CN113451581A - Negative plate and lithium ion battery comprising same - Google Patents
Negative plate and lithium ion battery comprising same Download PDFInfo
- Publication number
- CN113451581A CN113451581A CN202110786612.8A CN202110786612A CN113451581A CN 113451581 A CN113451581 A CN 113451581A CN 202110786612 A CN202110786612 A CN 202110786612A CN 113451581 A CN113451581 A CN 113451581A
- Authority
- CN
- China
- Prior art keywords
- negative electrode
- additive
- negative
- active material
- electrode sheet
- 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.)
- Pending
Links
Images
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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
-
- 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
-
- 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
Abstract
The invention provides a negative plate and a lithium ion battery comprising the same. In the invention, when the negative electrode slurry is prepared, the additive, the negative electrode active material, the conductive agent and the binder are added into the negative electrode slurry together, and the negative electrode sheet containing the additive can be prepared after coating. The additive has a porous structure or has conductive Li+Can be adsorbed on the surface of the negative active material, and the introduction of the additive can significantly increase the Li content of the negative plate+The transmission channel improves the dynamic performance of the negative pole piece, reduces polarization and prevents the performance deterioration of the pole piece. The lithium ion battery obtained by the method does not lose energy density, and can meet the requirement of quick charge.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a negative plate and a lithium ion battery comprising the same.
Background
In recent years, lithium ion batteries have been widely used in the fields of smart phones, tablet computers, smart wearing, electric tools, electric automobiles, and the like. With the acceleration of life rhythm and the development of electronic products, the demands of consumers on shortening the charging time of the lithium ion battery and improving the energy density of the lithium ion battery are more urgent.
The lithium ion battery needs to reduce the coating thickness of the pole piece, shorten the migration distance of lithium ions and improve the migration rate of the lithium ions in order to realize the purpose of quick charge. However, in order to meet the requirement of high energy density of the battery cell, the thickness of the pole piece is generally required to be increased, which is in contradiction with the reduction of the thickness of the pole piece for realizing quick charge. Therefore, how to increase the energy density of the lithium ion battery while achieving fast charge is urgently needed to be solved.
Disclosure of Invention
In order to solve the problem that the energy density and the charging speed of a lithium ion battery in the prior art cannot be considered at the same time, the invention provides a negative plate and the lithium ion battery comprising the same. The invention introduces an additive into the negative plate, wherein the additive has a porous structure or has conductive Li+Can be adsorbed on the surface of the negative active material, and the introduction of the additive can significantly increase the Li content of the negative plate+The transmission channel improves the dynamic performance of the negative plate. The lithium ion battery obtained by the method does not lose energy density, and can meet the requirement of quick charge.
The purpose of the invention is realized by the following technical scheme:
a negative plate comprises a negative current collector and a negative active material layer coated on one side or two sides of the negative current collector, wherein the negative active material layer comprises a negative active material, a conductive agent, a binder and an additive, and the additive is selected from a material with a porous structure and/or conductive Li+A substance of competence.
According to the present invention, the additive is selected from at least one of a metallic inorganic substance, a solid electrolyte and a porous substance.
According to the invention, the particle size range of the additive is: d10<0.5μm，D50<2μm，D90<5 μm; the selection of the additive with the particle size range can increase the pores of the negative plate, achieve the effect of increasing ion channels and achieve the purpose of improving the migration rate of lithium ions.
According to the invention, the additive has a specific surface area of>30m2(ii)/g; the selection of the additive with the specific surface area can increase the contact surface between particles, achieve the effect of increasing ion channels and achieve the purpose of improving the migration rate of lithium ions.
According to the invention, the additive also has the characteristic of resisting 4.55V voltage, so that the additive can not generate oxidation-reduction reaction in the charging and discharging processes, not only can increase the ion channel of the negative plate, but also does not influence the normal operation of the battery.
