CN107546389A - Anode sizing agent and preparation method containing secondary layer graphene - Google Patents
Anode sizing agent and preparation method containing secondary layer graphene Download PDFInfo
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- CN107546389A CN107546389A CN201710600467.3A CN201710600467A CN107546389A CN 107546389 A CN107546389 A CN 107546389A CN 201710600467 A CN201710600467 A CN 201710600467A CN 107546389 A CN107546389 A CN 107546389A
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a kind of anode sizing agent and preparation method containing secondary layer graphene, including major ingredient, solvent and additive, the weight percentage of each component are as follows：Major ingredient is 56 59%, NMP is 21 24%, PVDF is 2 3.5%, SP is 15 17% and secondary layer graphene is 0.7 1.2%；Wherein secondary 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 multilayer chip graphene corresponds；The weight of multilayer chip graphene and diamond ratio is 18 19:1；Reasonable mixture ratio of the present invention, thermal conductivity is good, wherein secondary layer graphene is the new material of 35 lamellar graphenes and doped diamond, and the diamond added is Spherical Carbon so that is turned between the adjacent two layers of multilayer chip graphene, improves material conductivity；Therefore the present invention increases thermal conductivity in the case where not changing battery other structures, and caused heat is shed in time in generating, battery is effectively reduced energy consumption during larger current is discharged.
Description
Technical field
The present invention relates to lithium ion battery anode sizing agent and its preparing technical field, more particularly to one kind contains graphene
The anode sizing agent and preparation method of new material.
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+Insertion and deintercalation are come and gone between two electrodes：During charging, Li+Taken 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.Battery, which typically uses, contains elemental lithium
Material is the representative of modern high performance battery as electrode.
At present, Study on Li-ion batteries is increasingly extensive, and the lithium ion battery as secondary green battery is shown than other
Battery has the advantages of incomparable, and voltage platform is high, pollution-free, high-energy-density, small volume and in light weight etc..Current lithium ion
Battery is mainly used in low discharging current, but due to the development of electric automobile etc., the performance of lithium ion battery is proposed higher
It is required that.By taking electric automobile as an example, consumer is exactly speed to an important evaluation index of electric automobile, if speed wants high,
The power of battery will be big, i.e. the electric current of battery is big, and heat production is more.
And the positive electrode of the lithium ion battery of prior art is generally ternary and LiFePO4, the graphene addition of addition
Agent is also common graphite alkene, and as sheet carbon structure, structure has good heat conduction and conductive effect in lamella, and in piece
Due to the presence of dirac point (electroneutral point) between layer so that be nearly at state of isolation between mutual lamella, electric current it is big,
In the case that heat production is more, it is impossible to heat sheds in time, potential safety hazard be present, or even explodes, causes personal injury, very
It is dangerous.
Therefore the lithium ion battery material with high magnification heavy-current discharge performance is urgently studied, to adapt to the need in market
Will.
The content of the invention
The present invention solves the technical problem of a kind of anode sizing agent containing secondary layer graphene is provided, reasonable mixture ratio, lead
Hot good, wherein secondary layer graphene is the new material of 3-5 lamellars graphene and doped diamond, and the diamond added is
Spherical Carbon so that turned between the adjacent two layers of multilayer chip graphene, improve material conductivity；Therefore the present invention is not changing electricity
In the case of the other structures of pond, increase thermal conductivity, and caused heat is shed in time during cell power generation, make battery compared with
Energy consumption can be effectively reduced during heavy-current discharge, and extends battery life.
In order to solve the above technical problems, one aspect of the present invention is：There is provided a kind of containing secondary layer graphene
Anode sizing agent, including major ingredient, solvent and additive, the major ingredient are LiFePO4 or ternary, and the solvent is NMP, described to add
Agent is added to include PVDF, SP and secondary layer graphene；
The weight percentage of each component is as follows：The major ingredient is 56-59%, the NMP is 21-24%, the PVDF
For 2-3.5%, the SP be 15-17% and the secondary layer graphene is 0.7-1.2%；
The secondary 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 18-19:1；
The multilayer chip graphene is 3-5 lamellar graphenes, and every layer of thickness of the multilayer chip graphene is
0.2-0.5nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.2-0.4nm；
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 18.5:1；
The number of plies of the multilayer chip graphene is 5 layers, 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.
Further say, the preparation method of the secondary layer graphene is carried out in accordance with 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, and room temperature is cooled within 100ms rapidly, obtain multilayer chip graphene, multilayer chip stone described herein
The number of plies of black alkene is 3-12 layers；
Step 3: more than 100,000 grades under cleanliness factor environment, by separating 3-5 with molecular knife after electron microscope observation
Lamellar graphene；
Step 4: the 3-5 lamellars graphene that step 3 separates is mixed in proportion with diamond, in vacuum 100-
Under 200Pa, 600-800 DEG C of high temperature, 34-38h is stirred, is got product.
