CN109616700A - A kind of modified prelithiation material and preparation method thereof and lithium battery - Google Patents
A kind of modified prelithiation material and preparation method thereof and lithium battery Download PDFInfo
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- CN109616700A CN109616700A CN201811440959.1A CN201811440959A CN109616700A CN 109616700 A CN109616700 A CN 109616700A CN 201811440959 A CN201811440959 A CN 201811440959A CN 109616700 A CN109616700 A CN 109616700A
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M10/05—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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- 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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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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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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Abstract
The invention discloses a kind of modified prelithiation material and preparation method thereof and lithium battery, the modified prelithiation material includes at least kernel prelithiation material；Wherein, the general formula of the kernel prelithiation material is Lit(FexM1y)(OaM2b), 2≤t≤6, x+y=1, a+b=4；0.5≤x≤1,0≤y≤0.5；0 b≤2 <；Wherein M1 is metallic element, one or more mixing including alkali metal element, alkali earth metal, transition metal element；M2 is one or more mixing of F, S, N, Br, Cl.
Description
Technical field
The present invention relates to lithium battery material technical field more particularly to a kind of modified prelithiation material and preparation method thereof and
Lithium battery.
Background technique
Output voltage is high, energy density is high, have extended cycle life, have a safety feature, memoryless effect because having for lithium ion battery
The features such as answering is successfully applied to mobile power source field as main energy storage device.For further satisfaction power grid energy storage, electronic
The demand of automobile and consumer electronics product to energy storage device, more long circulation life, safety is more preferable, energy density is higher
Electrode material and lithium battery system become research hotspot.
Commercial Li-ion battery cathode mainly uses graphite material at present, and the theoretical capacity of graphite material is in 372mAh/
G limits the specific capacity of lithium ion battery entirety.With the alloy material of cathode of higher theoretical capacity gradually replace graphite material at
For trend.However with lithium ion irreversible reaction occurs for most of height ratio capacity negative electrode material generally existing first weeks, to consume
Lithium source in lithium battery reduces battery entirety specific capacity.
Therefore solve the problems, such as that all low efficiencys of the head of the alloy material of cathode of height ratio capacity become key.Wherein prelithiation skill
Art proposes to become most possible solution in the first week supplement lithium ion of Battery formation.However existing prelithiation technology is big
The problems such as there are prelithiation amounts to be difficult to control for part, prelithiation amount is small, there are side reactions, therefore there is an urgent need to propose a kind of pre- lithium
Change material and preparation method thereof to make up this technical bottleneck.
Summary of the invention
The present invention provides a kind of modified prelithiation material and preparation method thereof and lithium battery, modification prelithiation of the invention
Material can greatly improve the capacity of lithium battery, and preparation method is simple, abundant raw materials low to environmental requirement, is applicable in
In large-scale production.
In a first aspect, including at least kernel prelithiation material the embodiment of the invention provides a kind of modified prelithiation material；
Wherein, the general formula of the kernel prelithiation material is Lit(FexM1y)(OaM2b), 2≤t≤6, x+y=1, a+b=
4；0.5≤x≤1,0≤y≤0.5；0 b≤2 <；Wherein M1 is metallic element, including alkali metal element, alkali earth metal, mistake
Cross one or more mixing of metallic element；M2 is one or more mixing of F, S, N, Br, Cl.
Preferably, the modified prelithiation material is combined by the kernel prelithiation material and carbon material；
The carbon material includes: one or more combinations of agraphitic carbon, graphene, carbon nanotube, electrically conductive graphite；
In the modified prelithiation material, the carbon material is uniformly or non-uniformly coated on the kernel prelithiation material
Surface or the kernel prelithiation material be dispersed in the carbon material；The carbon material and the kernel prelithiation material
The mass ratio of material is between 1:1000-1:1.
It is further preferred that the mass ratio of the carbon material and the kernel prelithiation material is between 1:1000-1:20.
Preferably, the M1 specifically includes aluminium, titanium, iron, vanadium, tungsten, niobium, tantalum, zirconium, lanthanum, manganese, magnesium, calcium, cobalt, nickel, zinc, barium
It is one or more.
