CN111029575A - Modified carbon fluoride positive electrode material, positive electrode plate containing modified carbon fluoride positive electrode material, battery and preparation method of modified carbon fluoride positive electrode material - Google Patents
Modified carbon fluoride positive electrode material, positive electrode plate containing modified carbon fluoride positive electrode material, battery and preparation method of modified carbon fluoride positive electrode material Download PDFInfo
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- H01—ELECTRIC ELEMENTS
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
Abstract
The invention discloses a modified carbon fluoride anode material, an anode piece, a battery and a preparation method thereof, belonging to the field of chemical power supply, wherein the modified preparation process comprises the following steps: the carbon fluoride material modified by the nano metal particles improves the conductivity of the carbon fluoride material, and solves the problems of the initial discharge voltage hysteresis phenomenon in a lithium carbon fluoride primary battery and the large charge-discharge polarization in a sodium carbon fluoride secondary battery.
Description
Technical Field
The invention belongs to the technical field of chemical power supplies, and particularly relates to a preparation method of a high-conductivity modified carbon fluoride positive electrode material, and a positive electrode piece and a battery applied by the high-conductivity modified carbon fluoride positive electrode material.
Background
The carbon fluoride anode material has excellent characteristics of high specific capacity, stable electrochemistry, stable discharge platform and the like, and is widely applied to the lithium primary battery, but the intrinsic conductivity of the material is poor, the electrode dynamics process is slow, so that the lithium/carbon fluoride battery generates larger polarization in the discharge process, and the voltage hysteresis phenomenon is easy to occur.
In recent years, the application of a Carbon fluoride positive electrode material to a room temperature sodium secondary battery (w.liu, h.li, j.y.xie, z.w.fu, ACS appl.mater.interfaces 2014,6, 2209; w.liu, z.shadow, Carbon,93,2015,523; y.shao, h.yue, chem.mater.2016,28,1026), magnesium primary battery (x.miao, j.yang, w.pan, h.yuan, y.nuli, s.i.hirano, electrochim.acta 2016) has attracted attention, but at present Na/CFxThe discharge/charge potential difference of the system is large, resulting in low energy efficiency. If the carbon fluoride anode material is modified, the voltage hysteresis phenomenon can be eliminated in the primary battery, and the polarization of the secondary battery can be reduced, so that the carbon fluoride anode material has a great application prospect.
Disclosure of Invention
Aiming at the problems of initial discharge voltage hysteresis in the existing lithium fluorocarbon primary battery and large charge-discharge polarization in the sodium fluorocarbon secondary battery, the invention provides a modified carbon fluoride anode material modified by nano metal particles, a preparation method thereof, and an anode plate and a battery related to the modified carbon fluoride anode material.
The technical solution of the invention is as follows: a preparation method of a modified carbon fluoride cathode material comprises the following steps:
(1) dispersing a carbon fluoride material in water under the action of a surfactant to form a carbon fluoride dispersion liquid;
(2) respectively dissolving metal salt and a reducing agent in water to prepare a metal salt solution and a reducing agent solution;
(3) pouring the prepared reducing agent solution into the carbon fluoride dispersion liquid, then dropwise adding the metal salt solution into the carbon fluoride dispersion liquid, filtering and drying after the reaction is finished, and evaporating the solvent to obtain the modified carbon fluoride cathode material.
Preferably, the carbon fluoride material in the step (1) is selected from one or more of graphite fluoride, carbon fluoride fiber, graphene fluoride, carbon fluoride nano disc, fluorinated coke, fluorinated mesophase carbon sphere and fluorinated multi-wall carbon nanotube, and the molar ratio of fluorine to carbon in the carbon fluoride material is 0.33-1.2; the mass percentage concentration of the carbon fluoride in the carbon fluoride dispersion liquid is 0.1-5 mg/ml.
