CN106803574B - Anode material for lithium-ion batteries and its preparation method and application - Google Patents
Anode material for lithium-ion batteries and its preparation method and application Download PDFInfo
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- CN106803574B CN106803574B CN201611217375.9A CN201611217375A CN106803574B CN 106803574 B CN106803574 B CN 106803574B CN 201611217375 A CN201611217375 A CN 201611217375A CN 106803574 B CN106803574 B CN 106803574B
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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
- H01M4/366—Composites as layered products
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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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- 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
- H01M4/58—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
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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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
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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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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 present invention relates to anode material for lithium-ion batteries and its preparation method and application.The positive electrode is LMP/PEG-PTh composite material, and the mass percent of PTh is 1-15% in LMP/PEG-PTh composite material.Preparation method are as follows: using LMP material as core, adhere to PEG on LMP core surface, obtain LMP/PEG composite material；Conducting polymer PTh is deposited in LMP/PEG composite material surface again, obtains PTh/PEG-PTh composite material.PEG of the present invention not only can form clad on the surface LMP, inhibit the dissolution of manganese, and be a kind of good solid polymer electrolyte matrix, can promote the transmission of lithium ion.And PTh clad has high conductance, can reduce the charge transfer resistance between the interface LMP, improves the surface migration rate of lithium ion and electronics, and then improves the high rate performance of electrode.
Description
Technical field
The invention belongs to field of lithium ion battery, are related to anode material for lithium-ion batteries and preparation method thereof and in lithium ion
Application in battery.
Background technique
Power lithium-ion battery has many advantages, such as that the service life is long, energy density is big and voltage platform is high, is New Energy Industry hair
One important directions of exhibition.Currently, the common positive electrode of lithium ion is mainly lithium transition-metal oxide, including LiCoO2、
LiNi1/3Col/3Mn1/3O2, spinel structure LiMn2O4And polyanion class positive electrode such as olivine structural
LiFePO4。
LiMnPO4(LMP) olivine-type structure, rhombic system are also belonged to, its special construction makes it have excellent heat
Mechanics and dynamic stability.With the high potential of 4.1V when as positive electrode, the stabilization electrochemistry in existing electrolyte
Window, theoretical specific capacity 171mAh/g.Since it compares LiFePO4The high 0.7V of current potential, according to similar specific discharge capacity and compacting
Density measuring and calculating, the energy density of LMP battery is compared with LiFePO4About 20% is improved, and raw material sources are extensive, before there is wide development
Scape.But LMP material also has the defect of its own, maximum problem is that electron conduction and ionic mobility are low.Also
One problem is exactly there are problems that manganese dissolution, LMP and electrolyte contacts, manganese ion are readily dissolved in electrolyte as LiMn2O4
In, lead to LMP structure collapses, capacity attenuation is fast, and high rate performance and cycle performance are undesirable.
A common method for improving LMP material conductivity in the prior art is to carry out carbon coating, as Chinese invention is special
Sharp (publication number: CN102412398A) is by using transistion metal compound as catalyst and doped chemical to the hydrocarbon of pyrolysis
Gas is catalyzed, and the compound lithium manganese phosphate material of in-situ carbon nanotube is prepared, and it is multiple to obtain the high carbon nanotube/LMP of conductivity
Condensation material.The technology is more open between particle the problem is that there is gap between carbon particle and LMP particle, and LMP and carbon
It is easily separated from, causes the electric conductivity of carbon to play bad.It, can be to it in the prior art in order to inhibit the dissolution of manganese in LMP material
Another material is coated, prevents its LMP from directly contacting with electrolyte, such as Chinese invention patent (publication number: CN103794789A)
It is prepared for a kind of lithium ion battery ferrous phosphate manganese lithium nucleocapsid positive electrode, wherein stratum nucleare is lithium manganese phosphate, and shell is ferric phosphate
Lithium, the composite material chemical property are greatly improved.But LiFePO4 cladding is carried out, the electric conductivity of material does not obtain
Very big improvement.
