CN105489874A - Stannic oxide nanoparticles with high electrical property and preparation method therefor - Google Patents
Stannic oxide nanoparticles with high electrical property and preparation method therefor Download PDFInfo
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- CN105489874A CN105489874A CN201410475958.6A CN201410475958A CN105489874A CN 105489874 A CN105489874 A CN 105489874A CN 201410475958 A CN201410475958 A CN 201410475958A CN 105489874 A CN105489874 A CN 105489874A
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Abstract
The invention relates to stannic oxide nanoparticles with high electrical property and a preparation method therefor. The preparation method comprises the following steps of 1) taking tin salt as the raw material, taking sodium, and micro particles that are soluble under an alkali condition as a template material, and dispersing the raw material and the template material into water and uniformly preparing into a mixed solution; 2) stirring the mixed solution at the room temperature for 6-24h and performing solid-liquid separation; 3) heating the solid obtained in the step 2) at a temperature of 400-700 DEG C for 2-8h; and 4) putting the powder obtained in the step 3) into an alkali solution to be fully reacted to remove the template material, then performing solid-liquid separation, and drying the obtained solid to obtain the stannic oxide nanoparticles with high electrical property.
Description
Technical field
The present invention relates to a kind of high electric property SnO
2nano particle and preparation method thereof, and the application in lithium ion battery, belong to nano-functional material field.
Background technology
The fast development of novel high-energy power technology, has higher requirement to lithium ion battery electrode material.Have high-energy-density, high power density, good charge/discharge cycle characteristics lithium ion battery electrode material be the emphasis that scientists is studied at present.At present, material with carbon element (Graphene, amorphous carbon etc.) is the main negative material of business-like lithium ion battery.But the storage lithium ability of material with carbon element lower (Graphene theoretical capacity 372mAh/g), limits the further raising of capacity of lithium ion battery.Tin ash (SnO
2) as the negative material of lithium ion battery, its theoretical capacity is 790mAh/g, much larger than the theoretical capacity of Graphene.Therefore, SnO
2be considered to one of ion cathode material lithium of current most Commercial Prospect.But due to change in volume huge in charge and discharge process, the efflorescence of stannic oxide electrode material can be caused, due to being separated of active material and flow collection sheet, its capacity can sharply decline, and cycle performance of battery is also deteriorated; In addition, the first charge-discharge efficiency of stannic oxide electrode material is very low, and these all limit its commercial applications as lithium ion battery negative material.
At present, SnO is improved
2the method of lithium ion battery negative material has general three kinds, and one is preparation SnO
2with the composite material of other material, as C (CrystEngComm, 2014,16,517) (after 30 times, battery special capacity fade is 515mAh/g), Fe
2o
3(AdvancedFunctionalMaterial, 2011,21,385) (after 30 times, battery special capacity fade is 200mAh/g) etc.This preparation method, preparation process is loaded down with trivial details, and condition is harsh, but no matter is to SnO
2battery capacity or cycle efficieny, its performance improve all very limited, the level of industrial applications can not be reached; Another kind method is preparation SnO
2hollow-core construction (small2010,6,296), although specific area increases, after its circulation 30 times, battery specific capacity just decays to and only has 351mAh/g.A kind of method is also had to be by preparing nano level SnO
2, prepare SnO at present
2method mostly concentrate on hydro thermal method preparation, 201210448234.3), N-methylimidazole (Nanoscale need to add 1B (application number: 200910084901.2) poly-diethanol monomethyl ether (application number:, 2013,5,3262) (first charge-discharge specific capacity is 1898 and 1241mAh/g, after 60 times, battery special capacity fade is 718mAh/g) etc. end-capping reagent, prepare the SnO of nano-grade size
2material, can find out, SnO
2quantum dot has remarkable result for its cycle performance of battery of raising and battery capacity, but its cycle performance of battery and battery capacity still can not meet industrial applications demand.
