CN108155353A - A kind of graphitized carbon jacketed electrode material and preparation method thereof and the application as energy storage device electrode material - Google Patents
A kind of graphitized carbon jacketed electrode material and preparation method thereof and the application as energy storage device electrode material Download PDFInfo
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Abstract
Application the invention discloses a kind of graphitized carbon jacketed electrode material and preparation method thereof and as energy storage device electrode material；The material is made of graphitized carbon jacketed electrode material; preparation method is that organic matter and electrode material or electrode material precursor mixture material are placed under protective atmosphere; in 800~2000 DEG C of temperature lower calcinations; up to graphitized carbon jacketed electrode material; the material has graphitized carbon clad; electrode material electric conductivity can be increased, the electronic transmission process of material thermal energy storage process is improved, so as to improve the high rate capability of electrode material and long circulating performance.This method operability is strong, and simple process and low cost is honest and clean, and yield is high, has universality, can efficiently improve the energy-storage property of electrode material, suitable for commercially producing.
Description
Technical field
The present invention relates to a kind of modified electrode material, more particularly to a kind of graphitized carbon jacketed electrode material and its preparation side
Method and the application as energy storage device electrode material, belong to technical field of energy storage.
Background technology
Carbon material, especially graphitized carbon have the layer structure similar to graphene, while have excellent conductance
Rate is considered to be the ideal material for the electron-transport rate for improving other electrode materials.
In order to improve the electric conductivity of electrode material, traditional method be directly add acetylene black in the reaction system, carbon is received
Mitron either the carbon components such as graphene so as to obtain combination electrode material but these materials can not realize uniform cladding or
In carbon material surface homoepitaxial, all exist and disperse uneven and agglomeration；In addition, the composite wood that this ex situ is formed
The interface for expecting carbon matrix and electrode material is not closely to connect, and after the charge and discharge iterative cycles of electrode material, interface is very
Division is easily separated from so as to influence the long circulating performance and high rate performance of battery material.Secondly, although amorphous carbon can be with electricity
Pole material in situ is synthetically formed uniform carbon-coated electrode material, but the electric conductivity that amorphous carbon provides can not be with graphitized carbon
Electric conductivity contend with.Therefore, the preparation of graphitized carbon in recent years and the fabricated in situ of electrode material cause many concerns.Than
Such as, the first academician in Zhao east reports obtains graphitized carbon cladding two by glucose and titanium dioxide electrodes presoma by Pintsch process
Titanium oxide (TiO2) hollow ball, the composite material exhibits go out excellent storage lithium performance [J.Am.Chem.Soc.2015,137,
13161-13166]；Meanwhile U.S. Argonne laboratory also reports that acting on acquisition graphitized carbon by Ni-MOF Pintsch process uniformly wraps
Nickel oxide (NiO) composite material covered has high magnification storage sodium cycle performance [ACS nano, 2015,10 (1) of overlength:377-
386].In addition, it is easy to prepare nitrogen, sulfur doping or be total to from hetero atom fragrant type organic matter and its derivative Pintsch process
The graphitized carbon of doping, the electron-transport rate that can not only improve electrode material improve the energy-storage property of bulk material, and itself
It can also be as excellent energy storage material.
Invention content
It coats for existing carbon material coating modification electrode material uneven, easily reunites, carbon material and electrode material
The problems such as interface connection is not close, is easily separated from division, and carbon material degree of graphitization is low, and electric conductivity is poor.
First purpose of the present invention is to be to provide a kind of highly-graphitized carbon in-stiu coating, has dispersibility and stability
Well, the modified electrode material for the advantages that electro-chemical activity is high.
Second object of the present invention is to be to provide that a kind of step is simple, operation controllability is strong, at low cost prepares stone
The method of inkization carbon coating electrode material, this method are conducive to industrialized production.