According to the invention, the metal inorganic substance is selected from at least one of metal oxide, metal hydroxide, metal carbonate and the like, such as at least one of aluminum oxide, magnesium oxide, aluminum hydroxide, aluminum oxyhydroxide, magnesium hydroxide, zirconium hydroxide and the like.
According to the invention, the solid electrolyte is selected from one or more of perovskite-type electrolytes, anti-perovskite-type electrolytes, Garnet-type (Garnet) -type electrolytes, NASICON-type electrolytes and LISICON-type electrolytes.
Wherein the perovskite electrolyte is Li3xLa2/3-xTiO3Wherein, 0.04<x<0.17。
Wherein the anti-perovskite electrolyte is Li3-n(OHn) Cl (n is more than or equal to 0.83 and less than or equal to 2) and Li3-n’(OHn’) At least one of Br (1. ltoreq. n' 2).
Wherein the garnet-type electrolyte is selected from doped or undoped lithium lanthanum zirconium oxide electrolyte, wherein the doped element is selected from at least one of Al, Ga, Fe, Ge, Ca, Ba, Sr, Y, Nb, Ta, W and Sb; preferably, the garnet-type electrolyte is selected from Li7-mLa3Zr2-mTamO12(0≤m≤0.6)、Li7-yLa3Zr2-yNbyO12(0. ltoreq. y. ltoreq.0.6) andLi6.4- pLa3Zr2-pTapAl0.2O12(0.2. ltoreq. p. ltoreq.0.5).
Wherein the NASICON type electrolyte is selected from Li1+x’Ti2-x’Mx’(PO4)3、Li1+x”Ge2-x”Mx”(PO4)3Wherein x' is not less than 0.2 and not more than 0.5, x is not less than 0.2 and not more than 0.5, and M is Al, Cr, Ga, Fe, Sc, In, Lu, Y or La; more preferably, selected from Li1+x’Ti2-x’Alx’(PO4)3(LATP) or Li1+x”Ge2-x”Alx”(PO4)3(LAGP), wherein x' is more than or equal to 0.2 and less than or equal to 0.5, and x is more than or equal to 0.4 and less than or equal to 0.5.
Wherein the LISICON type electrolyte is Li4-rGe1-rPrS4(0.3<r<0.7, for example 0.4 or 0.6).
According to the present invention, the porous substance is selected from at least one of conductive carbon black, ketjen black, conductive fiber, conductive polymer, acetylene black, carbon nanotube, graphene, and flake graphite.
According to the invention, the porosity of the porous mass is greater than or equal to 50%.
According to the invention, the negative electrode active material layer comprises the following components in percentage by mass: 85-98.9 wt% of negative electrode active material, 0.5-5 wt% of conductive agent, 0.5-5 wt% of binder and 0.1-5 wt% of additive.
Illustratively, the content of the negative electrode active material is 85 wt%, 86 wt%, 87 wt%, 88 wt%, 89 wt%, 90 wt%, 91 wt%, 92 wt%, 93 wt%, 94 wt%, 95 wt%, 96 wt%, 97 wt%, 98 wt%, or 98.9 wt% based on the total mass of the negative electrode active material layer.
Illustratively, the content of the conductive agent is 0.5 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, or 5 wt% of the total mass of the anode active material layer.
Illustratively, the additive is present in an amount of 0.1 wt%, 0.15 wt%, 0.25 wt%, 0.55 wt%, 0.65 wt%, 0.70 wt%, 0.75 wt%, 0.85 wt%, 0.90 wt%, 1.0 wt%, 1.2 wt%, 1.5 wt%, 2 wt%, 3 wt%, 4 wt%, or 5 wt% based on the total mass of the anode active material layer. When the additive content is more than 5 wt%, that is, the additive content is too high, the negative electrode active material is reduced, and the energy density of the battery is reduced; when the additive content is less than 0.1 wt%, that is, the additive content is too low, the additive has less influence on the channel and does not significantly improve the migration rate of lithium ions.