Nano material is because specific area is large, specific surface energy high makes nano tin dioxide material all have important application in gas sensor, solar cell, transparency conductive electrode etc.And to synthesize diameter be that the inorganic oxide nanoparticles of below 10nm is still an important technological challenge.Therefore, no matter synthesize small size tin dioxide nano-particle in academic research or application aspect, equal tool has very important significance.
Summary of the invention
The stability of quantum dot, dispersiveness, size and degree of crystallinity have important impact to its photocatalysis performance, the object of this invention is to provide a kind of can be used as lithium ion battery negative material there is higher stability, good dispersion and undersized tin dioxide quantal-point and its preparation method and application, it has efficiently, the battery performance of height ratio capacity and high cycle performance.
At this, on the one hand, the invention provides a kind of preparation method of high electric property tin oxide nano particles, comprise the following steps:
1) take pink salt as raw material, solvablely under alkali condition to receive, microparticle is mould material, both is scattered in water, prepares uniform mixed solution, wherein the concentration range of pink salt is 0.1 ~ 5mmol/40ml, and the concentration range of mould material is 0.1 ~ 5mmol/40ml;
2) by step 1) mixed solution of gained is in stirring at room temperature Separation of Solid and Liquid after 6 ~ 24 hours;
3) by step 2) heating 2 ~ 8 hours at the temperature of 400 ~ 700 DEG C (being preferably 450 ~ 600 DEG C) of the solid of gained;
4) by step 3) powder of gained in be placed in alkaline solution fully reaction to remove described mould material, after Separation of Solid and Liquid, gained solid is dried i.e. obtained described high electric property tin oxide nano particles.
The present invention controls crystalline size without the need to adopting any organic reagent, template only need be adopted to suppress crystal growth, and template is easy to remove, and in removal process, tin oxide nano particles is not had an impact, thus preparation has the tin oxide nano particles of very small dimensions.The method is simple, and method repeatability is high, and product batches is good.Be applicable to a large amount of production.And, SnO prepared by the present invention
2after quantum dot is prepared at normal temperatures, only need to calcine at a lower temperature, consume energy extremely low, reduce industrialization cost.
Preferably, step 1) in, described pink salt is at least one in stannic chloride pentahydrate, anhydrous stannic chloride, stannous chloride and anhydrous stannous chloride.
Preferably, step 1) in, described mould material is silicon dioxide and/or alumina particle, and the particle size of described mould material is 5nm ~ 50 μm.
Preferably, step 1) in, described mould material has meso-hole structure.
Preferably, step 1) in, in described mixed solution, the mol ratio of pink salt and mould material is 1:(0.5 ~ 10).
Preferably, step 3) in, described temperature is 400 ~ 600 DEG C.
Preferably, step 4) in, described alkaline solution is the NaOH aqueous solution of 0.1 ~ 2mol/L, and described abundant reaction is stirred 12 ~ 36 hours at 40 ~ 60 DEG C.
On the other hand, the invention provides the high electric property tin oxide nano particles prepared by above-mentioned preparation method, the quantum dot size of described tin oxide nano particles is 2 ~ 4nm.
Tin oxide nano particles of the present invention has minimum size, and there is higher stability, good dispersion, therefore, when it can be used as negative material for lithium ion battery, the performance that this lithium ion battery is very superior can be made, such as, there is high first charge-discharge specific capacity, excellent charge-discharge performance and doubly forthright charge-discharge performance.
The lithium ion battery made as the negative material of lithium ion battery by described high electric property tin oxide nano particles is when current density is 160mA/g, and after 200 circulations, charge and discharge specific capacity is kept above 800mAh/g respectively; When current density is 800mA/g, charge and discharge specific capacity is kept above 735mAh/g respectively; When current density is 1600mA/g, charge and discharge specific capacity maintains 650mAh/g respectively; When current density is 3200mA/g, charge and discharge specific capacity maintains 555mAh/g respectively.
