CN104393268B - The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge is modified - Google Patents
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge is modified Download PDFInfo
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- CN104393268B CN104393268B CN201410618731.2A CN201410618731A CN104393268B CN 104393268 B CN104393268 B CN 104393268B CN 201410618731 A CN201410618731 A CN 201410618731A CN 104393268 B CN104393268 B CN 104393268B
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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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- H—ELECTRICITY
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- 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
- H01M4/62—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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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
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- 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 preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge is modified comprises the steps: step 1: prepare SiO2 aerogel powder material；Step 2: with SnCl2·2H2O and SbCl3For Sn and Sb source, prepare SnCl2And SbCl3Solution, adds polyvinylpyrrolidone, stirs, obtain solution A；Step 3: preparation NaBH4Solution, and add NaOH, obtain B solution；Step 4: weigh CNT, is dissolved in B solution, ultrasonic wave dispersion 60min, weighs SiO2Aeroge, magnetic agitation 30min, obtain C solution；Step 5: solution A be added drop-wise in C solution, stirs 4h, then transfers to, in polytetrafluoroethyltank tank, obtain solution D by the solution obtained；Step 6: by solution D centrifugation, with deionized water and absolute ethanol washing, constant pressure and dry.Composite negative pole material capacity that the present invention obtains is high and good cycle, is a kind of preferably lithium ion battery negative material, has potential application foreground in fields such as portable electric appts, electric automobile and Aero-Space.
Description
Technical field
The present invention relates to lithium ion battery negative material field, be specifically related to a kind of aeroge/SnSb/ CNT composite negative pole material
The preparation method of material.
Background technology
Along with microelectric technique and the development of new-energy automobile, power supply proposing the highest requirement, lithium ion battery is by filling
The plurality of advantages such as electrical efficiency height and energy density height become focus of concern.Lithium ion battery mainly by positive pole, negative pole,
Barrier film, electrolyte form.Wherein, negative material primarily as storage lithium main body, realize in charge and discharge process lithium from
The embedding of son and abjection, be the key component of whole battery.Commercial Li-ion battery negative pole mainly uses various at present
Material with carbon element, the specific capacity of graphite-based carbon negative material the most closely its theoretical capacity (372mAh/g), become restriction lithium
The bottleneck of battery capacity, the space making its capacity of raising is very limited, find a kind of can substitute graphite-based carbon negative material,
The novel secondary lithium ion battery negative material with more high power capacity and security is urgent and necessary.
Alloy type negative material typically has higher specific capacity, typically such as the lithium alloy of Si, Ge, Sn and Pb etc.,
Wherein the theoretical specific capacity of metallic tin is 994mAh/g, and antimony is 660mAh/g, and silicon is 4200mAh/g, far above carbon
372mAh/g.Wherein Sn base alloy is with its high theoretical lithium storage content and of a relatively high security, causes the pole of people
Big concern, Sn base alloy is the height ratio capacity lithium ion battery negative material having very much commercial applications prospect.But, so far
The subject matter that Sn base alloy (Sn-Cu, Sn-Sb, Sn-Ca, Sn-Ag, Sn-V etc.) studied exists is to fill
With bigger Volume Changes in discharge process, structural breakdown and the powder phenomenon-tion of electrode material can be caused, be somebody's turn to do thus cause electricity
The internal resistance of pole increases suddenly, capacity rapid decrease, and cycle performance is deteriorated.
In order to alleviate the volumetric expansion in charging process of the SnSb alloy material, improve its cyclical stability, mainly have following several
Kind of method: the nanometer preparation of alloy and carrying out with material with carbon element is coated with, inlay and doping etc..
Jianyin Zhang etc. (Jianyin Zhang, et al.Electrochemistry Communications.2014,38 (1):
36-39.) with 1mol/L H2SO4For electrolyte, by SnO2-Sb2O3Use electrolytic reduction to synthesize porous Sn/SnSb to bear
Pole material, its initial charge capacity reaches 800mAh/g, and has preferable cyclical stability, holds after 40 circulations
Amount conservation rate is 70%.Juan Li et al. (Juan Li, et al.Electrochimica Acta.2013,113 (15): 505-513.)