Third object of the present invention is the application for being to provide the graphitized carbon jacketed electrode material, will be used as electrode
Material is applied to energy storage device, can improve the capacity of energy storage device, high rate performance, prolong the service life.
In order to realize above-mentioned technical purpose, the present invention provides a kind of preparation method of graphitized carbon jacketed electrode material,
This method is that the mixed material of organic matter and electrode material or electrode material presoma is placed under protective atmosphere, 800~
2000 DEG C of temperature lower calcinations to get；At least one of iron, titanium, copper, cobalt, nickel metallic element is included at least in the mixed material.
Preferred scheme, the organic matter include C6~C16Alkane, C5~C11Alcohol compound, C7~C15Fragrance
Class compound, heteroaromatic class compound, saccharide compound, cellulose, polyacrylonitrile, povidone, polyvinyl chloride, poly- second two
At least one of alcohol, Kynoar, polyacrylic acid.Saccharide compound such as sucrose, starch, glucose etc..
More preferably scheme, the organic matter is by C6~C16Alkane and C5~C11Alcohol compound by volume be 1:
10~10:1 composition, C6~C16Alkane include n-hexane, normal heptane, normal octane, n -nonane, n-decane, n-undecane, positive ten
Dioxane, n-tridecane, n-tetradecane, n-pentadecane, hexadecane and above-mentioned alkane isomer.C5~C11Alcohols
Compound includes n-amyl alcohol, n-hexyl alcohol, n-heptanol, n-octyl alcohol, n-nonyl alcohol, Decanol, positive undecyl alcohol, n-dodecanol, positive 13
Alcohol, tetradecanol, pentadecanol and above-mentioned alcohols isomer.Further preferred scheme, the organic matter is by just
Hexane and n-amyl alcohol by volume 1~10:1 composition.Best ratio presses 6 for n-hexane and n-amyl alcohol:1 composition.Preferably have
Machine object is mainly liquid state organics, can well be mixed, and alkane and alcohol compound are applied in combination with electrode material, main
The advantages of wanting shows：On the one hand, the two combination being carbonized and is graphitized, the yield of carbonization and graphitized products is high, and
The degree of graphitization for coating carbon material is high, it is easier to obtain high purity graphite carbon, be conducive to improve the electric conductivity of covering material,
The performances such as capacity, on the other hand, the alcohols and alkanes of selection have better surface wettability to electrode material, more have
Conducive to the dispersion of electrode material and the generation of in-stiu coating graphitized carbon, be conducive to improve the stability of composite material.
Preferred scheme, the electrode material include existing known positive electrode or negative material.Preferred anode electricity
Pole material positive electrode material includes market-oriented LiFePO4, cobalt acid lithium, LiMn2O4, lithium nickelate, nickel cobalt manganese lithium etc. three
First material and rich lithium/sodium lamellar compound, general molecular formula AxMO2(A=Li, Na；M=Fe, Cr, V etc.) lithium/sodium base mistake
It is XO to cross metal oxide and general molecular formulam n-(such as X=P, S), general molecular formula AxM2(PO4)3(A=Li, Na；M=V,
Fe, Ti) the polyanionic compound of NASICON types etc..Preferred negative electrode material includes the graphite containing industrialization and bears
All types of carbon-based materials including the material of pole, all metal oxides and metal sulfide negative material, from master
The 4th main group of race and with the negative materials such as the Si bases of the 5th main group, Ge bases, Sn bases, Pb bases, P bases, As bases, Sb bases, Bi bases and
Spinel type lithium titanate and Na4Ti5O12, NaTiO2And Na2TinO2n+1(2<n<9) sodium titanate, the titanium dioxide of different moleculars formula such as
The titanium base materials such as titanium, titanium oxide, potassium titanate, metatitanic acid, titanium sulfate, titanium carbide and NASICON-Na2Ti2(PO4)3Wait phosphoric acid titanium-based
Negative material.