The present invention controls crystalline size without the need to adopting any organic reagent, and template only need be adopted to suppress crystal growth, thus prepare the tin oxide nano particles that quantum dot size is 2 ~ 4nm, the method is simple, and energy consumption is low, and raw material are cheap, is applicable to large-scale production.
Accompanying drawing explanation
Fig. 1 is tin dioxide quantal-point XRD collection of illustrative plates prepared by embodiment 1;
Fig. 2 (a) is tin dioxide quantal-point transmission electron microscope photo, and wherein illustration is diffraction picture;
Fig. 2 (b) is tin dioxide quantal-point transmission electron microscope high-resolution photo;
Fig. 3 is the charge and discharge cycles curve chart of lithium ion battery prepared by the lithium ion battery negative material of tin dioxide quantal-point;
Fig. 4 is the charge-discharge magnification cyclic curve figure of lithium ion battery prepared by the lithium ion battery negative material of tin dioxide quantal-point.
Embodiment
Further illustrate the present invention below in conjunction with accompanying drawing and following execution mode, should be understood that accompanying drawing and following execution mode are only for illustration of the present invention, and unrestricted the present invention.
The invention provides a kind of high electric property tin oxide nano particles.Fig. 1 illustrates the tin dioxide quantal-point XRD collection of illustrative plates of the present invention's example, and as shown in Figure 1, tin oxide nano particles of the present invention is the SnO of pure phase
2.
Fig. 2 (a) is the tin dioxide quantal-point transmission electron microscope photo of the present invention's example, wherein illustration is diffraction picture, Fig. 2 (b) illustrates this tin dioxide quantal-point transmission electron microscope high-resolution photo, from Fig. 2 (a), Fig. 2 (b), tin oxide nano particles of the present invention is of a size of 2 ~ 4nm, and granular size is more homogeneous, distribution of sizes is narrower, and has good dispersiveness.
Tin oxide nano particles of the present invention can be by using solvablely under the pink salt as raw material and the alkali condition as mould material receiving, the mixture of microparticle in 400 ~ 700 DEG C of heating after 2 ~ 8 hours, in alkaline solution fully reaction to remove described mould material and obtained.The tin oxide nano particles obtained by the method can have small size, high stability and good dispersiveness.
Specifically, the preparation method of tin oxide nano particles of the present invention can be using the receiving of meso-hole structure consoluetly can be had under alkali condition, microparticle material configures deionized water solution by a certain percentage as mould material and pink salt, at room temperature react a period of time, then centrifugation, dry and calcine a few hours in air atmosphere at a certain temperature, remove mould material with certain density NaOH again, obtain tin oxide nano particles, size is less than 5nm.
More specifically, exemplarily, preparation method of the present invention can comprise the following steps.
1) take pink salt as raw material, solvablely under alkali condition to receive, mixed solution that microparticle is mould material, both preparations, wherein the concentration range of pink salt can be 0.1 ~ 5mmol/40ml, and the concentration range of mould material can be 0.1 ~ 5mmol/40ml.
Wherein pink salt includes but not limited to stannic chloride pentahydrate (SnCl
45H
2o), anhydrous stannic chloride, stannous chloride (SnCl
22H
2o) or anhydrous stannous chloride etc., preferred SnCl
45H
2o and SnCl
4.
Solvablely under alkali condition to receive, the material (mould material) of microparticle includes but not limited to silicon dioxide (SiO
2) and/or aluminium oxide (Al
2o
3) particle, its particle size can in 5nm ~ 50 μm, and structure comprises various irregular full particle and hollow-core construction.Again, this mould material preferably has meso-hole structure.In addition, mould material can adopt existing method to prepare, such as can see the preparation method of hollow mesopore silicon oxide spheres disclosed in Chinese patent CN103833040A.
Solvent in described mixed solution can be water, is preferably deionized water.
