CN107482167A - high temperature lithium cell positive pole and preparation method thereof - Google Patents

high temperature lithium cell positive pole and preparation method thereof Download PDF

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Publication number
CN107482167A
CN107482167A CN201710600462.0A CN201710600462A CN107482167A CN 107482167 A CN107482167 A CN 107482167A CN 201710600462 A CN201710600462 A CN 201710600462A CN 107482167 A CN107482167 A CN 107482167A
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graphene
multilayer chip
diamond
layer
battery
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许驩鑫
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Kunshan State Is New Energy Power Battery Co Ltd
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Kunshan State Is New Energy Power Battery Co Ltd
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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
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • 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
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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
    • H01M4/139—Processes of manufacture
    • H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • 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
    • H01M4/139—Processes of manufacture
    • H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • 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
    • H01M4/364—Composites as mixtures
    • 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
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • 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
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention provides a kind of High Temperature Lithium Cell positive pole and preparation method thereof, including major ingredient, solvent and additive, the major ingredient is LiFePO4 or ternary, and the solvent is NMP, and additive includes PVDF, SP, KS 6 and multi-layer graphene；Multi-layer graphene accounts for the 5 8% of positive pole gross mass；Multi-layer graphene includes multilayer chip graphene and diamond, and diamond is located between adjacent two layers of multilayer chip graphene, and the carbon atom of diamond and described multilayer chip graphene corresponds.The present invention adds multi-layer graphene in the positive pole of lithium battery, increase the thermal conductivity of battery, in the higher environment of temperature, battery container can be transferred heat to faster outwards to dissipate, reduce internal temperature of battery and tend towards stability, simultaneously, good electric conductivity can effectively reduce the internal resistance of battery, battery is reduced temperature rise at work, and battery is adapted to the high temperature of 75 DEG C of highest, the security that lithium battery uses is improved simultaneously, and is increased the service life.

