CN107681147A - A kind of preparation method of solid electrolyte coating modification anode material for lithium-ion batteries and application - Google Patents

A kind of preparation method of solid electrolyte coating modification anode material for lithium-ion batteries and application Download PDF

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CN107681147A
CN107681147A CN201711082463.7A CN201711082463A CN107681147A CN 107681147 A CN107681147 A CN 107681147A CN 201711082463 A CN201711082463 A CN 201711082463A CN 107681147 A CN107681147 A CN 107681147A
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lithium
solid electrolyte
coating modification
positive electrode
preparation
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CN107681147B (en
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李喜飞
刘�文
熊东彬
李德军
孙学良
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Tianjin University
Tianjin Normal University
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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
    • 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
    • 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
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • 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
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • 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
    • 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
    • H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/028—Positive electrodes
    • 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 preparation method and application of solid electrolyte coating modification anode material for lithium-ion batteries, belong to lithium ion battery electrode material field.Including：（1）Under certain condition, silicon source and lithium source are scattered in organic solvent, then appropriate suitable stabilizer is added dropwise, obtain inclined aluminium lithate colloidal sol；（2）Take appropriate positive electrode to add above-mentioned colloidal sol, be transferred to ptfe autoclave liner, directly using solvent-thermal method, obtain solid electrolyte coating modification positive electrode material precursor；（3）Prepared solid electrolyte coating modification positive electrode material precursor is calcined, produce dense uniform, the anode material for lithium-ion batteries of the good ultra-thin solid electrolyte coating modification of stability, it has good cyclical stability, excellent high rate performance and reliable security, and the preparation method has that cost is low, it is simple to operate, the features such as environment-friendly, industrialization production can be applied on a large scale.

Description

A kind of preparation method of solid electrolyte coating modification anode material for lithium-ion batteries with Using
Technical field
The invention belongs to energy storage and modified transformation technology field, a kind of solid electrolyte coating modification lithium is related generally to Application of ion battery positive electrode and preparation method thereof.
Background technology
Lithium ion battery is a kind of mechanism of new electrochemical power sources developed in recent years, is that countries in the world fall over each other to research and develop Focus, it has the characteristics that small volume, light weight, memory-less effect higher than energy, long circulation life, has been widely used In fields such as mobile device, electric automobile energies.In each several part component of lithium ion battery, electrode material is lithium ion battery Core and critical material.The quality of electrode material directly determines ratio energy, cycle life and the anti-load of lithium ion battery The multinomial key performance such as ability.Therefore, developing high-performance and the anode material for lithium-ion batteries in high circulation life-span becomes entirely The common objective of world research personnel, the exploitation meaning of the lifting to performance of lithium ion battery, especially power-type lithium ion battery It is adopted and its great.
Coating modification is using a kind of excellent material of physical and chemical performance, and one layer is formed in target material particle surface The guard method of even clad.Researcher is coated using solid electrolyte to positive electrode, the results showed that, solid state electrolysis The positive electrode of matter coating modification has higher capacity, good high rate performance and superior cycle performance.
The preparation method of current existing coating modification anode material for lithium-ion batteries mainly has high-energy ball milling method, and colloidal sol coagulates Glue method etc., such as Chinese patent CN101950803A, it is present, and covered effect is coarse, and ultra-thin cladding controls the problems such as difficult, although The service life of positive electrode is improved, but the capacity of positive electrode, high rate performance are restricted.Therefore, finding one kind has into Effect, simple to operate, the low and environment-friendly preparation method of cost is imperative.
The content of the invention
The present invention is for current technical problem to be solved, the defects of overcoming current anode material for lithium-ion batteries, Provide the good ultra-thin solid electrolyte LiAlO of a kind of dense uniform, stability2Coating modification anode material for lithium-ion batteries Method, this method is effective, simple to operate, and cost is low, environment-friendly, is advantageous to industrialized production.