Illustratively, the content of the binder is 0.5 wt%, 1 wt%, 2 wt%, 3 wt%, 4 wt%, or 5 wt% of the total mass of the anode active material layer.
According to the present invention, the anode active material is selected from a silicon-based material and/or a carbon-based material.
Wherein the carbon-based material is selected from at least one of artificial graphite, natural graphite, hard carbon, soft carbon, mesophase microspheres, fullerene and graphene.
Wherein the silicon-based material is selected from at least one of nano silicon, SiOx (0< x <2), aluminum-silicon alloy, magnesium-silicon alloy, borosilicate alloy, phosphorus-silicon alloy and lithium-silicon alloy.
According to the invention, the conductive agent comprises one or more of conductive carbon black, Ketjen black, conductive fibers, conductive polymers, acetylene black, carbon nanotubes, graphene, flake graphite, conductive oxides and metal particles.
According to the invention, the binder is selected from at least one of polyvinylidene fluoride and its copolymer derivative, polytetrafluoroethylene and its copolymer derivative, polyacrylic acid and its copolymer derivative, polyvinyl alcohol and its copolymer derivative, polystyrene-butadiene rubber and its copolymer derivative, polyimide and its copolymer derivative, polyethyleneimine and its copolymer derivative, polyacrylate and its copolymer derivative, and sodium carboxymethylcellulose and its copolymer derivative.
According to the present invention, the thickness of the anode active material layer (the thickness of the one-sided anode active material layer after roll pressing) is 10 μm to 150 μm, preferably 30 μm to 100 μm, such as 10 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm or 150 μm.
The invention also provides a preparation method of the negative plate, which comprises the following steps:
uniformly mixing a solvent, a negative electrode active material, a conductive agent, a binder and an additive to prepare negative electrode slurry; and coating the negative electrode slurry on the surface of the negative electrode current collector, and drying to obtain the negative electrode sheet.
According to the invention, the negative electrode slurry contains 100-300 parts by mass of a solvent, 85-98.9 parts by mass of a negative electrode active material, 0.5-5 parts by mass of a conductive agent, 0.1-5 parts by mass of an additive and 0.5-5 parts by mass of a binder.
According to the invention, the solvent is selected from at least one of water, acetonitrile, benzene, toluene, xylene, acetone, tetrahydrofuran, hydrofluoroether, N-methylpyrrolidone.
According to the present invention, the negative electrode slurry is preferably sieved, for example, 200 mesh.
According to the invention, the drying temperature is 70-110 ℃, and the drying time is 12-36 hours.
The invention also provides a lithium ion battery which comprises the negative plate.
The invention has the beneficial effects that:
the invention provides a negative plate and a lithium ion battery comprising the same. In the invention, when the negative electrode slurry is prepared, the additive, the negative electrode active material, the conductive agent and the binder are added into the negative electrode slurry together, and the negative electrode sheet containing the additive can be prepared after coating. The additive has a porous structure or has conductive Li+Can be adsorbed on the surface of the negative active material, and the introduction of the additive can significantly increase the Li content of the negative plate+The transmission channel improves the dynamic performance of the negative pole piece, reduces polarization and prevents the performance deterioration of the pole piece. Lithium ion thus obtainedThe pool does not lose energy density, and can meet the demand of quick charging.
Drawings
FIG. 1: the mechanism of action of the additives of the present invention.
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 only illustrative and explanatory of the present invention and should not be construed as limiting the scope of the present invention. All the technologies realized based on the above-mentioned contents of the present invention are covered in the protection scope of the present invention.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; reagents, materials and the like used in the following examples are commercially available unless otherwise specified.
