CN115911319A - Hydrophobic positive electrode material of sodium ion battery, preparation method of positive electrode material and sodium ion battery - Google Patents
Hydrophobic positive electrode material of sodium ion battery, preparation method of positive electrode material and sodium ion battery Download PDFInfo
- Publication number
- CN115911319A CN115911319A CN202211460669.XA CN202211460669A CN115911319A CN 115911319 A CN115911319 A CN 115911319A CN 202211460669 A CN202211460669 A CN 202211460669A CN 115911319 A CN115911319 A CN 115911319A
- Authority
- CN
- China
- Prior art keywords
- sodium
- ion battery
- hydrophobic
- positive electrode
- electrode material
- 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
-
- 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 discloses a hydrophobic sodium-ion battery anode material, which comprises a sodium-ion battery anode material and a hydrophobic composite layer formed on the surface of the sodium-ion battery anode material; wherein the positive electrode material of the sodium-ion battery is a layered metal oxide with a general formula of Na x MO 2+y Wherein M is one or more of transition metals, x is more than or equal to 0.5 and less than or equal to 1.0, y is more than or equal to-0.1 and less than or equal to 0.1, and each element satisfies charge balance; the hydrophobic composite is composed of a hydrophobic binder and a carbon material, wherein the hydrophobic binder is a fluorine-containing polymer. The invention also discloses a preparation method of the hydrophobic sodium-ion battery positive electrode material and a sodium-ion battery positive electrode prepared from the hydrophobic sodium-ion battery positive electrode materialPole piece and sodium ion battery. The hydrophobic sodium ion battery anode material disclosed by the invention has good water resistance, and the stability and electrochemical performance of the layered oxide material after homogenization are improved.
Description
Technical Field
The invention relates to the technical field of sodium ion battery preparation, in particular to a hydrophobic sodium ion battery anode material, a preparation method thereof and a sodium ion battery.
Background
At the end of the last 70 s, the research on sodium ion batteries has been almost synchronized with lithium ion batteries. Because of the energy density and cycle performance limitations faced by sodium ion batteries at that time, lithium ion batteries are more concerned by people, but in recent years, due to scarcity of lithium resources, continuous rising of raw materials and outbreak of energy storage markets, it is very critical to develop other related energy storage technologies which can replace the lithium ion batteries at low cost.
The sodium ion battery is made of sodium carbonate, and is abundant in storage, so that the price is low and the stability is stable throughout the year. The energy density is hopeful to be higher than that of lithium iron in the future, and the lithium iron battery has excellent low-temperature performance (-40 ℃ can discharge) and rate capability. The production process is the same as that of the lithium battery, the industrial popularization difficulty is low, and the sodium ion battery is newly provided with a new energy tuyere in nearly two years.
Currently, the main positive electrode materials available for sodium ion batteries are layered metal oxides (Na) x MO 2 M is Fe, mn, ni, co, etc.), fluorophosphate [ Na 3 (VO x ) 2 (PO 4 ) 2 F 3-2x ,0≤x≤1]And phosphate [ NaFePO ] 4 And Na 3 V 2 (PO 4 ) 3 ]. Among them, the layered metal oxide has the characteristics of low toxicity, low cost, simple synthesis process and the like, and is considered as a promising low-cost sodium-ion battery positive electrode material. In addition, the theoretical capacity of the layered metal oxide is high (about 240 mAh. G) -1 ) And has attractive application prospect in high-capacity sodium ion batteries. However, in the process of charging and discharging, the layered metal oxide cathode material is Na + The embedding and the releasing of the electrode can cause structural phase change, and the capacity of the electrode material is rapidly reduced, so that the defect of poor stability exists, and the popularization speed of the electrode material is not as expected. Secondly, the layered metal oxide is easy to absorb water, and the slurry can become jelly after absorbing water, is lack of fluidity and cannot finish coating of the pole piece. Thus, in productionSpecial handling during storage and transportation is required, which also presents a higher challenge to the cell fabrication environment and process. These all lead to a continuous increase in product cost, which is contrary to the low cost advantage of sodium ion batteries. In addition, the layered metal oxide cathode material has poor moisture control during the preparation process, and the performance of the battery is also extremely adversely affected.
Therefore, improving the stability of the layered metal oxide and improving the electrochemical performance have become important requirements for the development of sodium ion battery technology and industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hydrophobic positive electrode material of a sodium ion battery, which has good water resistance, improves the stability of a layered oxide material after homogenization and improves the electrochemical performance of the sodium ion battery.
The invention provides a hydrophobic sodium-ion battery anode material, which comprises a sodium-ion battery anode material and a hydrophobic composite layer formed on the surface of the sodium-ion battery anode material; wherein the positive electrode material of the sodium-ion battery is a layered oxide with a general formula of Na x MO 2+y Wherein M is one or more of transition metals, x is more than or equal to 0.5 and less than or equal to 1.0, y is more than or equal to-0.1 and less than or equal to 0.1, and each element satisfies charge balance; the hydrophobic composite is composed of a hydrophobic binder and a carbon material, wherein the hydrophobic binder is a fluorine-containing polymer.
Furthermore, the mass ratio of the positive electrode material of the sodium-ion battery to the hydrophobic composite is (20-30): 1.
Further, the fluoropolymer includes at least one of polyvinylidene fluoride, polytetrafluoroethylene, and a fluorine-containing polyolefin.
Further, the carbon material includes at least one of carbon nanofibers, carbon nanotubes, and graphene.
Further, the mass ratio of the hydrophobic binder to the carbon material is 1.5-2:1.
The invention also provides a preparation method of the hydrophobic sodium-ion battery cathode material, which comprises the following steps:
s1, dissolving a hydrophobic binder in an organic solvent, and uniformly stirring; adding a carbon material, and performing ultrasonic dispersion to form a uniform mixture;
s2, uniformly spraying the mixture on the surface of the positive electrode material of the sodium-ion battery through a spray gun;
and S3, calcining the sodium-ion battery anode material with the surface sprayed with the mixture to obtain the hydrophobic sodium-ion battery anode material.
Further, in step S2, the spraying conditions are: the pressure is 0.5-0.8 MPa, the spraying distance is 15-20 cm, and the spraying speed is 10cm/s.
Further, in step S3, the calcination conditions are: raising the temperature to 250-350 ℃ at the speed of 5 ℃/min, and keeping the temperature for 60-120 min.
The third aspect of the invention provides a sodium ion battery positive plate, which comprises a positive current collector and a positive electrode layer positioned on the positive current collector; the positive electrode layer is obtained by preparing the hydrophobic sodium ion battery positive electrode material, the conductive agent and the binder into slurry, coating the slurry on the positive electrode current collector, drying and tabletting.
The invention provides a sodium ion battery in a fourth aspect, which comprises a positive plate, a negative plate, electrolyte and a diaphragm, wherein the diaphragm is arranged to isolate the positive plate from the negative plate, and the positive plate is the positive plate of the sodium ion battery.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the hydrophobic binder and the carbon material are adopted to spray the layered metal oxide electrode material, so that a hydrophobic composite layer is formed on the surface of the electrode material, wherein the hydrophobic binder improves the water resistance of the electrode material, improves the stability of the layered oxide material after homogenization and further improves the reversible capacity; and the introduction of the carbon material increases the contact between the sodium electrode positive electrode materials, improves the conductivity of the slurry and reduces the resistance of the pole piece.
2. The hydrophobic sodium ion battery anode material has the advantages of simple preparation process and low cost; and the hydrophobic composite layer can reduce the usage amount of a conductive agent and a binder in the homogenization process of the sodium-electrode positive electrode material.
Drawings
FIG. 1 is a schematic view of the electrode materials in examples 1-2 and comparative examples 1-2 after the electrode materials have been placed in a homogenate;
fig. 2 is a charge-discharge curve of the button cell in examples 1-2 and comparative examples 1-2.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As described in the background art, layered metal oxides are a promising low-cost positive electrode material for sodium ion batteries, but have the disadvantages of poor water resistance and stability, which limits the application of the layered metal oxides as the positive electrode material for sodium ion batteries.
Aiming at the technical problem, the invention provides a hydrophobic positive electrode material of a sodium-ion battery, which comprises the positive electrode material of the sodium-ion battery and a hydrophobic composite layer formed on the surface of the positive electrode material of the sodium-ion battery; wherein the hydrophobic composite is composed of a hydrophobic binder and a carbon material, and the hydrophobic binder is a fluorine-containing polymer.
In the invention, the positive electrode material of the sodium-ion battery is a layered metal oxide with a general formula of Na x MO 2+y Wherein M is one or more of transition metals, x is more than or equal to 0.5 and less than or equal to 1.0, y is more than or equal to 0.1 and less than or equal to 0.1, and each element satisfies charge balance. Preferably, M is one or more of transition metals such as Fe, mn, ni, co, and the like. As an illustrative example, the layered metal oxide may be Na 0.8 Ni 0.33 Fe 0.33 Mn 0.33 O 2 、NaNi 0.25 Fe 0.5 Mn 0.25 O 2 、Na 0.67 Fe 0.5 Mn 0.5 O 2 、NaNi 0.6 Co 0.05 Mn 0.35 O 2 、NaNi 0.5 Mn 0.5 O 2 And the like.
Aiming at the defects that the layered metal oxide is easy to absorb water and poor in water resistance, the hydrophobic polymer and the carbon material are mixed to form the hydrophobic composite solution, and the hydrophobic composite solution is sprayed on the surface of the layered metal oxide to form a layer of hydrophobic composite film, so that the water absorption of the layered metal oxide is greatly reduced, and the water resistance of the layered metal oxide is improved. And secondly, the positive electrode material and the hydrophobic binder are both granular, the direct compounding of the positive electrode material and the hydrophobic binder can cause poor contact, and the carbon material is fibrous or flaky and can play a role of a bridge when added, so that the contact area between the sodium-electricity positive electrode material and the hydrophobic binder is increased, the conductivity of the slurry can be improved in the homogenizing process, the resistance of a pole piece is reduced, and the capacity and the cycle performance of the battery can be improved.
In the present invention, the mass ratio of the sodium-ion battery positive electrode material to the hydrophobic composite is preferably (20 to 30): 1, 22, and may be, for example, 20.
In the present invention, the hydrophobic polymer is a hydrophobic binder. The hydrophobic binder is preferably a fluoropolymer, including but not limited to at least one of polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), and a fluorinated polyolefin.
In the present invention, the carbon material is preferably a highly conductive material, and may be, for example, one or more of carbon nanofibers, carbon nanotubes, and graphene.
In the present invention, the mass ratio of the hydrophobic binder to the carbon material is preferably 1.5 to 2:1, and more preferably 2:1.
According to the invention, the hydrophobic binder and the carbon material are adopted to treat the layered metal oxide electrode material, so that a hydrophobic composite film is formed on the surface of the layered metal oxide electrode material, and the electrode material is protected, thereby solving the problem of water absorption of the layered metal oxide in the production, storage and transportation processes. In the subsequent slurry preparation process, the hydrophobic binder and the carbon material on the surface of the layered metal oxide can partially replace the binder and the conductive agent, so that the use amount of the binder and the conductive agent in the subsequent slurry preparation process is reduced.
The invention also provides a preparation method of the hydrophobic sodium-ion battery cathode material, which comprises the following steps:
s1, dissolving a hydrophobic binder in an organic solvent, and uniformly stirring; adding a carbon material, and performing ultrasonic dispersion to form a uniform mixture;
s2, uniformly spraying the mixture on the surface of the positive electrode material of the sodium-ion battery through a spray gun;
and S3, calcining the sodium-ion battery anode material with the surface sprayed with the mixture to obtain the hydrophobic sodium-ion battery anode material.
In the step S1, a hydrophobic binder is dissolved in an organic solvent and stirred to form a uniform binder solution; after the carbon material is added, the carbon material is uniformly dispersed in the binder solution by ultrasonic treatment. The organic solvent may be selected from organic solvents commonly used in the art, including but not limited to absolute ethanol, N-methylpyrrolidone (NMP), and the like.
In step S2 of the present invention, the spraying conditions are preferably: the pressure is 0.5-0.8 MPa, the spraying distance is 15-20 cm, and the spraying speed is 10cm/s.
In step S3 of the present invention, the calcination conditions are as follows: raising the temperature to 250-350 ℃ at the speed of 5 ℃/min, and keeping the temperature for 60-120 min. In illustrative embodiments, the temperature of the calcination can be 250 ℃, 260 ℃, 270 ℃, 280 ℃, 290 ℃, 300 ℃, 310 ℃, 320 ℃, 330 ℃, 340 ℃, 350 ℃, or any value in between; the calcination time may be 60min, 70min, 80min, 90min, 100min, 110min, 120min, or any value in between. In a preferred embodiment, the calcination temperature is 250 ℃ and the calcination time is 60min.
According to the invention, the interface bonding force between the hydrophobic adhesive and the layered metal oxide can be increased by a low-temperature calcination mode, and the hydrophobic composite film on the surface of the anode material is prevented from falling off in the processes of production, storage and transportation.
The invention also provides a positive plate of the sodium ion battery, which comprises a positive current collector and a positive layer positioned on the positive current collector; the positive electrode layer is obtained by preparing the hydrophobic sodium ion battery positive electrode material, the conductive agent and the binder into slurry, coating the slurry on the positive electrode current collector, drying and tabletting.
The invention also provides a sodium ion battery, which comprises a positive plate, a negative plate, electrolyte and a diaphragm, wherein the positive plate is the positive plate of the sodium ion battery.
The separator can be selected from one or more of common separator materials of sodium ion batteries, including but not limited to polypropylene separators, polyethylene separators, polyimide separators and cellulose non-woven fabric separators. The negative electrode sheet may be a negative electrode sheet commonly used for sodium ion batteries, and preferably a carbon-based negative electrode, such as a hard carbon negative electrode.
The present invention is further described below in conjunction with the drawings and the embodiments so that those skilled in the art can better understand the present invention and can carry out the present invention, but the embodiments are not to be construed as limiting the present invention.
The experimental methods used in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used therein are commercially available without otherwise specified.
Example 1
1g of polyvinylidene fluoride (PVDF) was dissolved in 10mL of absolute ethanol and magnetically stirred for 30min. 0.5g of carbon nanofibers was further added and ultrasonically dispersed for 30min to form a uniform mixture. The layered metal oxide material Na 0.8 Ni 0.33 Fe 0.33 Mn 0.33 O 2 Placing the mixture into an alumina sample tank, and uniformly spraying the mixture on the surface of the anode material by a spray gun. The pressure of the spray gun is 0.6MPa, the spraying distance is 20cm, and the spraying speed is 10cm/s. Placing the alumina sample tank into a tubular furnace for calcination after standing for 10min,the calcining temperature is 250 ℃, the calcining time is 1h, and the hydrophobic sodium-ion battery anode material is finally obtained.
Example 2
1g of Polytetrafluoroethylene (PTFE) is dissolved in 10mL of absolute ethanol and stirred magnetically for 30min. 0.5g of carbon nanotubes was further added and ultrasonically dispersed for 30min to form a uniform mixture. The layered metal oxide material Na 0.8 Ni 0.33 Fe 0.33 Mn 0.33 O 2 Placing the mixture into an alumina sample tank, and uniformly spraying the mixture on the surface of the anode material by a spray gun. The pressure of the spray gun is 0.6MPa, the spraying distance is 20cm, and the spraying speed is 10cm/s. And standing for 10min, and then putting the alumina sample tank into a tubular furnace for calcination at the temperature of 250 ℃ for 1h to finally obtain the hydrophobic sodium-ion battery anode material.
Comparative example 1
1g of Polytetrafluoroethylene (PTFE) is dissolved in 10mL of absolute ethanol and stirred magnetically for 30min. The positive electrode material of the sodium-ion battery is placed in an alumina sample groove, and the mixture is uniformly sprayed on the surface of the positive electrode material through a spray gun. The pressure of the spray gun is 0.6MPa, the spraying distance is 20cm, and the spraying speed is 10cm/s. And standing for 10min, and then putting the alumina sample tank into a tubular furnace for calcination at the temperature of 250 ℃ for 1h to finally obtain the hydrophobic sodium-ion battery cathode material.
Comparative example 2
By using Na 0.8 Ni 0.33 Fe 0.33 Mn 0.33 O 2 As the positive electrode material of the sodium-ion battery.
Performance testing
1. Stability test
Taking the positive electrode materials of the sodium-ion batteries prepared in examples 1-2 and comparative examples 1-2 respectively, preparing slurry according to the proportion of the positive electrode material of the sodium-ion battery, a conductive agent and a binder = 48.
As can be seen from FIG. 1, the slurries formulated in examples 1-2 and comparative example 1 (FIGS. 1A-C) were good in uniformity and flowability. The hydrophobic composite layer is formed on the surface of the electrode material by spraying the layered metal oxide electrode material with the hydrophobic binder, so that the water resistance of the electrode material in the preparation process is greatly improved, the stability of the layered oxide material after homogenization is improved, the slurry has good fluidity, and the slurry can be coated on a current collector to form a positive plate.
On the other hand, the slurry prepared in comparative example 1 (fig. 1D) had poor fluidity and was not coated on the current collector because the layered metal oxide electrode material was not treated, and the prepared slurry was jelly-like after absorbing water.
2. Battery performance testing
A film coater was placed on a 15 μm thick aluminum foil, and the gap was adjusted to 250 μm. And (3) transferring part of the prepared slurry to an aluminum foil, coating and scraping the slurry once along the coating direction in a one-way manner, and putting the coated pole piece into a drying oven at 100 ℃ for drying for 12 hours. And cutting the pole piece into small wafers with the diameter of 13mm by using a die, weighing, and continuously drying at 100 ℃ for 2h to obtain the anode wafers. And then, transferring the prepared anode wafer, the diaphragm wafer, the sodium sheet, the flat sheet, the elastic sheet, the upper and lower shell covers and the electrolyte into a glove box for buckling and assembling. Placing the inner shell on an operation table, then sequentially placing a sodium sheet, a diaphragm, 2 drops of electrolyte, a positive plate, a flat sheet, an elastic sheet and an outer shell, transferring the assembled buckle capacitor to an encapsulating machine for encapsulating, wherein the sealing pressure is 50 KG-55 Kg/cm 3 And then standing for more than 8 h. And finally, charging and discharging tests are carried out on charging and discharging equipment which is charged to a blue point (the charging and discharging current is 0.1C, and the working voltage is 2.0-4.0V). The results obtained are shown in table 1 and fig. 2.
Table 1 shows the charge and discharge capacities and first-order effects of the button cells of examples 1-2 and comparative examples 1-2.
TABLE 1
| Classification | Charging capacity (mAh/g) | Discharge capacity (mAh/g) | Efficiency (%) |
| Example 1 | 132.4 | 119.5 | 90.3％ |
| Example 2 | 125.8 | 113.2 | 90.0％ |
| Comparative example 1 | 135.2 | 110.0 | 81.4％ |
| Comparative example 2 | 122.4 | 88.1 | 72.0％ |
From the results of table 1 and fig. 2, it can be seen that: comparative example 2 use of layered Metal oxide Na 0.8 Ni 0.33 Fe 0.33 Mn 0.33 O 2 As a positive electrode material, the charging capacity is 122.4mAh/g, the discharging capacity is only 88.1mAh/g, and the first effect is only 72.0%. Comparative example 1, the charge and discharge capacity of the obtained anode material is greatly improved by treating the layered metal oxide material with the hydrophobic binder, the charge capacity reaches 135.2mAh/g, and the discharge capacity reaches 110.0mAh/g; the first effect is also improved to a certain extent, and reaches 81.4 percent.
In example 1-2, the layered metal oxide material was treated with the hydrophobic binder and the carbon material, and the obtained hydrophobic composite was used as the positive electrode material, which not only improved the charge/discharge capacity, but also improved the first effect significantly, with the charge capacity exceeding 125mAh/g, the discharge capacity exceeding 110mAh/g, and the first effect exceeding 90%. This is because the layered metal oxide easily absorbs water, which causes a change in the structure of the material and a decrease in the first effect of the material due to the formation of a heterogeneous phase. The carbon material of examples 1-2 acts as a kink between the hydrophobic binder and the layered oxide, improving contact, while increasing conductivity and first efficiency of the battery.
In conclusion, aiming at the defect that the layered metal oxide cathode material is easy to absorb water, the hydrophobic binder and the carbon material are adopted to treat the layered metal oxide cathode material, and the formed hydrophobic composite is used as the cathode material of the sodium-ion battery, so that the stability of the layered oxide material after homogenization is improved, the conductivity of the slurry is improved, the resistance of a pole piece is reduced, and the charge-discharge capacity and the first effect of the sodium battery are improved.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitutions or changes made by the person skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The hydrophobic positive electrode material of the sodium-ion battery is characterized by comprising a positive electrode material of the sodium-ion battery and a hydrophobic composite layer formed on the surface of the positive electrode material of the sodium-ion battery; wherein the positive electrode material of the sodium-ion battery is a layered metal oxide with a general formula of Na x MO 2+y Wherein M is one or more of transition metals, x is more than or equal to 0.5 and less than or equal to 1.0, y is more than or equal to-0.1 and less than or equal to 0.1, and each element satisfies charge balance; the hydrophobic compound is composed of a hydrophobic binder and a carbon material, wherein the hydrophobic binder is a fluorine-containing polymer.
2. The hydrophobic positive electrode material for the sodium-ion battery according to claim 1, wherein the mass ratio of the positive electrode material for the sodium-ion battery to the hydrophobic composite is (20-30): 1.
3. The hydrophobic positive electrode material for sodium-ion batteries according to claim 1, wherein said fluorine-containing polymer comprises at least one of polyvinylidene fluoride, polytetrafluoroethylene and fluorine-containing polyolefin.
4. The hydrophobic positive electrode material for sodium-ion batteries according to claim 1, wherein said carbon material comprises at least one of carbon nanofibers, carbon nanotubes and graphene.
5. The hydrophobic positive electrode material for sodium-ion batteries according to claim 1, wherein the mass ratio of the hydrophobic binder to the carbon material is 1.5-2:1.
6. The method for preparing the hydrophobic positive electrode material for the sodium-ion battery according to any one of claims 1 to 5, wherein the method comprises the following steps:
s1, dissolving a hydrophobic binder in an organic solvent, and uniformly stirring; adding a carbon material, and performing ultrasonic dispersion to form a uniform mixture;
s2, spraying the mixture on the surface of the positive electrode material of the sodium-ion battery;
and S3, calcining the sodium-ion battery anode material with the surface sprayed with the mixture to obtain the hydrophobic sodium-ion battery anode material.
7. The method for preparing the cathode material of the hydrophobic sodium-ion battery according to claim 6, wherein in the step S2, the spraying conditions are as follows: the spraying pressure is 0.5-0.8 MPa, the spraying distance is 15-20 cm, and the spraying speed is 10cm/s.
8. The method for preparing the hydrophobic positive electrode material for the sodium-ion battery according to claim 6, wherein in the step S3, the calcining conditions are as follows: raising the temperature to 250-350 ℃ at the speed of 5 ℃/min, and keeping the temperature for 60-120 min.
9. The positive plate of the sodium-ion battery is characterized by comprising a positive current collector and a positive layer positioned on the positive current collector; wherein, the positive electrode layer is obtained by preparing the hydrophobic sodium-ion battery positive electrode material, the conductive agent and the binder of any one of claims 1 to 5 into slurry, coating the slurry on the positive electrode current collector, drying and tabletting.