Thus, researchers start sight to turn to conducting polymer.Conducting polymer preparation is easy, electric conductivity is strong,
And there is electro-chemical activity, inorganic material and conducting polymer, which are carried out the compound research for preparing composite material, becomes new heat
Point.As Chinese invention patent (publication number: CN104956523A) discloses a kind of use of conducting polymer in battery set electrode
On the way, and specifically disclose a kind of cathode i.e. preparation method of positive electrode, include in composition a) conducting polymer match
Close object PEDOT/PSS, b) at least one lithium ion compound, preferably LiFePO4, c) at least one solvent composition.
PEDOT/PSS electric conductivity with higher, makees conductive agent in the cathode.But PEDOT/PSS exists in granular form, if lithium
Ion chemistry object is that LMP then cannot coat well it.For another example Chinese invention patent (publication number: CN103606678A)
A kind of preparation method of lithium ion battery anode material manganese lithium phosphate-conduction polymer is disclosed, specifically: preparation pure phase phosphoric acid
Manganese lithium, then by itself and organic carbon source compound ball milling mixing, lithium manganese phosphate-conduction poly is then obtained using Low Temperature Heat Treatment
Object.But due in the patent conducting polymer be heat-treated, improve energy requirements and production cost.
Summary of the invention
The purpose of the present invention is aiming at the problems existing in the prior art, propose one kind to have good high rate performance and follow
The anode material for lithium-ion batteries of ring performance.
Object of the invention can be realized by the following technical scheme: anode material for lithium-ion batteries, the positive electrode
For LMP/PEG-PTh composite material.
Wherein, LMP/PEG-PTh composite material is using LMP as core, and redeposition PTh is made after PEG is adhered on LMP core surface.
In LMP/PEG-PTh composite material of the invention, PEG can form clad on the surface LMP, inhibit the molten of manganese
Solution.In addition, PEG is a kind of good solid polymer electrolyte matrix, the transmission of lithium ion can be promoted.
PTh (conductive polythiophene) has good environmental stability, easily prepared and mix because having the structure of similar aromatic rings
There is very high electric conductivity after miscellaneous.There is better chemical stability compared with other conjugated polymers such as polyaniline, polypyrrole,
Wherein polythiophene/inorganic nanoparticles composite material can show semiconductor to metallic conductor according to the difference of doping level
Characteristic, have very high potential using value.The PTh clad that the present invention is formed in LMP/PEG composite material surface have compared with
High conductivity can reduce the charge transfer resistance between the interface LMP, improve the surface migration rate of lithium ion and electronics, in turn
Improve the high rate performance of electrode.On the other hand, PTh can be further reduced the contact area of LMP and electrolyte, and manganese is inhibited to exist
Dissolution in electrolyte improves the cycle performance of LMP.In addition, PTh is a kind of supercapacitor fake capacitance material, itself can be with
Forming surface electric double layer has certain charge capacity, and the capacity of composite material can be improved.
In above-mentioned anode material for lithium-ion batteries, the mass percent of PTh in the LMP/PEG-PTh composite material
For 1-15%, the mass percent of LMP/PEG is 85-99%.It is preferred that are as follows: the quality hundred of PTh in LMP/PEG-PTh composite material
Divide than being 5-15%, the mass percent of LMP/PEG is 85-95%.
In above-mentioned anode material for lithium-ion batteries, PEG accounts for the mass percent of LMP/PEG and is in the LMP/PEG
1-5%.
In above-mentioned anode material for lithium-ion batteries, the LMP is nanoscale, partial size 50-250nm.
Second object of the present invention is to provide the preparation method of above-mentioned anode material for lithium-ion batteries, the preparation side
Method the following steps are included:
Using LMP material as core, adheres to PEG on LMP core surface, obtain LMP/PEG composite material；
Conducting polymer PTh is deposited in LMP/PEG composite material surface, obtains PTh/PEG-PTh composite material.
Preparation method of the present invention is simple, and the thickness of PTh clad is adjustable.
Preferably, LMP is made by following methods: lithium salts, manganese salt, phosphate and organic acid are pressed Li:Mn:PO4: H
Mole metering is scattered in solvent than 1-3:1:1:1, is passed through ball milling, drying, is ground LMP presoma is made.Again by LMP precursor
It is baked in protective atmosphere to obtain LMP.
Preferably, the temperature of the baking is 500-650 DEG C, time 8-15h.