Preferred scheme, the electrode material presoma are to generate positive electrode by reaction or generate the original of negative material
Material.The known positive electrode of foregoing description or the raw material of negative material belong to the range of choice of electrode material presoma.Such as packet
Include the simple substance raw material of each element in various positive electrodes or negative electrode material；Either various elements salt, as haloid,
All kinds of inorganic salts such as carbonate, nitrate, sulfate, phosphate, silicate；Can also be the organic salt of various elements, such as
Tetrabutyl titanate and isopropyl titanate etc..
Preferred scheme, the calcination time are 0.5~10h.Preferably 1~5h.
The present invention also provides a kind of graphitized carbon jacketed electrode materials, are prepared by the above method.
Preferred scheme, in the graphitized carbon jacketed electrode material mass percentage content of electrode material for 5~
98%.
The present invention also provides a kind of application of graphitized carbon jacketed electrode material, as electrochemical energy storing device
Electrode material application.
The electrochemical energy accumulator of the present invention includes ultracapacitor, lithium ion battery, solar cell, fuel cell, lithium
Air cell, lithium-sulfur cell, lithium sky battery, sodium-ion battery, sodium-sulphur battery, sodium sky battery, aluminium ion battery or magnesium ion electricity
Pond etc..
Carbon material can be graphitized carbon according to the raw material difference selected in the graphitized carbon jacketed electrode material of the present invention
Or Heteroatom doping graphitized carbon.
Organic matter and electrode material or electrode material precursor mixture material can be solid in technical scheme of the present invention
Shape, liquid or paste, depending on the raw material of selection.
The metallic elements such as iron content, titanium, copper, cobalt or nickel are needed in technical scheme of the present invention in mixed material, these metals member
Element has the function of to be catalyzed carbon material graphitization conversion, therefore the metals such as the iron of proper content, titanium, copper, cobalt or nickel have wherein
Conducive to the generation of graphitized carbon, the degree of graphitization of clad graphitized carbon can be improved.These metals can pass through electrode material
Material introduces or by addition adding the metal simple-substances such as a small amount of iron, titanium, copper, cobalt or nickel or salt or oxide etc., is conducive to stone
The generation of inkization carbon.Its additive amount is general catalytic amount.
Protective atmosphere is at least one of argon gas, nitrogen or hydrogen in technical scheme of the present invention.
Calcination temperature need to be higher than 800 DEG C or more in technical scheme of the present invention, what calcination temperature was mainly obtained less than 800 DEG C
Amorphous carbon.And calcination temperature mainly obtains graphitized carbon for 800~2000 DEG C.
In technical scheme of the present invention the thickness of the clad graphitized carbon of electrode material regard organic matter amount and type and
It is fixed.
Compared with the prior art, the advantageous effects that technical scheme of the present invention is brought：
1st, graphitized carbon jacketed electrode material of the invention, graphitized carbon degree of graphitization is high, is evenly coated, stability
Good, graphitization carbon-coating one side carbon improves the conductivity of electrode material, greatly improves thermal energy storage process electron-transport rate, accelerates
Electron dynamics processes, on the other hand, its own can also contribute certain energy-storage property, it is achieved thereby that high power capacity, high power
The further development of rate, long-life electrochemical energy storing device.
2nd, graphitized carbon jacketed electrode material of the invention is obtained in situ by one step of high-temperature calcination, organic matter Pintsch process
Graphitized carbon is formed, electrode material surface is coated on, good dispersion can be obtained, coat stable composite material.This packet carbon
On the one hand method can greatly improve the electron dynamics process of electrode material, charge and discharge process on the other hand can be inhibited electric
Direct side reaction between the volume expansion of pole material and electrode material and electrolyte, so as to significantly increase electrode material
Electrochemical energy storage performance has extensive reference value；
3rd, the preparation method raw material sources of graphitized carbon jacketed electrode material of the invention are extensive, and at low cost, process is simple,
Without filter centrifugation dialysis etc. incessantly, controllable row is operated by force, conveniently；
4th, graphitized carbon jacketed electrode material of the invention is applied to electrochemical energy storing device field, is demonstrated by more excellent
High power capacity, high power, long-life energy storage index.