In addition, in mixed solution, the mol ratio of pink salt and mould material can be 1:(0.5 ~ 10).
2) by step 1) mixed solution of gained is such as, in stirring at room temperature Separation of Solid and Liquid, centrifugation after 6 ~ 24 hours.
3) by step 2) solid dispersal of gained in water, heat 2 ~ 8 hours at the temperature of 400 ~ 700 DEG C.Wherein heating-up temperature is preferably 450 ~ 600 DEG C.Owing to calcining at a lower temperature, therefore consume energy extremely low, reduce industrialization cost.
4) by step 3) powder of gained in be placed in alkaline solution fully reaction to remove described mould material, after Separation of Solid and Liquid, gained solid is dried i.e. obtained described high electric property tin oxide nano particles.Described Separation of Solid and Liquid is such as centrifugation.Can also to be separated solids wash after separation.Described furnace drying method is not limit, be such as in baking oven 70 degrees Celsius dry 24 hours.In one example, described alkaline solution is the NaOH aqueous solution of 0.1 ~ 2mol/L, and described abundant reaction is stirred 12 ~ 36 hours at 40 ~ 60 DEG C.
Fig. 1 is prepared according to the methods of the invention SnO
2the XRD collection of illustrative plates of quantum dot, with SnO
2standard card (JCPDS:41-1445) fit like a glove, illustrate that product is pure SnO
2.Fig. 2 (a) is prepared according to the methods of the invention SnO
2the transmission electron microscope photo of quantum dot and electron diffraction pattern, Fig. 2 (b) is its transmission electron microscope high-resolution picture.The SnO of 2.5 ~ 3.9nm of preparation is found out from Fig. 2 (a), 2 (b)
2nano particle.
In the present invention, without the need to adopting any organic reagent to control crystalline size, template only need be adopted to suppress crystal growth, thus prepare tin oxide nano particles, the method is simple, and energy consumption is low, and raw material are cheap, is applicable to large-scale production.
Tin oxide nano particles of the present invention can be used as the negative material of lithium ion battery.Such as, by the following method tin oxide nano particles of the present invention can be assembled into lithium ion battery, and test its battery performance.
1) by the SnO of preparation
2quantum dot lithium ion battery negative material is as electrode active material, mix with binding agent polyvinylidene fluoride (PVDF) and the black mass ratio by 80:10:10 of conductive acetylene, obtain compound, add appropriate amount of deionized water and stir into slurry, evenly be coated in aluminium foil surface with coating machine, then pole piece dried 24h at 85 DEG C.Divide the negative plate cutting into lithium ion battery.
2) negative plate of the lithium ion battery of preparation is assembled into lithium ion half-cell and carries out Performance Detection, as the negative pole of lithium ion battery, metal Li sheet is as positive pole.Electrolyte is the LiPF containing 1mol/L
6dEC (carbonic acid diethyl ester)+EC (ethylene carbonate) (volume ratio Dec:Ec=7:3), barrier film polypropylene Celgard2300.Battery assembling process is omnidistance to be completed in vacuum hand behaviour case.The battery assembled carries out constant current charge-discharge test after placing 12h, charging/discharging voltage is 0.2 ~ 2V, at ambient temperature is 25 DEG C ± 2 DEG C, current density is carry out constant current charge-discharge loop test under 160mA/g (multiplying power: 0.2C), measures tin dioxide quantal-point prepares lithium ion battery reversible capacity and charge-discharge performance as electrode active material.Doubly forthright charge and discharge cycles test, be 80mAh/g in current density respectively, 400mAh/g, 800mAh/g, 1600mAh/g, carry out charge and discharge cycles test under 3200mAh/g, test tin dioxide quantal-point prepares reversible capacity and the doubly forthright charge and discharge cycles test of lithium ion battery as electrode active material.
