CN106299267A - A kind of preparation method of titanium phosphate lithium titanate cathode material - Google Patents

A kind of preparation method of titanium phosphate lithium titanate cathode material Download PDF

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CN106299267A
CN106299267A CN201510666912.7A CN201510666912A CN106299267A CN 106299267 A CN106299267 A CN 106299267A CN 201510666912 A CN201510666912 A CN 201510666912A CN 106299267 A CN106299267 A CN 106299267A
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carbon source
cathode material
titanium phosphate
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titanium
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CN106299267B (en
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杨安臣
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Jiangxi Jin Li Polytron Technologies Inc
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肖水龙
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    • 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
    • H01M4/58—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
    • 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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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/10—Energy storage using batteries

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Abstract

The present invention relates to green energy resource field of material technology, the preparation method of a kind of titanium phosphate lithium titanate cathode material for the lithium ion battery with aqueous solution as electrolyte.The present invention, by adding the carbon source that glass transition temperature is higher in the slurry, can thoroughly solve the wall sticking phenomenon caused in spray-drying process owing to organic carbon source adds.Carbon source is divided into two batches add in materials, is formed and just add the secondary carbon source of the second batch and make secondary carbon source and first presoma mixed at high speed after precursor, compounded carbons with the use of can act to obtain very well carbon covered effect on titanium phosphate lithium surface.Cladding through secondary carbon source can increase LiTi2(PO4)3Electric conductivity between granule, makes LiTi2(PO4)3Electrical conductivity be significantly improved, carbon cladding LiTi2(PO4)3There is in aqueous electrolyte good cyclical stability.The present invention has that production process is continuous, product property is uniform, stay-in-grade feature, and simple for process, production suitable for industrialized.