The method using co-precipitation and pyrolysis has synthesized the nanometer SnSb/MCMB/ carbon composite with core shell structure, this composite wood
Material has preferable chemical property, and first charge-discharge efficiency is 83.52%, after 100 discharge and recharges, and circulation volume
Still it is up to 422.5mAh/g.(Peixin Zhang, the et al.Journal of Power Sources. such as Peixin Zhang
2013,233 (1): 166-173.) using chemical reduction method to synthesize SnSb-Ag/CNTs composite, composite has very
Good cycle performance, its 50 Posterior circle capacity are up to 639.6mAh/g.(Hailei Zhao, the et al.Journal such as Zhao Hailei
Of University of Science and Technology Beijing.2007,14 (4): 345-349.) use carbothermic method,
800 DEG C of synthesis SnSb alloys are for lithium cell cathode material, and first discharge specific capacity is more than 800mAh/g, after circulating 20 times
Still remain in more than 600mAh/g.Wachtler etc. (Wachtler M, et al.J.Power Sources, 2002,105
(2): 151-160.) it is prepared for nanocrystalline Sn by the method for chemistry of aqueous solution reduction2SnSb alloy, the capacity of 50 circulations is steady
It is scheduled between 500-600mAh/g.
Making a general survey of domestic and international patent and publish knowable to scientific paper, the research of current various SnSb alloy-based negative poles is that comparison is amassed
Pole, active, get a good chance of becoming a new generation's cathode material for high capacity lithium ion battery.Above-mentioned relate to various SnSb base lithium electricity
Although cathode of lithium battery cycle performance can be improved in pond, but increase rate is little.
The present invention utilizes high theoretical capacity and the security of SnSb alloy, as storage lithium main body, makes full use of SiO2Airsetting
The advantages such as the nanoporous of glue and specific surface height, do carrier for SnSb base alloy material, will have the SnSb of higher embedding lithium capacity
Alloy is pinned at SiO2Aeroge surface, forms core-shell structure SnSb/ aerogel composite, even eliminates SnSb to reduce
The alloy anode volumetric expansion in the charge and discharge process impact on lithium battery stability.But due to the SiO introduced2Aeroge
Electric conductivity is the best, introduces CNT, construct aeroge/SnSb/ CNT on the basis of SnSb/ aerogel composite
Three-dimensional structure, utilizes the one-dimensional loose structure of CNT both to contribute to the embedding of lithium ion in charge and discharge process and moved out, again
Can be that three-dimensional conductive network constructed by SnSb/ aeroge.Give full play to SiO2Aeroge, SnSb alloy and carbon nano-tube material
Cooperative effect, it is achieved have complementary advantages, to improve electrode cycle stability, and prepare the lithium ion of high power capacity high stability
Cell negative electrode material, and then improve the overall performance of power lithium-ion battery.
Summary of the invention
The technical problem to be solved in the present invention is: overcome current lithium cell cathode material to exist capacity is the highest and cycle performance not
Preferably problem, proposes the preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge is modified, and capacity is high and follows
Ring performance is good, is a kind of preferably lithium ion battery negative material, navigates in portable electric appts, electric automobile and aviation
It etc. field there is potential application foreground.
