CN108807922A - A kind of negative electrode active material of lithium battery and preparation method thereof - Google Patents
A kind of negative electrode active material of lithium battery and preparation method thereof Download PDFInfo
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- CN108807922A CN108807922A CN201810643170.XA CN201810643170A CN108807922A CN 108807922 A CN108807922 A CN 108807922A CN 201810643170 A CN201810643170 A CN 201810643170A CN 108807922 A CN108807922 A CN 108807922A
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- negative electrode
- electrode active
- active material
- lithium
- shell
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
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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 discloses a kind of negative electrode active material of lithium battery and preparation method thereof, material is made of nano-grade porous aerogel, crystalline carbon, superconduction carbon black, binder Kynoar, lithium alloys and amorphous carbon, and dispensing percentage is：Nano-grade porous aerogel 5%~10%；Crystalline carbon 40%~60%；Superconduction carbon black 3%~8%；Binder Kynoar 5%~10%；Lithium alloys 15%~20%；Amorphous carbon 7%~12%, nano-grade porous aerogel are using resorcinol and formaldehyde as precursor reagent, and sodium silicate solution is catalyst.The negative electrode active material of the present invention is made of nano-grade porous aerogel, crystalline carbon, superconduction carbon black, binder Kynoar, lithium alloys and amorphous carbon, the intensity and thermal conductivity of negative electrode active material entirety can be improved, preparation method is simple simultaneously, outfit is easy to get, and reduces the production cost of negative electrode active material.
Description
Technical field
The present invention relates to technical field of lithium batteries, the negative electrode active material of specially a kind of lithium battery and its preparation side
Method.
Background technology
Demand rapid growth of the electronic information epoch to mobile power, since lithium ion battery has high voltage, high power capacity
And the features such as having extended cycle life, having a safety feature, make it in portable electronic device, electric vehicle, space technology, national defence work
The various aspects such as industry have broad application prospects, and become the research hotspot widely paid close attention in recent years, although using the small of carbon electrode
Type rechargeable lithium ion batteries have been commercialized, and are used widely, and still, how to be further increased than energy, specific power
(discharge current), cycle life, to reduce the problems such as cost still assistant officer to be solved, and the environmentally friendly declaration in the whole world recently require high-energy,
High power, high security extended-life lithium ion battery be more applied to large-scale accumulator and electric vehicle in the near future
Equal fields, this undoubtedly proposes requirements at the higher level to li-ion electrode materials, and performance of lithium ion battery is strongly dependent on electrode
Material, especially negative material, but its integral strength of existing negative material and thermal conductivity are low, reduce its service life,
For this purpose, it is proposed that a kind of negative electrode active material of lithium battery.
Invention content
It is above-mentioned to solve the purpose of the present invention is to provide a kind of negative electrode active material of lithium battery and preparation method thereof
The problem of being proposed in background technology.
To achieve the above object, the present invention provides the following technical solutions：A kind of negative electrode active material of lithium battery, material
Material is made of nano-grade porous aerogel, crystalline carbon, superconduction carbon black, binder Kynoar, lithium alloys and amorphous carbon,
Its dispensing percentage is：Nano-grade porous aerogel 5%~10%；Crystalline carbon 40%~60%；Superconduction carbon black 3%~8%；It is viscous
Tie agent Kynoar 5%~10%；Lithium alloys 15%~20%；Amorphous carbon 7%~12%.
Preferably, the nano-grade porous aerogel is using resorcinol and formaldehyde as precursor reagent, and sodium metasilicate is molten
Liquid is catalyst, through Temperature Treatment, solvent replacement, constant pressure and dry, high temperature carbonization, gas activation and be made, and nanoporous carbon
The aperture of aeroge is 100~200nm, and specific surface area is 2000~3500m2/g, and resistivity is less than or equal to 0.2 Ω cm.
Preferably, the lithium alloys be the alpha+beta containing two-phase magnesium lithium alloy, and the magnesium lithium alloy of the alpha+beta containing two-phase by Li,
The group of Cu, In, Mo, Zr, Fe, Al and Mg, weight percent meter alloy become：Li：7.0~10.0wt.%；Cu：1.0~
2.0wt.%；In：1.0~3.0wt.%；Mo：0.2~0.4wt.%；Zr：0.25~0.35wt.%；Fe：0.22~
0.35wt.%；Al：0.25~0.42wt.%；Mg surpluses.
