CN106803574A - 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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- CN106803574A CN106803574A CN201611217375.9A CN201611217375A CN106803574A CN 106803574 A CN106803574 A CN 106803574A CN 201611217375 A CN201611217375 A CN 201611217375A CN 106803574 A CN106803574 A CN 106803574A
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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 composites, and the mass percent of PTh is 1 15% in LMP/PEG PTh composites.Its preparation method is：With LMP materials as core, in LMP core surface attachment PEG, LMP/PEG composites are obtained；Conducting polymer PTh is deposited in LMP/PEG composite material surfaces again, PTh/PEG PTh composites are obtained.PEG of the present invention not only can form clad on LMP surfaces, suppress the dissolving of manganese, and be a kind of good solid polymer electrolyte matrix, can promote the transmission of lithium ion.And PTh clads have high conductance, the charge transfer resistance between LMP interfaces can be reduced, improve the surface migration speed of lithium ion and electronics, and then improve the high rate performance of electrode.
Description
Technical field
The invention belongs to field of lithium ion battery, it is related to anode material for lithium-ion batteries and preparation method thereof and in lithium ion
Application in battery.
Background technology
Power lithium-ion battery has the advantages that long lifespan, energy density are big and voltage platform is high, is New Energy Industry hair
One important directions of exhibition.At present, the conventional 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 is fallen within, rhombic system, its special construction makes it have excellent heat
Mechanics and dynamic stability.There is the high potential of 4.1V, the stable electrochemistry in existing electrolyte during as positive electrode
Window, theoretical specific capacity is 171mAh/g.Because it compares LiFePO4Current potential 0.7V high, according to similar specific discharge capacity and compacting
Density is calculated, and the energy density of LMP batteries is compared with LiFePO4About 20% is improved, and raw material sources are extensively, before wide development
Scape.But LMP materials also have the defect of its own, maximum of which problem is that electron conduction and ionic mobility are low.Also
One problem is exactly the presence of manganese dissolving, LMP and electrolyte contacts as LiMn2O4, and manganese ion is readily dissolved in electrolyte
In, causing LMP structure collapses, capacity attenuation is fast, and its high rate performance and cycle performance are undesirable.
A conventional method for improving LMP material conductivities in the prior art is to carry out carbon coating, and such as Chinese invention is special
Sharp (publication number：CN102412398A) by hydrocarbon to what is be pyrolyzed as catalyst and doped chemical using transistion metal compound
Gas is catalyzed, and prepares the compound lithium manganese phosphate material of in-situ carbon nanotube, obtains electrical conductivity CNT/LMP high multiple
Condensation material.The problem that the technology is present is that have gap between carbon particle and LMP particles, more open between particle, and LMP and carbon
It is easily separated from, causes the electric conductivity of carbon to play not good.In the prior art in order to suppress the dissolving of manganese in LMP materials, can be to it
Another material of cladding, prevents its LMP and electrolyte directly contact, such as Chinese invention patent (publication number：CN103794789A)
A kind of lithium ion battery ferrous phosphate manganese lithium nucleocapsid positive electrode is prepared for, wherein stratum nucleare is lithium manganese phosphate, and shell is ferric phosphate
Lithium, the composite chemical property is greatly improved.But LiFePO4 cladding is carried out, the electric conductivity of material is not obtained
Very big improvement.
Thus, researchers start sight to turn to conducting polymer.Conducting polymer prepares easy, electric conductivity by force,
And with electro-chemical activity, inorganic material and conducting polymer are carried out into the compound research for preparing composite becomes new heat
Point.Such as Chinese invention patent (publication number：CN104956523A a kind of use of conducting polymer in battery set electrode) is disclosed
On the way, and a kind of negative electrode i.e. preparation method of positive electrode is specifically disclosed, composition includes that a) conducting polymer is matched somebody with somebody
Compound PEDOT/PSS, b) at least one lithium ion compound, preferably LiFePO4, the c) composition of at least one solvent.
PEDOT/PSS has electric conductivity higher, and conductive agent is made in the cathode.But PEDOT/PSS exists in granular form, if lithium
Ion chemistry thing then can not well be coated for LMP to it.And for 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, specially：Prepare 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
Thing.But, because conducting polymer needs to be heat-treated in the patent, improve energy requirements and production cost.