Preferably, the granularity of the modified prelithiation material is 100nm-20um, and particle proterties are round, ellipse, piece
Shape or polygon it is one or more.
Preferably, the de- lithium capacity of the modified prelithiation material is 300mAh/g-800mAh/g, and taking off lithium voltage is 3-
5V。
Second aspect, the embodiment of the invention provides a kind of preparations of modification prelithiation material described in above-mentioned first aspect
Method, comprising:
By the raw material of modified prelithiation material, alternatively, the raw material and carbon source material of the modified prelithiation material, are pressed
It is put into mixing apparatus according to stoichiometric ratio and is uniformly mixed, obtain mixture；Wherein, the original of the modified prelithiation material
Material include the respective oxide of several elements of Li, Fe, M1 and M2, hydroxide, carbonate, phosphate, ammonium salt, organic salt with
And metallic compound；Wherein M1 is metallic element, one kind including alkali metal element, alkali earth metal, transition metal element
Or a variety of mixing；M2 is one or more mixing of F, S, N, Br, Cl；The carbon source material is carbohydrate, bitumen, polymerization
Species precursor, granularity is between 10nm-10um；
The mixture is put into agglomerating plant and is sintered, sintering temperature between 300 DEG C -900 DEG C, obtain half at
Product material；
The semi-finished product material is put into crushing plant and carries out primary breakup；
Semifinished material investment disintegrating apparatus after the primary breakup is crushed, the modified prelithiation material is obtained
Material.
Preferably, the mixing apparatus includes: double movement mixers, three-dimensional mixer, V-Mixer, single cone double helix
One of mixing machine, slot type spiral ribbon mixer and horizontal Agravicmixer；
The agglomerating plant includes: one of batch-type furnace, tube furnace, roller-way cellar and rotary furnace；
The crushing plant includes: jaw crusher, gyratory crusher, impact breaker, hammer mill and roll-type
One of crusher；
The disintegrating apparatus includes: flat air flow crusher, fluidized bed airflow pulverizer, circulating air-flow crushing
Machine, impacting breakers, expansion type crusher, ball mill pulverizer, high speed rotation throwing type pulverizer and high speed rotation impacting type
One of pulverizer；
The sintering specifically includes: in air atmosphere, vacuum atmosphere, nitrogen atmosphere, argon atmosphere, argon nitrogen atmosphere or oxygen
It is sintered under atmosphere.
Preferably, after the semifinished material investment disintegrating apparatus by after the primary breakup is crushed, institute
State method further include:
Carbon coating processing is carried out to the primary finished product obtained after the crushing again, obtains the modified prelithiation material；
Wherein, the carbon coating processing specifically includes solid phase method or vapor phase method；
The solid phase method includes: to mix the presoma of carbon with the primary finished product, in 400 DEG C of -1500 DEG C of inertia
It is heat-treated under atmosphere；Wherein, the presoma of the carbon includes: carbohydrate, bitumen, polymerization species precursor；
The vapor phase method includes: to choose one of acetylene, methane, ethylene, toluene or several combinations, to described first
Grade finished product carries out gas phase cladding processing at 800 DEG C -1200 DEG C.
The third aspect, the embodiment of the invention provides a kind of including modification prelithiation material described in above-mentioned first aspect
Lithium battery.
Modification prelithiation material specific capacity of the invention can be in 300mAh/g-800mAh/g, and existing positive electrode ratio
Capacity is often below 200mAh/g, therefore the lithium ion of first week consumption can be supplemented using modification prelithiation material of the invention,
The capacity of lithium battery can greatly be promoted.Preparation method is simple, abundant raw materials low to environmental requirement, is suitable for big rule
Mould production.
Detailed description of the invention
Below by drawings and examples, the technical solution of the embodiment of the present invention is described in further detail.
Fig. 1 is scanning electron microscope (SEM) figure of modified prelithiation material provided in an embodiment of the present invention；
Fig. 2 is X-ray diffraction (XRD) figure of modified prelithiation material provided in an embodiment of the present invention；
Fig. 3 is the preparation method flow chart of modified prelithiation material provided in an embodiment of the present invention.
Specific embodiment
Below with reference to embodiment, the present invention is further described in detail, but is not intended to limit guarantor of the invention
Protect range.