Comparative example 1
1) Preparing a positive plate:
mixing 95g of positive electrode active material lithium cobaltate, 2g of binder polyvinylidene fluoride (PVDF), 2g of conductive agent conductive carbon black and 1g of conductive agent carbon nano tube, adding 200g of N-methyl pyrrolidone (NMP), and stirring under the action of a vacuum stirrer until a mixed system becomes positive electrode slurry with uniform fluidity; uniformly coating the positive electrode slurry on an aluminum foil with the thickness of 12 mu m; drying the positive plate at 100 ℃ for 36 hours, then carrying out vacuum treatment to obtain a pole piece, rolling the pole piece, and cutting to obtain a positive plate;
2) preparing a negative plate:
preparing 96.9g of graphite, 0.5g of conductive agent SP, 1.3g of binder carboxymethylcellulose sodium (CMC), 1.3g of binder Styrene Butadiene Rubber (SBR) and 300g of deionized water into slurry by a wet process, coating the slurry on the surface of a copper foil of a negative current collector, and drying, rolling and die-cutting to obtain a negative plate;
3) preparing an electrolyte:
uniformly mixing ethylene carbonate, propylene carbonate, diethyl carbonate and n-propyl propionate according to the mass ratio of 20:10:15:55 in a glove box filled with argon and having qualified water oxygen content, and quickly adding 1mol/L of fully dried hexafluorophosphorusLithium carbonate (LiPF)6) Uniformly stirring to prepare electrolyte;
4) preparation of lithium ion battery
And preparing a lithium ion battery cell from the obtained positive plate and the negative plate, and carrying out liquid injection packaging and welding to obtain the lithium ion battery.
Example 1
Other operations are the same as comparative example 1, except that the preparation of the negative electrode sheet:
96.9g of graphite and 0.5g of porous carbon black (particle diameter: D)10<0.5μm，D50<2μm，D90<5 μm; a specific surface area of>30m2(ii)/g; the porosity is more than or equal to 50 percent), 0.5g of conductive agent SP, 1.3g of binder carboxymethylcellulose sodium (CMC), 1.3g of binder Styrene Butadiene Rubber (SBR) and 300g of deionized water are prepared into slurry by a wet process, the slurry is coated on the surface of a negative current collector copper foil, and a negative plate is obtained by drying, rolling and die cutting.
Example 2
Other operations are the same as comparative example 1, except that the preparation of the negative electrode sheet:
96.9g of graphite, 0.5g of LATP (Li)1.5Ti1.5Al0.5(PO4)3) (the particle diameter is: d10<0.5μm，D50<2μm，D90<5 μm; a specific surface area of>30m2The negative plate is prepared by the following steps of/g), 0.5g of conductive agent SP, 1.3g of binder carboxymethylcellulose sodium (CMC), 1.3g of binder Styrene Butadiene Rubber (SBR) and 300g of deionized water through a wet process to prepare slurry, coating the slurry on the surface of a negative current collector copper foil, and drying, rolling and die-cutting the slurry to obtain the negative plate.
And (3) performance testing:
(1) and (3) testing the rate charging performance of the battery:
the test is carried out at the temperature of 25 +/-5 ℃, and the test process is as follows:
1. standing for 10 min;
2. discharging to lower limit voltage of 3.0V at 0.2C;
3. standing for 10 min;
4. charging at a certain multiplying power (0.2C/0.5C/1C/1.5C/2C), and cutting off current of 0.05C; wherein, constant current charging capacity Q1, total charging capacity Q2 are recorded;
5. standing for 10 min;
6. discharging to lower limit voltage of 3.0V at 0.2C in a constant temperature environment;
7. standing for 10 min.
8. A constant current charging ratio (constant current charging ratio: constant current charging capacity Q1/total charging capacity Q2 × 100%), i.e., a value of constant current charging capacity Q1/total charging capacity Q2, was calculated.
