CN106654195A - Lithium ion battery and preparation method therefor - Google Patents
Lithium ion battery and preparation method therefor Download PDFInfo
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- CN106654195A CN106654195A CN201611046762.0A CN201611046762A CN106654195A CN 106654195 A CN106654195 A CN 106654195A CN 201611046762 A CN201611046762 A CN 201611046762A CN 106654195 A CN106654195 A CN 106654195A
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/37—Phosphates of heavy metals
- C01B25/375—Phosphates of heavy metals of iron
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
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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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M4/36—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
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
- H01M4/36—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
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- 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
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Abstract
The invention provides a lithium ion battery. The lithium ion battery comprises a positive electrode plate, a negative electrode plate, a diaphragm, a non-aqueous electrolyte and a shell, wherein the positive electrode plate, the negative electrode plate, the diaphragm and the non-aqueous electrolyte are accommodated in an accommodating space formed in the shell; the positive electrode plate comprises a current collector and a lithium ion battery positive electrode material for coating the surface of the current collector; the lithium ion battery positive electrode material comprises a positive electrode active material, a binder and an organic solvent; the positive electrode active material and the binder are dispersed in the organic solvent; the mass of the positive electrode active material accounts for 50-95% of the total mass of the positive electrode active material and the binder; the positive electrode active material comprises lithium iron phosphate and graphene for coating the surface of the lithium iron phosphate; the mass ratio of lithium iron phosphate to graphene is 1-100 to 1; the negative electrode plate comprises a current collector and a lithium ion battery negative electrode material for coating the surface of the current collector; the battery negative electrode material comprises a negative electrode active material; and the negative electrode active material comprises at least one kind of natural graphite, artificial graphite, soft carbon and hard carbon. The lithium ion battery is high in high-rate charging and discharging property and cycling stability.
Description
Technical field
The present invention relates to field of batteries, and in particular to a kind of lithium ion battery and preparation method thereof.
Background technology
Due to the increasingly depleted of the energy, increasingly serious along with municipal pollution, people are to novel green high efficient energy sources
Demand is increasingly urgent.Lithium ion battery becomes research emphasis now as the new forms of energy with powerful advantages.Lithium ion battery is
The best battery of combination property, it has the advantages that many protrusions：Lightweight, energy storage is big, and power is big, pollution-free, also without secondary dirt
Dye, life-span length, self discharge coefficient is little, Acclimation temperature wide ranges.
The deciding factor of restriction capacity of lithium ion battery is positive electrode.Improve the electrification of anode material for lithium-ion batteries
Performance is learned, the capacity and electrical conductivity for improving positive electrode is the key of solve problem.Lithium ion battery since the advent of the world always with
Cobalt acid lithium, manganate cathode material for lithium are leading, the LiCoO of commercialization2Shortage of resources, cycle life is short, it is expensive simultaneously
And toxic, LiNiO2Preparation it is difficult, and there is safety issue, and LiMn2O4Cycle performance and high-temperature behavior still need into
The improvement of one step.LiFePO4 (LiFePO4) Stability Analysis of Structures, aboundresources, have a safety feature, nontoxic environmentally friendly, and
As temperature is raised, material specific capacity increase is suitable for some and requires than using under relatively severe condition.Research shows
LiFePO4Have become one of most promising anode material for lithium-ion batteries.
But LiFePO44Material is limited to low electronic conductivity, causes the high rate performance of battery poor, it is difficult to adapt to
The requirement of the high-power output of electrokinetic cell.Therefore, it is necessary to provide a kind of new lithium ion battery.
The content of the invention
To solve the above problems, the invention provides a kind of lithium ion battery, the lithium ion battery has high magnification charge and discharge
Electrical property and stable circulation performance.Present invention also offers a kind of preparation method of lithium ion battery.