Preferably, the surfactant is selected from one or more of alkylphenol polyoxyethylene ether (OP-10), sucrose ester, polysorbate, polyoxyethylene polyoxypropylene ether block copolymer (F-127), polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide (CTAB), and the mass percentage concentration of the surfactant in the carbon fluoride dispersion is 0.01-1 mg/ml.
Preferably, the reducing agent in the step (2) is selected from one of ascorbic acid and hydrogen peroxide; the mass percentage concentration of the reducing agent in the prepared reducing agent solution is 2-10 mg/ml.
Preferably, the metal salt in the step (2) is one of acetate, chloride and sulfate of metal; the metal is selected from one of Fe, Cu, Ag, Au, Pt, Pd, Co and Ni; the mass percentage concentration of the metal salt in the prepared metal salt solution is 1-50 mg/ml.
Preferably, in the step (3), 0.01mmol to 0.1mmol of metal salt is added to each mg of carbon fluoride, and the molar ratio of the metal salt to the reducing agent is 1: (1-10).
Preferably, the dropping mode of the metal salt solution in the step (3) is one of manual dropping, a peristaltic pump and a separating funnel.
In the preferable scheme, the reaction temperature in the step (3) is 70-90 ℃, and the reaction time is 30-60 min.
Preferably, the drying method in the step (3) is one of forced air drying and vacuum drying, the drying temperature is 80-100 ℃, and the drying time is 12-24 hours.
And (3) carrying out redox reaction on the metal salt and the reducing agent in the step (3), replacing the metal, and controlling the dropping sequence, the dropping speed and the concentration of the reaction materials of the reducing agent and the metal salt solution to ensure that the metal generated by the reaction is not agglomerated and form nano metal particles attached to the carbon fluoride material.
The invention also provides a positive pole piece prepared by using the modified carbon fluoride positive pole material prepared by the method, and the modified carbon fluoride positive pole piece comprises the following components: modified carbon fluoride anode material, conductive agent, binder and current collector.
In a preferable scheme, in the fluorocarbon anode plate, the mass ratio of the binder is 5-15%, the mass ratio of the conductive agent is 10-40%, and the mass ratio of the modified fluorocarbon anode material is 60-85%.
The preparation method of the modified fluorocarbon anode piece comprises the following steps: firstly, dissolving a binder in a solvent, and stirring to form a uniform solution; and then sequentially adding the prepared modified carbon fluoride anode material and a conductive agent into the solution to prepare modified carbon fluoride anode material slurry, finally coating the slurry on the surface of a current collector, and drying to prepare the modified carbon fluoride anode piece.
In a preferred scheme, the conductive agent is one or more of superconducting carbon black, acetylene black, conductive graphite, conductive carbon fiber, carbon nano tube and graphene.
Preferably, the binder is one of polyvinylidene fluoride (PVDF) and acrylonitrile multipolymer (LA 132/133).
Preferably, the solvent is one of N-methylpyrrolidone (NMP) and water.
Preferably, the current collector is made of one of aluminum foil, carbon-coated aluminum foil and corrosion aluminum foil.
Preferably, the drying temperature is 80-100 ℃.
The invention also provides a preparation method of the modified fluorocarbon anode piece, which comprises the following steps: dispersing the modified carbon fluoride material in an aqueous solution, adding a conductive agent, uniformly dispersing, carrying out suction filtration, taking off the positive electrode, and drying to prepare the flexible, three-dimensional, adhesive-free and current collector-free carbon fluoride positive electrode piece. The mass ratio of the conductive agent in the pole piece is 10-40%, and the mass ratio of the modified carbon fluoride anode material is 60-85%.
The invention also provides a battery assembled by the modified carbon fluoride anode pole piece prepared by the method, which comprises the following components: modified carbon fluoride positive pole piece, negative pole, electrolyte, diaphragm.
The negative electrode is selected from the IA group, IIA group, aluminum, zinc and alloy or intermetallic compound thereof.