In order to solve above-mentioned technical problem, the present invention proposes techniques below scheme: the SnSb/ CNT that a kind of aeroge is modified
The preparation method of composite negative pole material, comprises the steps:
Step 1: with industrial waterglass or tetraethyl orthosilicate for silicon source, formamide and ethylene glycol as additive, acetic acid as catalyst,
Use sol-gel process and atmosphere pressure desiccation, prepare SiO2Aerogel powder material is stand-by；
Step 2: respectively with SnCl2·2H2O and SbCl3For Sn and Sb source, prepare certain density SnCl2And SbCl3
Solution, adds a certain amount of polyvinylpyrrolidone, then stirs, obtain solution A；
Step 3: prepare certain density NaBH4Solution, the pH value adding a certain amount of NaOH control solution is more than 12,
To prevent NaBH4Decompose, obtain B solution；
Step 4: weigh some CNTs through pretreatment, be dissolved in B solution, ultrasonic wave dispersion 60min,
Weigh a certain amount of SiO prepared by step 1 subsequently2Aeroge, is dissolved in B solution, magnetic agitation 30min, obtains C
Solution；
Step 5: in the case of quickly stirring, solution A be slowly dropped in C solution, after being added dropwise to complete, continues
Stirring 4h, then transfers to the solution obtained, in the polytetrafluoroethyltank tank of hydrothermal synthesis reaction still, carry out isothermal holding,
To solution D；
Step 6: solution D is used the mode of centrifugation, respectively with deionized water and absolute ethanol washing 3 times, will point
Product after from carries out constant pressure and dry, and the black powder obtained is the SnSb/ CNT composite negative pole material that aeroge is modified
Material.
Limiting further of technique scheme is: in step 2, prepare SnCl2And SbCl3Solution concentration 0.05～
0.3mol/L, SnCl2And SbCl3The ratio of amount of material control: SnCl2/SbCl3=3～1；
Limiting further of technique scheme is: in step 2, and the quality adding polyvinylpyrrolidone is theoretical gained
The 5%～15% of SnSb alloy mass；
Limiting further of technique scheme is: in step 3, prepare NaBH4The concentration of solution controls 0.1～0.3
mol/L；
Limiting further of technique scheme is: in step 4, CNT needs through pretreatment, the method for pretreatment
As follows: CNT is joined the dense HNO that volume ratio is 3:13With in the concentrated sulfuric acid, stirring at normal temperature mixes, and water-bath adds
Heat 70 DEG C also stirs 12h, is then centrifuged for washing, with the CNT of vacuum filtration isolated pretreatment, in drying box 50
DEG C dry 6h；
Limiting further of technique scheme is: in step 4, and the quality weighing CNT is theoretical gained SnSb alloy
The 1%～5% of quality；
Limiting further of technique scheme is: in step 4, weigh SiO2The quality of aeroge is theoretical gained SnSb
The 10%～30% of alloy mass；
Limiting further of technique scheme is: in step 5, the condition of isothermal holding is as follows: holding temperature is 160 DEG C
～200 DEG C, temperature retention time is 14h～24h；
Limiting further of technique scheme is: the constant pressure and dry condition described in step 6 is as follows: in vacuum drying chamber
Being dried, baking temperature controls at 60 DEG C～100 DEG C, and drying time controls at 6h～10h.
Compared with prior art, there is advantages that the present invention synthesizes nanometer initially with atmosphere pressure desiccation
Porous SiO2Aeroge, and as carrier, use chemical reduction method and hydro-thermal method etc. by nanometer SnSb of high theoretical specific capacity
Alloy is embedded on aeroge, and CNT uniform winding is wherein, constructs the aeroge/SnSb/ carbon nanometer with three-dimensional structure
Pipe composite negative pole material.The present invention supports SnSb alloy by nanoporous aerogel powder, even eliminates SnSb to reduce
The alloy volumetric expansion in the charge and discharge process impact on lithium battery stability.Meanwhile, the one-dimensional porous of CNT is utilized to tie
Structure had both contributed to the embedding of lithium ion in charge and discharge process and had moved out, and can be again that SnSb/ aeroge builds three-dimensional conductive network spy
Point, gives full play to SiO2Aeroge and CNT cooperative effect, to improve capacity and the cyclical stability of negative pole.Electrochemistry
The result of performance test shows that negative material capacity that the present invention obtains is high and good cycle, is a kind of preferably lithium-ion electric
Pond negative material, has potential application foreground in fields such as portable electric appts, electric automobile and Aero-Space.