The content of the invention
The purpose of the present invention is directed to problems of the prior art, it is proposed that one kind has good high rate performance and follows
The anode material for lithium-ion batteries of ring performance.
The purpose of the present invention can be realized by following technical proposal：Anode material for lithium-ion batteries, the positive electrode
It is LMP/PEG-PTh composites.
Wherein, with LMP as core, redeposition PTh is obtained LMP/PEG-PTh composites after LMP core surface attachments PEG.
In LMP/PEG-PTh composites of the invention, PEG can form clad on LMP surfaces, suppress the molten of manganese
Solution.Additionally, 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 of the structure with similar aromatic rings
There is electric conductivity very high after miscellaneous.There is more preferable chemical stability compared with other conjugated polymers such as polyaniline, polypyrrole,
Wherein polythiophene/inorganic nanoparticles composite, according to the difference of doping level, can show semiconductor to metallic conductor
Characteristic, have potential using value very high.The present invention LMP/PEG composite material surfaces formed PTh clads have compared with
High conductivity, can reduce the charge transfer resistance between LMP interfaces, improve the surface migration speed of lithium ion and electronics, and then
Improve the high rate performance of electrode.On the other hand, PTh can further reduce the contact area of LMP and electrolyte, suppress manganese and exist
Dissolving in electrolyte, improves the cycle performance of LMP.Additionally, PTh is a kind of ultracapacitor fake capacitance material, itself can be with
Forming surface electric double layer has certain charge capacity, can improve the capacity of composite.
In above-mentioned anode material for lithium-ion batteries, the mass percent of PTh in the LMP/PEG-PTh composites
It is 1-15%, the mass percent of LMP/PEG is 85-99%.Preferably：The quality hundred of PTh in LMP/PEG-PTh composites
Divide than being 5-15%, the mass percent of LMP/PEG is 85-95%.
In above-mentioned anode material for lithium-ion batteries, the mass percent that PEG accounts for LMP/PEG in the LMP/PEG is
1-5%.
In above-mentioned anode material for lithium-ion batteries, the LMP is nanoscale, and particle diameter is 50-250nm.
Second object of the present invention is the preparation method for providing above-mentioned anode material for lithium-ion batteries, the preparation side
Method is comprised the following steps：
With LMP materials as core, in LMP core surface attachment PEG, LMP/PEG composites are obtained；
Conducting polymer PTh is deposited in LMP/PEG composite material surfaces, PTh/PEG-PTh composites are obtained.
Preparation method of the present invention is simple, and the thickness of PTh clads can be adjusted.
Preferably, LMP is obtained by following methods：Lithium salts, manganese salt, phosphate and organic acid are pressed into Li：Mn：PO4：H
1-3 is compared in mole metering：1：1：1 is scattered in solvent, and LMP presomas are obtained by ball milling, drying, grinding.Again by LMP precursors
It is baked in protective atmosphere to obtain LMP.
Preferably, the temperature of the baking is 500-650 DEG C, the time is 8-15h.
In the preparation method of above-mentioned anode material for lithium-ion batteries, the specific preparation of the LMP/PEG composites
Method is：
LMP is placed in the aqueous solution containing surfactant, LMP/PEG composites, the surface are obtained after drying
Activating agent has PEG chains.
In the preparation method of above-mentioned anode material for lithium-ion batteries, the surfactant is polyethylene glycol octyl group 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 surfaces deposition is led
The method of electric polymer PTh is in situ chemical oxidation method.Specially：
LMP/PEG composites and deionized water are added in the reactor containing chloroform, protective gas is passed through and is carried out
Mechanical agitation, is then injected into thiophene monomer, after uniform mixing, adds oxidant, and mistake after magnetic agitation polymerization is carried out in a water bath
Filter obtains powder, and powder is scrubbed, be dried to obtain LMP/PEG-PTh composites.
Preferably, the oxidant is FeCl3, FeCl3It is (3-5) with the mol ratio of thiophene monomer：1.