First aspect present invention provides a kind of lithium ion battery, including positive plate, negative plate, barrier film, nonaqueous electrolytic solution
And housing, the positive plate, the negative plate, the barrier film and the nonaqueous electrolytic solution are contained in the collecting that the housing is formed
In space；
The positive plate includes collector and is coated in the anode material for lithium-ion batteries of the collection liquid surface, the lithium
Ion battery positive electrode includes positive electrode active materials, binding agent and organic solvent, the positive electrode active materials and the bonding
Agent is dispersed in the organic solvent, and the quality of the positive electrode active materials accounts for the positive electrode active materials and the binding agent is total
The 50%-95% of quality, the positive electrode active materials include LiFePO4 and the Graphene for being coated on the LiFePO4 surface,
The LiFePO4 is 1-100 with the mass ratio of the Graphene:1；
The negative plate includes collector and is coated in the lithium ion battery negative material of the collection liquid surface, the lithium
Ion battery cathode material include negative active core-shell material, the negative active core-shell material include native graphite, Delanium, soft carbon and
At least one in hard carbon.
Preferably, the LiFePO4 and the mass ratio of the Graphene are 50-80:1.
Preferably, the number of plies of the Graphene for being coated on the lithium iron phosphate particles surface is 5-10 layers.
Preferably, the anode material for lithium-ion batteries also includes conductive agent, the positive electrode active materials, the conduction
Agent, the quality of the binding agent account for respectively the 70%- of the positive electrode active materials, the conductive agent and the binding agent gross mass
90%th, 5%-20% and 5%-10%, the quality of the organic solvent accounts for the anode material for lithium-ion batteries gross mass
30%-70%.
The lithium ion battery that first aspect present invention is provided, the battery has high-rate charge-discharge capability and cyclical stability
Energy.
Second aspect present invention provides a kind of preparation method of lithium ion battery, including：
Positive electrode active materials, binding agent are mixed with organic solvent, anode material for lithium-ion batteries is obtained after stirring；By lithium
Ion battery positive electrode is coated in the surface of the collector, obtains positive plate；
The positive electrode active materials and the binding agent are dispersed in the organic solvent, the matter of the positive electrode active materials
Amount accounts for the 50%-95% of the positive electrode active materials and the binding agent gross mass, and the positive electrode active materials include ferric phosphate
Lithium and the Graphene for being coated on the LiFePO4 surface, the LiFePO4 is 1-100 with the mass ratio of the Graphene:1；
Lithium ion battery negative material is coated in into the surface of the collector, negative plate, the lithium ion battery is obtained
Negative material includes negative active core-shell material, and the negative active core-shell material is included in native graphite, Delanium, soft carbon and hard carbon
It is at least one；
The positive plate, the negative plate and barrier film are laminated and are wound, battery core is obtained, the barrier film is arranged on just
Between pole piece and negative plate, the battery core is loaded in the receiving space of housing, inject electrolyte, lithium-ion electric is obtained after sealing
Pond.
Preferably, the mixed method of the positive electrode active materials, binding agent and organic solvent is to add the binding agent
To in organic solvent, 2-5 hours are stirred in de-airing mixer, add the positive electrode active materials, stir 2-5 hours, obtained
To anode material for lithium-ion batteries.
Preferably, the anode material for lithium-ion batteries also includes conductive agent, the positive electrode active materials, conductive agent, viscous
Knot agent quality account for respectively the positive electrode active materials, 70%-90%, 5%-20% of conductive agent and binding agent gross mass and
5%-10%, the quality of the organic solvent accounts for the 30%-70% of the anode material for lithium-ion batteries gross mass.
Preferably, the mixed method of the positive electrode active materials, conductive agent, binding agent and organic solvent is：Will be described viscous
Knot agent is added in organic solvent, and 2-5 hours are stirred in de-airing mixer, adds the conductive agent, continues stirring 2-5 little
Shi Hou, adds the positive electrode active materials, stirs 2-5 hours, obtains anode material for lithium-ion batteries.
Preferably, the preparation method of the positive electrode active materials, including：
Ferric lithium phosphate precursor and Graphene raw material are added in solvent, 2-5h is disperseed under ultrasound condition, after being dried,
Grapheme lithium iron phosphate presoma is obtained, the LiFePO4 is 1-100 with the mass ratio of the Graphene raw material:1；
The grapheme lithium iron phosphate presoma is placed in reducing atmosphere, at 500 DEG C -800 DEG C 5-12h is calcined, obtained
To the positive electrode active materials.
Preferably, described 500 DEG C -800 DEG C are risen to the programming rate of 5-20 DEG C/min.
The preparation method of the lithium ion battery that second aspect present invention is provided is very simple, and obtained lithium ion battery has
High-rate charge-discharge capability and stable circulation performance.