Accompanying drawing explanation
Fig. 1 is the first charge-discharge curve map of the composite negative pole material of embodiment 1.
Fig. 2 is the circulation volume figure of the composite negative pole material of embodiment 1.
Detailed description of the invention
The present invention proposes the preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge is modified, including walking as follows
Rapid:
Step 1: with industrial waterglass or tetraethyl orthosilicate for silicon source, formamide and ethylene glycol for additive, acetic acid is catalyst,
Use sol-gel process and atmosphere pressure desiccation, prepare SiO2Aerogel powder material is stand-by；
Step 2: respectively with SnCl2·2H2O and SbCl3For Sn and Sb source, prepare certain density SnCl2And SbCl3
Solution, adds a certain amount of polyvinylpyrrolidone, then stirs, obtain solution A；
In step 2, prepare SnCl2And SbCl3Solution concentration 0.05～0.3mol/L, SnCl2And SbCl3The ratio of amount of material
Control: SnCl2/SbCl3=3～1；
In step 2, add quality is theoretical gained SnSb alloy mass the 5%～15% of polyvinylpyrrolidone；
Step 3: prepare certain density NaBH4Solution, the pH value adding NaOH control solution is more than 12, to prevent NaBH4
Decompose, to obtain B solution；
In step 3, prepare NaBH4The concentration of solution controls 0.1～0.3mol/L；
Step 4: weigh some CNTs through pretreatment, be dissolved in B solution, ultrasonic wave dispersion 60min,
Weigh a certain amount of SiO prepared by step 1 subsequently2Aeroge, is dissolved in B solution, magnetic agitation 30min, obtains C
Solution；
In step 4, CNT needs through pretreatment, and the method for pretreatment is as follows: CNT joins volume ratio is
The dense HNO of 3:13With in the concentrated sulfuric acid, stirring at normal temperature mixes, and heating water bath 70 DEG C also stirs 12h, is then centrifuged for washing,
With the CNT of vacuum filtration isolated pretreatment, 50 DEG C of dry 6h in drying box；
In step 4, weigh quality is theoretical gained SnSb alloy mass the 1%～5% of CNT；
In step 4, weigh SiO2The quality of aeroge is the 10%～30% of theoretical gained SnSb alloy mass；
Step 5: in the case of quickly stirring, solution A be slowly dropped in C solution, after being added dropwise to complete, continues
Stirring 4h, then transfers to the solution obtained, in the polytetrafluoroethyltank tank of hydrothermal synthesis reaction still, carry out isothermal holding,
To solution D；
In step 5, the condition of isothermal holding is as follows: holding temperature is 160 DEG C～200 DEG C, and temperature retention time is 14h～24h；
Step 6: solution D is used the mode of centrifugation, respectively with deionized water and absolute ethanol washing 3 times, will point
Product after from carries out constant pressure and dry, and the black powder obtained is the SnSb/ CNT composite negative pole material that aeroge is modified
Material.
In step 6, described constant pressure and dry condition is as follows: being dried in vacuum drying chamber, baking temperature controls at 60 DEG C～100
DEG C, drying time controls at 6h～10h.
Embodiment 1
With the industrial waterglass of 40wt% for silicon source, appropriate formamide and ethylene glycol are respectively dropped in water glass solution, three
The ratio of the amount of person's material is 3:1:1.Use 0.5mol L-1Acetic acid regulation colloidal sol pH to 12, left at room temperature obtains gel.Will
The gel of gained is aging 72h in deionization, then repeatedly washs by deionized water, finally soaks 72h in absolute ethyl alcohol,
By the way of normal pressure classification is dried (40 DEG C, 50 DEG C, 60 DEG C and 80 DEG C are dried 24h successively), prepare SiO2Airsetting rubber powder
Body material.