Table 1 rate charging performance of batteries prepared in examples 1 to 2 and comparative example 1
| Item | Example 1 | Example 2 | Comparative example 1 |
| 0.2C | 94.18％ | 94.37％ | 93.66％ |
| 0.5C | 85.56％ | 86.20％ | 84.72％ |
| 1.0C | 74.27％ | 75.43％ | 72.66％ |
| 1.5C | 62.76％ | 65.46％ | 59.98％ |
| 2.0C | 49.23％ | 52.91％ | 44.77％ |
(2) And (3) testing the rate discharge performance of the battery:
the test is carried out at the temperature of 25 +/-5 ℃, and the test process is as follows:
1. standing for 10 min;
2. discharging to lower limit voltage of 3.0V at 0.2C;
3. standing for 10 min;
4. 0.7C is full, and the cut-off current is 0.05C;
5. standing for 10 min;
6. discharging at a constant temperature in a constant-temperature environment at a certain multiplying power (0.2C/0.5C/1C/1.5C/2C/3C) until the lower limit voltage is 3.0V;
7. standing for 10 min;
8. the capacity retention rate (the capacity retention rate discharged in comparison with 0.2C) was calculated, i.e., the values of 0.5C/0.2C, 1.0C/0.2C, 1.5C/0.2C, 2C/0.2C, and 3C/0.2C.
Table 2 rate discharge performance of batteries prepared in examples 1 to 2 and comparative example 1
| Item | Example 1 | Example 2 | Comparative example 1 |
| 0.5C/0.2C | 98.98％ | 99.26％ | 98.75％ |
| 1C/0.2C | 96.18％ | 97.13％ | 96.23％ |
| 1.5C/0.2C | 92.77％ | 94.02％ | 91.49％ |
| 2C/0.2C | 87.28％ | 90.18％ | 85.45％ |
| 3C/0.2C | 70.48％ | 78.10％ | 68.01％ |
As can be seen from tables 1 and 2, the battery composed of the negative electrode sheet of the present invention is more suitable for a rapid charging system, mainly because the negative electrode sheet of the present invention includes the additive, which is a small particle material and adsorbed on the surface of graphite, and can form more microchannels, thereby facilitating the migration of lithium ions, increasing the migration rate, and achieving the rapid charging of the battery.
(3) And (3) testing the porosity of the negative plate:
the test process is as follows: flatly laying the pole piece on a glass desktop, cutting the pole piece into a certain size, measuring the thickness of the pole piece by a ten-thousandth micrometer, and calculating the volume of the pole piece to be V1; then putting the pole piece into testing equipment, opening a gas valve, introducing helium gas, and testing the true volume V2 of the pole piece; the porosity of the pole piece was obtained according to the formula (V1-V2)/V1 × 100%, and the test results are shown in table 3.
Table 3 porosity test of negative electrode sheets prepared in examples 1 to 2 and comparative example 1
| Porosity of front negative plate of lithium ion battery assembled by negative plates | |
| Comparative example 1 | 24.09％ |
| Example 1 | 26.57％ |
| Example 2 | 27.11％ |
As can be seen from table 3, the porosity of the negative electrode sheet added with the additive is significantly increased, which indicates that the additive in the negative electrode sheet can be adsorbed on the surface of the negative electrode active material to form a plurality of microchannels, which is helpful for the migration of lithium ions and increases the migration rate.
(4) And (3) energy density testing:
the thickness (unit mm) of the battery was measured using a 600g PPG thickness gauge, and the length and width (unit mm) were determined based on the model of the battery and were regarded as fixed values. Energy Density (ED, unit Wh/L) is the sort discharge Energy value (Wh)/cell thickness/cell length/cell width 1000, and the test results are shown in table 4.