The embodiment of the invention provides a kind of modified prelithiation material, kernel prelithiation material is included at least, it can also be by
Kernel prelithiation material and carbon material are combined；Wherein, the general formula of kernel prelithiation material is Lit(FexM1y)(OaM2b), 2
≤ t≤6, x+y=1, a+b=4；0.5≤x≤1,0≤y≤0.5；0 b≤2 <；Wherein M1 is metallic element, including alkali metal
One or more mixing of element, alkali earth metal, transition metal element, specifically include aluminium, titanium, iron, vanadium, tungsten, niobium, tantalum,
Zirconium, lanthanum, manganese, magnesium, calcium, cobalt, nickel, zinc, barium it is one or more；M2 is one or more mixing of F, S, N, Br, Cl；
In the modification prelithiation material being combined by kernel prelithiation material and carbon material, carbon material includes: without fixed
One or more combinations of type carbon, graphene, carbon nanotube, electrically conductive graphite.In modified prelithiation material, carbon material is uniformly or not
The surface or kernel prelithiation material for being uniformly coated on kernel prelithiation material are dispersed in carbon material；Carbon material with it is interior
The mass ratio of core prelithiation material is between 1:1000-1:1, it is preferred that between 1:1000-1:20.Modified prelithiation material
Granularity be 100nm-20um, particle proterties are the one or more of round, ellipse, sheet or polygon.Under the present invention
State in embodiment 1, scanning electron microscope (SEM) figure of specific modified prelithiation material as shown in Figure 1, material X-ray
Diffraction (XRD) figure has no miscellaneous as shown in Fig. 2, modified prelithiation material made from the present embodiment is pure phase as can be seen from Figure 2
It generates.
The de- lithium capacity of modified prelithiation material provided by the invention is 300mAh/g-800mAh/g, and taking off lithium voltage is 3-
5V；It is used in lithium battery, the capacity of lithium battery can greatly be promoted.
The present invention also provides the preparation method of modified prelithiation material, key step is as shown in figure 3, include following step
It is rapid:
Step 110, by the raw material of modified prelithiation material, alternatively, the raw material and carbon source material of modified prelithiation material
Material, is put into mixing apparatus according to stoichiometric ratio and is uniformly mixed, obtain mixture；
Wherein, the raw material of modified prelithiation material include the respective oxide of several elements of Li, Fe, M1 and M2, hydrogen-oxygen
Compound, carbonate, phosphate, ammonium salt, organic salt and metallic compound；Wherein M1 be metallic element, including alkali metal element,
One or more mixing of alkali earth metal, transition metal element；M2 is one or more mixing of F, S, N, Br, Cl；Carbon
Source material is carbohydrate, bitumen, polymerization species precursor, and granularity is between 10nm-10um；
Mixing apparatus includes: double movement mixers, three-dimensional mixer, V-Mixer, single cone double worm mixer, slot type
One of spiral ribbon mixer and horizontal Agravicmixer.
Step 120, mixture is put into agglomerating plant and is sintered, sintering temperature obtains between 300 DEG C -900 DEG C
Semi-finished product material；
Wherein, agglomerating plant includes: one of batch-type furnace, tube furnace, roller-way cellar and rotary furnace.
Sintering refer under air atmosphere, vacuum atmosphere, nitrogen atmosphere, argon atmosphere, argon nitrogen atmosphere or oxygen atmosphere into
Row sintering.
Step 130, semi-finished product material is put into crushing plant and carries out primary breakup；
Crushing plant includes: jaw crusher, gyratory crusher, impact breaker, hammer mill and roll crushing
One of machine.
Step 140, the semifinished material investment disintegrating apparatus after primary breakup is crushed, obtains modified prelithiation material
Material.
Wherein, disintegrating apparatus includes: flat air flow crusher, fluidized bed airflow pulverizer, circulating air-flow crushing
Machine, impacting breakers, expansion type crusher, ball mill pulverizer, high speed rotation throwing type pulverizer and high speed rotation impacting type
One of pulverizer.
It preferably, can also be first right after being crushed the semifinished material investment disintegrating apparatus after primary breakup
The primary finished product obtained after crushing carries out carbon coating processing again, to obtain modified prelithiation material.