The purpose of the present invention be to provide a kind of solid electrolyte coating modification anode material for lithium-ion batteries lithium from Application in sub- battery, the lithium ion battery of high power capacity, high rate capability, long circulation life and high security can be obtained.
Preferable scheme, lithium source LiCl, LiNO3、CH2OLi、 CH3COOLi、（CH3）2CHOLi wherein at least one.
More preferably scheme, silicon source C12H27O3Al、C9H21O3Al wherein at least one.
Preferable scheme, lithium source：Silicon source（The amount of lithium atom material：The amount of aluminium atom material）Mol ratio is between 1 ~ 1.2.
More preferably scheme, stoichiometric proportion obtain lithium metaaluminate material amount for positive electrode material amount 0.2 ~ 0.4%。
Preferable scheme, positive electrode are：Ternary LiNi with layer structure1-x-yCoxMny（0<x+y<1）Material.
More preferably scheme, solvent-thermal method, its reaction time are 6h ~ 15h.
Preferable scheme, calcination time are 2h ~ 4h.
, will be described solid present invention also offers the application of the solid electrolyte coating modification anode material for lithium-ion batteries State electrolyte coating modification anode material for lithium-ion batteries is applied to lithium ion battery.
The method that the present invention prepares solid electrolyte coating modification lithium ion anode material includes step in detail below：
（1）Prepare lithium metaaluminate colloidal sol：A certain amount of silicon source, lithium source and stabilizer are dispersed in a certain amount of organic solvent respectively In, 2 ~ 4h is stirred at room temperature.
（2）The presoma of the anode material for lithium-ion batteries of lithium metaaluminate cladding：Take a certain amount of positive electrode with it is above-mentioned molten Glue, it is transferred in ptfe autoclave, at a temperature of 120 ~ 180 DEG C, is incubated 6-15h, obtained product is washed by filtering After washing, it is put into air dry oven, at 80 DEG C, dries 2 ~ 4h, produce the anode material for lithium-ion batteries of lithium metaaluminate cladding Presoma.
（3）By step（2）In prepared presoma be placed in porcelain crucible, in 400 ~ 500 DEG C of 2 ~ 4h of temperature lower calcination, from Room temperature so is cooled to, that is, obtains the anode material for lithium-ion batteries of lithium metaaluminate cladding.
The present invention further discloses solid electrolyte coating modification anode material for lithium-ion batteries for prepare lithium from Application in terms of sub- battery.Its method：By solid electrolyte coating modification lithium ion anode material and conductive black（Conductive agent） And polyvinylidene fluoride（PVDF binding agents）And a small amount of 1-METHYLPYRROLIDONE（NMP）It is ground to be thoroughly mixed to form uniform paste Shape thing, coated in, as test electrode, its electrolyte is 1M LiPF in foil substrate6/EC：DMC（V：V=1:1）, and with metal Lithium is used as and button cell is made to electrode.Experimental result is shown：Solid electrolyte LiAlO2The positive electrode of cladding LiNi0.6Co0.2Mn0.2O2By the charge-discharge test of 350 times, capacity still can reach 149 mA h/g
Technical scheme, a certain amount of silicon source, lithium source and stabilizer are dispersed in a certain amount of organic solvent, room temperature Stir 2 ~ 4h, generate lithium metaaluminate colloidal sol, by solvent-thermal method, uniform adsorption on positive electrode surface, formed one layer it is ultra-thin LiAl(OH)4Clad, LiAl (OH)4Further dehydration generates LiAlO at high temperature2。
Primary study of the present invention solid electrolyte LiAlO2Clad anode material LiNi0.6Co0.2Mn0.2O2Preparation method and Using it is low mainly to solve the cycle life of lithium ion battery that presently, there are, the problem of high rate performance difference.