Description of the drawings
【Fig. 1】It is the organic matter and the photo in kind before TiO 2 precursor calcination obtained in embodiment 1；
【Fig. 2】It is the compound scanning electron microscope of the carbon-coated titanium dioxide electrodes material of graphitization obtained in embodiment 1
Figure；
【Fig. 3】It is the compound transmission electron microscope of the carbon-coated titanium dioxide electrodes material of graphitization obtained in embodiment 1
Figure；
【Fig. 4】It is the compound high power transmission of the carbon-coated titanium dioxide electrodes material of graphitization obtained in embodiment 1
Electron microscope；
【Fig. 5】It is the compound storage sodium cycle of the carbon-coated titanium dioxide electrodes material of graphitization obtained in embodiment 1
Performance map.
【Fig. 6】It is the compound transmission of the amorphous carbon-coated titanium dioxide electrodes material obtained in comparative example 1
Electron microscope.
【Fig. 7】It is the Raman spectrogram that carbon component is coated in the composite material obtained in embodiment 1 with comparative example 1.
【Fig. 8】It is the compound transmission electron microscope of the carbon-coated titanium dioxide electrodes material of graphitization obtained in embodiment 3
Figure.
Specific embodiment
Following embodiment is in order to which the present invention is explained in greater detail, these embodiments do not form any restrictions to the present invention,
The present invention can be implemented as the either type described in invention content.
Embodiment 1
First by 1.0ml titanium chloride solutions (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyl trimethyl
Ammonium bromide (CTAB；It 0.58g) dissolves and to be dispersed in n-hexane (60ml) organic molten with mixing that n-amyl alcohol (10ml) is formed
It in agent, is then transferred in 100ml reaction kettles, solvent heat 6h is directly dried in vacuo and obtains organic matter and dioxy in 200 DEG C of baking ovens
Change the mixture of titanium precursors.Then in inert protective gas environment, 800 DEG C of calcining 2h, heating rate is 10 DEG C/min, from
So cooling.Obtained black powder is the compound for being graphitized carbon-coated titanium dioxide electrodes material.Fig. 1 is obtains after solvent heat
The organic matter arrived and TiO 2 precursor material object photo, it is white paste to show obtained substance.Fig. 2 is the stone prepared
The scanning electron microscope (SEM) photograph of the compound of the carbon-coated titanium dioxide electrodes material of inkization, it is finely dispersed small to show the product obtained
Graininess.Fig. 3 is the transmission electron microscope photo of the compound of the carbon-coated titanium dioxide electrodes material of graphitization prepared, is rendered as
Titanium dioxide granule surface is wrapped by layer of material.Fig. 4 is the compound for being graphitized carbon-coated titanium dioxide electrodes material
High power transmission electron microscope photo, it is 3-10 layers of graphitized carbon material to show titanium dioxide granule surface cover matter.
Using the obtained compound of the carbon-coated titanium dioxide electrodes material of graphitization as anode material of lithium-ion battery,
It is 70 according to the mass ratio of active material and conductive agent acetylene black and binding agent sodium carboxymethylcellulose:15:15 are tuned into slurry, apply
It is distributed in drying on copper foil and obtains electrode plates, cut-parts are assembled into the button cell of CR2016 models in glove box after weighing, visit
Study carefully the electrochemistry storage sodium performance of composite material.As shown in figure 5, in 0.25C (83.75mA g-1) current density under, 200 are filled
Its specific discharge capacity is 189.5mAh g after discharge cycles-1, charge specific capacity is 188.8mAh g-1, show preferable storage sodium and hold
Amount.
Comparative example 1
It calcines at a lower temperature.