Preferably, the mol ratio of the deionized water and oxidant is (2.5-4.3)：1, more preferably (2.8-
3.5)：1.Deionization is used as cooxidant in the present invention, when the mol ratio of deionized water and oxidant is (2.8-4.3)：1
When, oxidant is FeCl3Lewis acidity be suitable for effectively carrying out oxidation aromatisation effect.When deionized water and oxidant
Mol ratio be (2.5-3.5)：When 1, then gained product conductance highest.In addition, the morphosis of the powder of PTh also with
Deionized water is relevant with the mol ratio of oxidant, and it is porous that PTh is made when the mol ratio of deionized water and oxidant is 2.8
Shape.To sum up, the present invention controls within the above range the mol ratio of deionized water and oxidant.
Preferably, the temperature of the water-bath is 0-90 DEG C, polymerization time is 10-36h.
Third object of the present invention is to provide a kind of lithium ion for applying above-mentioned anode material for lithium-ion batteries to be made
Battery.
Compared with prior art, the present invention has following advantage：
1. in LMP/PEG-PTh composites of the invention, PEG not only can form clad on LMP surfaces, suppress manganese
Dissolving, and be a kind of good polymer dielectric, can coordinate to make by the ether oxygen atom electrostatic on lithium ion and PEG
With the transmission for promoting lithium ion.
2. the PTh clads in LMP/PEG-PTh composites of the present invention have high conductance, can reduce LMP circle
Charge transfer resistance between face, improves the surface migration speed of lithium ion and electronics, and then improves the high rate performance of electrode.
3. the PTh in LMP/PEG-PTh composites of the present invention can further reduce the contact surface of LMP and electrolyte
Product, suppresses manganese dissolving in the electrolytic solution, improves the cycle performance of LMP.
4. preparation method of the present invention is simple, and the thickness of PTh clads can be adjusted.
Brief description of the drawings
Fig. 1 is the structural representation of LMP/PEG-PTh composites of the present invention；
In figure：1、LMP；2、PEG；3、PTh.
Specific embodiment
The following is specific embodiment of the invention, and be described with reference to the drawings to technical scheme make further retouch
State, but the present invention is not limited to these embodiments.
As shown in figure 1, LMP/PEG-PTh composites of the invention are core 1 with LMP, PEG chains are attached with outside LMP cores 1
2, it is wrapped with PTh clads 3 in PEG chains 2.The network-like distribution of PEG chains 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 is than being 1：1：1：1 mixing,
Ball milling 15h is carried out in alcohol solvent, the slurry that solid content is 65% is obtained.Then dried at 90 DEG C, 400 mesh are crossed in grinding
Screen cloth, obtains LMP presomas.Precursor is bakeed in the tube furnace of nitrogen atmosphere at 650 DEG C again, is kept 8h, obtained
LMP, particle diameter is 100-200nm.
Weigh 1g LMP to be placed in the aqueous solution of the Triton X-100 surfactants containing 0.01g, by repeatedly super
Sound is stirred, and it is uniformly dispersed, and moisture is evaporated at room temperature, is ground, and obtains LMP/PEG composites.
LMP/PEG composites and deionized water are added in the there-necked flask containing chloroform, Ar is passed through as protection gas
Body simultaneously carries out mechanical agitation, after 1h, dropwise injects thiophene monomer, after uniform mixing, adds oxidant FeCl3(deionized water and
FeCl3Mol ratio be 2.5：1, thiophene monomer and FeCl3Mol ratio is 1：4) magnetic agitation polymerization, is carried out in 0 DEG C of water-bath
12h, is filtrated to get powder.It is again colourless by powder distilled water, absolute alcohol centrifuge washing to upper liquid, is done in 80 DEG C of vacuum
48h is done in dry case, grinding obtains the LMP/PEG-PTh composites of structure as shown in Figure 1.PTh contents are in composite
The content of 3.8wt%, LMP/PEG is 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 is than being 1.5：1：1：1 mixes
Close, ball milling 15h is carried out in alcohol solvent, obtain the slurry that solid content is 65%.Then dried at 90 DEG C, grinding crosses 400
Eye mesh screen, obtains LMP presomas.Precursor is bakeed in the tube furnace of nitrogen atmosphere at 600 DEG C again, is kept 8h, obtained
To LMP, particle diameter is 100-250nm.
Weigh 1g LMP to be placed in the aqueous solution of the Triton X-100 surfactants containing 0.015g, by repeatedly super
Sound is stirred, and it is uniformly dispersed, and moisture is evaporated at room temperature, is ground, and obtains LMP/PEG composites.