Clad in fast-ionic conductor coated lithium ion battery positive electrode prepared by technical scheme is fine and close Uniformly, stability is good, can effectively prevent during the charge and discharge cycles of lithium ion battery, corrosion of the electrolyte to positive electrode Effect, the cycle life of lithium ion battery is greatly extended, and promote the effect of lithium ion transport, improve lithium ion battery Chemical property.
The method for preparing solid electrolyte coated lithium ion battery positive electrode of the present invention, takes full advantage of silicon source and lithium Generation lithium metaaluminate colloidal sol is reacted in source in organic solvent, and the colloidal sol has preferable absorption property and decomposed at high temperature Generate LiAlO2Principle.The good solid electrolyte clad of ultra-thin dense uniform, stability, energy are formed on positive electrode surface Effectively prevent positive active material from directly being contacted with electrolyte solution, so as to suppress the side reaction of electrode material and electrolyte, subtract The loss by dissolution of small positive active material, greatly extends the cycle life of battery, at the same greatly improve electrode electronics and The conductance of lithium ion, improve the chemical property of lithium ion battery.
The anode material for lithium-ion batteries of the solid electrolyte coating modification of the present invention is closed by sol-solvent heat auxiliary Into with reference to the method preparation of high temperature sintering, this method cost of material is low, is simple to operate and friendly to environment, and overcomes traditional solid-state In electrolyte coating modification method, because cost of material is high, covered effect is coarse, the shortcomings of poor controllability.
The method of the anode material for lithium-ion batteries of solid electrolyte coating modification prepared by the present invention is auxiliary by solvent heat Method is helped, cladding raw material is activated more abundant, raw material availability is improved, and makes process simplification, mild condition.
Ultra-thin solid electrolyte coating modification anode material for lithium-ion batteries prepared by the present invention, applied to lithium-ion electric Pond, higher capacity, good high rate performance and excellent cycle performance are shown, greatly extends following for lithium ion battery The ring life-span.
Brief description of the drawings
Fig. 1 is LiAlO in embodiment2LiNi before and after coating modification0.6Co0.2Mn0.2O2Positive electrode scanning electron microscope (SEM) photograph；
Fig. 2 is LiAlO in embodiment2LiNi before and after coating modification0.6Co0.2Mn0.2O2The full spectrograms of positive electrode XPS；
Fig. 3 is LiAlO in embodiment2LiNi after coating modification0.6Co0.2Mn0.2O2Positive electrode high resolution scanning transmission electron microscope Figure；
Fig. 4 is the LiNi without coating modification0.6Co0.2Mn0.2O2In positive electrode and embodiment after obtained coating modification LiNi0.6Co0.2Mn0.2O2Positive electrode time cycle performance curve map.
Embodiment
The present invention is described below by specific embodiment.Unless stated otherwise, technological means used in the present invention It is method known in those skilled in the art.In addition, embodiment is interpreted as illustrative, it is not intended to limit the present invention Scope, the spirit and scope of the invention are limited only by the claims that follow.To those skilled in the art, without departing substantially from this The various changes carried out on the premise of invention spirit and scope to the material component in these embodiments and dosage or change Belong to protection scope of the present invention.Raw materials used and reagent of the invention is commercially available.
