CN107689463A - Lithium battery multi-layer graphene and preparation method thereof - Google Patents
Lithium battery multi-layer graphene and preparation method thereof Download PDFInfo
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- CN107689463A CN107689463A CN201710600553.4A CN201710600553A CN107689463A CN 107689463 A CN107689463 A CN 107689463A CN 201710600553 A CN201710600553 A CN 201710600553A CN 107689463 A CN107689463 A CN 107689463A
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- graphene
- multilayer chip
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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
- H01M10/42—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
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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
- 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 lithium battery multi-layer graphene and preparation method thereof, multi-layer graphene includes multilayer chip graphene and diamond, 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 (4 6)：1；Multilayer chip graphene is 68 lamellar graphenes, and every layer of thickness of multilayer chip graphene is 0.3 0.7nm, and the interlamellar spacing of the adjacent two layers of multilayer chip graphene is 0.1 0.5nm；Diamond is Spherical Carbon, and the particle diameter of Spherical Carbon is 0.7 1.6nm.Additive in invention can be put into electrolyte or positive electrode by adjusting different proportion, to reach the purpose of the operating temperature range of broadening lithium ion battery, allow lithium battery in the environment of less than 20 DEG C or higher than 60 DEG C, still can be with normal work, it is safe and service life is grown.
Description
Technical field
The present invention relates to technical field of lithium batteries, more particularly, to a kind of lithium battery multi-layer graphene and its preparation side
Method.
Background technology
Lithium battery refers to the electricity for containing lithium (including lithium metal, lithium alloy and lithium ion, lighium polymer) in electrochemical system
Pond.Lithium battery is broadly divided into two classes：Lithium metal battery and lithium ion battery.Lithium metal battery is typically non-rechargeabel, and
Include the lithium of metallic state.Lithium ion battery does not contain the lithium of metallic state, and can charge.Lithium ion battery：Lithium ion
Battery is usually positive electrode using lithium alloy metals oxide, graphite is negative material, the battery using nonaqueous electrolyte.
And lithium ion battery as main electrokinetic cell due to the ability to charge repeatedly, being developed.
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,
The rise of lithium battery interior temperature, lithium battery internal resistance is raised, so as to cause the decline of battery capacity, and then shortens lithium battery
Service life, temperature is too high or even can explode；The freezing point of lithium ion battery electrolyte solution is easily freezed at -40 DEG C,
Temperature environment below freezing is there is a possibility that lithium battery burns in the moment that electronic product is opened.Therefore, those skilled in the art actively visit
Rope, to develop a kind of new additive material, it can be used for improving electrolyte material or positive electrode, reach broadening lithium
The purpose of the operating temperature range of ion battery, lithium battery is set still may be used in the environment of less than -20 DEG C or higher than 60 DEG C
With normal work, and service life is grown, safe.
The content of the invention
, can be with the present invention solves the technical problem of providing a kind of lithium battery multi-layer graphene and preparation method thereof
For improving electrolyte material or positive electrode, to reach the purpose of the operating temperature range of broadening lithium ion battery, make lithium electric
Pond can be in the environment of less than -20 DEG C or higher than 60 DEG C, still can be with normal work, and service life is grown, safe.
In order to solve the above technical problems, one aspect of the present invention is：A kind of lithium battery multilayer stone is provided
Black alkene and preparation method thereof, the multi-layer graphene include multilayer chip graphene and diamond, and the diamond is located at multilayer
Between adjacent two layers of flake graphite alkene, 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
0.3-0.7nm, 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；
Further say, the diamond is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.9nm.
Present invention also offers a kind of preparation method of lithium battery 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.
The beneficial effects of the invention are as follows：
The present invention includes multilayer chip graphene and diamond, and because common graphite alkene is sheet carbon structure, the structure exists
There are good heat conduction and conductive effect in lamella, but due to the presence of dirac point (electroneutral point) between lamella so that phase
State of isolation is nearly between mutual lamella；In order to solve this phenomenon, the present invention is doped and added to diamond, and the Buddha's warrior attendant added
Stone is Spherical Carbon so that is turned between the adjacent two layers of multi-layer graphene, improves material conductivity, the layer of multilayer chip graphene
Number is 6-8 layers, and the reaction ratio of multilayer chip graphene and diamond is 5：1, the present invention in additive can by adjust not
It is put into proportion in electrolyte or positive electrode, so as to reach the purpose of the operating temperature range of broadening lithium ion battery, makes lithium
Battery can be in the environment of less than -20 DEG C or higher than 60 DEG C, still can be with normal work, and extend the use longevity of lithium battery
Life, decreases or even eliminates hidden peril of explosion, safe.