Fig. 3 illustrates the charge and discharge cycles curve chart of the lithium ion battery prepared by the lithium ion battery negative material of tin dioxide quantal-point of the present invention, and as shown in Figure 3, the first charge-discharge specific capacity of this lithium ion battery is high, is 1338 and 2560mAh/g; And be 160mA/g (0.2C) in current density, circulate after 200 times, the charging and discharging capacity of this lithium ion battery still maintains 809.5 and 816.6mAh/g, far above its theoretical capacity 790mAh/g.It can thus be appreciated that, using tin oxide nano particles of the present invention as the lithium ion battery of negative material, there is excellent first charge-discharge specific capacity and charge-discharge performance.
Fig. 4 illustrates the charge-discharge magnification cyclic curve figure of the lithium ion battery prepared by the lithium ion battery negative material of tin dioxide quantal-point of the present invention, as shown in Figure 4, when current density is 800mA/g, charge and discharge specific capacity maintains 737.7 and 740mAh/g respectively, when current density is 1600mA/g, charge and discharge specific capacity maintains 651.7 and 671.7mAh/g respectively, and when current density is 3200mA/g, charge and discharge specific capacity maintains 557.3 and 557.3mAh/g respectively.It can thus be appreciated that, using tin oxide nano particles of the present invention as the lithium ion battery of negative material, there is excellent doubly forthright charge-discharge performance.
Compared to prior art, the present invention has following advantage:
1) tin oxide nano particles of the present invention has minimum quantum dot size, and has high electric property;
2) preparation method of the present invention is simple, easy, and method repeatability is high, and product batches is good.Be applicable to a large amount of production;
3) SnO for preparing of the present invention
2after quantum dot is prepared at normal temperatures, only need to calcine 2 ~ 8h under 400 ~ 600 DEG C of low temperature, consume energy extremely low, reduce industrialization cost;
4) SnO for preparing of the present invention
2battery prepared by quantum dot, its battery performance is very superior.First charge-discharge specific capacity is high, and 1338 and 2560mAh/g.Charge-discharge performance is good: when current density is 160mA/g, after 200 circulations, charge and discharge specific capacity maintains 809.5 and 816.6mAh/g respectively, far above its theoretical capacity 790mAh/g, doubly forthright charge-discharge performance is good: when current density is 800mA/g, charge and discharge specific capacity maintains 737.7 and 740mAh/g respectively, when current density is 1600mA/g, charge and discharge specific capacity maintains 651.7 and 671.7mAh/g respectively, when current density is 3200mA/g, charge and discharge specific capacity maintains 557.3 and 557.3mAh/g respectively.
Exemplify embodiment below further to describe the present invention in detail.Should understand equally; following examples are only used to further illustrate the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art's foregoing according to the present invention is made and adjustment all belong to protection scope of the present invention.The technological parameter etc. that following example is concrete is also only an example in OK range, and namely those skilled in the art can be done in suitable scope by explanation herein and select, and do not really want the concrete numerical value being defined in Examples below.
Embodiment 1
1) with stannic chloride pentahydrate (SnCl
45H
2o) for raw material, Silica Nanotube, (preparation method is see patent, application number: CN101280457A) be mould material, mixed solution at room temperature both preparation, wherein the concentration of stannic chloride pentahydrate is 0.5mmol/40ml, and Silica Nanotube concentration is 1mmol/40ml;
2) by 1) described mixed solution stirring at room temperature 12 hours;
3) by step 2) mixed solution centrifugation, and gained material to be scattered in deionized water again, to be positioned in stove, 450 DEG C of heating temperatures 7 hours;
4) by step 3) powder prepared is placed in the NaOH solution that 50ml concentration is 0.1mol/L, and temperature is 50 DEG C, stirs 24 hours.Centrifugation, collect sample, and in baking oven 70 degrees Celsius dry 24 hours.Obtain tin dioxide nano-particle.Described SnO
2quantum dot size is 2 ~ 4nm, good dispersion;
5) by the SnO of preparation
2quantum dot does lithium ion battery negative material, assembled battery, and tests its battery performance.