Description

A kind of preparation method of titanium phosphate lithium titanate cathode material
Technical field
The present invention relates to green energy resource field of material technology, particularly relate to a kind of for aqueous solution as electricity Solve the preparation method of the titanium phosphate lithium titanate cathode material of the lithium ion battery of liquid.
Background technology
The negative material of lithium ion battery uses various embedding lithium material with carbon element mostly at present.But the electricity of carbon electrode Position and the current potential of lithium metal very close to, when the battery is overcharged, carbon electrodes easy precipitating metal lithium, meeting Form dendrite and cause short circuit；Thermal runaway etc. is easily caused when temperature is too high.Meanwhile, lithium ion is repeatedly Insert and during deintercalation, material with carbon element structure can be made to be destroyed, thus cause the decay of capacity.Therefore, Searching can embed lithium, cheap and easy to get, safe and reliable and Fabrication of High Specific Capacitance under the current potential more positive than Carbon anode current potential The new negative material of amount is necessary.
For negative material, there is the LiTi of NASICON structure2(PO4)3Lithium ion battery negative material Material has high ionic conductivity, and theoretical discharge specific capacity is 138.3mAh/g, and intercalation potential is left at 2.5V The right side, and charge and discharge process has smooth electrochemical reaction platform, is provided that stable running voltage. It is-0.5V to standard hydrogen electrode, just (1.5V in the range of the electrochemical stability window of water under neutral environment -0.5V), comply fully with the negative electrode active material requirement of aquo-lithium ion battery.
There are some researches show, by LiTi2(PO4)3With LiMn2O4Prepare aquo-lithium ion battery, battery defeated Going out voltage is 1.5V, and higher than ni-mh, nickel-cadmium cell (1.2V), electric discharge specific energy density reaches 60Wh/kg, Substantially exceed lead-acid battery.
But LiTi2(PO4)3As during negative material due to its low conductivity, cause material discharge and recharge Polarization in journey is relatively big, and the chemical property of material is poor.Synthesis LiTi2(PO4)3Time need carry out repeatedly heat Processing and grind, complex process, cost is the highest.It is thus desirable to it is simple to explore a set of technique, cost is relatively Low, can guarantee that simultaneously and obtain high-purity LiTi2(PO4)3Preparation method.
Summary of the invention
The present invention is directed to existing LiTi2(PO4)3Under negative material conductivity, chemical property difference and life Produce the problem that cost is high, it is provided that a kind of good conductivity, excellent electrochemical performance and applicable industrialized production The preparation method of titanium phosphate lithium titanate cathode material.
For achieving the above object, the present invention is by the following technical solutions.
The preparation method of a kind of titanium phosphate lithium titanate cathode material, comprises the following steps:
S1 disperses: lithium source, titanium source, phosphorus source, a carbon source and dispersant is uniform, and The granularity controlling material is 500-800nm, obtains slurry.
Preferably, lithium source, titanium source, phosphorus source, a carbon source and dispersant are placed in ball mill, Ball milling 3-10h, obtains dispersed mixture；The most again dispersed mixture is placed in sand mill, sand milling 1-6h is 500-800nm to the granularity of material, obtains slurry.
The solid content of described slurry is 10-50%；In described slurry, the mol ratio of lithium, titanium and phosphorus For 1-1.05:2:3.
Described lithium source is at least one in lithium carbonate, lithium dihydrogen phosphate and Lithium hydrate；Described titanium Source is titanium dioxide and/or titanium phosphate；Phosphorus source is ammonium dihydrogen phosphate, phosphoric acid and biphosphate At least one in lithium；A described carbon source be maltodextrin, betacyclodextrin, phenolic resin, At least one in polyvinylpyrrolidone, Polyethylene Glycol and carbon black；Described dispersant is deionization Water.
S2 is spray-dried: slurry is placed in drying-granulating in spray dryer, obtains just presoma.
The inlet temperature of described spray dryer is 200-400 DEG C, and outlet temperature is 90-150 DEG C；
Bis-mixing of S3: first presoma is placed in mixer with secondary carbon source and mixes 2-4h, Mixing presoma.
A described carbon source forms carbon source with secondary carbon source, and the quality of described carbon source is titanium phosphate lithium reason The 1-10% of opinion growing amount；A described carbon source is 0.1-10 with the mass ratio of secondary carbon source.
Described secondary carbon source is at least one in glucose, sucrose, succinic acid and stearic acid.
S4 sinters: is placed in by mixing presoma in having the kiln of protective atmosphere and is sintered, Making material be cooled to room temperature after terminating, comminuting matter obtains titanium phosphate lithium titanate cathode material.
Preferably, during sintering, heat up with the speed of 2-10 DEG C/min, burn at 800-1000 DEG C Knot 8-20h, then naturally cools to room temperature.
Preferably, described protective atmosphere is nitrogen or argon.
Compared with prior art, the invention has the beneficial effects as follows:
(1) present invention is by adding the carbon source that glass transition temperature is higher in the slurry, permissible Thoroughly solve the wall sticking phenomenon caused in spray-drying process owing to organic carbon source adds.