To sum up, beneficial effect of the present invention includes the following aspects：
1st, the lithium ion battery that the present invention is provided, the battery has high-rate charge-discharge capability and stable circulation performance；
2nd, the preparation method of the lithium ion battery that the present invention is provided, preparation method is very simple.
Specific embodiment
Described below is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
First aspect present invention provides a kind of lithium ion battery, including positive plate, negative plate, barrier film, nonaqueous electrolytic solution
And housing, positive plate, negative plate, barrier film and nonaqueous electrolytic solution are contained in the receiving space of housing formation；
Positive plate includes collector and is coated in the anode material for lithium-ion batteries of collection liquid surface, lithium ion cell positive
Material includes positive electrode active materials, binding agent and organic solvent, and positive electrode active materials and binding agent disperse in organic solvent, just
The quality of pole active material accounts for the 50%-95% of positive electrode active materials and binding agent gross mass, and positive electrode active materials include phosphoric acid
Iron lithium and the Graphene for being coated on LiFePO4 surface, LiFePO4 is 1-100 with the mass ratio of Graphene:1；
Negative plate includes collector and is coated in the lithium ion battery negative material of collection liquid surface, lithium ion battery negative
Material includes negative active core-shell material, and negative active core-shell material includes at least in native graphite, Delanium, soft carbon and hard carbon
Kind.
In the present invention, LiFePO4 is graininess, and particle diameter is 20nm-300nm.
In the present invention, the particle diameter of LiFePO4 is 20nm-100nm.
In the present invention, the number of plies for being coated on the Graphene on lithium iron phosphate particles surface is 5-10 layers.
In the present invention, the number of plies of Graphene is 5-6 layers.
In the present invention, LiFePO4 is 50-80 with the mass ratio of Graphene:1.
In the present invention, LiFePO4 is 65-75 with the mass ratio of Graphene:1.
In the present invention, positive electrode active materials are the grain structure that particle diameter is 50nm-350nm.
In the present invention, anode material for lithium-ion batteries also includes conductive agent, positive electrode active materials, conductive agent, binding agent
Quality accounts for respectively 70%-90%, 5%-20% and 5%-10% of positive electrode active materials, conductive agent and binding agent gross mass, has
The quality of machine solvent accounts for the 30%-70% of anode material for lithium-ion batteries gross mass.
In the present invention, conductive agent is graphite, carbon black or carbon fiber.
In the present invention, binding agent is Kynoar or epoxy resin.
In the present invention, organic solvent includes DMF, DMA, N-2- crassitudes
One or more in ketone, acetone, tetrahydrofuran and methyl alcohol.
The anode material for lithium-ion batteries that the present invention is provided, including positive electrode active materials, Graphene in positive electrode active materials
Addition, substantially increase electric conductivity, high-rate charge-discharge capability and the stable circulation performance of LiFePO 4 material.Meanwhile, stone
Will not reunite between black alkene.
In the present invention, lithium ion battery negative material also includes conductive agent, binding agent and organic solvent, negative electrode active material
Material, conductive agent and binding agent disperse in organic solvent, negative active core-shell material, conductive agent and binding agent account for negative active core-shell material,
90%-97%, 0-3% and 2%-8% of conductive agent and binding agent gross mass, the quality of organic solvent accounts for lithium ion battery negative
The 30%-70% of material gross mass.
In the present invention, Delanium includes carbonaceous mesophase spherules.
In the present invention, barrier film is PE barrier films, PP barrier films or PE/PP composite diaphragms.
In the present invention, nonaqueous electrolytic solution is lithium salt solution, and lithium salt solution concentration is 1mol/L.
In the present invention, lithium salts is lithium hexafluoro phosphate (LiPF6)；The solvent of solution is EC (ethylene carbonate), EMC (carbonic acid
Methyl ethyl ester), DMC (dimethyl carbonate), EA (ethyl acetate) be combined, wherein EC and EMC dissolving lithium salts, DMC and EA reduce electrolysis
Fluid viscosity, raising lithium ion diffusion coefficient.
In the present invention, collector is aluminium foil, nickel screen or aluminum-plastic composite membrane.
The lithium ion battery that first aspect present invention is provided, the battery has high-rate charge-discharge capability and cyclical stability
Energy.