The electrolyte comprises an organic solvent and electrolyte salt, and the concentration of the electrolyte salt in the organic solvent is 0.3-2 mol/L.
The organic solvent is selected from the group consisting of dimethyl carbonate (DMC), diethyl carbonate (DEC), 1, 2-Dimethoxyethane (DME), Tetrahydrofuran (THF), Methyl Acetate (MA), diglyme, triglyme, tetraglyme, Propylene Carbonate (PC), Ethylene Carbonate (EC), acetonitrile, dimethyl sulfoxide, dimethylformamide, dimethylacetamide, gamma-butyrolactone (GBL), N-methyl-pyrrolidone (NMP), ethylmethyl carbonate, vinylene carbonate, dioxolane, dioxane, dimethoxyethane, or a mixture thereof.
The electrolyte salt is selected from MM' F6Or MM' F4A salt in which M is the same metal as at least one of the metals in the negative electrode, and M' is an element selected from trivalent phosphorus, arsenic, antimony and boron, such as lithium salt LiPF6、LiAsF6、LiSbF6、LiBF4、LiClO4、LiAlCl4、LiGaCl4、LiC(SO2CF3)3、LiB(C6H4O2)2、LiN(SO2CF3)2、LiN(SO2C2F5)2、LiB(C2O4)2、Li(SO3CF3) And salts of mixtures thereof, and the like for other batteries.
The diaphragm is selected from one or more of polypropylene, polyethylene, polyamide, polyvinylidene chloride (PVC), polyvinylidene fluoride (PVDF), glass fiber and non-woven fabrics.
Compared with the prior art, the invention has the advantages that:
(1) the nano metal particle modified carbon fluoride cathode material prepared by the invention improves the conductivity of the carbon fluoride material, and solves the voltage hysteresis phenomenon of the initial discharge stage in the lithium carbon fluoride primary battery;
(2) in the sodium carbon fluoride secondary battery, the nano metal particles act as a catalyst, the form of a discharge product is influenced in the discharge process, and the discharge product which is easier to decompose is promoted to be generated, so that the polarization in the charging process is reduced;
(3) the modification method is simple, the cost is low, the effect is obvious, the carbon fluoride anode material modified by the nano metal particles is prepared, the battery performance is improved, the material is suitable for preparing conventional pole pieces and flexible pole pieces, can be converted to future wearable electronic equipment, and can also be used as anode materials of different metal-based batteries.
Drawings
FIG. 1 is a discharge curve of a nano-metal particle modified fluorocarbon positive electrode material and a non-modified fluorocarbon positive electrode material in a lithium battery according to example 1 of the present invention;
FIG. 2 is a micro-topography of a modified fluorocarbon positive electrode material of example 2 of the present invention;
FIG. 3 is a graph comparing the charge and discharge voltage curves of the modified fluorocarbon positive electrode material and the carbon fluoride material before modification in a sodium battery according to example 2 of the present invention.
Detailed Description
The following examples of the present invention are given for the purpose of further illustrating the invention and are not to be construed as limiting the scope of the invention as claimed.
Example 1
A preparation method of a modified carbon fluoride cathode material comprises the following steps:
(1) weighing 300mg of fluorinated multi-walled carbon nanotubes (the molar ratio of fluorocarbon is 0.96), dispersing in 200ml of deionized water under the action of 10mg of F-127, and performing ultrasonic treatment to form uniform fluorinated multi-walled carbon nanotube dispersion liquid;
(2) then dissolving 1.0g of ascorbic acid in 100ml of water, wherein the concentration of the prepared ascorbic acid solution is 10mg/ml, and dissolving 1.5g of chloroauric acid in 150ml of water, wherein the solubility of the prepared chloroauric acid aqueous solution is 10 mg/ml;
(3) and then pouring 100ml of ascorbic acid solution into the fluorinated multi-walled carbon nanotube dispersion liquid, stirring uniformly, then dropwise adding 150ml of chloroauric acid aqueous solution, after dropwise adding, heating the solution to 80 ℃, keeping the temperature for 1h, then cooling to room temperature, carrying out suction filtration, and carrying out forced air drying at 80 ℃ for 12h to obtain the modified fluorinated multi-walled carbon nanotube cathode material.
