CN106532021A - Fe<3>C@onion-shaped carbon/amorphous carbon nanocomposite and preparation method and application thereof - Google Patents
Fe<3>C@onion-shaped carbon/amorphous carbon nanocomposite and preparation method and application thereof Download PDFInfo
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- H—ELECTRICITY
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- 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
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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
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- H01M4/624—Electric conductive fillers
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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- 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 Fe<3>C@onion-shaped carbon/amorphous carbon nanocomposite and a preparation method and an application thereof, and belongs to the technical field of nanomaterial preparation. The microstructure of the nanocomposite is formed by embedding a Fe<3>C@onion-shaped carbon core-shell structure nanometer capsule into an amorphous carbon nanosheet. A plasma arc discharge method is adopted, and iron powder and coal powder are pressed into blocks based on certain atomic percentage to be used as a positive electrode target material; graphite is adopted as a negative electrode material; argon and hydrogen are used as working gas; a negative electrode graphite electrode and the positive electrode target material iron-coal powder block are kept at certain distance; and arc discharge is performed between a positive electrode and a negative electrode to obtain the Fe<3>C@onion-shaped carbon/amorphous carbon nanocomposite. When the nanocomposite is used as the negative electrode material of a lithium ion battery, high cycling performance is represented, so that the nanocomposite is high in prospect as the negative electrode material of the lithium ion battery; and in addition, the preparation process is simple, the cost is low, and industrial production can be realized easily.
Description
Technical field
The invention belongs to technical field of material, and in particular to a kind of Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon is nano combined
Thing and its preparation method and application.
Background technology
As people are growing to the demand of the energy, the aggravation of fossil fuel reserves reductions and environmental pollution, open
The novel energy for sending out clean and effective becomes focus of concern.Lithium ion battery as a kind of energy storing device, with its ring
The features such as guarantor, light, high power capacity, long-life, is widely used in small portable device.Lithium ion battery plus-negative plate material is
Determine the central factor of its performance.Business-like negative material is mainly graphite material at present, and its theoretical specific capacity only has
372mAh/g, can not meet demand of the people to battery performance.Therefore, research and develop novel cathode material for lithium ion battery
It is significant.
Although carbide possesses the advantages such as nontoxic, rich reserves, inexpensive and excellent catalytic performance, but as which has
Less specific capacity in theory, carbide are not used as the negative material of lithium ion battery for a long time.2012, Su et al were first
Report nucleocapsid structure Fe@Fe3C/C nano-complexes have stable discharge capacity～500mAh/g, demonstrate its conduct
The potentiality of lithium ion battery negative material.Although, Fe and Fe3C is for Li+Intercalation is almost inactive, but author points out Fe3C makees
For catalyst, the formation/catabolic process of solid electrolyte interface (SEI) film can be promoted reversible, so as to improve carbon based negative electrodes
Chemical property.(L.Su,Z.Zhou,P.Shen.Core-shell Fe@Fe3C/C nanocomposites as anode
materials for Li ion batteries.Electrochimica Acta 87(2013)180-185).It is well known that
Carbide is hindered as lithium ion battery negative material, also following two obstacles：(1) volume during repetitive cycling is swollen
It is swollen/to shrink；(2) low electric conductivity of carbide.Currently for the research of two above problem, it is broadly divided into three kinds of approach and solves：
(1) nanorize of material；(2) Composite of active material；(3) nano composite material.Wherein the third approach under study for action should
With most extensively, wherein in the selection of base material, due to material with carbon element Stability Analysis of Structures, in charge and discharge process, change in volume is relatively
It is little, and electric conductivity and heat, chemical stability are good, with certain specific capacity, have therefore suffered from extensive concern.Normal conditions
Under, the carbon component in nano-complex has dual-use function：Promote electron transport and the work of carbide as conductive additive
Strengthen electrode structure stability for elastic cord breaker.
Lot of domestic and international scholar is devoted to the preparation method research of transition metal carbides/carbon composite, and brief introduction is such as
Under：
Chinese invention patent " carbon covered metal, the synthetic method of carbon covered metal carbide nanometer the micropowder " (patent No.:
CN99120144.2 AC arc discharge method) is adopted, is put by plasma in vaccum consumable electrode electric arc furnace using carbon and metal
Electricity evaporates simultaneously, and Jing chemical reactions generate carbon covered metal or metal carbides nano powder.