Fig. 1 is SnO
2the XRD collection of illustrative plates of quantum dot, with SnO
2standard card (JCPDS:41-1445) fit like a glove, illustrate that product is pure SnO
2.Fig. 2 (a) is SnO
2the transmission electron microscope photo of quantum dot and electron diffraction pattern, Fig. 2 (b) is its transmission electron microscope high-resolution picture.The SnO of 2.5 ~ 3.9nm of preparation is found out from Fig. 2 (a), 2 (b)
2nano particle.Fig. 3 is SnO
2the cycle performance of battery picture of lithium ion battery prepared by quantum dot lithium ion battery negative material.Be 160mA/g (0.2C) in current density, circulate after 200 times, this SnO
2the charging and discharging capacity of quantum dot still maintains 809.5 and 816.6mAh/g, far above its theoretical capacity 790mAh/g.Fig. 4 is SnO
2the doubly forthright charge and discharge cycles picture of lithium ion battery prepared by quantum dot lithium ion battery negative material.As can be seen from the figure doubly forthright charge-discharge performance is good for its high battery.Doubly forthright charge-discharge performance is good: when current density is 800mA/g, charge and discharge specific capacity maintains 737.7 and 740mAh/g respectively, when current density is 1600mA/g, charge and discharge specific capacity maintains 651.7 and 671.7mAh/g respectively, when current density is 3200mA/g, charge and discharge specific capacity maintains 557.3 and 557.3mAh/g respectively.
Embodiment 2
1) take anhydrous stannic chloride as raw material, (preparation method is see patent for hollow silica ball, application number: 201310190469.1) be mould material, mixed solution at room temperature both preparation, wherein the concentration of anhydrous stannic chloride is 1mmol/40ml, and Silica Nanotube concentration is 1mmol/40ml;
2) by 1) described mixed solution stirring at room temperature 18 hours;
3) by step 2) mixed solution centrifugation, and gained material to be scattered in deionized water again, to be positioned in stove, 550 DEG C of heating temperatures 5 hours;
4) by step 3) powder prepared is placed in the NaOH solution that 50ml concentration is 0.1mol/L, and temperature is 50 DEG C, stirs 24 hours.Centrifugation, collect sample, and in baking oven 70 degrees Celsius dry 24 hours.Obtain tin dioxide nano-particle.Described SnO
2quantum dot size is 2 ~ 4nm, good dispersion;
5) by the SnO of preparation
2quantum dot does lithium ion battery negative material, assembled battery, and tests its battery performance.Result shows that this battery has the performance of the excellence similar to the battery of embodiment 1.
Embodiment 3
1) with stannic chloride pentahydrate (SnCl
45H
2o) be raw material, (preparation method is see patent for hollow silica ball, application number: 201310190469.1) be mould material, mixed solution at room temperature both preparation, wherein the concentration of stannic chloride pentahydrate is 2.5mmol/40ml, and Silica Nanotube concentration is 2mmol/40ml;
2) by 1) described mixed solution stirring at room temperature 24 hours;
3) by step 2) mixed solution centrifugation, and gained material to be scattered in deionized water again, to be positioned in stove, 650 DEG C of heating temperatures 3 hours;
4) by step 3) powder prepared is placed in the NaOH solution that 50ml concentration is 0.1mol/L, and temperature is 50 DEG C, stirs 24 hours.Centrifugation, collect sample, and in baking oven 70 degrees Celsius dry 24 hours.Obtain tin dioxide nano-particle.Described SnO
2quantum dot size is 2 ~ 4nm, good dispersion;
5) by the SnO of preparation
2quantum dot does lithium ion battery negative material, assembled battery, and tests its battery performance.Result shows that this battery has the performance of the excellence similar to the battery of embodiment 1.