Second aspect present invention provides the preparation method of lithium ion battery, including：
Positive electrode active materials, binding agent are mixed with organic solvent, anode material for lithium-ion batteries is obtained after stirring；By lithium
Ion battery positive electrode is coated in the surface of collector, obtains positive plate；
Positive electrode active materials and binding agent disperse in organic solvent, and the quality of positive electrode active materials accounts for positive electrode active materials
With the 50%-95% of binding agent gross mass, positive electrode active materials include LiFePO4 and are coated on the graphite on LiFePO4 surface
Alkene, LiFePO4 is 1-100 with the mass ratio of Graphene:1；
Lithium ion battery negative material is coated in into the surface of collector, negative plate, lithium ion battery negative material is obtained
Including negative active core-shell material, negative active core-shell material includes at least one in native graphite, Delanium, soft carbon and hard carbon；
Positive plate, negative plate and barrier film are laminated and are wound, battery core is obtained, barrier film is arranged on positive plate and negative plate
Between, battery core is loaded in the receiving space of housing, electrolyte is injected, lithium ion battery is obtained after sealing.
In the present invention, the preparation method of positive electrode active materials, including：
Ferric lithium phosphate precursor and Graphene raw material are added in solvent, 2-5h is disperseed under ultrasound condition, after being dried,
Grapheme lithium iron phosphate presoma is obtained, LiFePO4 is 1-100 with the mass ratio of Graphene raw material:1；
Grapheme lithium iron phosphate presoma is placed in reducing atmosphere, at 500 DEG C -800 DEG C 5-12h is calcined, obtained just
Pole active material.
In the present invention, the preparation method of Graphene raw material is：Graphene oxide is provided, graphene oxide reduction is obtained into stone
Black alkene raw material.
In the present invention, graphene oxide can be commercially available or is obtained by improved Hummers chemical oxidization methods.
In the present invention, Graphene raw material is obtained using sodium borohydride reduction graphene oxide.
In the present invention, the preparation method of ferric lithium phosphate precursor is this area routine techniques, such as adopts high temperature solid-state legal system
It is standby etc., will not be described here.
In the present invention, ultrasonic power is 250W-500W.
In the present invention, solvent is ethanol or water.
In the present invention, dry temperature is 100 DEG C -120 DEG C.
In the present invention, with the programming rate of 5-20 DEG C/min 500 DEG C -800 DEG C are risen to.
In the present invention, with the programming rate of 5-10 DEG C/min 500 DEG C -800 DEG C are risen to.
In the present invention, with the programming rate of 5-10 DEG C/min 650 DEG C -700 DEG C are risen to.
In the present invention, reducing atmosphere includes hydrogen atmosphere.
In the present invention, the mixed method of positive electrode active materials, binding agent and organic solvent be binding agent is added to it is organic
In solvent, 2-5 hours are stirred in de-airing mixer, add positive electrode active materials, stir 2-5 hours, obtain lithium-ion electric
Pond positive electrode.
In the present invention, anode material for lithium-ion batteries also includes conductive agent, positive electrode active materials, conductive agent, binding agent
Quality accounts for respectively 70%-90%, 5%-20% and 5%-10% of positive electrode active materials, conductive agent and binding agent gross mass, has
The quality of machine solvent accounts for the 30%-70% of anode material for lithium-ion batteries gross mass.
In the present invention, the mixed method of positive electrode active materials, conductive agent, binding agent and organic solvent is：By binding agent plus
Enter in organic solvent, 2-5 hours are stirred in de-airing mixer, add conductive agent, continue to stir after 2-5 hours, then add
Enter positive electrode active materials, stir 2-5 hours, obtain anode material for lithium-ion batteries.
In the present invention, the temperature during triple mixing is 10 DEG C -50 DEG C, and mixing speed is rotation 1500-
2000rpm, revolve round the sun 20-30rpm.
In the present invention, Delanium includes carbonaceous mesophase spherules.
In the present invention, lithium ion battery negative material also includes conductive agent, binding agent and organic solvent, negative electrode active material
Material, conductive agent and binding agent disperse in organic solvent, negative active core-shell material, conductive agent and binding agent account for negative active core-shell material,
90%-97%, 0-3% and 2%-8% of conductive agent and binding agent gross mass, the quality of organic solvent accounts for lithium ion battery negative
The 30%-70% of material gross mass.