Table 4 energy density test of the batteries prepared in examples 1 to 2 and comparative example 1
| Energy density Wh/L | |
| Comparative example 1 | 721.5 |
| Example 1 | 721.3 |
| Example 2 | 722.1 |
As can be seen from table 4, the energy density of the battery composed of the cathode sheets added with the additive is not reduced, and at the same time, the quick charge capacity of the battery is further improved, which indicates that the battery of the present invention does not lose the energy density, but can meet the requirement of quick charge.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The negative plate comprises a negative current collector and a negative active material coated on one or two sides of the negative current collectorA layer of a negative electrode active material comprising a negative electrode active material, a conductive agent, a binder and an additive selected from the group consisting of a material having a porous structure and/or having conductive Li+A substance of competence.
2. The negative electrode sheet of claim 1, wherein the additive is selected from at least one of a metallic inorganic substance, a solid electrolyte, and a porous substance.
3. The negative electrode sheet according to claim 1 or 2, wherein the additive has a particle size in the range of: d10<0.5μm，D50<2μm，D90<5μm。
4. The negative electrode sheet according to any one of claims 1 to 3, wherein the additive has a specific surface area of>30m2/g。
5. The negative electrode sheet according to any one of claims 1 to 4, wherein the metallic inorganic substance is selected from at least one of metal oxides, metal hydroxides, metal carbonates, and the like, such as at least one of alumina, magnesia, aluminum hydroxide, aluminum oxyhydroxide, magnesium hydroxide, zirconium hydroxide, and the like.
6. Negative electrode sheet according to any one of claims 1 to 5, wherein the solid-state electrolyte is selected from one or more of perovskite-type electrolytes, anti-perovskite-type electrolytes, garnet-type electrolytes, NASICON-type electrolytes and LISICON-type electrolytes.
7. The negative electrode sheet according to any one of claims 1 to 6, wherein the porous substance is selected from at least one of conductive carbon black, Ketjen black, conductive fibers, conductive polymers, acetylene black, carbon nanotubes, graphene, flake graphite; and/or the porosity of the porous substance is more than or equal to 50 percent.
8. The negative electrode sheet according to any one of claims 1 to 7, wherein the negative electrode active material layer comprises the following components in percentage by mass: 85-98.9 wt% of negative electrode active material, 0.5-5 wt% of conductive agent, 0.5-5 wt% of binder and 0.1-5 wt% of additive.
9. The negative electrode sheet according to any one of claims 1 to 8, wherein the thickness of the negative electrode active material layer is 10 μm to 150 μm.
10. A lithium ion battery comprising the negative electrode sheet of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110786612.8A CN113451581A (en) | 2021-07-12 | 2021-07-12 | Negative plate and lithium ion battery comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110786612.8A CN113451581A (en) | 2021-07-12 | 2021-07-12 | Negative plate and lithium ion battery comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113451581A true CN113451581A (en) | 2021-09-28 |
Family
ID=77815970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110786612.8A Pending CN113451581A (en) | 2021-07-12 | 2021-07-12 | Negative plate and lithium ion battery comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113451581A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080448A (en) * | 2023-09-27 | 2023-11-17 | 荣耀终端有限公司 | Semi-solid lithium battery and terminal comprising same |