In the preparation method of above-mentioned anode material for lithium-ion batteries, the specific preparation of the LMP/PEG composite material
Method are as follows:
LMP is placed in the aqueous solution containing surfactant, obtains LMP/PEG composite material, the surface after dry
Activating agent has PEG chain.
In the preparation method of above-mentioned anode material for lithium-ion batteries, the surfactant is polyethylene glycol octyl benzene
Base ether.Triton X-100 (Triton X-100) is a kind of nonionic surface active agent, contains polyethylene glycol
(PEG) chain.
In the preparation method of above-mentioned anode material for lithium-ion batteries, the LMP/PEG composite material surface deposition is led
The method of electric polymer PTh is in situ chemical oxidation method.Specifically:
LMP/PEG composite material and deionized water are added in the reactor containing chloroform, is passed through protective gas and carries out
Mechanical stirring is then injected into thiophene monomer, after evenly mixing, oxidant is added, and carries out mistake after magnetic agitation polymerization in a water bath
Filter obtains powder, and powder is washed, is dried to obtain LMP/PEG-PTh composite material.
Preferably, the oxidant is FeCl3, FeCl3Molar ratio with thiophene monomer is (3-5): 1.
Preferably, the deionized water and the molar ratio of oxidant are (2.5-4.3): 1, further preferably (2.8-
3.5): 1.Deionization is as auxiliary oxidizing agent in the present invention, when deionized water and the molar ratio of oxidant are (2.8-4.3): 1
When, oxidant FeCl3Lewis acidity be suitable for being effectively performed oxidation aromatisation effect.When deionized water and oxidant
Molar ratio be (2.5-3.5): when 1, then resulting product conductivity highest.In addition, the morphosis of the powder of PTh also with
Deionized water is related with the molar ratio of oxidant, and it is porous that PTh is made when the molar ratio of deionized water and oxidant is 2.8
Shape.To sum up, the present invention controls deionized water and the molar ratio of oxidant within the above range.
Preferably, the temperature of the water-bath is 0-90 DEG C, polymerization time 10-36h.
Third object of the present invention is to provide lithium ion made of a kind of above-mentioned anode material for lithium-ion batteries of application
Battery.
Compared with prior art, the method has the advantages that
1. in LMP/PEG-PTh composite material of the invention, PEG not only can form clad on the surface LMP, inhibit manganese
Dissolution, and be a kind of good polymer dielectric, the ether oxygen atom electrostatic on lithium ion and PEG can be passed through and coordinate to make
With the transmission for promoting lithium ion.
2. the PTh clad in LMP/PEG-PTh composite material of the present invention has high conductance, LMP circle can be reduced
Charge transfer resistance between face, improves the surface migration rate of lithium ion and electronics, and then improves the high rate performance of electrode.
3. the contact surface that the PTh in LMP/PEG-PTh composite material of the present invention can be further reduced LMP and electrolyte
Product inhibits the dissolution of manganese in the electrolytic solution, improves the cycle performance of LMP.
4. preparation method of the present invention is simple, the thickness of PTh clad is adjustable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of LMP/PEG-PTh composite material of the present invention；
In figure: 1, LMP；2,PEG；3,PTh.
Specific embodiment
The following is specific embodiments of the present invention, and is described with reference to the drawings and further retouches to technical solution of the present invention work
It states, however, the present invention is not limited to these examples.
As shown in Figure 1, LMP/PEG-PTh composite material of the invention is attached with PEG chain using LMP as core 1 outside LMP core 1
2, PTh clad 3 is wrapped in PEG chain 2.The network-like distribution of PEG chain 2, makes it be conducive to electronics and Ion transfer.
Embodiment 1:
Lithium hydroxide, manganese carbonate, ammonium phosphate, tartaric acid are pressed into Li:Mn:PO4: H moles of metering ratio is that 1:1:1:1 is mixed,
Ball milling 15h is carried out in alcohol solvent, obtains the slurry that solid content is 65%.Then dry at 90 DEG C, 400 mesh are crossed in grinding
Sieve obtains LMP presoma.Precursor is baked at 650 DEG C in the tube furnace of nitrogen atmosphere again, 8h is kept, obtains
LMP, partial size 100-200nm.
It weighs 1g LMP to be placed in the aqueous solution of the Triton X-100 surfactant containing 0.01g, by repeatedly surpassing
Sound stirring, makes it be uniformly dispersed, at room temperature evaporation water, grinds, obtains LMP/PEG composite material.