In the present invention, the preparation method of lithium ion battery negative material is：Binding agent is added in organic solvent, true
2-5 hours are stirred in empty mixer, conductive agent is added, continues to stir after 2-5 hours, add negative active core-shell material, stirred
2-5 hours, obtain lithium ion battery negative material.
In the present invention, the temperature during triple mixing is 10 DEG C -50 DEG C, and mixing speed is rotation 1500-
2000rpm, revolve round the sun 20-30rpm.
The preparation method of lithium ion battery that second aspect present invention is provided is very simple, and obtained lithium ion battery has height
Rate charge-discharge performance and stable circulation performance.
Embodiment 1：
A kind of preparation method of lithium ion battery, including：
(1) based lithium-ion battery positive plate is prepared
It is 100 according to mass ratio by ferric lithium phosphate precursor and Graphene raw material:1 ratio is added in ethanol, in work(
Rate after 100 DEG C of dryings, obtains grapheme lithium iron phosphate presoma to disperse 2h under the ultrasound condition of 250W；
Grapheme lithium iron phosphate presoma is placed in hydrogen atmosphere, 500 DEG C is risen to the programming rate of 5 DEG C/min, so
After calcine 12h, obtain positive electrode active materials.
Add in the middle addition 25.0g Kynoar (PVDF) of 500g N-2- methyl pyrrolidones (NMP), after stirring 4 hours
Enter 25.0g electrically conductive graphites, stirring adds 450g positive electrode active materials, stirs 4 hours after 2 hours, obtains lithium ion cell positive
Material.Wherein, the temperature during triple mixing is 30 DEG C, and mixing speed is rotation 2000rpm, and revolve round the sun 30rpm；By lithium
Ion battery positive electrode is coated in the surface of collector, obtains positive plate；
(2) anode plate for lithium ionic cell is prepared
Add in the middle addition 40.0g Kynoar (PVDF) of 500g N-2- methyl pyrrolidones (NMP), after stirring 4 hours
Enter 10.0g electrically conductive graphites, stirring adds 450g native graphites, stirs 4 hours after 2 hours, obtains lithium ion battery negative material；
Lithium ion battery negative material is coated in into the surface of collector, negative plate is obtained；
Positive plate, negative plate and barrier film are laminated and are wound, battery core is obtained, barrier film is arranged on positive plate and negative plate
Between, battery core is loaded in the receiving space of housing, electrolyte is injected, lithium ion battery is obtained after sealing.
By scanning electron microscopic observation, the number of plies of the Graphene of positive electrode active materials is about 5-6 layers obtained in the present embodiment.
Embodiment 2：
A kind of preparation method of lithium ion battery, including：
(1) based lithium-ion battery positive plate is prepared
It is 50 according to mass ratio by ferric lithium phosphate precursor and Graphene raw material:1 ratio is added in ethanol, in power
To disperse 5h under the ultrasound condition of 500W, after 120 DEG C of dryings, grapheme lithium iron phosphate presoma is obtained；
Grapheme lithium iron phosphate presoma is placed in hydrogen atmosphere, 600 DEG C is risen to the programming rate of 10 DEG C/min, so
After calcine 8h, obtain positive electrode active materials.
Add in the middle addition 21.4g Kynoar (PVDF) of 500g N-2- methyl pyrrolidones (NMP), after stirring 2 hours
Enter 42.9g conductive carbon blacks, stirring adds 171.5g positive electrode active materials, stirring obtaining lithium ion battery just after 2 hours after 2 hours
Pole material.Temperature during triple mixing is 30 DEG C, and mixing speed is rotation 1500rpm, and revolve round the sun 20rpm；By lithium from
Sub- cell positive material is coated in the surface of collector, obtains positive plate；
(2) anode plate for lithium ionic cell is prepared
Add in the middle addition 21.4g Kynoar (PVDF) of 500g N-2- methyl pyrrolidones (NMP), after stirring 2 hours
Enter 252.2g Delaniums, stirring obtains anode material for lithium-ion batteries after 2 hours.Temperature during triple mixing is 30
DEG C, mixing speed is rotation 1500rpm, and revolve round the sun 20rpm.Lithium ion battery negative material is coated in into the surface of collector,
Obtain negative plate；
(3) lithium ion battery is prepared
Positive plate, negative plate and barrier film are laminated and are wound, battery core is obtained, barrier film is arranged on positive plate and negative plate
Between, battery core is loaded in the receiving space of housing, electrolyte is injected, lithium ion battery is obtained after sealing.