First by 1.0ml titanium chloride solutions (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyl trimethyl
Ammonium bromide (CTAB；It 0.58g) dissolves and to be dispersed in n-hexane (60ml) organic molten with mixing that n-amyl alcohol (10ml) is formed
It in agent, is then transferred in 100ml reaction kettles, solvent heat 6h is directly dried in vacuo and obtains organic matter and dioxy in 200 DEG C of baking ovens
Change the mixture of titanium precursors.Then in inert protective gas environment, 500 DEG C of calcining 2h, heating rate is 10 DEG C/min, from
So cooling.Obtain the black powder of amorphous carbon-coated titanium dioxide electrodes material.Fig. 6 is the amorphous carbon-coated of preparation
The transmission electron microscope photo of the compound of titanium dioxide electrodes material is rendered as titanium dioxide granule clad as amorphous carbon.Fig. 7
To coat the Raman spectrogram of carbon component in the composite material that is obtained in embodiment 1 with comparative example 1.Wherein, the power at D peaks
To the sp3 hybrid bonds, positive tetrahedron structure sp3 hybrid bonds and graphene edge of disordered carbon there are sp3 bond hybridization defects are related,
The power at G peaks is related to the sp2 hybrid bonds of plane body structure, and the carbon plane stacked in multi-layers of sp2 hydridization forms graphite-structure.It is logical
Chang Eryan uses IDKey/IG keysRatio embody the degree of graphitization of carbon component and randomness.As can be seen from Figure 7,500 DEG C calcining
I in composite material carbon componentD keys/IG keysRatio be more than 1, show that carbon component is mainly shown as unbodied structure, and 800 DEG C are forged
I in the composite material carbon component of burningD keys/IGThe ratio of key is less than 1, and be significantly less than D, G peak of the composite material of 500 DEG C of calcinings
Intensity rate shows that the carbon coating layer degree of graphitization that 800 DEG C of calcinings obtain is very high.
Using the obtained compound of amorphous carbon-coated titanium dioxide electrodes material as anode material of lithium-ion battery,
It is 70 according to the mass ratio of active material and conductive agent acetylene black and binding agent sodium carboxymethylcellulose:15:15 are tuned into slurry, apply
It is distributed in drying on copper foil and obtains electrode plates, cut-parts are assembled into the button cell of CR2016 models in glove box after weighing, visit
Study carefully the electrochemistry storage sodium performance of composite material.In 0.25C (83.75mA g-1) current density under, after 100 charge and discharge cycles
Its specific discharge capacity is 142.5mAh g-1, charge specific capacity is 141.8mAh g-1, slightly worse storage sodium capacity is shown, this can
It can be caused by the limited electrical conductivity of amorphous carbon coating layer.
Embodiment 2
First by 1.0ml titanium chloride solutions (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyl trimethyl
Ammonium bromide (CTAB；It 0.58g) dissolves and to be dispersed in n-hexane (60ml) organic molten with mixing that n-amyl alcohol (10ml) is formed
It in agent, is then transferred in 100ml reaction kettles, solvent heat 6h is directly dried in vacuo and obtains organic matter and dioxy in 200 DEG C of baking ovens
Change the mixture of titanium precursors.Then in inert protective gas environment, 900 DEG C of calcining 2h, heating rate is 10 DEG C/min, from
So cooling.Obtain being graphitized the black powder of carbon-coated titanium dioxide electrodes material.
Using the obtained compound of the carbon-coated titanium dioxide electrodes material of graphitization as anode material of lithium-ion battery,
It is 70 according to the mass ratio of active material and conductive agent acetylene black and binding agent sodium carboxymethylcellulose:15:15 are tuned into slurry, apply
It is distributed in drying on copper foil and obtains electrode plates, cut-parts are assembled into the button cell of CR2016 models in glove box after weighing, visit
Study carefully the electrochemistry storage sodium performance of composite material.In 0.25C (83.75mA g-1)、0.5C(167.5mA g-1)、1C(335mA g-1)、2.5C(670mA g-1).5C(1675mA g-1)、7.5C(1675mA g-1) different current densities under, reversible charge ratio
Capacity is respectively 190.7mAh g-1、180.mAh g-1、171.4mAh g-1、142.4mAh g-1、120.5mAh g-1、
93.1mAh g-1, show preferable storage sodium high rate performance.