Carbon coating processing can specifically include solid phase method or vapor phase method；
Solid phase method, which refers to, mixes the presoma of carbon with primary finished product, carries out under 400 DEG C of -1500 DEG C of inert atmospheres
Heat treatment；Wherein, the presoma of carbon includes: carbohydrate, bitumen, polymerization species precursor；
Vapor phase method, which refers to, chooses one of acetylene, methane, ethylene, toluene or several combinations, exists to primary finished product
The processing of gas phase cladding is carried out at 800 DEG C -1200 DEG C.
Modification prelithiation material preparation method of the invention is simple, abundant raw materials low to environmental requirement, is suitable for big rule
Mould production.
Below by some specific examples, technical solution of the present invention is further elaborated.
Embodiment 1
Present embodiments provide a kind of modified prelithiation material Li5(Fe0.8AL0.2)O4.Its preparation process is according to corresponding
Stoichiometric ratio weighs the alumina material that granularity is the lithium carbonate of 1um, the iron oxide of 500nm, 10nm.Three kinds of raw material are put
It is placed in the mixing of V cone screw mixer high speed, revolving speed 400rpm, incorporation time is 1 hour.Mixture is taken out, is placed in
It is sintered in atmosphere batch-type furnace.Be passed through nitrogen atmosphere, the specific procedure of sintering are as follows: room temperature to 900 DEG C, 5 DEG C of heating rate/
Min keeps the temperature 48 hours, Temperature fall.Semi-finished product after sintering are crushed using jaw crusher, using air-flow crushing
Machine is crushed, and modified prelithiation material is obtained.Its SEM figure is as shown in Figure 1, XRD spectrum is as shown in Figure 2.Prepared by the present embodiment
Modification prelithiation material carry out half-cell electrochemical property test, its specific capacity of test result be 420mAh/g.
Embodiment 2
Present embodiments provide a kind of modified prelithiation material Li5(Fe0.8AL0.2)O4.Its preparation process is according to corresponding
Stoichiometric ratio weighs the alumina material that granularity is the lithium carbonate of 1um, the iron oxide of 500nm, 10nm.By three kinds of raw material and
Carbon source material glucose is placed in the mixing of V cone screw mixer high speed, revolving speed 400rpm, and incorporation time is 1 hour.Its
The ratio between middle glucose and three kinds of raw material gross masses are 1:2.Mixture is taken out, is placed in atmosphere batch-type furnace and is sintered.It is logical
Enter argon atmosphere, the specific procedure of sintering are as follows: room temperature keeps the temperature 48 hours, Temperature fall to 900 DEG C, 5 DEG C/min of heating rate.
Semi-finished product after sintering are crushed using jaw crusher, are crushed using airslide disintegrating mill, obtain being modified pre- lithium
Change material.X-ray diffraction (XRD) figure of material is as shown in Figure 2.
Embodiment 3
Present embodiments provide a kind of modified prelithiation material Li4.8FeO3.8F0.2.Its preparation process is according to correspondingization
Metering is learned than weighing the fluorination lithium material that granularity is the lithium carbonate of 1um, the iron oxide of 500nm, the alumina material of 10nm, 1um.
Four kinds of raw material and carbon source material glucose are placed in V cone screw mixer high speed to mix, revolving speed 400rpm, mixing
Time is 1 hour.Wherein the ratio between glucose and three kinds of raw material gross masses are 1:1.Mixture is taken out, atmosphere batch-type furnace is placed in
In be sintered.It is passed through argon atmosphere, the specific procedure of sintering are as follows: for room temperature to 850 DEG C, 5 DEG C/min of heating rate, heat preservation 48 is small
When, Temperature fall.Semi-finished product after sintering are crushed using jaw crusher, are crushed using airslide disintegrating mill,
Obtain modified prelithiation material.