Chinese invention patent " comprising carbon composite of metal carbide particles being dispersed therein and preparation method thereof "
(the patent No.:200580012680.8) be related to carbon composite, the carbon composite comprising be dispersed in carbon, carbon fiber or carbon/
Metal carbide particles in carbon fiber substrate and free metal granule is not contained, wherein metal carbide particles are at least granule table
Face or whole granule are metal carbides, by source metal (i.e. selected from metallic particles, metal oxide particle or composition metal oxygen
At least one in compound granule) and carbon source (i.e. thermosetting resin) synthesize in the original location.
A kind of Chinese invention patent " charcoal Base Metal nitride, the preparation method of carbide electrochemical capacitance the material " (patent No.：
200710022253.9) raw material is obtained into hydrogel precursor by gel reaction, gained hydrogel is in nitriding gas or hydrogen
The lower Jing constant pressure and dries of gas effect and carbonization, are obtained charcoal base transition metal nitride, carbide electrochemical capacitance material.
A kind of Chinese invention patent " C/Fe3C lithium ion battery negative materials and preparation method thereof " (patent No.:
201010532415.5) to raw material using thermal polymerization in organic solvent, precursor is obtained, then under argon gas atmosphere protection,
Heat treatment is carried out, C/Fe is obtained3C complex, which is by amorphous carbon and Fe3C is constituted.
Chinese invention patent " preparation method of Bulbus Allii Cepae carbon carrying transition metal carbide nanometer the complex " (patent No.:
201010600970.7) raw material is loaded in proportion in closed reactor, by reacting by heating kettle, is aided in using initiator
Chemical vapour deposition technique single step reaction obtain the nano-complex of Bulbus Allii Cepae carbon carrying transition metal carbide.
A kind of Chinese invention patent " method for preparing metal carbides or carbon-clad metal the carbide " (patent No.：
201210562395.5) metal salt powder is formed into metallic oxide precursor thing in high-temperature roasting, is made with liquid carbon compound
Metal carbides or carbon-clad metal carbon are prepared for liquid carbon source and metallic oxide precursor thing carry out reduction and carburizing reagent
Compound.
Chinese invention patent " Macro film being made up of Nano capsule and nanotube and fiber absorbing material and its preparation side
The method " (patent No.:201310065805.X) using plasma arc discharge technology, it is prepared for by Fe@C, Fe3C@C nano glue
Capsule and CNT are interweaved the Macro film for connecting and composing.
Chinese invention patent " a kind of cobalt tungsten bimetallic carbide of carbon coating, the preparation method and applications " (patent No.：
201410723029.2) carbon is obtained by the mixture of one-step calcination cobalt, two kinds of metallic compounds of tungsten and nitrogen-rich organic thing
The cobalt tungsten bimetallic carbide of cladding.
A kind of Chinese invention patent " tubulose nucleocapsid structure graphitie@Fe3Composite of C and preparation method thereof and should
With " (the patent No.：201410827354.3) with graphite worm, ferrocene, 30% hydrogen peroxide as raw material, by simple liquid phase side
Method is simultaneously sintered under inert gas shielding, has prepared graphite@Fe3C nano complex.
Since it is desired that high temperature, using poisonous and expensive chemical precursor, advanced equipment and dull flow process, the above
Fe3C/C complex preparation methoies are generally difficult to industrialized.According to application demand, people generally wish obtain process is simple,
The Fe of low cost3C/C nano-complexes.However, Jing retrievals, Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano composite material and
Step prepares the method for this kind of nano composite material and has not been reported.
The content of the invention
It is an object of the invention to provide a kind of Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex and preparation method thereof, with
The nano-complex that phase obtains as the good preparation process simultaneously of cycle performance during lithium ion battery negative simply, low cost.
To achieve these goals, the present invention is achieved by the following technical programs.
The present invention prepares a kind of Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex, the nano-complex microstructure is
Fe3The embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule.Wherein, Fe3The grain of C@Bulbus Allii Cepae shape carbon Nano capsules
Footpath is 2～15nm, and kernel is Fe3C nano granule, shell are Bulbus Allii Cepae shape carbon.
Present invention also offers above-mentioned Fe3The preparation method of C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex, the material is
Using plasma arc discharge technology, under working gas, original position prepares；Wherein：
Graphite electrode is adopted for negative electrode, ferrum-coal powdered block is anode target material, negative electrode graphite electrode and anode target material ferrum-
The distance of 2～30mm is kept between coal powdered block；The voltage of arc discharge is 10～40V；Working gas is argon and hydrogen
Gas.