Embodiment 3
First by 1.0ml titanium chloride solutions (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyl trimethyl
Ammonium bromide (CTAB；It 0.58g) dissolves and to be dispersed in n-hexane (60ml) organic molten with mixing that n-hexyl alcohol (10ml) is formed
It in agent, is then transferred in 100ml reaction kettles, solvent heat 6h is directly dried in vacuo and obtains organic matter and dioxy in 200 DEG C of baking ovens
Change the mixture of titanium precursors.Then in inert protective gas environment, 800 DEG C of calcining 2h, heating rate is 10 DEG C/min, from
So cooling.Obtain being graphitized the black powder of carbon-coated titanium dioxide electrodes material.Fig. 8 is that the graphitization prepared is carbon-coated
The transmission electron microscope photo of the compound of titanium dioxide electrodes material is rendered as titanium dioxide granule clad as graphitized carbon knot
Structure, still, degree of graphitization are apparent not as good as embodiment 1.
Using the obtained compound of the carbon-coated titanium dioxide electrodes material of graphitization as anode material of lithium-ion battery,
It is 70 according to the mass ratio of active material and conductive agent acetylene black and binding agent sodium carboxymethylcellulose:15:15 are tuned into slurry, apply
It is distributed in drying on copper foil and obtains electrode plates, cut-parts are assembled into the button cell of CR2016 models in glove box after weighing, visit
Study carefully the electrochemistry storage sodium performance of composite material.In 0.25C (83.75mA g-1) current density under, first charge-discharge specific capacity point
It Wei not 186.2mAh g-1With 461.4mAh g-1, coulombic efficiency is 40.35% for the first time, shows preferably to store up sodium invertibity.
Embodiment 4
First by 357mg cobalt chloride hexahydrate solutions and a certain amount of cetyl trimethylammonium bromide (CTAB；0.58g)
It dissolves and is dispersed in the mixed organic solvents that n-hexane (60ml) is formed with n-amyl alcohol (10ml), be then transferred to 100ml
In reaction kettle, solvent heat 6h is directly dried in vacuo and obtains the mixture of organic matter and TiO 2 precursor in 200 DEG C of baking ovens.
Then in inert protective gas environment, 800 DEG C calcining 2h, heating rate be 10 DEG C/min, Temperature fall.Obtain graphitized carbon
The cobalt oxide combination electrode material of cladding.
Using the obtained compound of the carbon-coated cobalt oxide electrode material of graphitization as lithium ion battery negative material, press
It is 70 according to the mass ratio of active material and conductive agent acetylene black and binding agent sodium carboxymethylcellulose:15:15 are tuned into slurry, coating
Electrode plates are obtained in drying on copper foil, cut-parts are assembled into the button cell of CR2016 models in glove box, probe into after weighing
The electrochemical lithium storage performance of composite material.In 200mA g-1Current density under, its specific discharge capacity after 100 charge and discharge cycles
For 919.2mAh g-1, charge specific capacity is 901.3mAh g-1, show preferable storage lithium performance.
Embodiment 5
First by 1.0ml titanium chloride solutions (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyl trimethyl
Ammonium bromide (CTAB；It 0.58g) dissolves and to be dispersed in n-hexane (60ml) organic molten with mixing that n-amyl alcohol (10ml) is formed
It in agent, is then transferred in 100ml reaction kettles, solvent heat 6h is directly dried in vacuo and obtains organic matter and dioxy in 200 DEG C of baking ovens
Change the mixture of titanium precursors.Then in inert protective gas environment, 850 DEG C of calcining 2h, heating rate is 10 DEG C/min, from
So cooling.Obtain being graphitized the black powder of carbon-coated titanium dioxide electrodes material.