Embodiment 1
（1）By C9H21O3Al and CH2OLi is scattered in ethanol, then appropriate suitable stabilizer is added dropwise（Stabilizer：Ethanol Volume ratio:3：2000）, the inclined aluminium lithate colloidal sol of stirring 1h acquisitions；
（2）Take 0.3 g positive electrodes LiNi0.6Co0.2Mn0.2O2Above-mentioned colloidal sol is added, is transferred in ptfe autoclave Lining, 1 ~ 2h is stirred, 120 ~ 180 DEG C are incubated 15h directly using solvent-thermal method, before obtaining solid electrolyte coating modification positive electrode Drive body；
（3）By step（2）Middle product, filtering, is then washed 3 times with absolute ethyl alcohol, then by forced air drying of the filter cake at 80 DEG C 3h is incubated in case, obtains LiAlO2The presoma of clad anode material；
（4）By prepared solid electrolyte coating modification positive electrode material precursor in 500 DEG C of temperature lower calcination 4h, solid-state is produced Electrolyte coating modification anode material for lithium-ion batteries；
（5）Weigh 0.68g LiAlO obtained above2The LiNi of coating modification0.6Co0.2Mn0.2O2Positive electrode, 0.08g is added to lead Electric carbon black is added dropwise a small amount of NMP, is then ground, form uniform paste as conductive agent, 0.08g PVDF as binding agent Shape, coated in test electrode is used as on aluminium foil, with 1M LiPF6/EC：DMC（V:V=1:1）, test charge-discharge performance（Electric current is close Spend for 50mAh/g）；
Using the LiNi after coating modification manufactured in the present embodiment0.6Co0.2Mn0.2O2Positive electrode, its material characterization and electrochemistry Performance is as shown in following figure：
Fig. 1 is scanning electron microscope (SEM) photograph, it may be seen that the LiNi without coating modification0.6Co0.2Mn0.2O2Positive electrode is by size The spherical structure formed for 500-800nm primary particle, surface are smooth.By solid electrolyte（LiAlO2）Coating modification LiNi afterwards0.6Co0.2Mn0.2O2Positive electrode particle surface has the clad being evenly distributed, and rough surface.
Fig. 2 is the full spectrograms of XPS, it can be seen that LiNi0.6Co0.2Mn0.2O2Positive electrode passes through solid electrolyte （LiAlO2）After coating modification, surface is coated by solid electrolyte well.
Fig. 3 is solid electrolyte（LiAlO2）LiNi after coating modification0.6Co0.2Mn0.2O2The high-resolution transmission of positive electrode Electron microscope, indicate solid electrolyte（LiAlO2）Ultra-thin dense uniform is coated on positive electrode surface.
Fig. 4 is the LiNi before coating modification0.6Co0.2Mn0.2O2After positive electrode and coating modification LiNi0.6Co0.2Mn0.2O2The long circulating performance map of positive electrode, show to use solid electrolyte（LiAlO2）After coating modification LiNi0.6Co0.2Mn0.2O2Electrode made of positive electrode, at room temperature, under 50mAh/g current density, during constant-current discharge, Specific capacity may remain in 149 mA h/g after circulating 350 times, and voltage is maintained at 4.5 V and shows good cycle performance.
Embodiment 2
（1）By C12H27O3Al and CH2OLi is scattered in ethanol, then appropriate suitable stabilizer is added dropwise（Stabilizer：Ethanol Volume ratio:3：2000）, the inclined aluminium lithate colloidal sol of stirring 1h acquisitions；
（2）Take 0.3 g positive electrodes LiNi0.5Co0.2Mn0.3O2Above-mentioned colloidal sol is added, is transferred in ptfe autoclave Lining, 1 ~ 2h is stirred, 120 ~ 180 DEG C are incubated 15h directly using solvent-thermal method, before obtaining solid electrolyte coating modification positive electrode Drive body；
（3）By step（2）Middle product, filtering, is then washed 3 times with absolute ethyl alcohol, then by forced air drying of the filter cake at 80 DEG C 4h is incubated in case, obtains LiAlO2The presoma of clad anode material；
（4）By prepared solid electrolyte coating modification positive electrode material precursor in 500 DEG C of temperature lower calcination 4h, solid-state is produced Electrolyte coating modification anode material for lithium-ion batteries；
（5）Weigh 0.68g LiAlO obtained above2The LiNi of coating modification0.5Co0.2Mn0.3O2Positive electrode, 0.08g is added to lead Electric carbon black is added dropwise a small amount of NMP, is then ground, form uniform paste as conductive agent, 0.08g PVDF as binding agent Shape, coated in test electrode is used as on aluminium foil, with 1M LiPF6/EC：DMC（V:V=1:1）, test charge-discharge performance（Electric current is close Spend for 50mAh/g）；
Using LiAlO manufactured in the present embodiment2LiNi after coating modification0.5Co0.2Mn0.3O2Positive electrode prepare electrode and with Metal lithium sheet is assembled into button cell, and at room temperature during constant-current discharge, specific capacity may remain in 175 mA h after circulation time 100 / g, voltage are maintained at 4.5V, show good cycle performance.