| CN117293274A (en) * | 2023-11-23 | 2023-12-26 | 宁德时代新能源科技股份有限公司 | Negative electrode plate, preparation method thereof, battery and power utilization device |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013069416A (en) * | 2011-09-20 | 2013-04-18 | Idemitsu Kosan Co Ltd | Negative electrode mixture and all-solid lithium-ion battery using the same |
| CN105226322A (en) * | 2015-10-27 | 2016-01-06 | 宁德新能源科技有限公司 | Cathode size and comprise negative plate, the lithium ion battery of this cathode size |
| CN105308779A (en) * | 2013-06-12 | 2016-02-03 | 赫罗伊斯石英玻璃股份有限两合公司 | Lithium-ion cell for a secondary battery |
| CN107204466A (en) * | 2017-03-31 | 2017-09-26 | 宁波中车新能源科技有限公司 | A kind of ultralow temperature battery capacitor and its preparation |
| WO2017216822A1 (en) * | 2016-06-13 | 2017-12-21 | Nec Corporation | Fast chargeable lithium ion batteries with nano-carbon coated anode material and imide anion based lithium salt electrolyte |
| CN108598371A (en) * | 2018-05-11 | 2018-09-28 | 清陶（昆山）新能源材料研究院有限公司 | A kind of flexible solid lithium ion battery composite negative plate and preparation method thereof and the application in solid lithium ion battery |
| CN108735985A (en) * | 2017-04-18 | 2018-11-02 | 丰田自动车株式会社 | Negative electrode material together, the cathode comprising the negative electrode material together and the all-solid-state lithium-ion secondary battery with the cathode |
| CN109560247A (en) * | 2017-09-26 | 2019-04-02 | 宁德新能源科技有限公司 | Lithium ion battery and its cathode pole piece |
| EP3483971A1 (en) * | 2016-12-26 | 2019-05-15 | Showa Denko K.K. | All-solid-state lithium ion battery |
| CN110299556A (en) * | 2018-03-22 | 2019-10-01 | 株式会社东芝 | Electrode, secondary cell, battery pack and vehicle |
| CN111525088A (en) * | 2019-02-01 | 2020-08-11 | 丰田自动车株式会社 | Negative electrode for lithium ion secondary battery |
| CN111554933A (en) * | 2020-05-12 | 2020-08-18 | 溧阳天目先导电池材料科技有限公司 | Functional nano conductor slurry, preparation method thereof and lithium battery |
| CN112133920A (en) * | 2020-09-30 | 2020-12-25 | 蜂巢能源科技有限公司 | Negative electrode material layer suitable for all-solid-state battery, preparation method of negative electrode material layer, negative electrode sheet and all-solid-state battery |
| CN112331813A (en) * | 2019-08-05 | 2021-02-05 | 珠海冠宇电池股份有限公司 | Negative plate for improving safety of lithium ion battery and preparation method and application thereof |
| CN112713266A (en) * | 2020-12-30 | 2021-04-27 | 蜂巢能源科技有限公司 | Negative electrode slurry and application thereof |
-
2021
- 2021-07-12 CN CN202110786612.8A patent/CN113451581A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013069416A (en) * | 2011-09-20 | 2013-04-18 | Idemitsu Kosan Co Ltd | Negative electrode mixture and all-solid lithium-ion battery using the same |
| CN105308779A (en) * | 2013-06-12 | 2016-02-03 | 赫罗伊斯石英玻璃股份有限两合公司 | Lithium-ion cell for a secondary battery |
| CN105226322A (en) * | 2015-10-27 | 2016-01-06 | 宁德新能源科技有限公司 | Cathode size and comprise negative plate, the lithium ion battery of this cathode size |
| WO2017216822A1 (en) * | 2016-06-13 | 2017-12-21 | Nec Corporation | Fast chargeable lithium ion batteries with nano-carbon coated anode material and imide anion based lithium salt electrolyte |
| EP3483971A1 (en) * | 2016-12-26 | 2019-05-15 | Showa Denko K.K. | All-solid-state lithium ion battery |
| CN107204466A (en) * | 2017-03-31 | 2017-09-26 | 宁波中车新能源科技有限公司 | A kind of ultralow temperature battery capacitor and its preparation |
| CN108735985A (en) * | 2017-04-18 | 2018-11-02 | 丰田自动车株式会社 | Negative electrode material together, the cathode comprising the negative electrode material together and the all-solid-state lithium-ion secondary battery with the cathode |
| CN109560247A (en) * | 2017-09-26 | 2019-04-02 | 宁德新能源科技有限公司 | Lithium ion battery and its cathode pole piece |
| CN110299556A (en) * | 2018-03-22 | 2019-10-01 | 株式会社东芝 | Electrode, secondary cell, battery pack and vehicle |
| CN108598371A (en) * | 2018-05-11 | 2018-09-28 | 清陶（昆山）新能源材料研究院有限公司 | A kind of flexible solid lithium ion battery composite negative plate and preparation method thereof and the application in solid lithium ion battery |
