CN109286000A - Lithium ion battery mixes anatase titania negative electrode material and preparation method thereof with molybdenum - Google Patents
Lithium ion battery mixes anatase titania negative electrode material and preparation method thereof with molybdenum Download PDFInfo
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- CN109286000A CN109286000A CN201811024033.4A CN201811024033A CN109286000A CN 109286000 A CN109286000 A CN 109286000A CN 201811024033 A CN201811024033 A CN 201811024033A CN 109286000 A CN109286000 A CN 109286000A
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- molybdenum
- negative electrode
- electrode material
- anatase titania
- lithium ion
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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
- H01M4/364—Composites as mixtures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention belongs to technical field of lithium ion, a kind of lithium ion battery is disclosed with molybdenum and mixes anatase titania negative electrode material and preparation method thereof.This method is that titanium source is added in solvent, adds the deionized water containing a certain amount of molybdenum source, after mixing to uniformly, carries out hydro-thermal reaction；After gained precipitation and separation, washing, drying, grinding, calcining obtains final product under high temperature.It takes and prepares the small molybdenum doping nanometer anatase titania of purity is high, particle size method of the invention, it is possible to simple, inexpensive.When being used as negative electrode material, good circulation and high rate performance are shown；Compared with undoped with sample, chemical property has obtained certain raising.
Description
Technical field
The present invention relates to a kind of lithium ion batteries to mix anatase titania negative electrode material and preparation method thereof with molybdenum, belongs to
Technical field of lithium ion.
Background technique
Why lithium ion battery is popularized, and is because having many advantages, such as excellent cycle performance and high-energy density.
For now, graphite is still the primary raw material of commercial li-ion cell negative electrode material.However, while having the advantage that,
It also has certain defect.For example, with Li in charge and discharge process+Insertion and abjection, can graphite surface formed Li dendrite,
Accumulation can pierce through diaphragm, cause internal short-circuit of battery for a long time, and there are security risks.
Titanium dioxide (TiO2) gather around there are four types of common crystal form: brockite, anatase, rutile and TiO2- B, and all contain
TiO6It is octahedra.Wherein, anatase TiO2It is the known insertion to lithium ion and the most electroactive structure of abjection.Meanwhile it discharging
~ 1.75V, charging ~ 2V high working voltage platform will not generate Li dendrite and solid electrolyte interface (SEI) film on its surface,
And it is at low cost, environmental-friendly, it can be used as the candidate material of graphite.In addition, TiO2Volume change in charge and discharge process
Only about 4%, i.e. Li+The volume change very little caused by the insertion and abjection of material internal, cycle performance are excellent.However, and stone
Ink is compared, theoretical capacity low (335mAh/g, every 1molTiO2It is embedded in 1molLi+).
Studies have shown that in Li+Anatase TiO in telescopiny, in material2Main body (crystallite) is mutually spontaneous to be separated into rich lithium
Phase and poor lithium phase.Biphase equilibrium maintains always, until Li+Insertion is completed, and all poor lithium phase transition are rich lithium phase；Li+Abjection
Behavior is also identical.Recyclable Li in the process+About 0.5mol.Therefore, anatase TiO2It is lower that corresponding reality is recycled capacity
(only 167.5mAh/g), and have lower electric conductivity and Li+Diffusion coefficient.
The particle size for reducing material, can be such that its chemical property is improved.The characteristics of nano material is that size is small
And large specific surface area, Li can be shortened as electrode material+Diffusion path, come into full contact with electrolyte, finally play more excellent
Chemical property.In addition, choosing suitable transition metal element to anatase TiO2It is doped modification, it can be in certain journey
Improve its chemical property on degree.
Summary of the invention
The purpose of the present invention is provide a kind of molybdenum doping nanometer anatase titania lithium with simple, inexpensive approach
Ion battery negative electrode material and preparation method thereof.By the doping of molybdenum element, make the reversible appearance of anatase titania material
Raising to a certain extent is measured, while improving its chemical property.