Embodiment 3
（1）By C9H21O3Al and LiNO3It is scattered in ethanol, then appropriate suitable stabilizer is added dropwise（Stabilizer：The body of ethanol Product ratio:3：2000）, the inclined aluminium lithate colloidal sol of stirring 1h acquisitions；
（2）Take 0.3 g positive electrodes LiNi0.6Co0.2Mn0.3O2Above-mentioned colloidal sol is added, is transferred in ptfe autoclave Lining, 1 ~ 2h is stirred, 120 ~ 180 DEG C are incubated 15h directly using solvent-thermal method, before obtaining solid electrolyte coating modification positive electrode Drive body；
（3）By step（2）Middle product, filtering, is then washed 3 times with absolute ethyl alcohol, then by forced air drying of the filter cake at 80 DEG C 2 ~ 4h is incubated in case, obtains LiAlO2The presoma of clad anode material；
（4）By prepared solid electrolyte coating modification positive electrode material precursor in 500 DEG C of temperature lower calcination 4h, solid-state is produced Electrolyte coating modification anode material for lithium-ion batteries；
（5）Weigh 0.68g LiAlO obtained above2The LiNi of coating modification0.33Co0.33Mn0.33O2Positive electrode, add 0.08g Conductive black is added dropwise a small amount of NMP, is then ground, form uniform paste as conductive agent, 0.08g PVDF as binding agent Shape, coated in test electrode is used as on aluminium foil, with 1M LiPF6/EC：DMC（V:V=1:1）, test charge-discharge performance（Electric current is close Spend for 50mAh/g）；
Using LiAlO manufactured in the present embodiment2LiNi after coating modification0.5Co0.2Mn0.3O2Positive electrode prepare electrode and with Metal lithium sheet is assembled into button cell, and at room temperature during constant-current discharge, specific capacity may remain in 185 mA h after circulation time 100 / g, voltage are maintained at 4.5 V, show good cycle performance.
Embodiment 4
（1）By C9H21O3Al and（CH3）2CHOLi is scattered in ethanol, then appropriate suitable stabilizer is added dropwise（Stabilizer：Second The volume ratio of alcohol:3：2000）, the inclined aluminium lithate colloidal sol of stirring 1h acquisitions；
（2）Take 0.3 g positive electrodes LiNi0.33Co0.33Mn0.33O2Above-mentioned colloidal sol is added, is transferred to ptfe autoclave Liner, 1 ~ 2h is stirred, directly using 120 ~ 180 DEG C of insulation 15h of solvent-thermal method, obtain solid electrolyte coating modification positive electrode Presoma；
（3）By step（2）Middle product, filtering, is then washed 3 times with absolute ethyl alcohol, then by forced air drying of the filter cake at 80 DEG C 2 ~ 4h is incubated in case, obtains LiAlO2The presoma of clad anode material；
（4）By prepared solid electrolyte coating modification positive electrode material precursor in 500 DEG C of temperature lower calcination 4h, solid-state is produced Electrolyte coating modification anode material for lithium-ion batteries；
（5）Weigh 0.68g LiAlO obtained above2The LiNi of coating modification0.33Co0.33Mn0.33O2Positive electrode, add 0.08g Conductive black is added dropwise a small amount of NMP, is then ground, form uniform paste as conductive agent, 0.08g PVDF as binding agent Shape, coated in test electrode is used as on aluminium foil, with 1M LiPF6/EC：DMC（V:V=1:1）, test charge-discharge performance（Electric current is close Spend for 50mAh/g）；
Using LiAlO manufactured in the present embodiment2LiNi after coating modification0.5Co0.2Mn0.3O2Positive electrode prepare electrode and with Metal lithium sheet is assembled into button cell, and at room temperature during constant-current discharge, specific capacity may remain in 147 mA h after circulation time 100 / g, voltage are maintained at 4.5 V, show good cycle performance.