Embodiment 4
Present embodiments provide a kind of modified prelithiation material Li5FeO3.8S0.2.Its preparation process is according to correspondingization
Metering is learned than weighing the lithium sulfide material that granularity is the lithium carbonate of 1um, the iron oxide of 500nm, the alumina material of 10nm, 500nm
Material.Four kinds of raw material and carbon source material glucose are placed in V cone screw mixer high speed to mix, revolving speed 400rpm,
Incorporation time is 1 hour.Wherein the ratio between glucose and three kinds of raw material gross masses are 1:1.Mixture is taken out, atmosphere box is placed in
It is sintered in formula furnace.It is passed through argon atmosphere, the specific procedure of sintering are as follows: room temperature is to 850 DEG C, 5 DEG C/min of heating rate, heat preservation
48 hours, Temperature fall.Semi-finished product after sintering are crushed using jaw crusher, carry out powder using airslide disintegrating mill
It is broken, obtain modified prelithiation material.
Embodiment 5
Present embodiments provide a kind of modified prelithiation material Li4.6(Fe0.8Ti0.2)O3.8S0.2.Its preparation process be according to
Corresponding stoichiometric ratio weighs titanic oxide material, the 500nm that granularity is the lithium carbonate of 1um, the iron oxide of 500nm, 100nm
Lithium sulfide.Four kinds of raw material are placed in V cone screw mixer high speed to mix, revolving speed 400rpm, incorporation time 1
Hour.Mixture is taken out, is placed in atmosphere batch-type furnace and is sintered.It is passed through argon atmosphere, the specific procedure of sintering are as follows: room temperature
To 850 DEG C, 5 DEG C/min of heating rate, 48 hours are kept the temperature, Temperature fall.Will sintering after semi-finished product using jaw crusher into
Row is broken, is crushed using airslide disintegrating mill, obtains primary finished product, primary finished product is placed in tube furnace, in argon gas gas
Under atmosphere, using toluene as presoma, carbon coating is carried out, coating reaction condition is 900 DEG C and keeps the temperature 5 hours.Treated, and sample is
Modified prelithiation material.
Embodiment 6
Present embodiments provide a kind of modified prelithiation material Li4.9FeO3.9F0.1.Its preparation process is according to correspondingization
Metering is learned than weighing the lithium fluoride that granularity is the lithium carbonate of 1um, the iron oxide of 500nm, 500nm.By three kinds of raw material and carbon source
Material sucrose is placed in the mixing of V cone screw mixer high speed, revolving speed 400rpm, and incorporation time is 1 hour.Wherein carbon source
The ratio between material and three kinds of raw material gross masses are 1:5.Mixture is taken out, is placed in atmosphere batch-type furnace and is sintered.It is passed through nitrogen
Gas atmosphere, the specific procedure of sintering are as follows: room temperature keeps the temperature 48 hours, Temperature fall to 900 DEG C, 5 DEG C/min of heating rate.It will burn
Semi-finished product are crushed using jaw crusher after knot, are crushed using airslide disintegrating mill, and modified prelithiation material is obtained
Material.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of modified prelithiation material, which is characterized in that the modified prelithiation material includes at least kernel prelithiation material；
Wherein, the general formula of the kernel prelithiation material is Lit(FexM1y)(OaM2b), 2≤t≤6, x+y=1, a+b=4；0.5
≤ x≤1,0≤y≤0.5；0 b≤2 <；Wherein M1 is metallic element, including alkali metal element, alkali earth metal, transition gold
Belong to one or more mixing of element；M2 is one or more mixing of F, S, N, Br, Cl.
2. modified prelithiation material according to claim 1, which is characterized in that the modified prelithiation material is by described interior
Core prelithiation material and carbon material are combined；
The carbon material includes: one or more combinations of agraphitic carbon, graphene, carbon nanotube, electrically conductive graphite；
In the modified prelithiation material, the carbon material is uniformly or non-uniformly coated on the table of the kernel prelithiation material
Face or the kernel prelithiation material are dispersed in the carbon material；The carbon material and the kernel prelithiation material
Mass ratio is between 1:1000-1:1.
3. modified prelithiation material according to claim 2, which is characterized in that the carbon material and the kernel prelithiation
The mass ratio of material is between 1:1000-1:20.
4. modified prelithiation material according to claim 1, which is characterized in that the M1 specifically include aluminium, titanium, iron, vanadium,
Tungsten, niobium, tantalum, zirconium, lanthanum, manganese, magnesium, calcium, cobalt, nickel, zinc, barium it is one or more.