Weigh 4.51g SnCl2·2H2O and 2.28gSbCl3It is dissolved in 200ml absolute ethyl alcohol, adds the poly-of 0.45g the most wherein
Vinylpyrrolidone also stirs, and obtains solution A.Weigh the NaBH of 2.92g4It is dissolved in 520ml deionized water,
And add 1.5gNaOH, the NaBH of preparation 0.15mol/L4Solution, referred to as B solution.0.05g is added in B solution
CNT, ultrasonic wave dispersion 60min.Claim 0.70g SiO subsequently2Aeroge, is dissolved in B solution, magnetic agitation 30min,
Obtain C solution.In the case of quickly stirring, solution A is slowly dropped in C solution, after being added dropwise to complete, continues
Stirring 4h, then transfers in the polytetrafluoroethyltank tank of hydrothermal synthesis reaction still by the solution obtained, and protects under the conditions of 180 DEG C
Temperature 18h, obtains solution D.Solution D is used the mode of centrifugation, respectively with deionized water and absolute ethanol washing 3
Secondary, the product after separating is incubated 8h in 80 DEG C in vacuum drying chamber, and the black powder obtained is what aeroge was modified
SnSb/ CNT composite negative pole material.
The composite negative pole material obtained carries out constant current charge-discharge test, and charging/discharging voltage scope is 0.01～1.6V, result table
Bright: at 100mA g-1Current density under, the first charge-discharge of SnSb/ CNT composite negative pole material that aeroge is modified
Capacity is respectively 936mAh g-1With 517mAh g-1.After circulating 30 times, reversible capacity can maintain 451mAh g-1,
Efficiency for charge-discharge, close to 100%, shows and has preferable chemical property.
Embodiment 2
The present embodiment is a difference in that with embodiment 1: described weighs SnCl2·2H2O and SbCl3Quality be respectively 9.02g and
4.56g, polyvinylpyrrolidone quality is 0.36g, NaBH4Quality is 5.84g, and carbon nanotube mass is 0.07g, SiO2Gas
Gel quality is 1.44g, and the heat-retaining condition of hydrothermal synthesis reaction is 24h at 160 DEG C, and the product vacuum drying condition obtained is 60
10h at DEG C.Other is same as in Example 1.
Composite negative pole material constant current charge-discharge test described in the present embodiment shows, chemical property is held essentially constant, and circulates 30
After secondary, reversible capacity can maintain 472mAh g-1。
Embodiment 3
The present embodiment is a difference in that with embodiment 1: described weighs SnCl2·2H2O and SbCl3Quality be respectively 6.77g and
2.28g, polyvinylpyrrolidone quality is 0.48g, NaBH4Quality is 1.95g, and carbon nanotube mass is 0.24g, SiO2Gas
Gel quality is 1.44g, and the heat-retaining condition of hydrothermal synthesis reaction is 18h at 160 DEG C, and the product vacuum drying condition obtained is 60
8h at DEG C.Other is same as in Example 1.
Composite negative pole material constant current charge-discharge test described in the present embodiment shows, chemical property is held essentially constant, and circulates 30
After secondary, reversible capacity can maintain 467mAh g-1。
Embodiment 4
The present embodiment is a difference in that with embodiment 1: described weighs SnCl2·2H2O and SbCl3Quality be respectively 4.51g and
4.56g, polyvinylpyrrolidone quality is 0.72g, NaBH4Quality is 3.90g, and carbon nanotube mass is 0.14g, SiO2Gas
Gel quality is 0.48g, and the heat-retaining condition of hydrothermal synthesis reaction is 14h at 200 DEG C, and the product vacuum drying condition obtained is 100
6h at DEG C.Other is same as in Example 1.