Embodiment 3：
A kind of preparation method of lithium ion battery, including：
(1) based lithium-ion battery positive plate is prepared
It is 80 according to mass ratio by ferric lithium phosphate precursor and Graphene raw material:1 ratio is added in ethanol, in power
To disperse 4h under the ultrasound condition of 300W, after 100 DEG C of dryings, grapheme lithium iron phosphate presoma is obtained；
Grapheme lithium iron phosphate presoma is placed in hydrogen atmosphere, 800 DEG C is risen to the programming rate of 20 DEG C/min, so
After calcine 5h, obtain positive electrode active materials.
Add in the middle addition 36.7g Kynoar (PVDF) of 500g N,N-dimethylformamides (DMF), after stirring 2 hours
Enter 61.1g conductive agent carbon fibers, stirring adds 513.3g positive electrode active materials, stirring that lithium-ion electric is obtained after 5 hours after 3 hours
Pond positive electrode.Temperature during triple mixing is 30 DEG C, and mixing speed is rotation 2000rpm, and revolve round the sun 25rpm.Will
Anode material for lithium-ion batteries is coated in the surface of collector, obtains positive plate；
(2) anode plate for lithium ionic cell is prepared
Add in the middle addition 36.7g Kynoar (PVDF) of 500g N,N-dimethylformamides (DMF), after stirring 2 hours
Enter 21.1g conductive agent carbon fibers, stirring adds 513.3g soft carbons, stirring that lithium ion battery negative material is obtained after 5 hours after 3 hours
Material.Temperature during triple mixing is 30 DEG C, and mixing speed is rotation 2000rpm, and revolve round the sun 25rpm.By lithium-ion electric
Pond negative material is coated in the surface of collector, obtains negative plate；
(3) lithium ion battery is prepared
Positive plate, negative plate and barrier film are laminated and are wound, battery core is obtained, barrier film is arranged on positive plate and negative plate
Between, battery core is loaded in the receiving space of housing, electrolyte is injected, lithium ion battery is obtained after sealing.
Embodiment 4：
A kind of preparation method of lithium ion battery, including：
(1) based lithium-ion battery positive plate is prepared
It is 1 according to mass ratio by ferric lithium phosphate precursor and Graphene raw material:1 ratio is added in ethanol, in power
To disperse 4h under the ultrasound condition of 300W, after 100 DEG C of dryings, grapheme lithium iron phosphate presoma is obtained；
Grapheme lithium iron phosphate presoma is placed in hydrogen atmosphere, 800 DEG C is risen to the programming rate of 20 DEG C/min, so
After calcine 5h, obtain positive electrode active materials.
Add in the middle addition 93.3g Kynoar (PVDF) of 500g N,N-dimethylformamides (DMF), after stirring 5 hours
Enter 140.0g conductive agent carbon fibers, stirring adds 933.4g positive electrode active materials, stirring that lithium ion is obtained after 4 hours after 2 hours
Cell positive material.Temperature during triple mixing is 30 DEG C, and mixing speed is rotation 1800rpm, and revolve round the sun 20rpm.