(2) present invention adds in material by carbon source is divided into two batches, adds after forming first precursor again Enter the secondary carbon source of the second batch and make secondary carbon source and first presoma mixed at high speed, the cooperation of compounded carbons Use and can act to obtain very well carbon covered effect on titanium phosphate lithium surface.Cladding through secondary carbon source can Increase LiTi2(PO4)3Electric conductivity between granule, makes LiTi2(PO4)3Electrical conductivity obtained significantly carrying High；Additionally, the carbon-coating that titanium phosphate lithium titanate cathode material is coated with due to it, lithium ion not only can be made to pass through, and And can also effectively stop the side reaction caused because of water and electrode material contacts.Therefore, carbon is coated with LiTi2(PO4)3There is in aqueous electrolyte good cyclical stability.
(3) preparation method of the titanium phosphate lithium titanate cathode material of the present invention have production process continuously, product Uniform properties, stay-in-grade feature, and simple for process, production suitable for industrialized.
Accompanying drawing explanation
Fig. 1 is the XRD figure of the titanium phosphate lithium titanate cathode material of embodiment 1 preparation；
Fig. 2 is the charging and discharging curve figure of the titanium phosphate lithium titanate cathode material of embodiment 1 preparation；
Fig. 3 is the charging and discharging curve figure of the titanium phosphate lithium titanate cathode material of embodiment 2 preparation.
Detailed description of the invention
In order to understand the technology contents of the present invention more fully, below in conjunction with specific embodiment to the present invention's Technical scheme is described further and illustrates.
Embodiment 1
By lithium dihydrogen phosphate 24.6 kilograms (236.7mol), ammonium dihydrogen phosphate 51.5 kilograms (445mol), Titanium dioxide 36.8 kilograms (453.8mol), betacyclodextrin 7.12 kilograms are placed in ball mill, then add Entering deionized water 180 kilograms and carry out ball milling, Ball-milling Time is 4 hours, makes dispersed mixture (admittedly contain Amount is 40%)；With membrane pump dispersed mixture squeezed into the most again a mixing bowl of sand mill is carried out ultra-fine Mill, high speed sand milling 4h, make the Task-size Controlling of material between 500-800nm, prepare slurry.(according to The consumption of lithium source, titanium source and phosphorus source calculates, and the theoretical growing amount of titanium phosphate lithium is 227.25mol, 88.14Kg。)
Being placed in spray dryer by gained slurry and carry out mist projection granulating, holding inlet temperature is 200-250 DEG C, outlet temperature is 100 DEG C, obtains presoma at the beginning of 108 kilograms.Again by before at the beginning of 108 kilograms Drive in body is placed in VCH type high-speed mixer together with 10 kilograms of glucoses and carry out mix homogeneously, during mixing Between be 2.5h, obtain mixing presoma.
Then, then by mixing presoma it is placed in the kiln of nitrogen atmosphere sintering, with 2-10 DEG C/min Programming rate heat up, at 800 DEG C sinter 12h, then make material naturally cool to room temperature.Finally Pulverize gained material after sintering, obtain titanium phosphate lithium titanate cathode material.
The XRD figure of titanium phosphate lithium titanate cathode material prepared by the present embodiment sees Fig. 1.
Meanwhile, the titanium phosphate lithium titanate cathode material preparing the present embodiment carries out charge-discharge test, and half-cell is surveyed Strip part is as follows: the test of battery is carried out under room temperature (25 DEG C), with metal lithium sheet as negative pole, and positive pole Sheet by the titanium phosphate lithium material of 80% (mass ratio), the super P (super conductive black) of 10%, 10% glue Connect agent (Kynoar, PVDF), with NMP (N-2 methyl pyrrolidone) as solvent with dispersant, Making slurry, the solid content of slurry is 45%, and then slurry is coated on 20 microns of thick aluminium foils system Become thin film, then thin film is washed into after 120 DEG C of vacuum dryings 10mm thin slice makes.Electrolyte is 1mol/l LiPF6/(EC+DME).Barrier film uses Celgard 2400 film (barrier film bought from market).Battery Make in the glove box being filled with high-purity argon gas.0.2C charging and discharging curve is as shown in Figure 2.
In titanium phosphate lithium titanate cathode material prepared by this example, carbon content is 5.29%, half-cell capacity 0.2C It is 123mAh/g for 127.8mAh/g, 1C.
Embodiment 2
By Lithium hydrate 9.90 kilograms (233.7mol), the phosphoric acid that mass percentage concentration is 85% of phosphoric acid Liquid 8.72 kilograms (75.6mol, first with 20 kilograms of deionized water dilutions before mixing), ammonium dihydrogen phosphate 70.04 kilograms (605.12mol), titanium dioxide 36.8 kilograms (453.8mol), maltodextrin 8 kilograms Being placed in ball mill, be subsequently adding deionized water 175 kilograms and carry out ball milling, Ball-milling Time is 4 hours, Make dispersed mixture (solid content is 40%).With membrane pump, dispersed mixture is squeezed into sand milling the most again The sand milling a mixing bowl of machine carries out Ultrafine Grinding, at a high speed mill 4h, make the granularity of material 500-800nm it Between, prepare slurry.
Being placed in spray dryer by gained slurry and carry out mist projection granulating, holding inlet temperature is 200-250 DEG C, outlet temperature is 100 DEG C, obtains presoma at the beginning of 108 kilograms.Again by before at the beginning of 108 kilograms Drive in body is placed in VCH type high-speed mixer together with 10 kilograms of glucoses and carry out mix homogeneously, during mixing Between be 2.5h, obtain mix presoma.