Present invention also offers a kind of preparation method of the anode sizing agent containing secondary layer graphene, in accordance with the following steps
Carry out：
Step a, major ingredient, NMP and PVDF are added in agitator, are evacuated to -0.08~-0.09MPa, keep vacuum
In the case of stir 3.5-4.5h, it is cmpletely dissolved, produce mixture；
Step b, SP and secondary layer graphene are proportionally added into the mixture described in 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 the positive pole slurry
Material.
The beneficial effects of the invention are as follows：
The anode sizing agent of the present invention includes LiFePO4 or ternary and NMP, PVDF, SP and secondary layer graphene, and proportioning is closed
Reason so that can effectively reduce energy consumption during larger current is discharged using the battery of this anode sizing agent, and extend battery
Life-span；The secondary layer graphene wherein added is the new material of 3-5 lamellars graphene and doped diamond, and the Buddha's warrior attendant added
Stone is Spherical Carbon so that is turned between the adjacent two layers of multilayer chip graphene, material conductivity is improved, so that new using this
The anode sizing agent and battery of material, in the case where not changing battery other structures, increase thermal conductivity, and during cell power generation
Caused heat is shed in time, battery is effectively reduced energy consumption during larger current is discharged, and extends battery life,
Improve security.
Above description of the invention is only the general introduction of technical solution of the present invention, in order to better understand the skill of the present invention
Art means, and being practiced according to the content of specification, with presently preferred embodiments of the present invention and coordinate accompanying drawing specifically below
It is bright as after.
Brief description of the drawings
Fig. 1 is the structural representation of the secondary layer graphene of the present invention；
Each several part mark is as follows in accompanying drawing：
Secondary layer graphene 100, multilayer chip graphene 101, carbon atom 102 and diamond 103.
Embodiment
Illustrate the embodiment of the present invention below by way of particular specific embodiment, those skilled in the art can be by this
Content disclosed in specification understands advantages of the present invention and effect easily.The present invention can also other different modes give
Implement, i.e. without departing substantially under the scope of disclosed, different modification and change can be given.
A kind of anode sizing agent containing secondary layer graphene, including major ingredient, solvent and additive, the major ingredient be LiFePO4 or
Ternary, the solvent are NMP (1-METHYLPYRROLIDONE), and the additive includes PVDF (Kynoar), SP (ultra-fine carbon
Powder) and time layer graphene；
The weight percentage of each component is as follows：The major ingredient is 56-59%, the NMP is 21-24%, the PVDF
For 2-3.5%, the SP be 15-17% and the secondary layer graphene is 0.7-1.2%；
As shown in figure 1, the secondary 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 and the diamond is 18-19:1；
The multilayer chip graphene is 3-5 lamellar graphenes, and every layer of thickness of the multilayer chip graphene is
0.2-0.5nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.2-0.4nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7-1.6nm.
Embodiment 1:The LiFePO4 is 56%, the NMP is 24%, the PVDF is 2.5%, the SP is
16.5% and the secondary layer graphene be 1.0%；
The weight ratio of the multilayer chip graphene and the diamond is 18.5:1；
The number of plies of the multilayer chip graphene is 5 layers, 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.
Embodiment 2：The LiFePO4 is 59%, the NMP is 21.6%, the PVDF is 3.5%, the SP is
15% and the secondary layer graphene be 0.9%；
The weight ratio of the multilayer chip graphene and the diamond is 18:1；
The number of plies of the multilayer chip graphene is 4 layers, and every layer of thickness of the multilayer chip graphene is 0.4nm；
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 0.7nm.
Embodiment 3：The LiFePO4 is 58.1%, the NMP is 21%, the PVDF is 3.2%, the SP is
17% and the secondary layer graphene be 0.7%；
The weight ratio of the multilayer chip graphene and the diamond is 18.7:1；
The number of plies of the multilayer chip graphene is 3 layers, and every layer of thickness of the multilayer chip graphene is 0.2nm；
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 1.6nm.
Embodiment 4：The ternary is 57.3%, the NMP is 23%, the PVDF is 3.0%, the SP is 15.5%
It is 1.2% with the secondary layer graphene；
The weight ratio of the multilayer chip graphene and the diamond is 18.3:1；
The number of plies of the multilayer chip graphene is 3 layers, and every layer of thickness of the multilayer chip graphene is 0.3nm；
The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.25nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 1.0nm.
Embodiment 5：The ternary is 58.5%, the NMP is 22%, the PVDF is 2.0%, the SP is 16.5%
It is 1.0% with the secondary layer graphene；
The weight ratio of the multilayer chip graphene and the diamond is 19:1；
The number of plies of the multilayer chip graphene is 5 layers, and every layer of thickness of the multilayer chip graphene is 0.35nm；
The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.35nm；
The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 1.2nm.
Embodiments of the invention 1 are carried out in accordance with the following steps to the preparation method of the secondary 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, and room temperature is cooled within 100ms rapidly, obtain multilayer chip graphene, multilayer chip stone described herein
The number of plies of black alkene is 3-12 layers；
Step 3: more than 100,000 grades under cleanliness factor environment, by separating 3-5 with molecular knife after electron microscope observation
Lamellar graphene；
Step 4: the 3-5 lamellars graphene that step 3 separates is mixed in proportion with diamond, in vacuum 100-
Under 200Pa, 600-800 DEG C of high temperature, 34-38h is stirred, is got product.