LMP/PEG composite material and deionized water are added in the three-necked flask containing chloroform, is passed through Ar as protection gas
Body simultaneously carries out mechanical stirring, after 1h, injects thiophene monomer dropwise, after evenly mixing, oxidant FeCl is added3(deionized water and
FeCl3Molar ratio be 2.5:1, thiophene monomer and FeCl3Molar ratio is 1:4), magnetic agitation polymerization is carried out in 0 DEG C of water-bath
Powder is obtained by filtration in 12h.Be by powder distilled water, absolute alcohol centrifuge washing to upper liquid again it is colourless, it is dry in 80 DEG C of vacuum
48h is done in dry case, grinding obtains the LMP/PEG-PTh composite material of structure as shown in Figure 1.PTh content is in composite material
The content of 3.8wt%, LMP/PEG are 96.2wt%, and the content of PEG is 1% in LMP/PEG.
Embodiment 2:
Lithium hydroxide, manganese carbonate, ammonium phosphate, tartaric acid are pressed into Li:Mn:PO4: H moles of metering for 1.5:1:1:1 than mixing
It closes, ball milling 15h is carried out in alcohol solvent, obtain the slurry that solid content is 65%.Then dry at 90 DEG C, grinding crosses 400
Mesh screen obtains LMP presoma.Precursor is baked at 600 DEG C in the tube furnace of nitrogen atmosphere again, 8h is kept, obtains
To LMP, partial size 100-250nm.
It weighs 1g LMP to be placed in the aqueous solution of the Triton X-100 surfactant containing 0.015g, by repeatedly surpassing
Sound stirring, makes it be uniformly dispersed, at room temperature evaporation water, grinds, obtains LMP/PEG composite material.
LMP/PEG composite material and deionized water are added in the three-necked flask containing chloroform, is passed through Ar as protection gas
Body simultaneously carries out mechanical stirring, after 1h, injects thiophene monomer dropwise, after evenly mixing, oxidant FeCl is added3(deionized water and
FeCl3Molar ratio be 2.8:1, thiophene monomer and FeCl3Molar ratio is 1:4), magnetic agitation polymerization is carried out in 20 DEG C of water-baths
Powder is obtained by filtration in 18h.Be by powder distilled water, absolute alcohol centrifuge washing to upper liquid again it is colourless, it is dry in 80 DEG C of vacuum
48h is done in dry case, grinding obtains the LMP/PEG-PTh composite material of structure as shown in Figure 1.PTh content is in composite material
The content of 7.5wt%, LMP/PEG are 92.5wt%, and the content of PEG is 1.5% in LMP/PEG.
Embodiment 3:
Lithium hydroxide, manganese carbonate, ammonium phosphate, tartaric acid are pressed into Li:Mn:PO4: H moles of metering ratio is that 2:1:1:1 is mixed,
Ball milling 20h is carried out in acetone/water solvent, obtains the slurry that solid content is 75%.Then dry at 90 DEG C, grinding crosses 400
Mesh screen obtains LMP presoma.Precursor is baked at 500 DEG C in the tube furnace of nitrogen atmosphere again, 15h is kept, obtains
To LMP, partial size 50-150nm.
It weighs 1g LMP to be placed in the aqueous solution of the Triton X-100 surfactant containing 0.02g, by repeatedly surpassing
Sound stirring, makes it be uniformly dispersed, at room temperature evaporation water, grinds, obtains LMP/PEG composite material.
LMP/PEG composite material and deionized water are added in the three-necked flask containing chloroform, is passed through Ar as protection gas
Body simultaneously carries out mechanical stirring, after 1h, injects thiophene monomer dropwise, after evenly mixing, oxidant FeCl is added3(deionized water and
FeCl3Molar ratio be 3:1, thiophene monomer and FeCl3Molar ratio is 1:4), magnetic agitation polymerization is carried out in 20 DEG C of water-baths
Powder is obtained by filtration in 18h.Be by powder distilled water, absolute alcohol centrifuge washing to upper liquid again it is colourless, it is dry in 80 DEG C of vacuum
48h is done in dry case, grinding obtains the LMP/PEG-PTh composite material of structure as shown in Figure 1.PTh content is in composite material
The content of 11.5wt%, LMP/PEG are 88.5wt%, and the content of PEG is 3% in LMP/PEG.