Then, mixing presoma is placed in the kiln of nitrogen atmosphere sintering, with the liter of 2-10 DEG C/min Temperature speed heats up, and sinters 12h, then make material naturally cool to room temperature at 800 DEG C.Finally pulverize Gained material after sintering, obtains titanium phosphate lithium titanate cathode material.
The titanium phosphate lithium titanate cathode material preparing the present embodiment carries out charge-discharge test, half-cell test condition Identical with the half-cell test condition in embodiment 1.0.2C charging and discharging curve is as shown in Figure 3.
In titanium phosphate lithium titanate cathode material prepared by the present embodiment, carbon content is 6.08%, half-cell capacity 0.2C It is 114.6mAh/g for 118mAh/g, 1C.
Embodiment 3
By lithium dihydrogen phosphate 24.8 kilograms (238.3mol), ammonium dihydrogen phosphate 51.2 kilograms (442.5mol), Titanium dioxide 36.8 kilograms of (453.8mol), betacyclodextrin 3Kg, phenolic resin 1Kg and carbon black 0.587Kg is placed in ball mill, is subsequently adding deionized water 121.5 kilograms and carries out ball milling, Ball-milling Time It is 10 hours, makes dispersed mixture (solid content is 50%)；The most again with membrane pump by dispersion mixing Thing is squeezed in a mixing bowl of sand mill and is carried out Ultrafine Grinding, high speed sand milling 1h, makes the Task-size Controlling of material exist Between 500-800nm, prepare slurry.(calculate according to the consumption of lithium source, titanium source and phosphorus source, titanium phosphate The theoretical growing amount of lithium is 226.9mol, 88.0Kg.)
Being placed in spray dryer by gained slurry and carry out mist projection granulating, holding inlet temperature is 370-400 DEG C, outlet temperature is 150 DEG C, obtains presoma at the beginning of 108 kilograms.Again by before at the beginning of 108 kilograms Drive in body is placed in VCH type high-speed mixer together with 2.587 kilograms of glucoses, 2Kg sucrose and mix Closing uniformly, incorporation time is 4h, obtains mixing presoma.
Then, then by mixing presoma it is placed in the kiln of argon gas atmosphere sintering, with 2-10 DEG C/min Programming rate heat up, at 100 DEG C sinter 8h, then make material naturally cool to room temperature.Final powder Gained material after broken sintering, obtains titanium phosphate lithium titanate cathode material.
The titanium phosphate lithium titanate cathode material preparing the present embodiment carries out charge-discharge test, half-cell test condition Identical with the half-cell test condition in embodiment 1.
In titanium phosphate lithium titanate cathode material prepared by the present embodiment, carbon content is 3.38%, half-cell capacity 0.2C It is 110.2mAh/g for 116mAh/g, 1C.
Embodiment 4
By lithium dihydrogen phosphate 24.8 kilograms (238.3mol), ammonium dihydrogen phosphate 51.2 kilograms (442.5mol), Titanium dioxide 36.8 kilograms of (453.8mol), maltodextrin 2Kg, Polyethylene Glycol 1.5Kg and polyethylene pyrrole Pyrrolidone 1.087Kg is placed in ball mill, is subsequently adding deionized water 1093 kilograms and carries out ball milling, ball Time consuming is 3 hours, makes dispersed mixture (solid content is 10%)；To divide with membrane pump the most again Scattered mixture is squeezed in a mixing bowl of sand mill and is carried out Ultrafine Grinding, high speed sand milling 6h, makes the granularity control of material System, between 500-800nm, prepares slurry.(calculate according to the consumption of lithium source, titanium source and phosphorus source, phosphorus The theoretical growing amount of acid titanium lithium is 226.9mol, 88.0Kg.)
Being placed in spray dryer by gained slurry and carry out mist projection granulating, holding inlet temperature is 350-400 DEG C, outlet temperature is 90 DEG C, obtains presoma at the beginning of 108 kilograms.Again by before at the beginning of 108 kilograms Drive body and be placed in VCH type high-speed mixer together with 3 kilograms of succinic acid, 2Kg stearic acid, 2Kg sucrose Inside carrying out mix homogeneously, incorporation time is 2h, obtains mixing presoma.
Then, then by mixing presoma it is placed in the kiln of nitrogen atmosphere sintering, with 2-10 DEG C/min Programming rate heat up, at 800 DEG C sinter 20h, then make material naturally cool to room temperature.Finally Pulverize gained material after sintering, obtain titanium phosphate lithium titanate cathode material.
The titanium phosphate lithium titanate cathode material preparing the present embodiment carries out charge-discharge test, half-cell test condition Identical with the half-cell test condition in embodiment 1.
In titanium phosphate lithium titanate cathode material prepared by the present embodiment, carbon content is 4.91%, half-cell capacity 0.2C It is 116.2mAh/g for 121.5mAh/g, 1C.
In other embodiments, lithium source used can also is that lithium carbonate, lithium dihydrogen phosphate and hydrogen-oxygen Change one or more in lithium；Titanium source used can also be titanium phosphate or titanium dioxide and titanium phosphate Mixture；Phosphorus source used can also is that the one in ammonium dihydrogen phosphate, phosphoric acid and lithium dihydrogen phosphate Or it is several；A used carbon source can also is that maltodextrin, betacyclodextrin, phenolic resin, One or more in polyvinylpyrrolidone, Polyethylene Glycol and carbon black；Secondary carbon source used is also Can be at least one in glucose, sucrose, succinic acid and stearic acid or several.
The above only further illustrates the technology contents of the present invention with embodiment, in order to reader more holds Readily understood, but do not represent embodiments of the present invention and be only limitted to this, any technology done according to the present invention is prolonged Stretch or recreate, all being protected by the present invention.