Industrial applicability:
Tin oxide nano particles of the present invention has minimum size, and has higher stability, good dispersion, and can be used as lithium ion battery negative material, preparation method of the present invention is simple, and energy consumption is low, and raw material are cheap, is applicable to large-scale production.
Claims (9)
1. a preparation method for high electric property tin oxide nano particles, is characterized in that, comprise the following steps:
1) take pink salt as raw material, solvablely under alkali condition to receive, microparticle is mould material, both is scattered in water, prepares uniform mixed solution, wherein the concentration range of pink salt is 0.1 ~ 5mmol/40ml, and the concentration range of mould material is 0.1 ~ 5mmol/40ml;
2) by the mixed solution of step 1) gained in stirring at room temperature Separation of Solid and Liquid after 6 ~ 24 hours;
3) by step 2) solid of gained heats 2 ~ 8 hours at the temperature of 400 ~ 700 DEG C;
4) powder of step 3) gained fully being reacted to remove described mould material in being placed in alkaline solution, after Separation of Solid and Liquid, gained solid being dried i.e. obtained described high electric property tin oxide nano particles.
2. preparation method according to claim 1, is characterized in that, in step 1), described pink salt is at least one in stannic chloride pentahydrate, anhydrous stannic chloride, stannous chloride and anhydrous stannous chloride.
3. preparation method according to claim 1 and 2, is characterized in that, in step 1), described mould material is silicon dioxide and/or alumina particle, and the particle size of described mould material is 5nm ~ 50 μm.
4. preparation method according to any one of claim 1 to 3, is characterized in that, in step 1), described mould material has meso-hole structure.
5. preparation method according to any one of claim 1 to 4, is characterized in that, in step 1), in described mixed solution, the mol ratio of pink salt and mould material is 1:(0.5 ~ 10).
6. preparation method according to any one of claim 1 to 5, is characterized in that, in step 3), described temperature is 400 ~ 600 DEG C.
7. preparation method according to any one of claim 1 to 6, is characterized in that, in step 4), described alkaline solution is the NaOH aqueous solution of 0.1 ~ 2mol/L, and described abundant reaction is stirred 12 ~ 36 hours at 30 ~ 60 DEG C.
8. the high electric property tin oxide nano particles that in claim 1 to 7 prepared by arbitrary described preparation method, is characterized in that, the quantum dot size of described tin oxide nano particles is 2 ~ 4nm.
9. the high electric property tin oxide nano particles according to Claim 8 described in item, it is characterized in that, the lithium ion battery made as the negative material of lithium ion battery by described high electric property tin oxide nano particles is when current density is 160mA/g, after 200 circulations, charge and discharge specific capacity is kept above 800mAh/g respectively; When current density is 800mA/g, charge and discharge specific capacity is kept above 735mAh/g respectively; When current density is 1600mA/g, charge and discharge specific capacity maintains 650mAh/g respectively; When current density is 3200mA/g, charge and discharge specific capacity maintains 555mAh/g respectively.
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| CN107138147A (en) * | 2017-04-18 | 2017-09-08 | 南昌大学 | The method that high-ratio surface tin ash catalyst is prepared by hard template of mesoporous silicon oxide |
| CN107689444A (en) * | 2017-04-14 | 2018-02-13 | 北京航空航天大学 | A kind of electrode material of lithium ion battery |
| CN108682801A (en) * | 2018-04-25 | 2018-10-19 | 福建翔丰华新能源材料有限公司 | A kind of preparation method of high-performance tinbase lithium ion battery negative material |
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| CN111785961A (en) * | 2020-06-02 | 2020-10-16 | 杭州电子科技大学 | Porous ferroferric oxide film/multilayer graphene composite material and preparation method thereof |
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| CN113675012A (en) * | 2021-08-20 | 2021-11-19 | 华侨大学 | Preparation method and application of oxygen vacancy-rich tin dioxide quantum dot/two-dimensional nano titanium carbide composite material |
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