LMP/PEG composites and deionized water are added in the there-necked flask containing chloroform, Ar is passed through as protection gas
Body simultaneously carries out mechanical agitation, after 1h, dropwise injects thiophene monomer, after uniform mixing, adds oxidant FeCl3(deionized water and
FeCl3Mol ratio be 2.8：1, thiophene monomer and FeCl3Mol ratio is 1：4) magnetic agitation polymerization, is carried out in 20 DEG C of water-baths
18h, is filtrated to get powder.It is again colourless by powder distilled water, absolute alcohol centrifuge washing to upper liquid, is done in 80 DEG C of vacuum
48h is done in dry case, grinding obtains the LMP/PEG-PTh composites of structure as shown in Figure 1.PTh contents are in composite
The content of 7.5wt%, LMP/PEG is 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 is than being 2：1：1：1 mixing,
Ball milling 20h is carried out in acetone/water solvent, the slurry that solid content is 75% is obtained.Then dried at 90 DEG C, grinding crosses 400
Eye mesh screen, obtains LMP presomas.Precursor is bakeed in the tube furnace of nitrogen atmosphere at 500 DEG C again, is kept 15h, obtained
To LMP, particle diameter is 50-150nm.
Weigh 1g LMP to be placed in the aqueous solution of the Triton X-100 surfactants containing 0.02g, by repeatedly super
Sound is stirred, and it is uniformly dispersed, and moisture is evaporated at room temperature, is ground, and obtains LMP/PEG composites.
LMP/PEG composites and deionized water are added in the there-necked flask containing chloroform, Ar is passed through as protection gas
Body simultaneously carries out mechanical agitation, after 1h, dropwise injects thiophene monomer, after uniform mixing, adds oxidant FeCl3(deionized water and
FeCl3Mol ratio be 3：1, thiophene monomer and FeCl3Mol ratio is 1：4) magnetic agitation polymerization, is carried out in 20 DEG C of water-baths
18h, is filtrated to get powder.It is again colourless by powder distilled water, absolute alcohol centrifuge washing to upper liquid, is done in 80 DEG C of vacuum
48h is done in dry case, grinding obtains the LMP/PEG-PTh composites of structure as shown in Figure 1.PTh contents are in composite
The content of 11.5wt%, LMP/PEG is 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 with LMP/PEG-PTh composites
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 FeCl3Mol 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 FeCl3Mol ratio can also be 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 for 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：
Using anode material for lithium-ion batteries LMP/PEG-PTh composites obtained in above-described embodiment 1-3 as battery just
Pole active material prepares positive pole, is made to electrode, 1molL with metal lithium sheet-1LiPF6/ EC+DMC+EMC (volume ratios：1:1:1)
It is electrolyte, polypropylene material is barrier film, and 2032 button cells are assembled in the glove box of argon gas 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, is made anode sizing agent.Anode sizing agent is coated uniformly in aluminum foil current collector, drying, compressing tablet, punching are obtained
Positive plate, is made to electrode, with 1molL with metal lithium sheet-1LiPF6/ EC+DMC+EMC (volume ratios：1:1:1) it is electrolyte, with
Polypropylene material is barrier film, and 2032 button cells are assembled in the glove box of argon gas atmosphere.Surveyed using LAND CT2001A batteries
Test system, carries out charge-discharge test, between 2.2~4.4V of charging/discharging voltage scope with the constant multiplying powers of 0.1C and constant voltage.Knot
It is really：
LMP/PEG-PTh composites positive pole specific discharge capacity under 0.1C reaches 164.5mAh/g in Application Example 1
(active material quality is based on, capacity still has 137.9mAh/g under 5C, testing conservation rate after it circulates 1000 times under 2C multiplying powers is
93.7%.
LMP/PEG-PTh composites positive pole specific discharge capacity under 0.1C reaches 167.1mAh/g in Application Example 2
(active material quality is based on, capacity still has 144.4mAh/g under 5C, testing conservation rate after it circulates 1000 times under 2C multiplying powers is
95.4%.
LMP/PEG-PTh composites positive pole specific discharge capacity under 0.1C reaches 163.2mAh/g in Application Example 3
(active material quality is based on, capacity still has 135.7mAh/g under 5C, testing conservation rate after it circulates 1000 times under 2C multiplying powers is
92.8%.