Anode material for lithium-ion batteries is coated in into the surface of collector, positive plate is obtained；
(2) anode plate for lithium ionic cell is prepared
Add in the middle addition 63.3g Kynoar (PVDF) of 500g N,N-dimethylformamides (DMF), after stirring 5 hours
Enter 30.0g conductive agent carbon fibers, stirring adds 945.4g hard carbons, stirring that lithium ion cell positive material is obtained after 4 hours after 2 hours
Material.Temperature during triple mixing is 30 DEG C, and mixing speed is rotation 1800rpm, and revolve round the sun 20rpm.By lithium-ion electric
Pond positive electrode is coated in the surface of collector, obtains positive plate；
(3) lithium ion battery is prepared
Positive plate, negative plate and barrier film are laminated and are wound, battery core is obtained, barrier film is arranged on positive plate and negative plate
Between, battery core is loaded in the receiving space of housing, electrolyte is injected, lithium ion battery is obtained after sealing.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of lithium ion battery, it is characterised in that described including positive plate, negative plate, barrier film, nonaqueous electrolytic solution and housing
Positive plate, the negative plate, the barrier film and the nonaqueous electrolytic solution are contained in the receiving space that the housing is formed；
The positive plate includes collector and is coated in the anode material for lithium-ion batteries of the collection liquid surface, the lithium ion
Cell positive material includes positive electrode active materials, binding agent and organic solvent, the positive electrode active materials and the binding agent point
In being dispersed in the organic solvent, the quality of the positive electrode active materials accounts for the positive electrode active materials and the binding agent gross mass
50%-95%, the positive electrode active materials include LiFePO4 and are coated on the Graphene on the LiFePO4 surface, described
LiFePO4 is 1-100 with the mass ratio of the Graphene:1；
The negative plate includes collector and is coated in the lithium ion battery negative material of the collection liquid surface, the lithium ion
Cell negative electrode material includes negative active core-shell material, and the negative active core-shell material includes native graphite, Delanium, soft carbon and hard carbon
In at least one.
2. lithium ion battery as claimed in claim 1, it is characterised in that the mass ratio of the LiFePO4 and the Graphene
For 50-80:1.
3. lithium ion battery as claimed in claim 1, it is characterised in that described to be coated on the lithium iron phosphate particles surface
The number of plies of Graphene is 5-10 layers.
4. lithium ion battery as claimed in claim 1, it is characterised in that the anode material for lithium-ion batteries also includes conduction
Agent, the positive electrode active materials, the conductive agent, the quality of the binding agent account for respectively the positive electrode active materials, described lead
Electric agent and 70%-90%, 5%-20% and 5%-10% of the binding agent gross mass, the quality of the organic solvent accounts for described
The 30%-70% of anode material for lithium-ion batteries gross mass.
5. a kind of preparation method of lithium ion battery, it is characterised in that include：
Positive electrode active materials, binding agent are mixed with organic solvent, anode material for lithium-ion batteries is obtained after stirring；By lithium ion
Cell positive material is coated in the surface of the collector, obtains positive plate；
The positive electrode active materials and the binding agent are dispersed in the organic solvent, and the quality of the positive electrode active materials is accounted for
The 50%-95% of the positive electrode active materials and the binding agent gross mass, the positive electrode active materials include LiFePO4 and
The Graphene on the LiFePO4 surface is coated on, the LiFePO4 is 1-100 with the mass ratio of the Graphene:1；
Lithium ion battery negative material is coated in into the surface of the collector, negative plate, the lithium ion battery negative is obtained
Material includes negative active core-shell material, and the negative active core-shell material is included in native graphite, Delanium, soft carbon and hard carbon at least
It is a kind of；
The positive plate, the negative plate and barrier film are laminated and are wound, battery core is obtained, the barrier film is arranged on positive plate
And negative plate between, the battery core is loaded in the receiving space of housing, inject electrolyte, lithium ion battery is obtained after sealing.
6. the preparation method of lithium ion battery as claimed in claim 5, it is characterised in that the positive electrode active materials, bonding
Agent is that the binding agent is added in organic solvent with the mixed method of organic solvent, 2-5 is stirred in de-airing mixer little
When, the positive electrode active materials are added, 2-5 hours are stirred, obtain anode material for lithium-ion batteries.
7. the preparation method of lithium ion battery as claimed in claim 5, it is characterised in that the anode material for lithium-ion batteries
Also include conductive agent, the positive electrode active materials, conductive agent, the quality of binding agent account for respectively the positive electrode active materials, conduction
Agent and 70%-90%, 5%-20% and 5%-10% of binding agent gross mass, the quality of the organic solvent accounts for the lithium ion
The 30%-70% of cell positive material gross mass.
8. the preparation method of lithium ion battery as claimed in claim 7, it is characterised in that the positive electrode active materials, conduction
The mixed method of agent, binding agent and organic solvent is：The binding agent is added in organic solvent, is stirred in de-airing mixer
2-5 hours are mixed, the conductive agent is added, continues to stir after 2-5 hours, add the positive electrode active materials, 2-5 is little for stirring
When, obtain anode material for lithium-ion batteries.