Claims (10)

1. the preparation method of a titanium phosphate lithium titanate cathode material, it is characterised in that comprise the following steps:
S1 disperses: lithium source, titanium source, phosphorus source, a carbon source and dispersant is uniform, and The granularity controlling material is 500-800nm, obtains slurry；The solid content of described slurry is 10-50%； In described slurry, the mol ratio of lithium, titanium and phosphorus is 1-1.05:2:3；
S2 is spray-dried: slurry is placed in drying-granulating in spray dryer, obtains just presoma； The inlet temperature of described spray dryer is 200-400 DEG C, and outlet temperature is 90-150 DEG C；
Bis-mixing of S3: first presoma is placed in mixer with secondary carbon source and mixes 2-4h, Mixing presoma；
A described carbon source forms carbon source with secondary carbon source, and the quality of described carbon source is titanium phosphate lithium reason The 1-10% of opinion growing amount；A described carbon source is 0.1-10 with the mass ratio of secondary carbon source；
S4 sinters: is placed in by mixing presoma in having the kiln of protective atmosphere and is sintered, Making material be cooled to room temperature after terminating, comminuting matter obtains titanium phosphate lithium titanate cathode material.
The preparation method of a kind of titanium phosphate lithium titanate cathode material, its feature exists In, in step S1, lithium source, titanium source, phosphorus source, a carbon source and dispersant are placed in ball mill In, ball milling 3-10h, obtain dispersed mixture；The most again dispersed mixture is placed in sand mill, Sand milling 1-6h is 500-800nm to the granularity of material, obtains slurry.
The preparation method of a kind of titanium phosphate lithium titanate cathode material, its feature exists In, in step S4, during sintering, heat up, at 800-1000 DEG C with the speed of 2-10 DEG C/min Lower sintering 8-20h, then naturally cools to room temperature.
The preparation method of a kind of titanium phosphate lithium titanate cathode material, its feature exists In, in step S4, described protective atmosphere is nitrogen or argon.
5. according to the preparation method of titanium phosphate lithium titanate cathode material a kind of described in any one of claim 1-4, It is characterized in that, described lithium source is at least one in lithium carbonate, lithium dihydrogen phosphate and Lithium hydrate.
6. according to the preparation method of titanium phosphate lithium titanate cathode material a kind of described in any one of claim 1-4, It is characterized in that, described titanium source is titanium dioxide and/or titanium phosphate.
7. according to the preparation method of titanium phosphate lithium titanate cathode material a kind of described in any one of claim 1-4, It is characterized in that, phosphorus source is at least one in ammonium dihydrogen phosphate, phosphoric acid and lithium dihydrogen phosphate.
8. according to the preparation method of titanium phosphate lithium titanate cathode material a kind of described in any one of claim 1-4, It is characterized in that, a described carbon source is maltodextrin, betacyclodextrin, phenolic resin, poly-second At least one in alkene pyrrolidone, Polyethylene Glycol and carbon black.
9. according to the preparation method of titanium phosphate lithium titanate cathode material a kind of described in any one of claim 1-4, It is characterized in that, described secondary carbon source be in glucose, sucrose, succinic acid and stearic acid at least A kind of.
10. according to the preparation method of titanium phosphate lithium titanate cathode material a kind of described in any one of claim 1-4, It is characterized in that, described dispersant is deionized water.
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CN107658458A (en) * 2017-10-10 2018-02-02 合肥国轩高科动力能源有限公司 A kind of preparation method of polypyrrole cladding titanium phosphate lithium titanate cathode material
CN107910514A (en) * 2017-11-06 2018-04-13 中国人民解放军63971部队 A kind of preparation method of nitrogen-doped carbon cladding double-core shell titanium phosphate lithium or titanium phosphate sodium
CN110137482A (en) * 2019-06-17 2019-08-16 桑顿新能源科技(长沙)有限公司 Carbon coating negative electrode material and preparation method thereof and battery
CN111477863A (en) * 2020-05-15 2020-07-31 宁波锋成纳米科技有限公司 Graphene/lithium titanium phosphate composite material, preparation method thereof and lithium ion battery
CN111755694A (en) * 2020-06-15 2020-10-09 宁波锋成先进能源材料研究院 Titanium phosphate composite material and preparation method and application thereof
CN111816873A (en) * 2020-06-23 2020-10-23 江苏理工学院 Carbon-coated lithium manganese titanium phosphate composite material, preparation method thereof and application thereof in lithium ion battery
CN113086960A (en) * 2021-03-26 2021-07-09 深圳市鹏冠新材料科技有限公司 Preparation method of lithium titanium phosphate cathode material
CN113697789A (en) * 2021-08-27 2021-11-26 江苏理工学院 Carbon-coated sodium titanium phosphate composite material and preparation method of negative electrode plate