Composite negative pole material constant current charge-discharge test described in the present embodiment shows, chemical property is held essentially constant, and circulates 30
After secondary, reversible capacity can maintain 481mAh g-1。
Claims (9)
1. the preparation method of the SnSb/ CNT composite negative pole material that an aeroge is modified, it is characterised in that include as
Lower step:
Step 1: with industrial waterglass or tetraethyl orthosilicate for silicon source, formamide and ethylene glycol as additive, acetic acid as catalyst,
Use sol-gel process and atmosphere pressure desiccation, prepare SiO2Aerogel powder material is stand-by；
Step 2: respectively with SnCl2·2H2O and SbCl3For Sn and Sb source, prepare certain density SnCl2And SbCl3
Solution, adds a certain amount of polyvinylpyrrolidone, then stirs, obtain solution A；
Step 3: prepare certain density NaBH4Solution, the pH value adding a certain amount of NaOH control solution is more than 12,
To prevent NaBH4Decompose, obtain B solution；
Step 4: weigh some CNTs through pretreatment, be dissolved in B solution, ultrasonic wave dispersion 60min,
Weigh a certain amount of SiO prepared by step 1 subsequently2Aeroge, is dissolved in B solution, magnetic agitation 30min, obtains C
Solution；
Step 5: in the case of quickly stirring, solution A be slowly dropped in C solution, after being added dropwise to complete, continues
Stirring 4h, then transfers to the solution obtained, in the polytetrafluoroethyltank tank of hydrothermal synthesis reaction still, carry out isothermal holding,
To solution D；
Step 6: solution D is used the mode of centrifugation, respectively with deionized water and absolute ethanol washing 3 times, will point
Product after from carries out constant pressure and dry, and the black powder obtained is the SnSb/ CNT composite negative pole material that aeroge is modified
Material.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 2, prepare SnCl2And SbCl3Solution concentration 0.05～0.3mol/L, SnCl2And SbCl3Material
The ratio of amount control: SnCl2/SbCl3=3～1.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 2, add quality is theoretical gained SnSb alloy mass the 5%～15% of polyvinylpyrrolidone.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 3, prepare NaBH4The concentration of solution controls 0.1～0.3mol/L.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 4, CNT needs through pretreatment, and the method for pretreatment is as follows: joined by CNT
Volume ratio is the dense HNO of 3:13With in the concentrated sulfuric acid, stirring at normal temperature mixes, and heating water bath 70 DEG C also stirs 12h, then from
The heart washs, with the CNT of vacuum filtration isolated pretreatment, 50 DEG C of dry 6h in drying box.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 4, weigh quality is theoretical gained SnSb alloy mass the 1%～5% of CNT.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 4, weigh SiO2The quality of aeroge is the 10%～30% of theoretical gained SnSb alloy mass.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: in step 5, the condition of isothermal holding is as follows: holding temperature is 160 DEG C～200 DEG C, and temperature retention time is 14h～24h.
The preparation method of the SnSb/ CNT composite negative pole material that a kind of aeroge the most according to claim 1 is modified,
It is characterized in that: the constant pressure and dry condition described in step 6 is as follows: being dried in vacuum drying chamber, baking temperature controls 60
DEG C～100 DEG C, drying time controls at 6h～10h.
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| CN105514447B (en) * | 2016-01-13 | 2017-09-15 | 南京理工大学 | A kind of method that constant pressure and dry prepares antimony-doped stannic oxide aeroge three-diemsnional electrode |
| CN106784751A (en) * | 2017-03-24 | 2017-05-31 | 南昌专腾科技有限公司 | A kind of preparation method and system of tin pewter composite negative pole material |
| CN107026265B (en) * | 2017-06-05 | 2019-05-17 | 深圳职业技术学院 | A kind of lithium ion battery SnS2The preparation method of/SnSb composite negative pole material |
| CN110247046A (en) * | 2019-07-19 | 2019-09-17 | 深圳职业技术学院 | A kind of preparation method of lithium ion battery CA/ nano Si/graphene composite negative pole |
| CN111969192B (en) * | 2020-08-18 | 2022-10-11 | 湖南大学 | Preparation method of alloy negative electrode material of sodium ion secondary battery with ultra-long cycle life |
| CN114203997B (en) * | 2021-12-06 | 2023-12-22 | 东莞市达瑞电子股份有限公司 | Preparation method of modified aerogel/tin-based composite anode material for lithium ion battery |
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