Technical solution according to the invention, the lithium ion battery mix the preparation of anatase titania negative electrode material with molybdenum
Method, comprising the following steps:
(1) solvent is placed in a beaker, under the conditions of magnetic agitation, titanium source is added, obtains solution 1；
(2) molybdenum source is dissolved in deionized water, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 25-35min；
(4) mixed solution obtained in (3) is transferred in the stainless steel hydrothermal reaction kettle of polytetrafluoroethyllining lining, is placed in baking oven
Middle carry out hydro-thermal reaction；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 70-90 °C of dry 10-14h；
(6) it after grinding product, is placed in Muffle furnace, carries out high temperature in air atmosphere with the heating rate of 3-6 °C/min and forge
It burns, final product, i.e. molybdenum doping nanometer anatase titania is obtained after being cooled to room temperature.
Further, the titanium source in the step (1) is tetra-n-butyl titanate, and solvent is dehydrated alcohol, titanium source and solvent
Volume ratio is 1:4-6.
Further, the molybdenum source in the step (2) is seven Ammonium paramolybdate tetrahydrates, and dosage is Mo:Ti=0.01-0.05.
Further, the volume ratio of the titanium source and deionized water is 1:0.8-1.2.
Further, hydrothermal reaction condition is 110-130 °C, 10-14h in the step (4).
Further, the calcination temperature in the step (6) be 400-500 °C, time 3-5h.
It above-mentioned state molybdenum made from preparation method it is another object of the present invention to provide a kind of and mixes anatase titanium dioxide
Titanium negative electrode material.
The beneficial effects of the present invention are:
(1) material prepared possesses anatase TiO2The space I41/amd group structure, be introduced into molybdenum element and do not cause but into material
Its structure change is provided simultaneously with the graininess pattern of Nano grade；
(2) the molybdenum doping anatase TiO prepared2Material shows improved chemical property in testing, and reversible capacity obtains
Certain raising；
(3) preparation method is easy to operate, nontoxic, environmental-friendly, at low cost.
Detailed description of the invention
Fig. 1 is molybdenum doping anatase TiO2The XRD diagram of material.
Fig. 2 is molybdenum doping anatase TiO2The SEM of material schemes.
Fig. 3 is molybdenum doping anatase TiO2The cycle performance figure of material.
Fig. 4 is molybdenum doping anatase TiO2The high rate performance figure of material.
Specific embodiment
Below with reference to embodiment, technical scheme is described further.
Embodiment 1
(1) dehydrated alcohol of 50mL is measured first in beaker, under the conditions of magnetic agitation, is measured 10mL tetra-n-butyl titanate and is added
Wherein, solution 1 is obtained；
(2) deionized water that a certain amount of molybdenum source is dissolved in 10mL is weighed by Mo:Ti=0.01, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 30min；
(4) mixed solution obtained in (3) is then transferred to the stainless steel hydrothermal reaction kettle of 100mL polytetrafluoroethyllining lining
In, it is placed in baking oven and carries out hydro-thermal reaction, condition is 120 °C, 12h；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 80 °C of dry 12h；
(6) it after grinding product, is placed in Muffle furnace, high-temperature calcination is carried out in air atmosphere with the heating rate of 5 °C/min,
Condition is 450 °C, 4h.Final product, i.e. molybdenum doping nanometer anatase titania are obtained after being cooled to room temperature.
Embodiment 2
(1) dehydrated alcohol of 40mL is measured first in beaker, under the conditions of magnetic agitation, is measured 10mL tetra-n-butyl titanate and is added
Wherein, solution 1 is obtained；
(2) deionized water that a certain amount of molybdenum source is dissolved in 12mL is weighed by Mo:Ti=0.02, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 35min；
(4) mixed solution obtained in (3) is then transferred to the stainless steel hydrothermal reaction kettle of 100mL polytetrafluoroethyllining lining
In, it is placed in baking oven and carries out hydro-thermal reaction, condition is 110 °C, 10h；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 70 °C of dry 10h；
(6) it after grinding product, is placed in Muffle furnace, high-temperature calcination is carried out in air atmosphere with the heating rate of 5 °C/min,
Condition is 450 °C, 4h.Final product, i.e. molybdenum doping nanometer anatase titania are obtained after being cooled to room temperature.