Preferably, the lithium alloys are that the magnesium lithium alloy preparation method of the alpha+beta containing two-phase is：By Li, Cu, In, Mo,
Zr, Fe, Al and Mg are added in the electric induction furnace of argon gas protection, and use silicon carbide crucible, and sensing heating is to 800~900 DEG C
Alloy solution is formed, and 8~12min or so is sufficiently stirred using electromagnetic agitation effect, then by alloy liquid 700~750
DEG C heat preservation, which stands to be cast in waterglass or graphite jig after 8min, carries out casting and forming.
Preferably, preparation method includes the following steps：
A, by the nano-grade porous aerogel of formula ratio, crystalline carbon, superconduction carbon black, binder Kynoar and amorphous
Carbon uses grinding device grind into powder；
B, the mixture after grinding is screened by the sieve of 60 molybdenums, and underproof raw material is reapposed over and is ground
Secondary grinding is carried out in mill apparatus, until its qualification；
C, qualified mixture is put into blender, and toluene cyclohexanone is added, 20~40min is mixed；
D, mixed liquor is uniformly applied on lithium alloys, negative electrodes for lithium batteries is obtained after dry.
Preferably, the grinding device includes shell, and the upper end of housing cavity is movably installed with first rotating shaft, and first turn
The outer surface of axis is fixedly connected with crushing tooth, and the middle-end of housing cavity is fixedly connected with partition board, and the left and right ends at the top of partition board
It is embedded with heating plate, the middle-end of partition board inner surface offers the first discharge port, and the bottom of the first discharge port is movably installed with
The lower end of solenoid valve, housing cavity is movably installed with the second shaft, and the outer surface of the second shaft is fixedly connected with mixing roll, shell
Right end at the top of body is installed with motor, and the output shaft of motor is sequentially connected by belt and first rotating shaft, first rotating shaft
It is connect with the second rotating shaft transmission by belt.
Preferably, the left end of the case top offers feed inlet, and the right end at the top of feed inlet passes through hinge activity
It is connected with cover board, the upper end on the left of shell is fixedly connected with controller, and fixation connects successively from back to front for the outer surface of controller
It is connected to motor switch, electromagnetic valve switch and temperature adjustment knob, the bottom on the left of shell offers the second discharge port, and second goes out
The inner cavity of material mouth is plugged with snap-gauge.
Compared with prior art, beneficial effects of the present invention are as follows：
The negative electrode active material of the present invention is by nano-grade porous aerogel, crystalline carbon, superconduction carbon black, binder polyvinylidene fluoride
Alkene, lithium alloys and amorphous carbon composition, can be improved the intensity and thermal conductivity of negative electrode active material entirety, while its preparation side
Method is simple, and outfit is easy to get, and reduces the production cost of negative electrode active material.
Description of the drawings
Fig. 1 is dispensing table schematic diagram of the present invention；
Fig. 2 is grinding device structural schematic diagram of the present invention；
Fig. 3 is grinding device controller architecture schematic diagram of the present invention；
Fig. 4 is grinding device operation principle schematic diagram of the present invention.
In figure：1 shell, 2 feed inlets, 3 controllers, 31 motor switch, 32 electromagnetic valve switch, 33 temperature adjustment knobs, 4
One shaft, 5 heating plates, 6 solenoid valves, 7 mixing rolls, 8 second discharge ports, 9 second shafts, 10 first discharge ports, 11 partition boards, 12 powder
Broken tooth, 13 motors.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 4 are please referred to Fig.1, a kind of negative electrode active material of lithium battery, material is by nano-grade porous aerogel, crystallization
Carbon, superconduction carbon black, binder Kynoar, lithium alloys and amorphous carbon composition, dispensing percentage are：Nanoporous carbon
Aeroge 5%~10%；Crystalline carbon 40%~60%；Superconduction carbon black 3%~8%；Binder Kynoar 5%~10%；
Lithium alloys 15%~20%；Amorphous carbon 7%~12%.
Nano-grade porous aerogel is using resorcinol and formaldehyde as precursor reagent, and sodium silicate solution is catalyst,
Through Temperature Treatment, solvent replacement, constant pressure and dry, high temperature carbonization, gas activation and be made, and the aperture of nano-grade porous aerogel
For 100~200nm, specific surface area is 2000~3500m2/g, and resistivity is less than or equal to 0.2 Ω cm.