Description

High Temperature Lithium Cell positive pole and preparation method thereof
Technical field
The present invention relates to technical field of lithium batteries, more particularly, to a kind of High Temperature Lithium Cell positive pole and preparation method thereof.
Background technology
Lithium ion battery:It is a kind of secondary cell (rechargeable battery), it relies primarily on lithium ion between a positive electrode and a negative electrode Movement carrys out work.In charge and discharge process, Li+ comes and goes insertion and deintercalation between two electrodes:During charging, Li+ takes off from positive pole It is embedding, negative pole is embedded in by electrolyte, negative pole is in rich lithium state；It is then opposite during electric discharge.The electrolyte according to used in lithium ion battery The difference of material, lithium ion battery are divided into liquid lithium ionic cell and polymer Li-ion battery.Wherein, liquid lithium ionic cell Refer to the secondary cell that Li+ inlaid schemes are positive and negative electrode.Positive pole uses lithium compound, and negative pole uses chemical combination between lithium-carbon-coating Thing.The normal operating temperature range of lithium ion battery is -20 DEG C~60 DEG C, and the aging speed of lithium battery is affected by temperature, lithium electricity The rise of pond internal temperature, lithium battery internal resistance is raised, so as to cause the decline of battery capacity, and then shortens making for lithium battery With the life-span, temperature is too high or even can explode.Therefore, those skilled in the art try to explore, to develop a kind of new material Material widens the operating temperature range of lithium ion battery, make lithium ion battery can in the environment of higher than 60 DEG C normal work.
The content of the invention
The present invention solves the technical problem of a kind of High Temperature Lithium Cell positive pole and preparation method thereof is provided, by multilayer stone Black alkene is added in the positive pole of lithium battery, is increased the thermal conductivity of battery, in the higher environment of temperature, battery can be made to exist Heat balance can be transmitted faster in work, battery container can also be transferred heat to faster outwards to dissipate, made Internal temperature of battery is reduced and tended towards stability, meanwhile, good electric conductivity can effectively reduce the internal resistance of battery, make battery Temperature rise can be reduced at work, battery is adapted to the high temperature of 75 DEG C of highest, while improves the security that lithium battery uses, and Increase the service life.
In order to solve the above technical problems, one aspect of the present invention is：A kind of High Temperature Lithium Cell positive pole and its Preparation method, including major ingredient, solvent and additive, the major ingredient are LiFePO4 or ternary, and the solvent is NMP (N- methyl Pyrrolidones), the additive includes PVDF (Kynoar), SP (ultra-fine carbon dust), KS-6 (graphite agent) and multilayer Graphene；
The weight percentage of each component is as follows：The weight percentage of each component is as follows：The major ingredient be 40-44%, The NMP is 46-50%, the PVDF is 2-3%, the SP is 1-2%, the KS-6 is 1-2% and the Multi-layer graphite Alkene is 5-8%；
The multi-layer graphene includes multilayer chip graphene and diamond, and the diamond is located at multilayer chip graphene Adjacent two layers between, the carbon atom of the diamond and described multilayer chip graphene corresponds；
The weight ratio of the multilayer chip graphene and the diamond is (4-6)：1；
The multilayer chip graphene is 6-8 lamellar graphenes, and every layer of thickness of the multilayer chip graphene is 0.3-1.0nm, the interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.1-0.5nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7-1.6nm.
Further say, the weight ratio of the multilayer chip graphene and the diamond is 5:1；
The number of plies of the multilayer chip graphene is 8 lamellar graphenes, every layer of thickness of the multilayer chip graphene Spend for 0.5nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.3nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.9nm.
Further say, the preparation method of the multi-layer graphene, comprise the following steps：
Step 1: multilayer chip graphene is prepared using chemical deposition：With cathode-ray on silica substrate surface One layer of nickel metal layer is deposited, the thickness of the nickel metal layer is 200-400nm；
Step 2: be passed through in the tube furnace of 950-1150 DEG C of temperature methane, hydrogen and ammonia composition gaseous mixture and Common graphite powder, room temperature is cooled within 100ms, obtains multilayer chip graphene, the layer of multilayer chip graphene described herein Number is 3-12 layers；
Step 3: more than 100,000 grades under cleanliness factor environment, by being peeled off after electron microscope observation with molecular knife, screening Go out 6-8 lamellar graphenes；
Step 4: the 6-8 lamellars graphene that step 3 filters out is mixed in proportion with diamond, in 100-200Pa Vacuum condition and 600-800 DEG C of hot conditions under, at the uniform velocity stir 34-38h, get product.
Present invention also offers a kind of preparation method of High Temperature Lithium Cell positive pole, carry out in accordance with the following steps：
Step a, by major ingredient, NMP and PVDF, it is added in agitator, is evacuated to -0.08~-0.09MPa, keeps true 3.5-4.5h is stirred in the case of sky, it is cmpletely dissolved, produces mixture；
Step b, SP, KS-6 and multi-layer graphene are added in the mixture obtained by step a；It is evacuated to -0.08~- 0.09MPa, keep stirring 2-4h in the case of vacuum, reach 8000~12000MPas to viscosity, produce anode sizing agent.
The beneficial effects of the invention are as follows：
Positive electrode is the new material of 6-8 layer graphenes and doped diamond in the present invention, and diamond is Spherical Carbon, The bridge between mutual lamella is served as during being combined with multilayer chip graphene so that led between every layer of multi-layer graphene It is logical, greatly increase the thermal conductivity performance of battery；Multi-layer graphene is added positive pole material by the present invention with 5%-8% ratio In material, in hot environment, due to the good heat conductivity of multi-layer graphene, can make battery at work can faster by Heat balance transmission, battery container can also be transferred heat to faster outwards to dissipate, make internal temperature of battery reduce and Tend towards stability, meanwhile, good electric conductivity can effectively reduce the internal resistance of battery, battery is reduced temperature at work Rise, battery is adapted to the high temperature of 75 DEG C of highest, while improves the security that lithium battery uses, and increases the service life.