Preparing a modified fluorinated multi-walled carbon nanotube positive pole piece: dissolving 12.5mg of polyvinylidene fluoride (PVDF) in 1.5ml of N-methylpyrrolidone (NMP), stirring to form a uniform solution, sequentially adding 100mg of modified fluorinated multi-walled carbon nanotubes and 12.5mg of superconducting carbon black conductive agent, stirring for 8 hours to prepare modified fluorinated multi-walled carbon nanotube positive electrode slurry, finally coating the slurry on a carbon-coated aluminum foil, and drying at 100 ℃ to obtain the modified fluorinated carbon multi-walled nanotube battery positive electrode piece.
Comparative example: preparing the unmodified fluorinated multi-walled carbon nanotube positive pole piece according to the same preparation method.
Preparing a metal-based battery: punching and cutting the prepared modified fluorinated multi-walled carbon nanotube anode into a round pole piece with phi of 14mm, drying the round pole piece in a vacuum drying oven at the temperature of 85 ℃ for 24 hours, and under the condition of dry air or inert atmosphere, taking a metal lithium piece as a cathode, a polypropylene/polyethylene/polypropylene composite membrane as a diaphragm and 1mol/L lithium tetrafluoroborate (LiBF)4) Taking Propylene Carbonate (PC) +1, 2-Dimethoxyethane (DME) (volume ratio is 1:1) as electrolyte to assemble the CR2016 button cell. The cell was discharged to 1.5V at a current density of 50 mA/g.
Similarly, button cells without the modified fluorinated multi-walled carbon nanotube positive electrode were assembled and normalized for discharge capacity, as shown in fig. 1, the discharge voltage at the initial stage of discharge was about 50mV higher than the unmodified material.
Example 2
A preparation method of a modified carbon fluoride cathode material comprises the following steps:
(1) weighing 50mg of fluorinated graphene (with the molar ratio of fluorocarbon being 0.97), dispersing in 200ml of deionized water under the action of 5mg of CTAB, and ultrasonically forming uniform fluorinated graphene dispersion liquid;
(2) then dissolving 1.0g of ascorbic acid in 100ml of water, wherein the concentration of the prepared ascorbic acid solution is 10mg/ml, and dissolving 350mg of silver acetate in 200ml of water, and the solubility of the prepared silver acetate aqueous solution is 1.75 mg/ml;
(3) and then pouring 100ml of ascorbic acid solution into the fluorinated graphene dispersion liquid, stirring uniformly, then dropwise adding 200ml of silver acetate aqueous solution, after dropwise adding, heating the solution to 85 ℃, keeping the temperature for 45min, cooling to room temperature, carrying out suction filtration, and carrying out forced air drying at 80 ℃ for 12h to obtain the modified fluorinated graphene cathode material. The microstructure of the modified fluorinated graphene material is shown in fig. 2.
Preparing a modified fluorinated graphene positive pole piece: taking 15mg of modified fluorinated graphene material, dispersing in 50ml of deionized water, performing ultrasonic treatment to form a uniform solution, sequentially adding 5mg of superconducting carbon black conductive agent and 5mg of graphene oxide, performing ultrasonic treatment for 3 hours to form modified fluorinated graphene anode dispersion liquid, performing suction filtration, removing an anode, and drying at 85 ℃.