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 present invention；
Each several part mark is as follows in accompanying drawing：
Multi-layer graphene 100, flake graphite alkene 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 lithium battery multi-layer graphene 100, as shown in figure 1, the multi-layer graphene 100 includes multilayer chip graphite
Alkene 101 and diamond 103, the diamond are located between adjacent two layers of multilayer chip graphene, the diamond and institute
The carbon atom 102 for the multilayer chip graphene stated corresponds；
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 thickness of the multilayer chip graphene
For 0.3-0.7nm, the interlamellar spacing of the adjacent two layers of the multilayer chip graphene is 0.1-0.5nm；
The diamond 103 is Spherical Carbon, and the particle diameter of the Spherical Carbon is 0.7-1.6nm.
Embodiment 1：As shown in figure 1, 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 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 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 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 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 walk to the preparation method of the lithium battery multi-layer graphene described in embodiment 5 according to following
It is rapid to carry out：
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.
The present invention includes multilayer chip graphene and diamond, and because common graphite alkene is sheet carbon structure, the structure exists
There are good heat conduction and conductive effect in lamella, but due to the presence of dirac point (electroneutral point) between lamella so that phase
State of isolation is nearly between mutual lamella；In order to solve this phenomenon, the present invention is doped and added to diamond, and the Buddha's warrior attendant added
Stone is Spherical Carbon so that is turned between the adjacent two layers of multi-layer graphene, improves material conductivity, the layer of multilayer chip graphene
Number is 6-8 layers, and the reaction ratio of multilayer chip graphene and diamond is 5：1, the present invention in additive can by adjust not
It is put into proportion in electrolyte or positive electrode, so as to reach the purpose of the operating temperature range of broadening lithium ion battery, makes lithium
Battery can be in the environment of less than -20 DEG C or higher than 60 DEG C, still can be with normal work, and extend the use longevity of lithium battery
Life, decreases or even eliminates hidden peril of explosion, safe.
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 (3)
- A kind of 1. lithium battery multi-layer graphene, it is characterised in that：The multi-layer graphene includes multilayer chip graphene and gold Hard rock, the diamond are located between adjacent two layers of multilayer chip graphene, the diamond and described multilayer chip The carbon atom of 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- 0.7nm, 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. lithium ion battery multi-layer graphene according to claim 1, it is characterised in that：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, 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.
- A kind of 3. preparation method of lithium battery multi-layer graphene according to claim 1, it is characterised in that：Including as follows Step：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.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108808000A (en) * | 2018-06-01 | 2018-11-13 | 江苏芯界新能源科技有限公司 | A kind of lithium battery multi-layer graphene and preparation method thereof |
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| CN102849961A (en) * | 2011-07-01 | 2013-01-02 | 中央研究院 | Method for growing carbon film or inorganic material film on substrate |
| CN104150860A (en) * | 2014-07-22 | 2014-11-19 | 燕山大学 | Diamond-enhanced graphene sheet with high thermal conductivity and preparation method thereof |
| CN105977458A (en) * | 2016-05-09 | 2016-09-28 | 吉林大学 | Nano diamond powder and graphene composite electrode material and preparation method thereof |
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| CN101817516A (en) * | 2010-05-21 | 2010-09-01 | 哈尔滨工业大学 | Method for preparing graphene or graphene oxide by using high-efficiency and low-cost mechanical stripping |
| CN102849961A (en) * | 2011-07-01 | 2013-01-02 | 中央研究院 | Method for growing carbon film or inorganic material film on substrate |
| CN102502593A (en) * | 2011-10-11 | 2012-06-20 | 中国石油大学(北京) | Preparation method of grapheme or doped graphene or graphene complex |
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Application publication date: 20180213 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: Multi-layer graphene for lithium battery and preparation method of multi-layer graphene License type: Exclusive License Record date: 20181114 |
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Application publication date: 20180213 |