Preferably, in step 1, the thickness of the nickel metal layer is 300nm.
Embodiments of the invention 1 are carried out in accordance with the following steps to the preparation method of the anode sizing agent described in embodiment 5：
Step a, major ingredient, NMP and PVDF are added in agitator, are evacuated to -0.08~-0.09MPa, keep vacuum
In the case of stir 3.5-4.5h, it is cmpletely dissolved, produce mixture；
Step b, SP and secondary layer graphene are proportionally added into the mixture described in 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 the positive pole slurry
Material.
The anode sizing agent of the present invention includes LiFePO4 or ternary and NMP, PVDF, SP and secondary layer graphene, and proportioning is closed
Reason so that can effectively reduce energy consumption during larger current is discharged using the battery of this anode sizing agent, and extend battery
Life-span；The secondary layer graphene wherein added is the new material of 3-5 lamellars graphene and doped diamond, and the Buddha's warrior attendant added
Stone is Spherical Carbon so that is turned between the adjacent two layers of multilayer chip graphene, material conductivity is improved, so that new using this
The anode sizing agent and battery of material, in the case where not changing battery other structures, increase thermal conductivity, and during cell power generation
Caused heat is shed in time, battery is effectively reduced energy consumption during larger current is discharged, and extends battery life,
Improve security.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure that bright specification and accompanying drawing content are made, or other related technical areas are directly or indirectly used in, similarly
It is included within the scope of the present invention.
Claims (4)
- A kind of 1. anode sizing agent containing secondary layer graphene, it is characterised in that：Including major ingredient, solvent and additive, the major ingredient is LiFePO4 or ternary, the solvent are NMP, and the additive includes PVDF, SP and secondary layer graphene；The weight percentage of each component is as follows：The major ingredient is 56-59%, the NMP is 21-24%, the PVDF is 2- 3.5%th, the SP is 15-17% and the secondary layer graphene is 0.7-1.2%；The secondary 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 18-19:1；The multilayer chip graphene is 3-5 lamellar graphenes, and every layer of thickness of the multilayer chip graphene is 0.2- 0.5nm；The interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.2-0.4nm；The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7-1.6nm.
- 2. the anode sizing agent according to claim 1 containing secondary layer graphene, it is characterised in that：The weight ratio of the multilayer chip graphene and the diamond is 18.5:1；The number of plies of the multilayer chip graphene is 5 layers, and every layer of thickness of the multilayer chip graphene is 0.5nm；It is described The interlamellar spacing of the adjacent two layers of multilayer chip graphene is 0.3nm；The diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.9nm.
- 3. the anode sizing agent according to claim 1 containing secondary layer graphene, it is characterised in that：The system of the secondary layer graphene Preparation Method is carried out in accordance with 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, and room temperature is cooled within 100ms rapidly, obtain multilayer chip graphene, multilayer chip graphene described herein The number of plies be 3-12 layers；Step 3: more than 100,000 grades under cleanliness factor environment, by separating 3-5 synusia with molecular knife after electron microscope observation Shape graphene；Step 4: the 3-5 lamellars graphene that step 3 separates is mixed in proportion with diamond, vacuum 100-200Pa, Under 600-800 DEG C of high temperature, 34-38h is stirred, is got product.
- A kind of 4. preparation method of the anode sizing agent according to claim 1 containing secondary layer graphene, it is characterised in that：According to Following step is carried out：Step a, major ingredient, NMP and PVDF are added in agitator, are evacuated to -0.08~-0.09MPa, keep the feelings of vacuum 3.5-4.5h is stirred under condition, it is cmpletely dissolved, produces mixture；Step b, SP and secondary layer graphene are proportionally added into the mixture described in 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 the positive pole slurry Material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520961A (en) * | 2018-06-01 | 2018-09-11 | 江苏芯界新能源科技有限公司 | A kind of anode sizing agent and preparation method thereof containing secondary layer graphene |
| CN108682860A (en) * | 2018-06-01 | 2018-10-19 | 江苏芯界新能源科技有限公司 | A kind of lithium ion battery time layer graphene and preparation method thereof |
-
2017
- 2017-07-21 CN CN201710600467.3A patent/CN107546389A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108520961A (en) * | 2018-06-01 | 2018-09-11 | 江苏芯界新能源科技有限公司 | A kind of anode sizing agent and preparation method thereof containing secondary layer graphene |
| CN108682860A (en) * | 2018-06-01 | 2018-10-19 | 江苏芯界新能源科技有限公司 | A kind of lithium ion battery time layer graphene and preparation method thereof |
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Application publication date: 20180105 Assignee: Kunshan Jin Xin new energy Limited by Share Ltd Assignor: Kunshan state is the new energy power battery Co., Ltd. Contract record no.: 2018320010058 Denomination of invention: Positive paste containing secondary-layer graphene and preparation method of positive paste License type: Exclusive License Record date: 20181114 |
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