wt% of negative electrode active material, 0.5-4 wt% of first conductive agent and 0.5-4 wt% of first binder.
According to the embodiment of the invention, the electrolyte supplementing layer comprises the following components in percentage by mass: 70-99wt% of solid electrolyte, 0.5-10 wt% of second conductive agent and 0.5-20 wt% of second binder.
Preferably, the electrolyte supplementing layer comprises the following components in percentage by mass:
80-99 wt% of solid electrolyte, 0.5-10 wt% of second conductive agent and 0.5-15 wt% of second binder.
The invention also provides a preparation method of the negative plate, which comprises the following steps:
1) Preparing a slurry for forming an active material layer and a slurry for forming an electrolyte supplementing layer respectively;
2) And coating the slurry for forming the active material layer and the slurry for forming the electrolyte supplementing layer on the two side surfaces of the current collector by using a double-layer coating machine, wherein the electrolyte supplementing layer is coated on a first coating area, and the active material layer is coated on a second coating area which is connected with the first coating area and is positioned at the periphery of the first coating area, so that the negative electrode plate is prepared.
The invention also provides a battery, which comprises the negative plate.
The invention has the beneficial effects that:
The invention provides a negative plate and a battery comprising the negative plate, the use of the negative plate improves the cycle performance of the battery under the condition of high multiplying power, and through electrochemical theory calculation, the concentration of Li + at the edge of the electrode plate is low to influence liquid phase polarization.
Drawings
Fig. 1 is a schematic structural view of a negative plate according to a preferred embodiment of the present invention;
reference numerals: 1 is a first coated region; 2 is the second coated area.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It is to be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the invention. All techniques implemented based on the above description of the invention are intended to be included within the scope of the invention.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; the reagents, materials, etc. used in the examples described below are commercially available unless otherwise specified.
Example 1
(1) Preparing a negative electrode slurry by using graphite as a negative electrode active material: according to the mass ratio of 96.8% of the anode active material, 1.2% of the conductive agent (conductive carbon black) and 2% of the binder (styrene-butadiene rubber), mixing and stirring the mixture to obtain active material layer slurry, wherein the viscosity of the slurry is 2000-5000 mPa.s, and the solid content is 40-50%.
(2) 80Wt% of garnet-type solid electrolyte LLZO, 5wt% of conductive carbon black and 15wt% of polyvinylidene fluoride are mixed, and N-methyl pyrrolidone is added to be stirred and dispersed to prepare slurry, namely electrolyte supplementing layer slurry.
(3) Simultaneously coating the above slurries prepared by (1) and (2) on a current collector, wherein a negative electrode slurry is coated on a middle portion of the current collector to form a first coating region; coating an electrolyte supplementing layer on a second coating area which is connected with the first coating area and is positioned at the periphery of the first coating area; the coating of both sides of the current collector was done in the same way. In the negative electrode sheet after coating, drying and rolling, the width of the first coating region was 80mm, and the width of the second coating region was 3mm.
(4) Mixing an anode active material (lithium cobaltate), a conductive agent (conductive carbon black) and a binder (PVDF) according to a mass ratio of 96:2.5:1.5, dispersing in N-methyl pyrrolidone (NMP), uniformly stirring to prepare slurry, wherein the viscosity of the slurry is 2000-7000 mPas, the solid content is 70% -80%, uniformly coating the slurry on the two side surfaces of an anode current collector aluminum foil, and baking at 100-150 ℃ for 4-8 hours to prepare the anode sheet.
(5) Rolling, die cutting and cutting the positive and negative electrode sheets, winding and assembling to form a winding core, packaging with an aluminum plastic film after short circuit test is qualified, baking in an oven to remove water until the water content reaches the water content standard required by liquid injection, injecting electrolyte, aging for 24-48h, and completing primary charging by a hot-press formation process to obtain the activated battery.
Examples 2 to 4
Examples 2 to 4 are different from example 1 in that the width of the first coating region and the width of the second coating region are different, and the anode active material is different, as shown in table 1.
Comparative example 1
Other operations are the same as in example 1, except that the negative electrode sheet is:
Preparing a negative electrode slurry by using graphite as a negative electrode active material: according to the mass ratio of 96.8% of the anode active material, 1.2% of the conductive agent (conductive carbon black) and 2% of the binder (styrene-butadiene rubber), mixing and stirring the mixture to prepare anode slurry, wherein the viscosity of the slurry is 2000-5000 mPas and the solid content is 40-50%.
The negative electrode slurry prepared above was coated on both sides of a current collector. In the negative electrode sheet after coating, drying and rolling, the width of the coated region was 83mm.
Comparative example 2
Comparative example 2 differs from comparative example 1 in that the anode active material is different, as shown in table 1.
Performance test:
The cells prepared in the above examples and comparative examples were charged at 3C rate and discharged at 1C rate for cycle life testing for 700 weeks, and the cell cycle retention rate was tested.
The battery cells prepared in the above examples and comparative examples were fully charged at 5C, discharged at 0.5C, and the lithium-eluting condition was checked by dissecting the battery cells after 20 times of charging and discharging.