In above-described embodiment and its alternative, the mass percent of PTh can be in LMP/PEG-PTh composite material
For 1wt%, 1.5wt%, 2wt%, 2.5wt%, 3wt%, 3.5wt%, 4wt%, 4.5wt%, 5wt%, 5.5wt%,
6wt%, 6.5wt%, 7wt%, 8wt%, 8.5wt%, 9wt%, 9.5wt%, 10wt%, 10.5wt%, 11wt%,
12wt%, 12.5wt%, 13wt%, 13.5wt%, 14wt%, 14.5wt%, 15wt%.
In above-described embodiment and its alternative, in LMP/PEG the mass percent of PEG be 2wt%, 2.5wt%,
3wt%, 3.5wt%, 4wt%, 4.5wt%, 5wt%.
In above-described embodiment and its alternative, the temperature of baking can also for 510 DEG C, 520 DEG C, 530 DEG C, 540 DEG C,
550 DEG C, 560 DEG C, 570 DEG C, 580 DEG C, 590 DEG C, 610 DEG C, 620 DEG C, 630 DEG C, 640 DEG C, the time can also for 9h, 10h, 11h,
12h、13h、14h。
In above-described embodiment and its alternative, deionized water and FeCl3Molar ratio can also be 2.6:1,2.7:
1、2.9:1、3.1:1、3.2:1、3.3:1、3.4:1、3.5:1、3.6:1、3.7:1、3.8:1、3.9:1、4:1、4.1:1、4.2:
1、4.3:1。
In above-described embodiment and its alternative, thiophene monomer and FeCl3Molar ratio can also for 1:3,1:3.1,
1:3.2、1:3.3、1:3.4、1:3.5、1:3.6、1:3.7、1:3.8、1:3.9、1:4.1、1:4.2、1:4.3、1:4.4、1:
4.5、1:4.6、1:4.7、1:4.8、1:4.9、1:5。
In above-described embodiment and its alternative, bath temperature can also be 5 DEG C, 10 DEG C, 15 DEG C, 25 DEG C, 30 DEG C, 35
DEG C, 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C, 60 DEG C, 65 DEG C, 70 DEG C, 75 DEG C, 80 DEG C, 85 DEG C, 90 DEG C, polymerization time can also be
10h、13h、15h、16h、20h、22h、25h、28h、30h、35h、36h。
Application Example 1-3:
Just using anode material for lithium-ion batteries LMP/PEG-PTh composite material made from above-described embodiment 1-3 as battery
Pole active material preparation anode, is made with metal lithium sheet to electrode, 1molL-1LiPF6/ EC+DMC+EMC (volume ratio: 1:1:1)
For electrolyte, polypropylene material is diaphragm, and 2032 button cells are assembled in the glove box of argon atmosphere.Concrete operation step is such as
Under:
Positive electrode is weighed by 95wt%LMP/PEG-PTh, 2.5wt% acetylene black, 2.5wt%PVDF, is dispersion with NMP
Agent carries out ball milling, anode sizing agent is made.Anode sizing agent is coated uniformly in aluminum foil current collector, drying, tabletting, punching are made
Positive plate is made with metal lithium sheet to electrode, with 1molL-1LiPF6/ EC+DMC+EMC (volume ratio: 1:1:1) is electrolyte, with
Polypropylene material is diaphragm, and 2032 button cells are assembled in the glove box of argon atmosphere.It is surveyed using LAND CT2001A battery
Test system carries out charge-discharge test with the constant multiplying power of 0.1C and constant voltage, between 2.2~4.4V of charging/discharging voltage range.Knot
Fruit are as follows:
LMP/PEG-PTh composite material anode specific discharge capacity at 0.1C reaches 164.5mAh/g in Application Example 1
(it is based on active material quality, capacity still has 137.9mAh/g under 5C, and testing conservation rate after it is recycled 1000 times under 2C multiplying power is
93.7%.
LMP/PEG-PTh composite material anode specific discharge capacity at 0.1C reaches 167.1mAh/g in Application Example 2
(it is based on active material quality, capacity still has 144.4mAh/g under 5C, and testing conservation rate after it is recycled 1000 times under 2C multiplying power is
95.4%.