Brief description of the drawings
Fig. 1 is the structural representation of the multi-layer graphene of the present invention；
Each several part mark is as follows in accompanying drawing：
Multi-layer graphene 100, multilayer chip graphene 101, carbon atom 102 and diamond 103.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.Without departing substantially from spirit of the invention In the case of essence, the modifications or substitutions made to the inventive method, step or condition, the protection model of the present invention is belonged to Enclose.
A kind of High Temperature Lithium Cell positive pole and preparation method thereof, including major ingredient, solvent and additive, the major ingredient are ferric phosphate Lithium or ternary, the solvent are NMP, and the additive includes PVDF, SP, KS-6 and multi-layer graphene 100；
The weight percentage of each component is as follows：The weight percentage of each component is as follows：The major ingredient be 40-44%, The NMP is 46-50%, the PVDF is 2-3%, the SP is 1-2%, the KS-6 is 1-2% and the Multi-layer graphite Alkene is 5-8%；
As shown in figure 1, the multi-layer graphene 100 includes multilayer chip graphene 101 and diamond 103, the Buddha's warrior attendant Stone is located between adjacent two layers of multilayer chip graphene, the carbon atom of the diamond and described multilayer chip graphene 102 correspond；
The weight ratio of the multilayer chip graphene 101 and the diamond 103 is (4-6)：1；
The multilayer chip graphene 101 is 6-8 lamellar graphenes, every layer of the multilayer chip graphene 101 Thickness is 0.3-1.0nm, and the interlamellar spacing of the adjacent two layers of the multilayer chip graphene 101 is 0.1-0.5nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7-1.6nm.
Embodiment 1：The major ingredient is 44%, the NMP is 46%, the PVDF is 2.2%, the SP is 1.6%, institute State that KS-6 is 1.2% and the multi-layer graphene is 5%；
The weight ratio of the multilayer chip graphene and the diamond is 5：1；
The number of plies of the multilayer chip graphene is 8 lamellar graphenes, every layer of thickness of the multilayer chip graphene Spend for 0.5nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.3nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.9nm.
Embodiment 2：The major ingredient is 40%, the NMP is 48%, the PVDF is 2.5%, the SP is 2%, described KS-6 is 1.5% and the multi-layer graphene is 6%；
The weight ratio of the multilayer chip graphene and the diamond is 4：1；
The number of plies of the multilayer chip graphene is 8 lamellar graphenes, every layer of thickness of the multilayer chip graphene Spend for 0.3nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.4nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 1.2nm.
Embodiment 3：The major ingredient is 41%, the NMP is 46%, the PVDF is 2.5%, the SP is 1.5%, institute State that KS-6 is 1% and the multi-layer graphene is 8%；
The weight ratio of the multilayer chip graphene and the diamond is 6：1；
The number of plies of the multilayer chip graphene is 7 lamellar graphenes, every layer of thickness of the multilayer chip graphene Spend for 0.6nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.5nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 1.6nm.
Embodiment 4：The major ingredient is 42%, the NMP is 47%, the PVDF is 3%, the SP is 1%, described KS-6 is 2% and the multi-layer graphene is 5%；
The weight ratio of the multilayer chip graphene and the diamond is 4.5：1；
The number of plies of the multilayer chip graphene is 6 lamellar graphenes, every layer of thickness of the multilayer chip graphene Spend for 0.7nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.2nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 1.0nm.
Embodiment 5：The major ingredient is 40%, the NMP is 50%, the PVDF is 2%, the SP is 1.3%, described KS-6 is 1.7% and the multi-layer graphene is 5%；
The weight ratio of the multilayer chip graphene and the diamond is 5.5：1；
The number of plies of the multilayer chip graphene is 6 lamellar graphenes, every layer of thickness of the multilayer chip graphene Spend for 0.4nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.1nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7nm.
Embodiments of the invention 1 are carried out in accordance with the following steps to the preparation method of the multi-layer graphene described in embodiment 5：
Step 1: multilayer chip graphene is prepared using chemical deposition：With cathode-ray on silica substrate surface One layer of nickel metal layer is deposited, the thickness of the nickel metal layer is 200-400nm；
Step 2: be passed through in the tube furnace of 950-1150 DEG C of temperature methane, hydrogen and ammonia composition gaseous mixture and Common graphite powder, room temperature is cooled within 100ms, obtains multilayer chip graphene, the layer of multilayer chip graphene described herein Number is 3-12 layers；
Step 3: more than 100,000 grades under cleanliness factor environment, by being peeled off after electron microscope observation with molecular knife, screening Go out 6-8 lamellar graphenes；
Step 4: the 6-8 lamellars graphene that step 3 filters out is mixed in proportion with diamond, in 100-200Pa Vacuum condition and 600-800 DEG C of hot conditions under, at the uniform velocity stir 34-38h, get product.
In the present embodiment preferably, the thickness of the nickel metal layer is 300nm.
Embodiments of the invention 1 enter in accordance with the following steps to the preparation method of the High Temperature Lithium Cell positive pole described in embodiment 5 OK：
Step a, by major ingredient, NMP and PVDF, it is added in agitator, is evacuated to -0.08~-0.09MPa, keeps true 3.5-4.5h is stirred in the case of sky, it is cmpletely dissolved, produces mixture；
Step b, SP, KS-6 and multi-layer graphene are added in the mixture obtained by step a；It is evacuated to -0.08~- 0.09MPa, keep stirring 2-4h in the case of vacuum, reach 8000~12000MPas to viscosity, produce anode sizing agent.
The present invention adds multi-layer graphene in positive electrode with 5%-8% ratio, in hot environment, due to multilayer The good heat conductivity of graphene, can be such that battery faster can transmits heat balance at work, can also be faster Battery container is transferred heat to outwards to dissipate, internal temperature of battery is reduced and tends towards stability, meanwhile, good electric conductivity The internal resistance of battery can be effectively reduced, battery is reduced temperature rise at work, battery is adapted to 75 DEG C of highest High temperature, while the security that lithium battery uses is improved, and increase the service life.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or Change.Here without exhaustive.And the obvious changes or variations thus extended out is still in the protection of the invention Among scope.