Preparing an unmodified fluorinated graphene positive pole piece: taking 15mg of unmodified fluorinated graphene material, dispersing in 50ml of deionized water, performing ultrasonic treatment to form a uniform solution, sequentially adding 5mg of superconducting carbon black conductive agent and 5mg of graphene oxide, and performing ultrasonic treatment for 3 hours to form the fluorinated graphene anode dispersion solution. And after suction filtration, removing the positive electrode, and drying at 85 ℃ to obtain the comparative positive electrode.
Preparing a metal-based battery: punching and cutting the prepared modified fluorinated graphene anode into a round pole piece with phi 8mm, drying the round pole piece in a vacuum drying oven at 100 ℃ for 24 hours, and under the condition of dry air or inert atmosphere, taking a metal sodium piece as a cathode, taking glass fiber as a diaphragm and 0.9mol/L sodium hexafluorophosphate (NaPF)6) And the/1, 2-Dimethoxyethane (DME) is used as electrolyte to assemble the CR2016 button cell. The cell was cycled at a current density of 50 mA/g. The capacity is normalized, the first charge-discharge curves of the modified battery and the battery before modification are shown in figure 3, and the polarization of the modified fluorinated graphene battery is obviously reduced in the initial discharge stage.
Example 3
A preparation method of a modified carbon fluoride cathode material comprises the following steps:
(1) weighing 100mg of fluorinated graphene (with the molar ratio of fluorocarbon being 0.8), dispersing in 200ml of deionized water under the action of 20mg of F-127, and performing ultrasonic treatment to form uniform fluorinated graphene dispersion liquid;
(2) then 2.6g of ascorbic acid is dissolved in 260ml of water, the concentration of the prepared ascorbic acid solution is 10mg/ml, 2000mg of ferric sulfate is dissolved in 100ml of water, and the solubility of the prepared ferric sulfate aqueous solution is 20 mg/ml;
(3) and then pouring 260ml of ascorbic acid solution into the fluorinated graphene dispersion liquid, stirring uniformly, then dropwise adding 100ml of ferric sulfate aqueous solution, after dropwise adding, heating the solution to 85 ℃, keeping the temperature for 45min, cooling to room temperature, carrying out suction filtration, and carrying out forced air drying at 80 ℃ for 12h to obtain the modified fluorinated graphene cathode material.
Preparing a modified fluorinated graphene positive pole piece: taking 15mg of modified fluorinated graphene material, dispersing in 50ml of deionized water, performing ultrasonic treatment to form a uniform solution, sequentially adding 5mg of superconducting carbon black conductive agent and 5mg of graphene oxide, performing ultrasonic treatment for 3 hours to form modified fluorinated graphene anode dispersion liquid, performing suction filtration, removing an anode, and drying at 85 ℃.
Preparing an unmodified fluorinated graphene positive pole piece: taking 15mg of unmodified fluorinated graphene material, dispersing in 50ml of deionized water, performing ultrasonic treatment to form a uniform solution, sequentially adding 5mg of superconducting carbon black conductive agent and 5mg of graphene oxide, and performing ultrasonic treatment for 3 hours to form the fluorinated graphene anode dispersion solution. And after suction filtration, removing the positive electrode, and drying at 85 ℃ to obtain the comparative positive electrode.
Preparing a metal-based battery: the prepared modified fluorinated graphene anode is punched and cut into a round pole piece with phi of 8mm at 100 DEG CThe mixture is dried in a vacuum drying oven for 24 hours, and under the condition of dry air or inert atmosphere, a metal sodium sheet is taken as a negative electrode, glass fiber is taken as a diaphragm, and 0.9mol/L sodium hexafluorophosphate (NaPF)6) And the/1, 2-Dimethoxyethane (DME) is used as electrolyte to assemble the CR2016 button cell. The cell was cycled at a current density of 50 mA/g. The polarization of the modified fluorinated graphene cell was reduced by about 40mV compared to the unmodified fluorinated carbon cell.