Lithium alloys be the alpha+beta containing two-phase magnesium lithium alloy, and the magnesium lithium alloy of the alpha+beta containing two-phase by Li, Cu, In, Mo, Zr,
The group of Fe, Al and Mg, weight percent meter alloy become：Li：7.0~10.0wt.%；Cu：1.0~2.0wt.%；In：
1.0~3.0wt.%；Mo：0.2~0.4wt.%；Zr：0.25~0.35wt.%；Fe：0.22~0.35wt.%；Al：0.25
~0.42wt.%；Mg surpluses.
Lithium alloys are that the magnesium lithium alloy preparation method of the alpha+beta containing two-phase is：By Li, Cu, In, Mo, Zr, Fe, Al and Mg
It is added in the electric induction furnace of argon gas protection, and uses silicon carbide crucible, sensing heating to 800~900 DEG C of formation alloy solutions,
And it is sufficiently stirred 8~12min or so using electromagnetic agitation effect, alloy liquid is kept the temperature at 700~750 DEG C then and stands 8min
After be cast in waterglass or graphite jig and carry out casting and forming.
Preparation method includes the following steps：
A, by the nano-grade porous aerogel of formula ratio, crystalline carbon, superconduction carbon black, binder Kynoar and amorphous
Carbon uses grinding device grind into powder；
B, the mixture after grinding is screened by the sieve of 60 molybdenums, and underproof raw material is reapposed over and is ground
Secondary grinding is carried out in mill apparatus, until its qualification；
C, qualified mixture is put into blender, and toluene cyclohexanone is added, 20~40min is mixed；
D, mixed liquor is uniformly applied on lithium alloys, negative electrodes for lithium batteries is obtained after dry.
Grinding device includes shell 1, and the upper end of 1 inner cavity of shell is movably installed with first rotating shaft 4, and first rotating shaft 4 is outer
Surface is fixedly connected with crushing tooth 12, and the middle-end of 1 inner cavity of shell is fixedly connected with partition board 11, and the left and right ends at 11 top of partition board
It is embedded with heating plate 5, the middle-end of 11 inner surface of partition board offers the first discharge port 10, and the bottom activity of the first discharge port 10
Solenoid valve 6 is installed, the lower end of 1 inner cavity of shell is movably installed with the second shaft 9, and the outer surface of the second shaft 9 is fixedly connected
There is mixing roll 7, the right end at 1 top of shell is installed with motor 13, and the output shaft of motor 13 passes through belt and first rotating shaft 4
It being sequentially connected, first rotating shaft 4 is sequentially connected by belt and the second shaft 9, and the left end at 1 top of shell offers feed inlet 2, and
The right end at 2 top of feed inlet has been connected through hinge activity cover board, and the upper end in 1 left side of shell is fixedly connected with controller 3, and controls
The outer surface of device 3 processed is fixedly connected sequentially from back to front motor switch 31, electromagnetic valve switch 32 and temperature adjustment knob 33, shell
The bottom in 1 left side of body offers the second discharge port 8, and the inner cavity of the second discharge port 8 is plugged with snap-gauge.
In use, negative electrode active material is by nano-grade porous aerogel, crystalline carbon, superconduction carbon black, binder polyvinylidene fluoride
Alkene, lithium alloys and amorphous carbon composition, can be improved the intensity and thermal conductivity of negative electrode active material entirety, while its preparation side
Method is simple, and outfit is easy to get, and reduces the production cost of negative electrode active material.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of negative electrode active material of lithium battery, it is characterised in that：Its material by nano-grade porous aerogel, crystalline carbon,
Superconduction carbon black, binder Kynoar, lithium alloys and amorphous carbon composition, dispensing percentage are：Nanoporous carbon gas
Gel 5%~10%；Crystalline carbon 40%~60%；Superconduction carbon black 3%~8%；Binder Kynoar 5%~10%；Contain
Lithium alloy 15%~20%；Amorphous carbon 7%~12%.