The anode target material is ferrum-coal powdered block, and iron powder and coal dust are pressed into block under pressure 1MPa～1GPa
As the anode target material material of plasma arc furnace, the mass percent in the anode target material material shared by ferrum is 30～
50%.
The partial pressure of the argon working gas is 0.01～0.5MPa, and the partial pressure of hydrogen gas is 0.01～0.3MPa.
Present invention also offers Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is used as lithium ion battery negative material
Application.
The method of the application is：(1) according to mass ratio 7:2:1 ratio weighs Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon is received
Rice complex, acetylene black, segregation fluorothene, grind in being put into crucible, are subsequently adding N-Methyl pyrrolidone and continue grinding, make
Mixture in the pasty state, is then uniformly applied to which on Copper Foil, in 100 DEG C or so dry 12～20h, carries out this Copper Foil afterwards
Roll, be cut into the certain disk of diameter, make electrode slice；(2) in the glove box full of argon, in conventional manner by electrode
Piece, barrier film, lithium piece and nickel foam are assembled into button battery.
Constant current charge-discharge loop test is carried out at room temperature with test method, the circulation of button battery made by measure
Stability.
Hinge structure, the present invention's have the prominent advantages that：
1) present invention has prepared Fe first3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex.
2) preparation process condition of the present invention is simple, and low cost, it is easy to control disposably generates product, is Fe3C@Bulbus Allii Cepae shapes
The practical application of carbon/amorphous carbon nano-complex provides condition.
3) Fe prepared by the present invention3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is with Fe3C@Bulbus Allii Cepae shape carbon nucleocapsid is tied
In the embedded amorphous carbon nanometer sheet of structure Nano capsule, the structure is conducive to the diffusion of lithium ion, buffer volumes change and electrical conductivity
Raising, and Fe3C nano particle has the effect of catalytic modification SEI films so that the partial reduction products of SEI films are reversible, because
This is conducive to the chemical property of nano composite material, is particularly conducive to its cyclical stability.
Description of the drawings
Fig. 1 is preparation Fe of the present invention3The schematic device of C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex；
Label in figure：1st, upper lid；2nd, negative electrode；3rd, valve；4th, anode target material；5th, observation window；6th, baffle plate；7th, copper anode；8th, press from both sides
Head；9th, graphite crucible；10th, DC pulse power supply；A, cooling water；B, argon；C, hydrogen.
Fig. 2 is Fe prepared by the embodiment of the present invention 13The X-ray diffraction of C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex
(XRD) collection of illustrative plates；
According to JCPDS PDF cards, nano-complex principal phase can be retrieved for Fe3C crystalline phases are constituted；At 2 20 ° of θ ≈
Characteristic peak of the broad peak for amorphous carbon, as Bulbus Allii Cepae shape carbon is in shell, so XRD cannot detect Bulbus Allii Cepae shape carbon phase.
Fig. 3 is Fe prepared by the embodiment of the present invention 13The transmitted electron of C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex shows
Micro mirror (TEM) image；
As can be seen from the figure Fe3C@Bulbus Allii Cepae shape carbon Nano capsules are distributed in amorphous carbon nanometer sheet, its Nano capsule
Particle diameter be 2～15nm.
Fig. 4 is the Fe prepared by the embodiment of the present invention 13The high-resolution of C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is saturating
Penetrate electron microscope image；
As can be seen from the figure Fe obtained by3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is Fe3C@Bulbus Allii Cepae shape carbon nanometers
In the embedded amorphous carbon nanometer sheet of capsule, wherein, Fe3C@Bulbus Allii Cepae shape carbon Nano capsules kernel is Fe3C nano granule, shell are ocean
Herba Alii fistulosi shape carbon.
Fig. 5 is the Fe prepared by the embodiment of the present invention 13C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is used as negative pole material
The circulation discharge curve of material；
It can be seen that carrying out charge and discharge cycles test with the electric current of 100mA/g, circulating the discharge capacity after 100 times is
1200.6mAh/g。
Fig. 6 is the Fe prepared by the embodiment of the present invention 23C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is used as negative pole material
The circulation discharge curve of material；
It can be seen that carrying out charge and discharge cycles test with the electric current of 100mA/g, circulating the discharge capacity after 100 times is
1210.2mAh/g。
Specific embodiment
With reference to embodiment, the invention will be further described, but the present invention is not limited to following embodiments.