Example 4
A preparation method of a modified carbon fluoride cathode material comprises the following steps:
(1) weighing 50mg of carbon fluoride fiber (the molar ratio of fluorocarbon is 0.92), dispersing in 50ml of deionized water under the action of 10mg of polyvinylpyrrolidone (PVP), and performing ultrasonic treatment to form uniform carbon fluoride fiber dispersion liquid;
(2) then dissolving 1.4g of ascorbic acid in 200ml of water, wherein the concentration of the prepared ascorbic acid solution is 7mg/ml, dissolving the hexahydrate and 960mg of nickel chloride in 100ml of water, and the solubility of the prepared nickel chloride aqueous solution is 9.6 mg/ml;
(3) and then pouring 200ml of ascorbic acid solution into the carbon fluoride fiber dispersion liquid, stirring uniformly, then dropwise adding 100ml of nickel chloride aqueous solution, after dropwise adding, heating the solution to 85 ℃, keeping the temperature for 45min, cooling to room temperature, carrying out suction filtration, and carrying out forced air drying at 80 ℃ for 12h to obtain the modified carbon fluoride cathode material.
Preparing a modified carbon fluoride positive pole piece: taking 15mg of modified carbon fluoride material, dispersing in 50ml of deionized water, carrying out ultrasonic treatment to form a uniform solution, sequentially adding 5mg of superconducting carbon black conductive agent and 5mg of graphene oxide, carrying out ultrasonic treatment for 3 hours to form a modified carbon fluoride anode dispersion solution, carrying out suction filtration, removing the anode, and drying at 85 ℃.
Preparing an unmodified carbon fluoride positive pole piece: taking 15mg of unmodified carbon fluoride material, dispersing in 50ml of deionized water, performing ultrasonic treatment to form a uniform solution, sequentially adding 5mg of superconducting carbon black conductive agent and 5mg of graphene oxide, and performing ultrasonic treatment for 3 hours to form the carbon fluoride anode dispersion liquid. And after suction filtration, removing the positive electrode, and drying at 85 ℃ to obtain the comparative positive electrode.
Preparing a metal-based battery: modified carbon fluoride to be preparedPunching the positive electrode into a round pole piece with the diameter of 8mm, drying the pole piece in a vacuum drying oven at 100 ℃ for 24 hours, and under the condition of dry air or inert atmosphere, taking a metal sodium piece as a negative electrode, taking glass fiber as a diaphragm and taking 0.9mol/L sodium hexafluorophosphate (NaPF)6) And the/1, 2-Dimethoxyethane (DME) is used as electrolyte to assemble the CR2016 button cell. The cell was cycled at a current density of 50 mA/g. The polarization of the modified fluorocarbon cell was reduced by about 45mV compared to the unmodified fluorocarbon cell.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (14)
1. A preparation method of a modified carbon fluoride anode material is characterized by comprising the following steps: the method comprises the following steps:
(1) dispersing a carbon fluoride material in water under the action of a surfactant to form a carbon fluoride dispersion liquid;
(2) respectively dissolving metal salt and a reducing agent in water to prepare a metal salt solution and a reducing agent solution;
(3) pouring the prepared reducing agent solution into the carbon fluoride dispersion liquid, then dropwise adding the metal salt solution into the carbon fluoride dispersion liquid, filtering and drying after the reaction is finished, and evaporating the solvent to obtain the modified carbon fluoride cathode material.
2. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: the mass percentage concentration of the carbon fluoride in the carbon fluoride dispersion liquid in the step (1) is 0.1-5 mg/ml.
3. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: the carbon fluoride material is one or more of graphite fluoride, carbon fluoride fiber, graphene fluoride, carbon fluoride nano-discs, fluorinated coke, fluorinated mesophase carbon spheres and fluorinated multi-walled carbon nanotubes, and the molar ratio of fluorine to carbon in the carbon fluoride material is 0.33-1.2.
4. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: the surfactant is one or more of alkylphenol polyoxyethylene, sucrose ester, polysorbate, polyoxyethylene polyoxypropylene block copolymer, polyvinylpyrrolidone and hexadecyl trimethyl ammonium bromide; in the carbon fluoride dispersion liquid, the mass percentage concentration of the surfactant is 0.01-1 mg/ml.
5. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: the reducing agent is one of ascorbic acid and hydrogen peroxide, and the mass percentage concentration of the reducing agent in the reducing agent solution prepared in the step (2) is 2-10 mg/ml.
6. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: the mass percentage concentration of the metal salt in the metal salt solution prepared in the step (2) is 1-50 mg/ml.
7. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 6, wherein: the metal salt in the step (2) is one of metal acetate, chloride and sulfate; the metal is one of Fe, Cu, Ag, Au, Pt, Pd, Co and Ni.
8. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: in the step (3), 0.01 mmol-0.1 mmol of metal salt is added into each mg of carbon fluoride, and the molar ratio of the metal salt to the reducing agent is as follows: 1: (1-10).
9. The method for preparing a modified fluorocarbon positive electrode material as claimed in claim 1, wherein: the reaction temperature in the step (3) is 70-90 ℃, and the reaction time is 30-60 min; the drying temperature is 80-100 ℃, and the drying time is 12-24 h.
10. A modified fluorocarbon positive electrode material characterized by: the modified fluorocarbon anode material is prepared by the preparation method of the modified fluorocarbon anode material provided by any one of claims 1 to 9.
11. The preparation method of the modified fluorocarbon anode sheet according to claim 10, characterized in that: dissolving a binder in a solvent, stirring to form a uniform solution, sequentially adding a modified carbon fluoride anode material and a conductive agent into the solution to prepare modified carbon fluoride anode material slurry, coating the slurry on the surface of a current collector, and drying to prepare the modified carbon fluoride anode piece.
12. The preparation method of the modified fluorocarbon anode sheet according to claim 11, wherein the preparation method comprises the following steps: in the modified carbon fluoride battery positive pole piece, the mass ratio of the binder is 5-15%, the mass ratio of the conductive agent is 10-40%, and the mass ratio of the modified carbon fluoride positive pole material is 60-85%.
13. The preparation method of the modified fluorocarbon anode sheet according to claim 12, wherein the preparation method comprises the following steps: the conductive agent is one or more of superconducting carbon black, acetylene black, conductive graphite, conductive carbon fiber, carbon nano tube and graphene; the binder is one of polyvinylidene fluoride and acrylonitrile multipolymer; the solvent is one of N-methyl pyrrolidone and water; the current collector is made of one of aluminum foil, carbon-coated aluminum foil and corrosion aluminum foil.
14. A fluorocarbon battery comprising the modified fluorocarbon positive electrode sheet of any one of claims 11 to 13, characterized in that: the fluorinated carbon battery comprises: modified carbon fluoride positive pole piece, negative pole, electrolyte, diaphragm.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111952539A (en) * | 2020-08-24 | 2020-11-17 | 上海空间电源研究所 | Preparation method of high-capacity electrode and metal lithium battery |
| CN112635773A (en) * | 2020-12-21 | 2021-04-09 | 中国科学院长春应用化学研究所 | Positive pole piece for primary battery and primary battery |
| CN114583128A (en) * | 2022-03-07 | 2022-06-03 | 湘潭大学 | Controllable preparation method of surface high-conductivity carbon fluoride |
| CN114628631A (en) * | 2022-03-07 | 2022-06-14 | 湘潭大学 | Preparation method of high-capacity alkali metal-carbon fluoride secondary battery |
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| CN114583128B (en) * | 2022-03-07 | 2023-09-19 | 湘潭大学 | Controllable preparation method of surface highly conductive carbon fluoride |
| CN114628631B (en) * | 2022-03-07 | 2023-09-19 | 湘潭大学 | Preparation method of high-capacity alkali metal-carbon fluoride secondary battery |
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