2. a kind of negative electrode active material of lithium battery according to claim 1, it is characterised in that：The nanoporous carbon
Aeroge is using resorcinol and formaldehyde as precursor reagent, and sodium silicate solution is catalyst, is replaced through Temperature Treatment, solvent
Change, constant pressure and dry, high temperature carbonization, gas activation and be made, and the aperture of nano-grade porous aerogel be 100~200nm, compare table
Area is 2000~3500m2/g, and resistivity is less than or equal to 0.2 Ω cm.
3. a kind of negative electrode active material of lithium battery according to claim 1, it is characterised in that：The lithium alloys are
The magnesium lithium alloy of the alpha+beta containing two-phase, and the magnesium lithium alloy of the alpha+beta containing two-phase is by Li, Cu, In, Mo, Zr, Fe, Al and Mg, weight hundred
The group than meter alloy is divided to become：Li：7.0~10.0wt.%；Cu：1.0~2.0wt.%；In：1.0~3.0wt.%；Mo：0.2
~0.4wt.%；Zr：0.25~0.35wt.%；Fe：0.22~0.35wt.%；Al：0.25~0.42wt.%；Mg surpluses.
4. a kind of negative electrode active material of lithium battery according to claim 3, it is characterised in that：Lithium alloys are containing double
The magnesium lithium alloy preparation method of phase alpha+beta is：Li, Cu, In, Mo, Zr, Fe, Al and Mg are added to the induced electricity of argon gas protection
In stove, and silicon carbide crucible is used, sensing heating to 800~900 DEG C of formation alloy solutions, and it is abundant using electromagnetic agitation effect
8~12min or so is stirred, alloy liquid is kept the temperature at 700~750 DEG C then and is cast to waterglass or graphite after standing 8min
Casting and forming is carried out in mold.
5. a kind of preparation method of the negative electrode active material of lithium battery according to any one of claims 1 to 4, feature
It is：Preparation method includes the following steps：
A, the nano-grade porous aerogel of formula ratio, crystalline carbon, superconduction carbon black, binder Kynoar and amorphous carbon are made
With grinding device grind into powder；
B, the mixture after grinding is screened by the sieve of 60 molybdenums, and underproof raw material is reapposed over grinding dress
The interior secondary grinding of progress is set, until its qualification；
C, qualified mixture is put into blender, and toluene cyclohexanone is added, 20~40min is mixed；
D, mixed liquor is uniformly applied on lithium alloys, negative electrodes for lithium batteries is obtained after dry.
6. a kind of preparation method of the negative electrode active material of lithium battery according to claim 5, it is characterised in that：It is described
Grinding device includes shell (1), and the upper end of shell (1) inner cavity is movably installed with first rotating shaft (4), and first rotating shaft (4) is outer
Surface is fixedly connected with crushing tooth (12), and the middle-end of shell (1) inner cavity is fixedly connected with partition board (11), and at the top of partition board (11)
Left and right ends are embedded with heating plate (5), and the middle-end of partition board (11) inner surface offers the first discharge port (10), and the first discharging
The bottom of mouth (10) is movably installed with solenoid valve (6), and the lower end of shell (1) inner cavity is movably installed with the second shaft (9), and second
The outer surface of shaft (9) is fixedly connected with mixing roll (7), and the right end at the top of shell (1) is installed with motor (13), and motor
(13) output shaft is sequentially connected by belt and first rotating shaft (4), and first rotating shaft (4) is passed by belt and the second shaft (9)
Dynamic connection.
7. a kind of preparation method of the negative electrode active material of lithium battery according to claim 6, it is characterised in that：It is described
Left end at the top of shell (1) offers feed inlet (2), and the right end at the top of feed inlet (2) has been connected through hinge activity cover board,
Upper end on the left of shell (1) is fixedly connected with controller (3), and the outer surface of controller (3) is fixedly connected sequentially from back to front
There are motor switch (31), electromagnetic valve switch (32) and temperature adjustment knob (33), the bottom on the left of shell (1) to offer second and go out
Material mouth (8), and the inner cavity of the second discharge port (8) is plugged with snap-gauge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810643170.XA CN108807922A (en) | 2018-06-21 | 2018-06-21 | A kind of negative electrode active material of lithium battery and preparation method thereof |
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| CN201810643170.XA CN108807922A (en) | 2018-06-21 | 2018-06-21 | A kind of negative electrode active material of lithium battery and preparation method thereof |
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Application publication date: 20181113 |