5. modified prelithiation material according to claim 1, which is characterized in that the granularity of the modified prelithiation material is
100nm-20um, particle proterties are the one or more of circle, ellipse, sheet or polygon.
6. modified prelithiation material according to claim 1, which is characterized in that the de- lithium of the modified prelithiation material holds
Amount is 300mAh/g-800mAh/g, and taking off lithium voltage is 3-5V.
7. a kind of preparation method of modified prelithiation material, which is characterized in that the preparation method includes:
The raw material of prelithiation material will be modified, alternatively, the raw material and carbon source material of the modified prelithiation material, according to change
It learns metering uniformly to be mixed than being put into mixing apparatus, obtains mixture；Wherein, the raw material of the modified prelithiation material
Including the respective oxide of several elements of Li, Fe, M1 and M2, hydroxide, carbonate, phosphate, ammonium salt, organic salt and gold
Belong to compound；Wherein M1 is metallic element, including alkali metal element, alkali earth metal, one kind of transition metal element or more
Kind mixing；M2 is one or more mixing of F, S, N, Br, Cl；The carbon source material is carbohydrate, bitumen, polymerization species
Precursor, granularity is between 10nm-10um；
The mixture is put into agglomerating plant and is sintered, sintering temperature obtains semi-finished product between 300 DEG C -900 DEG C
Material；
The semi-finished product material is put into crushing plant and carries out primary breakup；
Semifinished material investment disintegrating apparatus after the primary breakup is crushed, the modified prelithiation material is obtained.
8. preparation method according to claim 7, which is characterized in that
The mixing apparatus includes: double movement mixers, three-dimensional mixer, V-Mixer, single cone double worm mixer, slot type
One of spiral ribbon mixer and horizontal Agravicmixer；
The agglomerating plant includes: one of batch-type furnace, tube furnace, roller-way cellar and rotary furnace；
The crushing plant includes: jaw crusher, gyratory crusher, impact breaker, hammer mill and roll crushing
One of machine；
The disintegrating apparatus includes: flat air flow crusher, fluidized bed airflow pulverizer, circulating airslide disintegrating mill, hits
Impact crusher, expansion type crusher, ball mill pulverizer, high speed rotation throwing type pulverizer and high speed rotation impacting type pulverizer
One of；
The sintering specifically includes: in air atmosphere, vacuum atmosphere, nitrogen atmosphere, argon atmosphere, argon nitrogen atmosphere or oxygen atmosphere
Under be sintered.
9. the preparation method of modified prelithiation material according to claim 7, which is characterized in that described by the primary
After broken semifinished material investment disintegrating apparatus is crushed, the method also includes:
Carbon coating processing is carried out to the primary finished product obtained after the crushing again, obtains the modified prelithiation material；
Wherein, the carbon coating processing specifically includes solid phase method or vapor phase method；
The solid phase method includes: to mix the presoma of carbon with the primary finished product, in 400 DEG C of -1500 DEG C of inert atmospheres
Under be heat-treated；Wherein, the presoma of the carbon includes: carbohydrate, bitumen, polymerization species precursor；
The vapor phase method includes: to choose acetylene, methane, ethylene, one of toluene or several combinations, to it is described it is primary at
Product carry out gas phase cladding processing at 800 DEG C -1200 DEG C.
10. a kind of lithium battery including any modification prelithiation material of the claims 1-6.
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| CN112467114A (en) * | 2020-11-30 | 2021-03-09 | 湖南中科星城石墨有限公司 | Silica composite material, preparation method thereof and lithium ion battery |
| CN112490415A (en) * | 2019-09-12 | 2021-03-12 | 湖南杉杉能源科技股份有限公司 | Lithium ion anode material lithium supplement additive and preparation method thereof |
| CN113353992A (en) * | 2021-01-05 | 2021-09-07 | 厦门厦钨新能源材料股份有限公司 | Pre-lithium material and preparation method thereof |
| CN117239104A (en) * | 2023-11-13 | 2023-12-15 | 宁德时代新能源科技股份有限公司 | Lithium supplementing additive, positive pole piece, battery and electricity utilization device |
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