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CN104779392A (en) * 2015-04-14 2015-07-15 淄博蓝印化工有限公司 Titanium phosphate lithium doped lithium titanate electrode material and manufacturing method thereof

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Publication number Priority date Publication date Assignee Title
CN107658458A (en) * 2017-10-10 2018-02-02 合肥国轩高科动力能源有限公司 A kind of preparation method of polypyrrole cladding titanium phosphate lithium titanate cathode material
CN107910514A (en) * 2017-11-06 2018-04-13 中国人民解放军63971部队 A kind of preparation method of nitrogen-doped carbon cladding double-core shell titanium phosphate lithium or titanium phosphate sodium
CN110137482A (en) * 2019-06-17 2019-08-16 桑顿新能源科技(长沙)有限公司 Carbon coating negative electrode material and preparation method thereof and battery
CN110137482B (en) * 2019-06-17 2021-02-19 桑顿新能源科技(长沙)有限公司 Carbon-coated negative electrode material, preparation method thereof and battery
CN111477863A (en) * 2020-05-15 2020-07-31 宁波锋成纳米科技有限公司 Graphene/lithium titanium phosphate composite material, preparation method thereof and lithium ion battery
CN111477863B (en) * 2020-05-15 2021-09-03 宁波锋成纳米科技有限公司 Graphene/lithium titanium phosphate composite material, preparation method thereof and lithium ion battery
CN111755694A (en) * 2020-06-15 2020-10-09 宁波锋成先进能源材料研究院 Titanium phosphate composite material and preparation method and application thereof
CN111755694B (en) * 2020-06-15 2022-04-01 宁波锋成先进能源材料研究院 Titanium phosphate composite material and preparation method and application thereof
CN111816873A (en) * 2020-06-23 2020-10-23 江苏理工学院 Carbon-coated lithium manganese titanium phosphate composite material, preparation method thereof and application thereof in lithium ion battery
CN113086960A (en) * 2021-03-26 2021-07-09 深圳市鹏冠新材料科技有限公司 Preparation method of lithium titanium phosphate cathode material
CN113697789A (en) * 2021-08-27 2021-11-26 江苏理工学院 Carbon-coated sodium titanium phosphate composite material and preparation method of negative electrode plate

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