Claims (7)

1. a kind of preparation method of solid electrolyte coating modification anode material for lithium-ion batteries, it is characterised in that by following step It is rapid to carry out：
（1）Silicon source and lithium source are scattered in organic solvent, then appropriate suitable stabilizer is added dropwise, 1 ~ 2h of stirring obtains inclined lithium Sour Alumina gel；
（2）Take 0.3 ~ 2 g positive electrodes to add above-mentioned colloidal sol, be transferred to ptfe autoclave liner, stir 1 ~ 2h, directly Using 120 ~ 180 DEG C of 6 ~ 15h of insulation of solvent-thermal method, solid electrolyte coating modification positive electrode material precursor is obtained；
（3）By step（2）Middle product, filtering, is then washed 3 times with absolute ethyl alcohol, then by forced air drying of the filter cake at 80 DEG C 2 ~ 4h is incubated in case, obtains LiAlO2The presoma of clad anode material；
（4）By prepared solid electrolyte coating modification positive electrode material precursor in 400 ~ 500 DEG C of temperature lower calcination 4h, produce Solid electrolyte coating modification anode material for lithium-ion batteries, lithium metaaluminate coating thickness is in 0.5-2 nanometers；
Described stabilizer refers to:Ethyl acetoacetate；
Silicon source：The mol ratio of lithium source is than 1：1；Stabilizer：The volume ratio of organic solvent:3：2000；
Described positive electrode is：Ternary LiNi with layer structure1-x-yCoxMny（0<x+y<1）Material, lithium-rich manganese-based material Material.
2. the preparation method described in claim 1, it is characterised in that：Lithium metaaluminate coating thickness in 0.5-2 nanometers, material Mol ratio is the 0.20 ~ 0.40% of the amount of positive electrode material；Ethanol, one kind of ethylene glycol can be selected in described organic solvent.
3. the preparation method described in claim 1, it is characterised in that：The lithium source is LiCl, LiNO3、CH2OLi、 CH3COOLi Or（CH3）2CH2OLi。
4. the preparation method described in claim 1, it is characterised in that：Source of aluminium is C12H27O3Al or C9H21O3Al。
5. the preparation method described in claim 1, it is characterised in that：Solvent-thermal method, its reaction time are 6h ~ 15h.
6. the preparation method described in claim 1, it is characterised in that：Calcination time is 2h ~ 4h.
7. the solid electrolyte coating modification anode material for lithium-ion batteries prepared using claim 1 methods described is for making Application in terms of standby lithium ion battery.
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CN110233237A (en) * 2018-03-06 2019-09-13 中信国安盟固利动力科技有限公司 A kind of combination electrode of all-solid lithium-ion battery and preparation method thereof
CN110581272A (en) * 2019-09-30 2019-12-17 昆明云大新能源有限公司 high-performance ternary cathode material for lithium ion battery and preparation method of ternary cathode material
CN110668507A (en) * 2019-09-30 2020-01-10 湖北万润新能源科技发展有限公司 Preparation method of ternary cathode material of lithium-rich manganese-based coating layer
CN112054194A (en) * 2020-08-07 2020-12-08 西安理工大学 Phosphorus-modified lithium ion battery positive electrode material and preparation method and application thereof
CN115425214A (en) * 2022-09-29 2022-12-02 合肥国轩高科动力能源有限公司 Coating modified high-nickel ternary cathode material, and preparation method and application thereof
CN115425214B (en) * 2022-09-29 2024-04-19 合肥国轩高科动力能源有限公司 Coating modified high-nickel ternary positive electrode material, preparation method and application thereof

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