Embodiment 3
(1) dehydrated alcohol of 45mL is measured first in beaker, under the conditions of magnetic agitation, is measured 10mL tetra-n-butyl titanate and is added
Wherein, solution 1 is obtained；
(2) deionized water that a certain amount of molybdenum source is dissolved in 10mL is weighed by Mo:Ti=0.03, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 25min；
(4) mixed solution obtained in (3) is then transferred to the stainless steel hydrothermal reaction kettle of 100mL polytetrafluoroethyllining lining
In, it is placed in baking oven and carries out hydro-thermal reaction, condition is 130 °C, 14h；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 90 °C of dry 12h；
(6) it after grinding product, is placed in Muffle furnace, high-temperature calcination is carried out in air atmosphere with the heating rate of 3 °C/min,
Condition is 400 °C, 5h.Final product, i.e. molybdenum doping nanometer anatase titania are obtained after being cooled to room temperature.
Embodiment 4
(1) dehydrated alcohol of 60mL is measured first in beaker, under the conditions of magnetic agitation, is measured 10mL tetra-n-butyl titanate and is added
Wherein, solution 1 is obtained；
(2) deionized water that a certain amount of molybdenum source is dissolved in 8mL is weighed by Mo:Ti=0.04, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 32min；
(4) mixed solution obtained in (3) is then transferred to the stainless steel hydrothermal reaction kettle of 100mL polytetrafluoroethyllining lining
In, it is placed in baking oven and carries out hydro-thermal reaction, condition is 120 °C, 13h；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 85 °C of dry 10h；
(6) it after grinding product, is placed in Muffle furnace, high-temperature calcination is carried out in air atmosphere with the heating rate of 6 °C/min,
Condition is 500 °C, 3h.Final product, i.e. molybdenum doping nanometer anatase titania are obtained after being cooled to room temperature.
Embodiment 5
(1) dehydrated alcohol of 55mL is measured first in beaker, under the conditions of magnetic agitation, is measured 10mL tetra-n-butyl titanate and is added
Wherein, solution 1 is obtained；
(2) deionized water that a certain amount of molybdenum source is dissolved in 10mL is weighed by Mo:Ti=0.05, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 28min；
(4) mixed solution obtained in (3) is then transferred to the stainless steel hydrothermal reaction kettle of 100mL polytetrafluoroethyllining lining
In, it is placed in baking oven and carries out hydro-thermal reaction, condition is 120 °C, 11h；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 80 °C of dry 14h；
(6) it after grinding product, is placed in Muffle furnace, high-temperature calcination is carried out in air atmosphere with the heating rate of 5 °C/min,
Condition is 470 °C, 4h.Final product, i.e. molybdenum doping nanometer anatase titania are obtained after being cooled to room temperature.
As seen from Figure 1, the material that embodiment 1 is prepared is anatase TiO2.Wider peak shape illustrates the crystal grain of material
Size is small.And the TiO without other impurity or other crystal forms2Peak appearance, the purity is high for illustrating prepared sample, molybdenum doping are not
The crystal structure of material is caused to change.
From Figure 2 it can be seen that the material that the present invention is prepared is in fine particle shape pattern, having a size of Nano grade and distribution ratio
It is more uniform；But there is certain agglomeration, little particle is gathered into biggish particle.
By molybdenum doping anatase TiO prepared by the present invention2Electrode slice is made in material, is assembled into button cell.In room temperature, electricity
Under conditions of pressing 1-3V and certain current density (1C=170mA/g), constant current charge-discharge test is carried out.Fig. 3 is cycle performance
Figure, it can be seen that the material has good cycle performance.Under the current density of 0.2C, reversible capacity can stablize ~
180mAh/g, and undoped with the corresponding reversible capacity of sample in ~ 160mAh/g.Fig. 4 is high rate performance figure, in the current density of 5C
Under, reversible capacity can be stablized in ~ 60mAh/g, and be only ~ 17mAh/g undoped with the corresponding reversible capacity of sample.Thus may be used
See, molybdenum doping can actually improve anatase TiO2The chemical property of material.