In view of the present invention program embodiment is numerous, each embodiment experimental data is huge numerous, is not suitable for arranging one by one herein
Explanation is lifted, but the content of checking required for each embodiment and the final conclusion for obtaining are approached.So herein not to each reality
The checking content for applying example illustrated one by one, only using embodiment 1-3 and Application Example 1-3 as representing explanation the present patent application
Excellent part.
Specific embodiment described herein is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but simultaneously
Do not deviate by spirit of the invention or surmount scope defined in appended claims.
It is skilled to this area although having made a detailed description and being cited some specific embodiments to the present invention
For technical staff, as long as it is obvious that can be made various changes without departing from the spirit and scope of the present invention or corrected.
Claims (9)
1. anode material for lithium-ion batteries, it is characterised in that the positive electrode is LMP/PEG-PTh composites.
2. anode material for lithium-ion batteries according to claim 1, it is characterised in that the LMP/PEG-PTh composite woods
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, it is characterised 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, it is characterised in that the LMP is nanoscale, particle diameter is
50-250nm。
5. a kind of preparation method of the anode material for lithium-ion batteries as described in claim 1-4 is any, it is characterised in that the system
Preparation Method is comprised the following steps：
With LMP materials as core, in LMP core surface attachment PEG, LMP/PEG composites are obtained；
Conducting polymer PTh is deposited in LMP/PEG composite material surfaces, PTh/PEG-PTh composites are obtained.
6. the preparation method of anode material for lithium-ion batteries according to claim 5, it is characterised in that the LMP/PEG
The specific preparation method of composite is：
LMP is placed in the aqueous solution containing surfactant, LMP/PEG composites, the surface-active are obtained after drying
Agent has PEG chains.
7. the preparation method of anode material for lithium-ion batteries according to claim 6, it is characterised in that the surface-active
Agent is Triton X-100.
8. the preparation method of anode material for lithium-ion batteries according to claim 5, it is characterised in that the LMP/PEG
The method of composite material surface deposition conducting polymer PTh is in situ chemical oxidation method.
9. it is a kind of apply as described in claim 1-4 is any anode material for lithium-ion batteries lithium ion battery.
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| CN107482223A (en) * | 2017-09-29 | 2017-12-15 | 清华大学 | The preparation method of lithium ion battery electrode material composition, lithium ion battery and its electrode slurry |
| CN108711613A (en) * | 2018-05-18 | 2018-10-26 | 中南大学 | A kind of complex ternary positive electrode that polyaniline/polyethylene glycol wraps up altogether and its preparation and application |
| CN109713149A (en) * | 2018-12-25 | 2019-05-03 | 浙江大学 | A kind of stretchable electroluminescent device of high magnification and preparation method thereof |
| EP3664199A4 (en) * | 2017-09-28 | 2020-11-11 | LG Chem, Ltd. | Lithium secondary battery polymer material and manufacturing method therefor |
| 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 |
| WO2023184502A1 (en) * | 2022-04-01 | 2023-10-05 | 宁德时代新能源科技股份有限公司 | Positive electrode active material, preparation method therefor, positive electrode plate comprising same, secondary battery, and electric device |
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| EP3664199A4 (en) * | 2017-09-28 | 2020-11-11 | LG Chem, Ltd. | Lithium secondary battery polymer material and manufacturing method therefor |
| CN107482223A (en) * | 2017-09-29 | 2017-12-15 | 清华大学 | The preparation method of lithium ion battery electrode material composition, lithium ion battery and its electrode slurry |
| 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 |
| CN108711613A (en) * | 2018-05-18 | 2018-10-26 | 中南大学 | A kind of complex ternary positive electrode that polyaniline/polyethylene glycol wraps up altogether and its preparation and application |
| 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 |
| CN109713149A (en) * | 2018-12-25 | 2019-05-03 | 浙江大学 | A kind of stretchable electroluminescent device of high magnification 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 |
| WO2023184502A1 (en) * | 2022-04-01 | 2023-10-05 | 宁德时代新能源科技股份有限公司 | Positive electrode active material, preparation method therefor, positive electrode plate comprising same, secondary battery, and electric device |
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