Claims (4)

  1. A kind of 1. High Temperature Lithium Cell positive pole, it is characterised in that：Including major ingredient, solvent and additive, the major ingredient is LiFePO4 Or ternary, the solvent are NMP, the additive includes PVDF, SP, KS-6 and multi-layer graphene；
    The weight percentage of each component is as follows：The major ingredient is 40-44%, the NMP is 46-50%, the PVDF is 2- 3%th, the SP is 1-2%, the KS-6 is 1-2% and the multi-layer graphene is 5-8%；
    The multi-layer graphene includes multilayer chip graphene and diamond, and the diamond is located at the phase of multilayer chip graphene Between adjacent two layers, the carbon atom of the diamond and described multilayer chip graphene corresponds；
    The weight ratio of the multilayer chip graphene and the diamond is (4-6)：1；
    The multilayer chip graphene is 6-8 lamellar graphenes, and every layer of thickness of the multilayer chip graphene is 0.3- 1.0nm, the interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.1-0.5nm；
    The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7-1.6nm.
  2. 2. High Temperature Lithium Cell according to claim 1 is just, it is characterised in that：The multilayer chip graphene and the Buddha's warrior attendant The weight ratio of stone is 5：1；
    The number of plies of the multilayer chip graphene is 8 lamellar graphenes, and every layer of thickness of the multilayer chip graphene is 0.5nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.3nm；
    The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.9nm.
  3. 3. High Temperature Lithium Cell positive pole according to claim 1, it is characterised in that：The preparation method of the multi-layer graphene, Comprise the following steps：
    Step 1: multilayer chip graphene is prepared using chemical deposition：Deposited with cathode-ray on silica substrate surface One layer of nickel metal layer, the thickness of the nickel metal layer is 200-400nm；
    Step 2: methane, the gaseous mixture of hydrogen and ammonia composition and common are passed through in the tube furnace of 950-1150 DEG C of temperature Graphite powder, room temperature is cooled within 100ms, obtains multilayer chip graphene, the number of plies of multilayer chip graphene described herein is 3-12 layers；
    Step 3: more than 100,000 grades under cleanliness factor environment, by being peeled off after electron microscope observation with molecular knife, 6- is filtered out 8 lamellar graphenes；
    Step 4: the 6-8 lamellars graphene that step 3 filters out is mixed in proportion with diamond, in the true of 100-200Pa Under empty condition and 600-800 DEG C of hot conditions, 34-38h is at the uniform velocity stirred, is got product.
  4. A kind of 4. preparation method of High Temperature Lithium Cell positive pole according to claim 1, it is characterised in that：In accordance with the following steps Carry out：
    Step a, by major ingredient, NMP and PVDF, it is added in agitator, is evacuated to -0.08~-0.09MPa, keeps vacuum In the case of stir 3.5-4.5h, it is cmpletely dissolved, produce mixture；
    Step b, SP, KS-6 and multi-layer graphene are added in the mixture obtained by step a；It is evacuated to -0.08~- 0.09MPa, keep stirring 2-4h in the case of vacuum, reach 8000~12000MPas to viscosity, produce anode sizing agent.
CN201710600462.0A 2017-07-21 2017-07-21 high temperature lithium cell positive pole and preparation method thereof Pending CN107482167A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108470913A (en) * 2018-05-24 2018-08-31 江苏芯界新能源科技有限公司 A kind of High Temperature Lithium Cell anode and preparation method thereof
CN108520960A (en) * 2018-06-01 2018-09-11 江苏芯界新能源科技有限公司 A kind of additive of anode sizing agent and preparation method thereof
CN109004228A (en) * 2018-08-03 2018-12-14 江苏芯界新能源科技有限公司 The preparation method of lithium ion cell positive substrate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108470913A (en) * 2018-05-24 2018-08-31 江苏芯界新能源科技有限公司 A kind of High Temperature Lithium Cell anode and preparation method thereof
CN108520960A (en) * 2018-06-01 2018-09-11 江苏芯界新能源科技有限公司 A kind of additive of anode sizing agent and preparation method thereof
CN109004228A (en) * 2018-08-03 2018-12-14 江苏芯界新能源科技有限公司 The preparation method of lithium ion cell positive substrate

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