Embodiment 1
Lid 1 on device shown in Fig. 1 is opened, is made negative electrode 2 with graphite and is fixed on chuck 8, institute consumable anode target 4
Composition is straight iron powder and coal dust (mass ratio 50:50) block being pressed into, is placed on the copper anode 7 of logical cooling water, in logical cooling water
Copper anode and target between be graphite crucible 9.Keep between negative electrode graphite electrode and 4 anode target materials ferrum-coal powdered block
The distance of 30mm.Lid 1 on lid mounted device, leads to cooling water a, after valve 3 is whole operating room's evacuation, is passed through argon b and hydrogen
Gas c, the partial pressure of argon is 0.5MPa, and the partial pressure of hydrogen is 0.3MPa, connects DC pulse power supply 10, and voltage is 40V.Arc light is put
In electric process, adjustment work electric current is kept relative stability with voltage.Prepared Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex,
The nano-complex microstructure is Fe3In the embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule, wherein
Fe3The particle diameter of C@Bulbus Allii Cepae shape carbon Nano capsules is 2～15nm, and kernel is Fe3C nano granule, shell be Bulbus Allii Cepae shape carbon, such as Fig. 3,
Shown in Fig. 4.
According to mass ratio 7:2:1 ratio weighs Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex, acetylene black, segregation
Fluorothene, grinds in being put into crucible, is subsequently adding N-Methyl pyrrolidone and continues grinding, make mixture in the pasty state, then will
Which is uniformly applied on Copper Foil, is dried 12h at 100 DEG C or so, rolls this Copper Foil afterwards, is cut into the certain circle of diameter
Piece, makes electrode slice；In the glove box full of argon, in conventional manner electrode slice, barrier film, lithium piece and nickel foam are assembled into
Button battery.At room temperature, constant current charge-discharge loop test is carried out with 100mA/g, after 100 circulations, its capacitance
For 1200.6mAh/g, such as Fig. 5. this explanation Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is used as lithium ion battery negative
Material has good cycle performance.
Embodiment 2
Lid 1 on device shown in Fig. 1 is opened, is made negative electrode 2 with graphite and is fixed on chuck 8, institute consumable anode target 4
Composition is straight iron powder and coal dust (mass ratio 30:70) block being pressed into, is placed on the copper anode 7 of logical cooling water, in logical cooling water
Copper anode and target between be graphite crucible 9.Keep between negative electrode graphite electrode and 4 anode target materials ferrum-coal powdered block
The distance of 20mm.Lid 1 on lid mounted device, leads to cooling water a, after valve 3 is whole operating room's evacuation, is passed through argon b and hydrogen
Gas c, the partial pressure of argon is 0.5MPa, and the partial pressure of hydrogen is 0.3MPa, connects DC pulse power supply 10, and voltage is 10V.Arc light is put
In electric process, adjustment work electric current is kept relative stability with voltage.Prepared Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex,
The nano-complex microstructure is Fe3In the embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule.Wherein
Fe3The particle diameter of C@Bulbus Allii Cepae shape carbon Nano capsules is 2～15nm, and kernel is Fe3C nano granule, shell are Bulbus Allii Cepae shape carbon.
According to mass ratio 7:2:1 ratio weighs Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex, acetylene black, segregation
Fluorothene, grinds in being put into crucible, is subsequently adding N-Methyl pyrrolidone and continues grinding, make mixture in the pasty state, then will
Which is uniformly applied on Copper Foil, is dried 20h at 100 DEG C or so, rolls this Copper Foil afterwards, is cut into the certain circle of diameter
Piece, makes electrode slice；In the glove box full of argon, in conventional manner electrode slice, barrier film, lithium piece and nickel foam are assembled into
Button battery.At room temperature, constant current charge-discharge loop test is carried out with 100mA/g, after 100 circulations, its capacitance
For 1210.2mAh/g, such as Fig. 6. this explanation Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is used as lithium ion battery negative
Material has good cycle performance.
Embodiment 3
Lid 1 on device shown in Fig. 1 is opened, is made negative electrode 2 with graphite and is fixed on chuck 8, institute consumable anode target 4
Composition is straight iron powder and coal dust (mass ratio 50:50) block being pressed into, is placed on the copper anode 7 of logical cooling water, in logical cooling water
Copper anode and target between be graphite crucible 9.Keep between negative electrode graphite electrode and 4 anode target materials ferrum-coal powdered block
The distance of 30mm.Lid 1 on lid mounted device, leads to cooling water a, after valve 3 is whole operating room's evacuation, is passed through argon b and hydrogen
Gas c, the partial pressure of argon is 0.5MPa, and the partial pressure of hydrogen is 0.3MPa, connects DC pulse power supply 10, and voltage is 20V.Arc light is put
In electric process, adjustment work electric current is kept relative stability with voltage.Prepared Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex,
The nano-complex microstructure is Fe3In the embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule.Wherein
Fe3The particle diameter of C@Bulbus Allii Cepae shape carbon Nano capsules is 2～15nm, and kernel is Fe3C nano granule, shell are Bulbus Allii Cepae shape carbon.