Using the obtained compound of the carbon-coated titanium dioxide electrodes material of graphitization as lithium ion battery negative material,
It is 70 according to the mass ratio of active material and conductive agent acetylene black and binding agent sodium carboxymethylcellulose:15:15 are tuned into slurry, apply
It is distributed in drying on copper foil and obtains electrode plates, cut-parts are assembled into the button cell of CR2016 models in glove box after weighing, visit
Study carefully the electrochemical lithium storage performance of composite material.In 0.5C (167.5mA g-1) current density under, after 100 charge and discharge cycles its
Specific discharge capacity is 210.8mAh g-1, charge specific capacity is 209.6mAh g-1, show preferable electrochemical lithium storage performance.
Claims (10)
1. a kind of preparation method of graphitized carbon jacketed electrode material, it is characterised in that：By organic matter and electrode material or electrode
The mixed material of material precursor is placed under protective atmosphere, 800~2000 DEG C of temperature lower calcinations to get；The mixed material
In include iron, titanium, copper, cobalt, at least one of nickel metallic element.
2. a kind of preparation method of graphitized carbon jacketed electrode material according to claim 1, it is characterised in that：It is described to have
Machine object includes C6~C16Alkane, C5~C11Alcohol compound, C7~C15Aromatic compounds, heteroaromatic class compound,
In saccharide compound, cellulose, polyacrylonitrile, povidone, polyvinyl chloride, polyethylene glycol, Kynoar, polyacrylic acid extremely
Few one kind.
3. a kind of preparation method of graphitized carbon jacketed electrode material according to claim 2, it is characterised in that：It is described to have
Machine object is by C6~C16Alkane and C5~C11Alcohol compound by volume be 1:10~10:1 composition.
4. a kind of preparation method of graphitized carbon jacketed electrode material according to claim 3, it is characterised in that：It is described to have
Machine object is by n-hexane and n-amyl alcohol by volume 1~10:1 composition.
5. according to a kind of preparation method of graphitized carbon jacketed electrode material of Claims 1 to 4 any one of them, feature exists
In：
The electrode material includes positive electrode or negative material；
The positive electrode material include LiFePO4, cobalt acid lithium, LiMn2O4, lithium nickelate, at least one of nickel cobalt manganese lithium or
For AxMO2, A=Li and/or at least one of Na, M=Fe, Cr, V or be XOm n-, X=P or S or be AxM2(PO4)3, A
=Li and/or at least one of Na, M=V, Fe, Ti；
The negative electrode material include carbon-based material, silicon materials, metal oxide, metal sulfide, spinel type lithium titanate,
Na4Ti5O12、NaTiO2、Na2TinO2n+1, titanium sulfide, titanium carbide, Na2Ti2(PO4)3At least one of；Wherein, 2<n<9.
6. according to a kind of preparation method of graphitized carbon jacketed electrode material of Claims 1 to 4 any one of them, feature exists
In：
The electrode material presoma is to generate positive electrode by reaction or generate the raw material of negative material.
7. according to a kind of preparation method of graphitized carbon jacketed electrode material of Claims 1 to 4 any one of them, feature exists
In：The calcination time is 0.5~10h.
8. a kind of graphitized carbon jacketed electrode material, it is characterised in that：It is prepared by any one of claim 1~6 method.
9. a kind of graphitized carbon jacketed electrode material according to claim 8, it is characterised in that：The graphitized carbon cladding
The mass percentage content of electrode material is 5~98% in electrode material.
10. the application of the graphitized carbon jacketed electrode material described in claim 8 or 9, it is characterised in that：As electrochemical energy storage
The electrode material application of device.
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