LMP/PEG-PTh composite material anode specific discharge capacity at 0.1C reaches 163.2mAh/g in Application Example 3
(it is based on active material quality, capacity still has 135.7mAh/g under 5C, and testing conservation rate after it is recycled 1000 times under 2C multiplying power is
92.8%.
In view of the numerous embodiments of the scheme of the present invention, each embodiment experimental data is huge numerous, is not suitable for arranging one by one herein
Explanation is lifted, but the content verified required for each embodiment and obtained final conclusion are close.So herein not to each reality
The verifying content for applying example is explained one by one, and only illustrates the present patent application using embodiment 1-3 and Application Example 1-3 as representative
Excellent place.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can do various modifications or supplement or is substituted in a similar manner to described specific embodiment, but simultaneously
Spirit or beyond the scope defined by the appended claims of the invention is not deviated by.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. anode material for lithium-ion batteries, which is characterized in that the positive electrode is LMP/PEG-PTh composite material；
The preparation method of the positive electrode the following steps are included:
Using LMP material as core, adheres to PEG on LMP core surface, obtain LMP/PEG composite material；
Conducting polymer PTh is deposited in LMP/PEG composite material surface, obtains LMP/PEG-PTh composite material.
2. anode material for lithium-ion batteries according to claim 1, which is characterized in that the LMP/PEG-PTh composite wood
The mass percent of PTh is 1-15% in material, and the mass percent of LMP/PEG is 85-99%.
3. anode material for lithium-ion batteries according to claim 2, which is characterized in that PEG accounts for LMP/ in the LMP/PEG
The mass percent of PEG is 1-5%.
4. anode material for lithium-ion batteries according to claim 3, which is characterized in that the LMP is nanoscale, and partial size is
50-250nm。
5. anode material for lithium-ion batteries according to claim 1, which is characterized in that the LMP/PEG composite material
It is specific the preparation method comprises the following steps:
LMP is placed in the aqueous solution containing surfactant, obtains LMP/PEG composite material, the surface-active after dry
Agent has PEG chain.
6. anode material for lithium-ion batteries according to claim 5, which is characterized in that the surfactant is poly- second two
Alcohol octyl phenyl ether.
7. anode material for lithium-ion batteries according to claim 1, which is characterized in that the LMP/PEG composite material table
The method that face deposits conducting polymer PTh is in situ chemical oxidation method.
8. a kind of lithium ion battery of application anode material for lithium-ion batteries as described in claim 1-4 is any.
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| KR102315399B1 (en) * | 2017-09-28 | 2021-10-20 | 주식회사 엘지화학 | Polymer material for lithium secondary battery and manufacturing methods thereof |
| CN107482223B (en) * | 2017-09-29 | 2021-06-08 | 清华大学 | Lithium ion battery electrode material composition, lithium ion battery and preparation method of electrode slurry of lithium ion battery |
| CN108711613B (en) * | 2018-05-18 | 2020-10-30 | 中南大学 | Polyaniline/polyethylene glycol co-coated composite ternary cathode material and preparation and application thereof |
| CN109713149B (en) * | 2018-12-25 | 2020-07-07 | 浙江大学 | High-magnification stretchable electroluminescent device and preparation method thereof |
| CN112563504A (en) * | 2020-12-09 | 2021-03-26 | 北京理工大学重庆创新中心 | Method for regulating and controlling surface transmission efficiency of lithium battery anode material and obtained anode material |
| CN114899368A (en) * | 2022-03-28 | 2022-08-12 | 佛山市德方纳米科技有限公司 | Composite cathode material and preparation method and application thereof |
| EP4336593A1 (en) * | 2022-04-01 | 2024-03-13 | Contemporary Amperex Technology Co., Limited | Positive electrode active material, preparation method therefor, positive electrode plate comprising same, secondary battery, and electric device |
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| CN104956523A (en) * | 2012-11-26 | 2015-09-30 | 赫劳斯贵金属有限两和公司 | Use of conductive polymers in battery electrodes |
| CN104900856A (en) * | 2015-04-29 | 2015-09-09 | 中南大学 | Nanometer sulfur-based positive electrode composite material for lithium sulfur batteries, and preparation method thereof |
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