| CN111525088A (en) * | 2019-02-01 | 2020-08-11 | 丰田自动车株式会社 | Negative electrode for lithium ion secondary battery |
| CN112331813A (en) * | 2019-08-05 | 2021-02-05 | 珠海冠宇电池股份有限公司 | Negative plate for improving safety of lithium ion battery and preparation method and application thereof |
| CN111554933A (en) * | 2020-05-12 | 2020-08-18 | 溧阳天目先导电池材料科技有限公司 | Functional nano conductor slurry, preparation method thereof and lithium battery |
| CN112133920A (en) * | 2020-09-30 | 2020-12-25 | 蜂巢能源科技有限公司 | Negative electrode material layer suitable for all-solid-state battery, preparation method of negative electrode material layer, negative electrode sheet and all-solid-state battery |
| CN112713266A (en) * | 2020-12-30 | 2021-04-27 | 蜂巢能源科技有限公司 | Negative electrode slurry and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117080448A (en) * | 2023-09-27 | 2023-11-17 | 荣耀终端有限公司 | Semi-solid lithium battery and terminal comprising same |
| CN117080448B (en) * | 2023-09-27 | 2024-03-19 | 荣耀终端有限公司 | Semi-solid lithium battery and terminal comprising same |
| CN117293274A (en) * | 2023-11-23 | 2023-12-26 | 宁德时代新能源科技股份有限公司 | Negative electrode plate, preparation method thereof, battery and power utilization device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115602789A (en) | Negative plate and secondary battery | |
| EP4243116A1 (en) | Lithium-ion battery | |
| CN106784789B (en) | Lithium-rich manganese-based material lithium ion battery anode and lithium ion battery comprising same | |
| KR20170053123A (en) | Negative electrode active material and negative electrode for secondary battery comprising the same | |
| KR20180029919A (en) | Negative electrode, secondary battery, battery module and battery pack comprising the same | |
| WO2014129720A1 (en) | Secondary battery including silicon-metal alloy based negative active material | |
| CN111799470B (en) | Positive pole piece and sodium ion battery | |
| CN112467308A (en) | Diaphragm, preparation method thereof and lithium ion battery | |
| EP3675252A1 (en) | Negative electrode active material for lithium secondary battery and method for preparing same | |
| CN110600680A (en) | Positive electrode slurry, positive plate comprising positive electrode slurry and lithium ion battery | |
| CN114665065A (en) | Positive pole piece and preparation method and application thereof | |
| KR20180101896A (en) | Negative electrode active material for lithium secondary battery, and preparing method therof | |
| CN113451581A (en) | Negative plate and lithium ion battery comprising same | |
| CN113328098A (en) | Negative plate and lithium ion battery comprising same | |
| CN113614951A (en) | Method for preparing negative electrode for secondary battery | |
| CN115395116A (en) | Sodium-ion battery positive pole piece, preparation method thereof and sodium-ion battery | |
| CN115347253A (en) | Composite anode lithium supplement additive and preparation method and application thereof | |
| CN116097463A (en) | Negative electrode and secondary battery comprising same | |
| KR20190029044A (en) | Negative electrode active material, negative electrode comprising the negative electrode active material, and lithium secondarty battery comprising the negative electrode | |
| KR20210101540A (en) | Negative electrode, and secondary battery comprising the same | |
| CN113196524A (en) | Negative electrode material, negative electrode sheet, electrochemical device, and electronic device | |
| CN116387447A (en) | Lithium ion battery fast-charge negative plate, electrochemical device and electronic device | |
| CN112447936A (en) | Negative pole piece and lithium secondary battery thereof | |
| CN114497440B (en) | Negative plate and battery comprising same | |
| KR20200085587A (en) | Anode and Lithium Secondary Battery Comprising the Same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |