CN115275204A - Sodium ion battery sodium supplement additive and method - Google Patents
Sodium ion battery sodium supplement additive and method Download PDFInfo
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- CN115275204A CN115275204A CN202211004284.2A CN202211004284A CN115275204A CN 115275204 A CN115275204 A CN 115275204A CN 202211004284 A CN202211004284 A CN 202211004284A CN 115275204 A CN115275204 A CN 115275204A
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- 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
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- 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
- H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
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- 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
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- H01M4/0402—Methods of deposition of the material
- H01M4/0419—Methods of deposition of the material involving spraying
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- 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
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Abstract
The invention relates to a sodium supplement additive for a sodium ion battery, which comprises a mixture of aromatic sodium sulfonate and an inorganic compound of sodium. The invention also relates to a sodium ion battery sodium supplement adding method, which comprises the following steps: step S1, preparing a material; s2, premixing materials; s3, dispersing materials; the step S4 of using materials comprises the following steps: (1) directly added to the positive electrode active material; (2) spraying on the surface of the prepared positive plate; (3) spraying the anode active material on an anode current collector and coating the anode active material; (4) the three modes are mixed for use. The sodium supplement additive provided by the invention utilizes the unique molecular structure of the aromatic compound, so that the aromatic compound has better binding capacity with the positive active material, and the sodium supplement function is effectively realized through reasonable compatibility of the organic sodium source and the inorganic sodium source, thereby improving the charge and discharge performance of the sodium-ion battery.
Description
Technical Field
The invention relates to a sodium supplement additive and a method for a sodium ion battery, belonging to the technical field of sodium ion batteries.
Background
Recently, sodium ion batteries have low material price, good battery safety performance, excellent high and low temperature performance and the like, so that the sodium ion batteries have good application prospects in the fields of new energy storage and power. However, the sodium ion battery has irreversible sodium ion loss during the first charging process, which seriously affects the electrical properties of the sodium ion battery, so that sodium supplementation is required for the sodium ion battery.
The positive sodium supplement technology is the main research direction of the sodium supplement technology at present. For example:
chinese patent CN202210212758.6 provides a sodium supplement additive for a sodium ion battery anode, a sodium supplement method, an anode and a flexible electrode, wherein the chemical formula of the additive is NaCxNyHz, and x =2-4,y =2-4,z =2-4. The additive aims to solve the defects that the conventional sodium supplement additive has a short plate with a single function, only provides extra sodium supplement capacity, and cannot improve the electrochemical properties such as anode cycle, multiplying power and the like.
Chinese patent CN202111493113.6 provides an organic sodium supplement additive, a positive electrode plate and application in a sodium ion battery, wherein the organic sodium supplement additive is a chain-shaped organic compound, and the chemical formula of the chain-shaped organic compound is CmH2m-7Na3O7 (m is more than or equal to 4). Aims to compensate the irreversible sodium ion loss caused by the formation of a solid electrolyte interface film or the occurrence of side reaction in the formation process of the sodium ion battery, improve the actual capacity of the full battery and realize the improvement of the cycle life and the energy density of the sodium ion battery.
Chinese patent CN202010437309.2 provides a sodium supplement additive for a sodium ion battery anode, a sodium ion battery anode plate and a sodium ion battery, wherein the sodium supplement additive is a compound of sodium oxide and organic sodium salt, the organic sodium salt is at least one of trisodium cyanurate, sodium ascorbate and sodium urate, the sodium supplement additive is formed by compounding sodium oxide and organic sodium salt, and additional sodium ions are provided through the electrochemical reaction of the compound on the positive electrode.
Through the patent, it can be found that sodium organic compound can be used as a sodium supplement material, however, the sodium supplement effect of the existing sodium supplement additive is not good, certain short plates exist, such as poor stability and low ionization degree, and the first charging efficiency and the comprehensive performance of the sodium ion battery can not be effectively improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides a sodium ion battery sodium supplement additive and a method, and the specific technical scheme is as follows:
a sodium ion battery sodium supplement additive comprises a mixture of inorganic compounds of aromatic sodium sulfonate and sodium.
Furthermore, an aromatic ring on the molecular structure of the aromatic sodium sulfonate has a functional group R, the functional group R is one or more of hydroxyl, carboxyl, aldehyde group, alkyl, sulfydryl, ethyl and methyl ester group, and the functional group R contains one or more of C, H, O, N, S, P elements.
Furthermore, at least 2 aromatic rings on the molecular structure of the aromatic sodium sulfonate are one or more of 4,4' -biphenyl disulfonic acid sodium, [1,1-biphenyl ] -4-sulfonic acid sodium, anthraquinone-2-sulfonic acid sodium and 2-dibenzofuran sulfonic acid sodium;
further, the inorganic compound of sodium is one or more of sodium sulfate, sodium thiosulfate, sodium sulfite and sodium phosphate.
Furthermore, the weight ratio of the aromatic sodium sulfonate to the inorganic compound of sodium is 1 (0.01-0.20), and the dosage of the sodium supplement additive is 1.0-5.0% of the weight of the positive active material.
A sodium ion battery sodium supplement adding method is characterized in that a sodium ion sodium supplement additive is directly added into a positive active material, and the specific adding method comprises the following steps: under the temperature condition of 25 +/-5 ℃, in the production process of the anode slurry, firstly, adding materials required by the production of the anode material into a stirring tank, and finishing the preparation of the slurry; secondly, adding the sodium supplement additive into the anode slurry at the speed of 40-100ml/min by using a feeding device of a funnel or a peristaltic pump under the stirring condition of 80-200r/min of the anode slurry, and stirring while adding; after the sodium supplement additive is completely added, continuously stirring for 15-30min at the speed of 80-200 r/min.
A sodium ion battery sodium supplement adding method is characterized in that a sodium ion sodium supplement additive is sprayed on the surface of a prepared positive plate, and the specific spraying method comprises the following steps: adopting high-pressure airless spraying at the temperature of 25 +/-5 ℃, wherein the pump pressure is 15-25MPa, the spray gun is vertical to the surface of the positive plate, and the distance is 25-50cm; and after the spraying is finished, drying for 5-8h at the temperature of 65-75 ℃.
A sodium ion battery sodium supplement adding method, sodium ion sodium supplement additive is sprayed on a positive current collector and then positive active material coating is carried out, the specific spraying method is as follows: adopting high-pressure airless spraying at the temperature of 25 +/-5 ℃, pumping at 15-25MPa, and enabling a spray gun to be vertical to the surface of the positive current collector at a distance of 25-50cm; and after the spraying is finished, drying for 5-8h at the temperature of 65-75 ℃.
A sodium ion battery sodium supplement adding method is added according to any two combinations or three combinations.
Further, the sodium supplement additive also comprises a pretreatment process before adding and using, and the pretreatment process comprises the following steps:
step S1 material preparation: weighing the inorganic compounds of sodium aromatic sulfonate and sodium according to the weight ratio of claim 5;
step S2, premixing materials: placing the material prepared in the step S1 into a material stirring tank for dry mixing to obtain a premixed material, wherein the mixing conditions are as follows: the temperature is 20-25 ℃, the rotating speed is 60-120r/min, and the time is 2-4 hours;
step S3, material dispersion: adding a solvent used for producing the positive plate of the sodium-ion battery into the material stirring tank in the step S2 according to the proportion of 15-20ml/g of the solvent/premixed material, and stirring to obtain a dispersed material, wherein the stirring conditions are as follows: the temperature is 20-25 ℃, the rotating speed is 60-120r/min, and the time is 1-2 hours.
The invention has the beneficial effects that:
most of the existing organic sodium supplement materials are chain organic compounds or non-aromatic cyclic compounds, and the sodium organic compounds have poor stability and low ionization degree. The aromatic sodium sulfonate compound in the sodium supplement additive has higher ionization degree and can provide a stable sodium source for a sodium ion battery.
Meanwhile, the molecular structures of the existing compounds are mostly in a non-planar state, and cannot be well fused with the layered structure of the cathode material. The aromatic sodium sulfonate compound in the sodium supplement additive has a stable planar structure in the molecular structure, so that the additive and the positive active material have better binding capacity.
According to the invention, through reasonable compatibility of the organic sodium source and the inorganic sodium source, the sodium supplement function is effectively realized, so that the first capacity of the sodium-ion battery is effectively improved, and the charge and discharge performance of the sodium-ion battery is improved.
Drawings
FIG. 1 is a method of sodium supplementation according to the present invention;
FIG. 2 is a graph comparing the first capacity test of example one with the first comparative example;
FIG. 3 is a comparative graph of the first capacity test of example two versus comparative example two;
FIG. 4 is a graph comparing the first capacity test of example three with comparative example three;
FIG. 5 is a comparison graph of the charge and discharge efficiency tests of example one-two-three and comparative example one-two-three;
FIG. 6 is a graph comparing the residual capacity after 500 cycles for example one and comparative example one under 1C charge and discharge conditions;
FIG. 7 is a graph comparing the residual capacity after 500 cycles for example two and comparative example two under 1C charge and discharge conditions;
FIG. 8 is a graph comparing the residual capacity after 500 cycles of the third example and the third comparative example under the charge and discharge conditions of 1C.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
Example one
Taking vanadium polyanion material Na 3 V 2 (PO 4 ) 3 The cathode material is prepared by taking 4,4' -biphenyl disulfonic acid sodium and sodium thiosulfate as sodium supplement additives, taking N-methyl pyrrolidone (NMP) as a solvent, taking polyvinylidene fluoride (PVDF) as a binder, taking acetylene black as a conductive agent and taking aluminum foil as a current collector.
Wherein, the molecular formula of 4,4' -biphenyl disulfonic acid sodium is
The sodium supplement addition method according to figure 1:
step S1 material preparation: according to Na 3 V 2 (PO 4 ) 3 Weighing 4,4' -biphenyl sodium disulfonate and sodium thiosulfate with the mass of 1.0 percent and 0.01 percent;
step S2, premixing materials: placing the weighed materials in a stirring tank for dry mixing, wherein the mixing conditions are as follows: stirring for 2 hours at the temperature of 20 ℃ and the rotating speed of 60r/min to obtain a premixed material;
step S3, material dispersion: adding NMP solvent into a stirring tank according to the proportion of 15ml/g (solvent/premixed material), and continuously stirring for 1 hour to obtain a dispersed material of the sodium supplement additive;
step S4 uses: in the production process of the positive plate of the sodium-ion battery, the dispersion material is directly added into the positive active material for use, and the sodium-ion positive plate added with the sodium supplement additive is obtained.
A sodium ion battery with the theoretical capacity of 10.0 is prepared by using the positive plate.
Example two
Taking Prussian white positive electrode material Na 2 Mn[Mn(CN) 6 ]Is a positive electrode material, and is prepared from 4,4' -biphenyl disulfonic acid sodium salt with hydroxyl and sulfydryl and [1,1-biphenyl with ethyl and carbomethoxy]Sodium-4-sulfonate, anthraquinone-2-sulfonate, sodium 2-dibenzofuran sulfonate, sodium sulfate, sodium thiosulfate and sodium sulfite as sodium supplementing additive, and azomethylpyrrolidone (NM)P) is solvent, polyvinylidene fluoride (PVDF) is binder, acetylene black is conductive agent, and aluminum foil is current collector.
Wherein: 4,4' -biphenyl disulfonic acid sodium salt with hydroxyl and sulfhydryl groups has the molecular formula
The molecular formula of the anthraquinone-2-sodium sulfonate is shown as follows;
the molecular formula of the 2-dibenzofuran sodium sulfonate is shown as follows.
The sodium supplement addition method according to figure 1:
step S1 material preparation: according to Na 2 Mn[Mn(CN) 6 ]Weighing 1.0%, 1.0% and 2.0% of 4,4' -biphenyl disulfonic acid sodium salt with hydroxyl and sulfhydryl and [1,1-biphenyl with ethyl and carbomethoxy]-4-sodium sulfonate, anthraquinone-2-sodium sulfonate, 2-dibenzofuran sodium sulfonate; according to Na 2 Mn[Mn(CN) 6 ]Weighing sodium sulfate, sodium thiosulfate and sodium sulfite with mass of 0.05%, 0.05% and 0.10%;
step S2, premixing materials: placing the weighed materials in a stirring tank for dry mixing, wherein the mixing conditions are as follows: stirring for 4 hours at the temperature of 25 ℃ and the rotating speed of 120r/min to obtain a premixed material;
step S3, material dispersion: adding NMP solvent into a stirring tank according to the proportion of 20ml/g (solvent/premixed material), and continuously stirring for 2 hours to obtain a dispersed material of the sodium supplement additive;
step S4 uses: in the production process of the positive plate of the sodium-ion battery, firstly, 10% of the dispersion material is uniformly sprayed on the surface of an aluminum foil current collector, then, 80% of the dispersion material is directly added into the positive active material for use, and after the positive plate is completely dried, the rest 10% of the dispersion material is uniformly sprayed on the surface of the positive plate, so that the sodium-ion positive plate added with the sodium supplement additive is obtained.
The positive plate is used for preparing a sodium ion battery with the theoretical capacity of 5.0.
EXAMPLE III
Taking vanadium polyanion material Na 3 V 2 (PO 4 ) 3 Taking [1,1-biphenyl as anode material]4-sodium sulfonate, 2-dibenzofuran sodium sulfonate with carboxyl, sodium phosphate and sodium sulfate are taken as sodium supplement additives, N-methyl pyrrolidone (NMP) is taken as a solvent, polyvinylidene fluoride (PVDF) is taken as a binder, acetylene black is taken as a conductive agent, and aluminum foil is taken as a current collector.
Wherein, [1,1-biphenyl]-4-sodium sulfonate having the formula
The sodium supplement addition method according to figure 1:
step S1 material preparation: according to Na 3 V 2 (PO 4 ) 3 Weighing 1.5% and 1.0% of [1,1-biphenyl%]-sodium 4-sulfonate, sodium 2-dibenzofuran sulfonate with carboxyl groups; according to Na 3 V 2 (PO 4 ) 3 Weighing sodium phosphate and sodium sulfate 0.15 wt% and 0.15 wt%;
step S2, premixing materials: placing the weighed materials in a stirring tank for dry mixing, wherein the mixing conditions are as follows: stirring for 3 hours at the temperature of 23 ℃ and the rotating speed of 100r/min to obtain a premixed material;
step S3, material dispersion: adding NMP solvent into a stirring tank according to the proportion of 18ml/g (solvent/premixed material), and continuously stirring for 1.5 hours to obtain a dispersed material of the sodium supplement additive;
step S4 uses: in the production process of the sodium ion battery positive plate, 95% of the dispersion material is directly added into the positive active material for use, and after the positive plate is completely dried, the remaining 5% of the dispersion material is uniformly sprayed on the surface of the positive plate, so that the sodium ion positive plate added with the sodium supplement additive is obtained.
A sodium ion battery with the theoretical capacity of 15.0 is prepared by using the positive plate.
Comparative example 1
The production process is the same as that of the first embodiment, vanadium polyanion material Na is used 3 V 2 (PO 4 ) 3 The material is used as a positive electrode material, and a positive electrode plate and a sodium ion battery with the theoretical capacity of 10.0 are prepared, but the material does not contain a sodium supplement additive.
Comparative example No. two
The material was the same as that of example two, and Prussian white positive electrode material Na was used 2 Mn[Mn(CN) 6 ]The material is used as a positive electrode material, and a positive plate and a sodium ion battery with the theoretical capacity of 5.0 are prepared, but the material does not contain a sodium supplement additive.
Comparative example No. three
The material is the same as the three phases of the embodiment, and vanadium-based polyanion material Na is used 3 V 2 (PO 4 ) 3 The material is used as a positive electrode material, a positive plate and a sodium ion battery with the theoretical capacity of 15.0 are prepared, but the material does not contain a sodium supplement additive.
The first capacity, the charge-discharge efficiency and the residual capacity were measured for the second three of the above examples and the second three of the comparative examples, respectively:
testing one: first time capacity
Step S1, battery initialization discharge:
step S11: standing the produced sodium ion battery monomer for 5 hours at the temperature of 25 +/-2 ℃;
step S12: charging to 4.20V or charging voltage specified by manufacturer with current of 0.5C multiplying power, and standing for 30min;
step S13: discharging with 0.5C current to 2.50V or discharge voltage specified by manufacturer, and standing for 30min.
Step S2, primary capacity test:
step S21: under the condition of 25 plus or minus 2 ℃, finishing initialization discharge;
step S22: charging to 4.20V or charging voltage specified by manufacturer with current of 0.5C multiplying power, and standing for 30min;
step S23: discharging at 0.5C current to 2.50V or discharge voltage specified by manufacturer, and standing for 30min;
step S24: steps S22-S23 were repeated twice, with the results being the mean of the capacities of the 3 trials.
And (2) testing: charge and discharge efficiency
In the process of testing the first capacity, the charging capacity and the discharging capacity in the process of three times of charging and discharging are respectively recorded, namely C C1 、C D2 、C C3 And C D1 、C C2 、C D3 The charge-discharge efficiency can be obtained, and the formula is as follows:
charge-discharge efficiency = (C) C1 /C D1 +C C2 /C D2 +C C3 /C D3 )÷3×100％。
And (3) testing: residual capacity
Step S1: completing initialization discharge at the temperature of 25 +/-2 ℃;
step S2: charging to 4.20V or charging voltage specified by manufacturer with current of 1.0C multiplying power, and standing for 30min;
and step S3: discharging with current of 1.0C multiplying power to 2.50V or discharge voltage specified by manufacturer, standing for 30min, and recording the discharge capacity C1;
and step S4: repeating the steps S2-S3, repeating the steps 499 times, and recording the discharge capacity Cn (n is the discharge times) of each time;
step S5: the percentage value of Cn to C1 was used as the remaining capacity result.
The three tests described above gave the following data:
in conjunction with fig. 2-8 and the above table, it can be seen that:
the first capacities of the second and third examples are superior to those of the corresponding comparative examples, and the results show that the sodium supplement additive can effectively make up the irreversible loss of sodium in the sodium-ion battery and improve the initial capacity. In addition, the charge-discharge efficiency of the second and third components and the index of the residual capacity after 1C circulation are superior to those of the corresponding comparative examples, namely the second and third components, which show that the sodium supplement additive can strengthen the electrode material structure of the sodium-ion battery, effectively improve the embedding/separating capacity of sodium ions in positive and negative electrode materials, and further obviously improve the charge-discharge performance of the sodium-ion battery.
The aromatic sodium sulfonate compound in the sodium supplement additive has a stable planar structure in the molecular structure, so that the additive and the positive active material have better binding capacity; and the compound has higher ionization degree, so that a stable sodium source can be provided for the sodium ion battery. The sodium supplement additive effectively realizes the sodium supplement function through reasonable compatibility of the organic sodium source and the inorganic sodium source, thereby effectively improving the first capacity of the sodium-ion battery and improving the charge and discharge performance of the sodium-ion battery.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A sodium ion battery sodium supplement additive is characterized in that: a mixture of inorganic compounds including sodium and sodium aromatic sulfonates.
2. The sodium ion supplement additive of claim 1, wherein: the aromatic ring on the molecular structure of the aromatic sodium sulfonate has a functional group R, the functional group R is one or more of hydroxyl, carboxyl, aldehyde group, alkyl, sulfydryl, ethyl and carbomethoxy, and the functional group R contains one or more of C, H, O, N, S, P elements.
3. The sodium ion sodium supplement additive of claim 1 or 2, wherein: the aromatic ring on the molecular structure of the aromatic sodium sulfonate is at least 2, and is one or more of 4,4' -biphenyl disulfonic acid sodium, [1,1-biphenyl ] -4-sulfonic acid sodium, anthraquinone-2-sulfonic acid sodium and 2-dibenzofuran sulfonic acid sodium.
4. The sodium ion supplement additive of claim 1, wherein: the inorganic compound of sodium is one or more of sodium sulfate, sodium thiosulfate, sodium sulfite and sodium phosphate.
5. The sodium ion supplement additive of claim 1, wherein: the weight ratio of the aromatic sodium sulfonate to the inorganic compound of sodium is 1 (0.01-0.20), and the dosage of the sodium supplement additive is 1.0-5.0% of the weight of the positive active material.
6. A sodium ion battery sodium supplement adding method is characterized in that: the sodium ion sodium supplement additive as defined in any one of claims 1 to 5 is directly added to a positive electrode active material by a specific addition method:
under the temperature condition of 25 +/-5 ℃, in the production process of the anode slurry, firstly, adding materials required by the production of the anode material into a stirring tank, and finishing the preparation of the slurry; secondly, adding the sodium supplement additive into the anode slurry at the speed of 40-100ml/min by using a feeding device of a funnel or a peristaltic pump under the stirring condition of 80-200r/min of the anode slurry, and stirring while adding; after the sodium supplement additive is completely added, continuously stirring for 15-30min at the speed of 80-200 r/min.
7. A sodium ion battery sodium supplement adding method is characterized in that: the sodium ion sodium supplement additive of any one of claims 1 to 5 is sprayed on the surface of the prepared positive plate, and the specific spraying method comprises the following steps:
adopting high-pressure airless spraying at the temperature of 25 +/-5 ℃, wherein the pump pressure is 15-25MPa, and the spray gun is vertical to the surface of the positive plate and is 25-50cm away from the surface of the positive plate; and after the spraying is finished, drying for 5-8h at the temperature of 65-75 ℃.
8. A sodium ion battery sodium supplement adding method is characterized in that: the sodium ion sodium supplement additive of any one of claims 1 to 5 is sprayed on a positive electrode current collector and then a positive electrode active material is coated, and the specific spraying method comprises the following steps:
adopting high-pressure airless spraying at the temperature of 25 +/-5 ℃, pumping at 15-25MPa, and enabling a spray gun to be vertical to the surface of the positive current collector at a distance of 25-50cm; and after the spraying is finished, drying for 5-8h at the temperature of 65-75 ℃.
9. A sodium ion battery sodium supplement adding method is characterized in that: combining any two or three of claims 6-8.
10. The sodium ion battery sodium supplement adding method according to any one of claims 6-9, wherein the sodium supplement additive further comprises a pretreatment process before adding, and the pretreatment process comprises the following steps:
step S1 material preparation: weighing the inorganic compounds of sodium aromatic sulfonate and sodium according to the weight ratio of claim 5;
step S2, premixing materials: placing the material prepared in the step S1 into a material stirring tank for dry mixing to obtain a premixed material, wherein the mixing conditions are as follows: the temperature is 20-25 ℃, the rotating speed is 60-120r/min, and the time is 2-4 hours;
step S3, material dispersion: adding a solvent used for producing the positive plate of the sodium-ion battery into the material stirring tank in the step S2 according to the proportion of 15-20ml/g of the solvent/premixed material, and stirring to obtain a dispersed material, wherein the stirring conditions are as follows: the temperature is 20-25 ℃, the rotating speed is 60-120r/min, and the time is 1-2 hours.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799456A (en) * | 2022-12-15 | 2023-03-14 | 深圳市国钠科技有限公司 | Method and device for supplementing sodium by cold spraying of negative plate and sodium ion battery |
| CN115832289A (en) * | 2023-02-20 | 2023-03-21 | 河南工学院 | Flexible vanadium manganese sodium phosphate/carbon composite cathode material for sodium ion battery and preparation method thereof |
| CN117239104A (en) * | 2023-11-13 | 2023-12-15 | 宁德时代新能源科技股份有限公司 | Lithium supplementing additive, positive pole piece, battery and electricity utilization device |
-
2022
- 2022-08-22 CN CN202211004284.2A patent/CN115275204A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115799456A (en) * | 2022-12-15 | 2023-03-14 | 深圳市国钠科技有限公司 | Method and device for supplementing sodium by cold spraying of negative plate and sodium ion battery |
| CN115799456B (en) * | 2022-12-15 | 2024-04-02 | 深圳市国钠科技有限公司 | Method and device for supplementing sodium through cold spraying of negative plate and sodium ion battery |
| CN115832289A (en) * | 2023-02-20 | 2023-03-21 | 河南工学院 | Flexible vanadium manganese sodium phosphate/carbon composite cathode material for sodium ion battery and preparation method thereof |
| CN117239104A (en) * | 2023-11-13 | 2023-12-15 | 宁德时代新能源科技股份有限公司 | Lithium supplementing additive, positive pole piece, battery and electricity utilization device |
| CN117239104B (en) * | 2023-11-13 | 2024-03-29 | 宁德时代新能源科技股份有限公司 | Lithium supplementing additive, positive pole piece, battery and electricity utilization device |
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