9. the preparation method of lithium ion battery as claimed in claim 5, it is characterised in that the preparation of the positive electrode active materials
Method, including：
Ferric lithium phosphate precursor and Graphene raw material are added in solvent, 2-5h is disperseed under ultrasound condition, after being dried, obtained
Grapheme lithium iron phosphate presoma, the LiFePO4 is 1-100 with the mass ratio of the Graphene raw material:1；
The grapheme lithium iron phosphate presoma is placed in reducing atmosphere, at 500 DEG C -800 DEG C 5-12h is calcined, obtain institute
State positive electrode active materials.
10. the preparation method of lithium ion battery as claimed in claim 9, it is characterised in that with the intensification speed of 5-20 DEG C/min
Degree rises to described 500 DEG C -800 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107180954A (en) * | 2017-05-24 | 2017-09-19 | 张廷祥 | A kind of ultra-thin graphite alkene lithium ion single battery and graphene lithium ion battery group |
| CN107204484A (en) * | 2017-05-25 | 2017-09-26 | 全球能源互联网研究院 | A kind of lithium-ion capacitor battery |
| CN107591514A (en) * | 2017-09-05 | 2018-01-16 | 沈阳理工大学 | A kind of preparation method of iron-phosphate-based lithium-ion battery positive plate |
| CN114142019A (en) * | 2021-05-19 | 2022-03-04 | 宁夏汉尧石墨烯储能材料科技有限公司 | Lithium ion battery electrode coated with nano-grade modified polycrystalline anode material |
| CN114430039A (en) * | 2020-10-28 | 2022-05-03 | 比亚迪股份有限公司 | Lithium ion battery and power vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315423A (en) * | 2010-07-08 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所 | Graphene/lithium iron phosphate compound anode material, preparation method thereof and lithium ion secondary battery |
| TW201438985A (en) * | 2013-04-15 | 2014-10-16 | Formosa Biomedical Technology Corp | Process for producing LVF/C composite material and use the same |
| CN104577130A (en) * | 2014-12-13 | 2015-04-29 | 山东神工海特电子科技有限公司 | Flexible-packaged high-power lithium iron phosphate power battery |
| CN105390738A (en) * | 2015-12-01 | 2016-03-09 | 王立军 | Graphene modified lithium ion battery and manufacturing method therefor |
-
2016
- 2016-11-23 CN CN201611046762.0A patent/CN106654195A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315423A (en) * | 2010-07-08 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所 | Graphene/lithium iron phosphate compound anode material, preparation method thereof and lithium ion secondary battery |
| TW201438985A (en) * | 2013-04-15 | 2014-10-16 | Formosa Biomedical Technology Corp | Process for producing LVF/C composite material and use the same |
| CN104577130A (en) * | 2014-12-13 | 2015-04-29 | 山东神工海特电子科技有限公司 | Flexible-packaged high-power lithium iron phosphate power battery |
| CN105390738A (en) * | 2015-12-01 | 2016-03-09 | 王立军 | Graphene modified lithium ion battery and manufacturing method therefor |
Non-Patent Citations (1)
| Title |
|---|
| 王丽君等: ""含分散剂碳纳米管导电浆液对锂离子电池性能的改善"", 《石油化工应用》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107180954A (en) * | 2017-05-24 | 2017-09-19 | 张廷祥 | A kind of ultra-thin graphite alkene lithium ion single battery and graphene lithium ion battery group |
| CN107204484A (en) * | 2017-05-25 | 2017-09-26 | 全球能源互联网研究院 | A kind of lithium-ion capacitor battery |
| CN107591514A (en) * | 2017-09-05 | 2018-01-16 | 沈阳理工大学 | A kind of preparation method of iron-phosphate-based lithium-ion battery positive plate |
| CN114430039A (en) * | 2020-10-28 | 2022-05-03 | 比亚迪股份有限公司 | Lithium ion battery and power vehicle |
| CN114430039B (en) * | 2020-10-28 | 2023-08-08 | 比亚迪股份有限公司 | Lithium ion battery and power vehicle |
| CN114142019A (en) * | 2021-05-19 | 2022-03-04 | 宁夏汉尧石墨烯储能材料科技有限公司 | Lithium ion battery electrode coated with nano-grade modified polycrystalline anode material |
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