Embodiment 4
Lid 1 on device shown in Fig. 1 is opened, is made negative electrode 2 with graphite and is fixed on chuck 8, institute consumable anode target 4
Composition is straight iron powder and coal dust (mass ratio 40:60) block being pressed into, is placed on the copper anode 7 of logical cooling water, in logical cooling water
Copper anode and target between be graphite crucible 9.Keep between negative electrode graphite electrode and 4 anode target materials ferrum-coal powdered block
The distance of 20mm.Lid 1 on lid mounted device, leads to cooling water a, after valve 3 is whole operating room's evacuation, is passed through argon b and hydrogen
Gas c, the partial pressure of argon is 0.2MPa, and the partial pressure of hydrogen is 0.2MPa, connects DC pulse power supply 10, and voltage is 30V.Arc light is put
In electric process, adjustment work electric current is kept relative stability with voltage.Prepared Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex,
The nano-complex microstructure is Fe3In the embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule.Wherein
Fe3The particle diameter of C@Bulbus Allii Cepae shape carbon Nano capsules is 2～15nm, and kernel is Fe3C nano granule, shell are Bulbus Allii Cepae shape carbon.
Embodiment 5
Lid 1 on device shown in Fig. 1 is opened, is made negative electrode 2 with graphite and is fixed on chuck 8, institute consumable anode target 4
Composition is straight iron powder and coal dust (mass ratio 45:55) block being pressed into, is placed on the copper anode 7 of logical cooling water, in logical cooling water
Copper anode and target between be graphite crucible 9.Keep between negative electrode graphite electrode and 4 anode target materials ferrum-coal powdered block
The distance of 10mm.Lid 1 on lid mounted device, leads to cooling water a, after valve 3 is whole operating room's evacuation, is passed through argon b and hydrogen
Gas c, the partial pressure of argon is 0.01MPa, and the partial pressure of hydrogen is 0.01MPa, connects DC pulse power supply 10, and voltage is 40V.Arc light
In discharge process, adjustment work electric current is kept relative stability with voltage.Prepared Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon is nano combined
Thing, the nano-complex microstructure are Fe3In the embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule.Its
Middle Fe3The particle diameter of C@Bulbus Allii Cepae shape carbon Nano capsules is 2～15nm, and kernel is Fe3C nano granule, shell are Bulbus Allii Cepae shape carbon.
Claims (3)
1. a kind of Fe3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex, it is characterised in that the nano-complex microstructure is
Fe3The embedded amorphous carbon nanometer sheet of C@Bulbus Allii Cepae shape carbon nuclear shell structure nanos capsule；Wherein：Fe3The grain of C@Bulbus Allii Cepae shape carbon Nano capsules
Footpath is 2～15nm, and kernel is Fe3C nano granule, shell are Bulbus Allii Cepae shape carbon.
2. Fe as claimed in claim 13The preparation method of C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex, it is characterised in that：Should
Material is that, using plasma arc discharge technology, under working gas, original position prepares；Wherein：
Graphite electrode is adopted for negative electrode, ferrum-coal powdered block is anode target material, negative electrode graphite electrode and anode target material ferrum-coal dust
The distance of 2～30mm is kept between last block；The voltage of arc discharge is 10～40V；Working gas is argon and hydrogen gas；
Mass percent in the anode material shared by ferrum is 30～50%；The partial pressure of the argon be 0.01～0.5MPa, hydrogen
The partial pressure of gas is 0.01～0.3MPa.
3. the Fe that such as claim 2 preparation method is obtained3C@Bulbus Allii Cepaes shape carbon/amorphous carbon nano-complex is used as lithium ion battery
The application of negative material.
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| CN107511478A (en) * | 2017-06-22 | 2017-12-26 | 中国科学院金属研究所 | Graphite parcel Haas strangles the alloy cpd Fe of (Heusler) and N doping3Si Nano capsules |
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