10. A sodium ion battery comprising a positive plate, a negative plate, an electrolyte and a separator, the separator being configured to separate the positive plate from the negative plate, wherein the positive plate is the positive plate of the sodium ion battery of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211460669.XA CN115911319A (en) | 2022-11-17 | 2022-11-17 | Hydrophobic positive electrode material of sodium ion battery, preparation method of positive electrode material and sodium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211460669.XA CN115911319A (en) | 2022-11-17 | 2022-11-17 | Hydrophobic positive electrode material of sodium ion battery, preparation method of positive electrode material and sodium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115911319A true CN115911319A (en) | 2023-04-04 |
Family
ID=86486504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211460669.XA Pending CN115911319A (en) | 2022-11-17 | 2022-11-17 | Hydrophobic positive electrode material of sodium ion battery, preparation method of positive electrode material and sodium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115911319A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116960364A (en) * | 2023-09-21 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Positive electrode current collector, positive electrode plate, battery cell, battery and electricity utilization device |
-
2022
- 2022-11-17 CN CN202211460669.XA patent/CN115911319A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116960364A (en) * | 2023-09-21 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Positive electrode current collector, positive electrode plate, battery cell, battery and electricity utilization device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9728780B2 (en) | Layered oxide material, preparation method, electrode plate, secondary battery and use | |
| CN111435761B (en) | All-solid-state lithium ion battery and hot-pressing preparation method of multilayer electrolyte membrane thereof | |
| CN104934579B (en) | A kind of porous graphite doping and the preparation method of carbon coating graphite cathode material | |
| CN108539141B (en) | Preparation method of ternary layered positive electrode material for sodium-ion battery | |
| CN106252659A (en) | Integrated flexible thin film lithium sulfur or lithium ion battery cell, battery and preparation method | |
| WO2016176928A1 (en) | Negative electrode material, preparation method therefor, and lithium-ion secondary battery using the negative electrode material | |
| CN103151510A (en) | Lithium ion battery cathode material and preparation method thereof | |
| WO2021088354A1 (en) | Core-shell nickel ferrite and preparation method therefor, nickel ferrite@c material, preparation method therefor, and use thereof | |
| CN105161693A (en) | High-cycle lithium ion battery multi-element anode material NCM and preparation method thereof | |
| CN105958031A (en) | Sulfur-based cathode composite material and preparation method thereof | |
| CN109346710B (en) | Lithium titanate nitride-aluminum oxide nitride composite material and preparation method and application thereof | |
| CN110148739A (en) | A kind of carbon@allyl sulfides itrile group polymer composite anode active material, anode and its preparation and the application in lithium-sulfur cell | |
| CN112281258A (en) | Li3VO4Negative electrode material of/C fiber lithium ion battery and preparation method | |
| CN110854370A (en) | Preparation method of high nickel cobalt lithium manganate positive electrode material | |
| CN110335996A (en) | A kind of high capacity lithium ion cells cathode and its application | |
| CN107946564B (en) | Rich in Na4Mn2O5/Na0.7MnO2Composite material and preparation method and application thereof | |
| CN109904448A (en) | A kind of super alkene macromolecule lead storage battery green plate lead plaster | |
| CN115911319A (en) | Hydrophobic positive electrode material of sodium ion battery, preparation method of positive electrode material and sodium ion battery | |
| CN102299367B (en) | Lithium titanate-lithium nickel cobalt manganate lithium ion battery and preparation method thereof | |
| CN111740084B (en) | Sulfur-doped pre-lithiated silicon-carbon composite material and preparation method thereof | |
| EP4145476A1 (en) | Positive electrode of hybrid capacitor and manufacturing method therefor and use thereof | |
| CN108400340A (en) | A kind of lithium ion cell positive, preparation method and lithium ion battery | |
| CN107749468A (en) | A kind of preparation method and application of carbon nano-fiber with multilevel hierarchy, metal phase molybdenum disulfide and sulphur composite | |
| CN113871737A (en) | Lithium ion battery activation method containing lithium-rich manganese-based material and obtained lithium ion battery | |
| CN109659538B (en) | Preparation of rich lithium manganese-based oxide material based on coating of dopamine and lithium phosphate, product and application thereof |
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 |