Table 1 composition and performance test results of the batteries of examples and comparative examples
| Negative electrode active material | First coated area width/mm | Second coated area width/mm | 700T cycle capacity retention rate | Edge lithium evolution condition | |
| Example 1 | Graphite | 80 | 3 | 86.5% | No lithium precipitation |
| Example 2 | Graphite | 82 | 1 | 85.2% | No lithium precipitation |
| Example 3 | 97% Graphite+3% silicon oxide | 80 | 3 | 83.6% | No lithium precipitation |
| Example 4 | 97% Graphite+3% silicon oxide | 82 | 1 | 83.3% | No lithium precipitation |
| Comparative example 1 | Graphite | 83 | 0 | 78.5% | Edge lithium precipitation |
| Comparative example 2 | 97% Graphite+3% silicon oxide | 83 | 0 | 77.2% | No lithium precipitation |
The results of the above examples show that examples 1-4 prepared according to the present invention solve the problems of cell lithium precipitation and cycle capacity retention rate relative to comparative examples 1-2 in a conventional manner.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A negative electrode sheet, characterized in that the negative electrode sheet comprises a current collector, a first coating area arranged on at least one side surface of the current collector, and a second coating area connected with the first coating area and positioned at the periphery of the first coating area; the second coating area is an edge area of the negative electrode sheet;
an active material layer is arranged in the first coating area;
An electrolyte supplementing layer is arranged in the second coating area;
The active material layer comprises a negative electrode active material, a first conductive agent and a first binder, wherein the active material layer comprises the following components in percentage by mass: 90-99 wt% of negative electrode active material, 0.5-10 wt% of first conductive agent and 0.5-10 wt% of first binder;
The electrolyte supplementing layer comprises solid electrolyte, a second conductive agent and a second binder, wherein the mass percentage of the components is as follows: 70-99wt% of solid electrolyte, 0.5-10 wt% of second conductive agent and 0.5-20 wt% of second binder;
The area ratio of the first coating area to the second coating area is 100 (0.5-5), and the area ratio does not comprise 100:5;
The width of the first coating area is 10 mm-250 mm, and the width of the second coating area is 0.5 mm-10 mm.
2. The negative electrode sheet according to claim 1, wherein the solid electrolyte is a garnet-type solid electrolyte selected from doped or undoped lithium lanthanum zirconium oxide electrolytes, wherein the doping element is selected from at least one of Al, ga, fe, ge, ca, ba, sr, Y, nb, ta, W, sb elements.
3. The negative electrode sheet of claim 2, wherein the garnet-type solid state electrolyte is selected from at least one of Li7- mLa3Zr2-mTamO12、Li7-yLa3Zr2-yNbyO12 and Li 6.4-pLa3Zr2-pTapAl0.2O12, wherein 0.ltoreq.m.ltoreq. 0.6,0.ltoreq.y.ltoreq. 0.6,0.2.ltoreq.p.ltoreq.0.5.
4. The negative electrode sheet according to claim 1, wherein the negative electrode active material is selected from one or more of graphite, hard carbon, soft carbon, silicon oxygen compound, and silicon carbon compound.
5. The negative electrode sheet according to claim 4, wherein the particle diameter Dv50 of the negative electrode active material is 5 μm to 25 μm.
6. The negative electrode sheet according to claim 1, wherein the thickness of the active material layer is 10 μm to 50 μm;
and/or the thickness of the electrolyte supplementing layer is 10-50 microns.
7. A battery comprising the negative electrode sheet of any one of claims 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109616612A (en) * | 2018-12-05 | 2019-04-12 | 珠海格力电器股份有限公司 | A kind of electrode and lithium ion battery |
| CN112993233A (en) * | 2021-02-20 | 2021-06-18 | 昆山宝创新能源科技有限公司 | Lithium supplement material of lithium ion battery and preparation method and application thereof |
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| JP2003092092A (en) * | 2001-09-18 | 2003-03-28 | Matsushita Electric Ind Co Ltd | Secondary battery and its manufacturing method |
| JP2007103129A (en) * | 2005-10-03 | 2007-04-19 | Geomatec Co Ltd | Thin film solid secondary battery and method of manufacturing thin film solid secondary battery |
| JP7046185B2 (en) * | 2018-07-18 | 2022-04-01 | 本田技研工業株式会社 | Positive electrode for solid-state battery, method for manufacturing positive electrode for solid-state battery, and solid-state battery |
| CN109713215B (en) * | 2018-12-25 | 2022-03-11 | 深圳市倍特力电池有限公司 | Lithium-supplement negative plate, preparation method thereof and lithium ion battery |
| JP7274300B2 (en) * | 2019-02-14 | 2023-05-16 | 日産自動車株式会社 | All-solid battery |
| CN112086621B (en) * | 2020-09-29 | 2021-07-06 | 珠海冠宇电池股份有限公司 | Negative plate and laminated lithium ion battery comprising same |
| CN112310343A (en) * | 2020-11-02 | 2021-02-02 | 珠海冠宇电池股份有限公司 | Negative plate and lithium ion battery containing same |
| CN113764667B (en) * | 2021-08-12 | 2023-07-14 | 浙江锋锂新能源科技有限公司 | Lithium supplementing functional electrolyte membrane for solid lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109616612A (en) * | 2018-12-05 | 2019-04-12 | 珠海格力电器股份有限公司 | A kind of electrode and lithium ion battery |
| CN112993233A (en) * | 2021-02-20 | 2021-06-18 | 昆山宝创新能源科技有限公司 | Lithium supplement material of lithium ion battery and preparation method and application thereof |
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