Claims (7)
1. the preparation method that lithium ion battery mixes anatase titania negative electrode material with molybdenum, which is characterized in that including following step
It is rapid:
(1) solvent is placed in a beaker, under the conditions of magnetic agitation, titanium source is added, obtains solution 1；
(2) molybdenum source is dissolved in deionized water, obtains solution 2；
(3) solution 2 is poured into solution 1, and continues to stir 25-35min；
(4) mixed solution obtained in (3) is transferred in the stainless steel hydrothermal reaction kettle of polytetrafluoroethyllining lining, is placed in baking oven
Middle carry out hydro-thermal reaction；
(5) after being cooled to room temperature, products therefrom is centrifuged, is washed, alcohol is washed and 70-90 °C of dry 10-14h；
(6) it after grinding product, is placed in Muffle furnace, carries out high temperature in air atmosphere with the heating rate of 3-6 °C/min and forge
It burns, final product, i.e. molybdenum doping nanometer anatase titania is obtained after being cooled to room temperature.
2. lithium ion battery as described in claim 1 mixes the preparation method of anatase titania negative electrode material with molybdenum, special
Sign is that the titanium source in the step (1) is tetra-n-butyl titanate, and solvent is dehydrated alcohol, and titanium source and solvent volume ratio are 1:
4-6。
3. lithium ion battery as described in claim 1 mixes the preparation method of anatase titania negative electrode material with molybdenum, special
Sign is that the molybdenum source in the step (2) is seven Ammonium paramolybdate tetrahydrates, and dosage is Mo:Ti=0.01-0.05.
4. lithium ion battery as described in claim 1 mixes the preparation method of anatase titania negative electrode material with molybdenum, special
Sign is that the volume ratio of the titanium source and deionized water is 1:0.8-1.2.
5. lithium ion battery as described in claim 1 mixes the preparation method of anatase titania negative electrode material with molybdenum, special
Sign is that hydrothermal reaction condition is 110-130 °C, 10-14h in the step (4).
6. lithium ion battery as described in claim 1 mixes the preparation method of anatase titania negative electrode material with molybdenum, special
Sign is, the calcination temperature in the step (6) is 400-500 °C, time 3-5h.
7. molybdenum made from the preparation method as described in claim 1-6 is any mixes anatase titania negative electrode material.
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| CN201811024033.4A CN109286000A (en) | 2018-09-04 | 2018-09-04 | Lithium ion battery mixes anatase titania negative electrode material and preparation method thereof with molybdenum |
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| CN201811024033.4A CN109286000A (en) | 2018-09-04 | 2018-09-04 | Lithium ion battery mixes anatase titania negative electrode material and preparation method thereof with molybdenum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113401936A (en) * | 2021-06-22 | 2021-09-17 | 广西大学 | Multi-element (C, N, S, P) doped titanium dioxide cathode material and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6350324A (en) * | 1986-08-19 | 1988-03-03 | Taiyo Yuden Co Ltd | Monocrystalline tio2 substance doped with mo and its production |
| CN101478035A (en) * | 2009-01-09 | 2009-07-08 | 中国科学院上海硅酸盐研究所 | Electrode material used for organic inorganic composite cell and manufacturing process |
-
2018
- 2018-09-04 CN CN201811024033.4A patent/CN109286000A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6350324A (en) * | 1986-08-19 | 1988-03-03 | Taiyo Yuden Co Ltd | Monocrystalline tio2 substance doped with mo and its production |
| CN101478035A (en) * | 2009-01-09 | 2009-07-08 | 中国科学院上海硅酸盐研究所 | Electrode material used for organic inorganic composite cell and manufacturing process |
Non-Patent Citations (4)
| Title |
|---|
| SUNG WOO OH等: "Hydrothermal synthesis of nano-sized anatase TiO2 powders for lithium secondary anode materials", 《JOURNAL OF POWER SOURCES》 * |
| TRANG VU THI等: "Effect of Mo6+ doping on electrochemical performance of anatase TiO2 as a high performance anode material for secondary lithium-ion batteries", 《JOURNAL OF ALLOYS AND COMPOUNDS》 * |
| 唐玉朝: "《TiO2光催化技术及其在环境领域的应用》", 31 March 2013 * |
| 汪洋: "《气体的吸附及薄膜材料的应用》", 31 December 2016 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113401936A (en) * | 2021-06-22 | 2021-09-17 | 广西大学 | Multi-element (C, N, S, P) doped titanium dioxide cathode material and preparation method thereof |
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