CN109119613A - Using rejected fly ash as the method for the lithium sulfur battery anode material of Material synthesis - Google Patents
Using rejected fly ash as the method for the lithium sulfur battery anode material of Material synthesis Download PDFInfo
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- CN109119613A CN109119613A CN201810980855.3A CN201810980855A CN109119613A CN 109119613 A CN109119613 A CN 109119613A CN 201810980855 A CN201810980855 A CN 201810980855A CN 109119613 A CN109119613 A CN 109119613A
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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
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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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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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
- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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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 present invention relates to using rejected fly ash as the method for the lithium sulfur battery anode material of Material synthesis, comprising the following steps: (1) rejected fly ash is carried out pickling, the flyash after decontamination is obtained after drying；(2) flyash after the decontamination for obtaining step (1) and elemental sulfur mixed grinding, are then placed in drying heat preservation in closed container, and grinding obtains the lithium sulfur battery anode material for using rejected fly ash as Material synthesis.Compared with prior art, raw material of the present invention comes from waste, and the positive electrode for greatly reducing Material Cost, and obtaining has higher charging and discharging capacity, excellent cyclical stability.This preparation method is simple, low in cost, has excellent performance, and is suitble to the production of large-scale commercial applications battery.
Description
Technical field
The present invention relates to a kind of lithium sulfur battery anode materials, more particularly, to a kind of using rejected fly ash as Material synthesis
The method of lithium sulfur battery anode material.
Background technique
Lithium-sulfur cell energy storage principle is the fracture of sulphur-sulfide linkage and lives again that active material is sulphur.Elemental sulfur is main at normal temperature
With S8Form exist, the rich reserves in the earth have the characteristics that cheap, environmental-friendly.Using sulphur as positive material
The lithium-sulfur cell of material, materials theory specific capacity and battery theory specific energy are higher, respectively reach 1672mAhg-1With
2600Wh·kg-1.It is considered as one of the lithium secondary battery system of present most researching value and application prospect.Although lithium sulphur
Battery has many advantages, such as high capacity, high-energy-density, but there is that active material utilization is low, cycle life is low and peace at present
The problems such as property is poor entirely, this seriously restricts the development of lithium-sulfur cell.The main reason for causing the above problem has the following aspects:
1) elemental sulfur is electronics and ion insulator, and room-temperature conductivity is low, since the sulphur of not no ionic state exists, thus is made
Difficulty is activated for positive electrode, leads to lithium-sulfur cell low range performance issue；
2) the poly- more lithium sulfide Li of state of height generated in electrode process2Sn(8 > n > 4) are soluble in electrolyte, just
Concentration difference is formed between cathode, cathode is moved under the action of concentration gradient, and the high poly- more lithium sulfides of state are reduced by lithium metal
The oligomeric more lithium sulfides of state.With the progress reacted above, the oligomeric more lithium sulfides of state are assembled in cathode, finally shape between electrodes
At concentration difference, and moves to anode and be oxidized to the high poly- more lithium sulfides of state.This phenomenon is referred to as shuttle effect, and it is living to reduce sulphur
The utilization rate of property substance.Insoluble Li simultaneously2S and Li2S2It is deposited on cathode of lithium surface, is further degrading lithium-sulfur cell
Performance, lead to the low circulation performance issue of lithium-sulfur cell；
3) sulphur and final product Li2The density of S is different, and volume expansion about 79%, easily leads to Li after sulphur is lithiated2S's
Dusting causes the safety problem of lithium-sulfur cell.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind with rejected fly ash
For the method for the lithium sulfur battery anode material of Material synthesis.
The purpose of the present invention can be achieved through the following technical solutions:
The present invention by using the rejected fly ash generated in power plant operation as raw material, by utilizing its own
The structure of unique hollow silica ball obtains lithium after being loaded into elemental sulfur in hollow silica ball by the method for melting
Sulphur cell positive electrode material.
One of the objects of the present invention is to provide a kind of lithium sulfur battery anode materials, by hollow silica ball
Melting is loaded into elemental sulfur and is prepared.
The second object of the present invention is the provision of one kind using rejected fly ash as the above-mentioned lithium-sulphur cell positive electrode of Material synthesis
The method of material, comprising the following steps:
(1) rejected fly ash is subjected to pickling, the flyash after decontamination is obtained after drying；
(2) flyash after the decontamination for obtaining step (1) and elemental sulfur mixed grinding add carbon disulfide continuation
Grinding is then placed in drying heat preservation in closed container, obtains the lithium-sulphur cell positive electrode material for using rejected fly ash as Material synthesis
Material.
As a preferred embodiment of the above technical solution, in step (1), pre-treatment is carried out to flyash before pickling, pre-treatment
Mode includes that grinding, washing or alcohol are washed.
As a preferred embodiment of the above technical solution, in step (1): the rejected fly ash is discarded after thermal power plant's combusting coal fines
Flyash.
As a preferred embodiment of the above technical solution, in step (1): pickling uses dilute hydrochloric acid or dilute sulfuric acid, concentration 0.01-
0.1mol/L。
As a preferred embodiment of the above technical solution, in step (1): the ratio of rejected fly ash and acid solution is 1:20-1:200.
As a preferred embodiment of the above technical solution, the processing step of pickling described in step (1) are as follows: acid solution, stirring is added
Or it after ultrasound 1-24h, is washed with deionized to neutrality.
As a preferred embodiment of the above technical solution, in step (2): the mass ratio of flyash and elemental sulfur after decontamination is 1:
1-1:10, the time of grinding are 1-6h.
As a preferred embodiment of the above technical solution, in step (2): the matter of the mixture and carbon disulfide of flyash and elemental sulfur
It is complete to carbon disulfide evaporation to continue grinding 1-5h than being 1:5-1:50 for amount.
As a preferred embodiment of the above technical solution, in step (2): the closed container is that metal enclosed container or glass are closed
Container can be the reaction kettle or measuring bottle of clean free from admixture, and sulfurizing temperature is 150-160 DEG C, soaking time 0.5-24h.
By the ratio mixed grinding 1- of the positive electrode being prepared and acetylene black and Kynoar 8:1:1 in mass ratio
After 5h is until be mixed thoroughly, the slurry of black even is obtained after N-Methyl pyrrolidone 10-50mL is added, is coated aluminium
On foil, then drying obtains the pole piece of assembled battery under the conditions of 60 DEG C, finally assembles lithium-sulfur cell.
Further, in step (1), pre-treatment is carried out to flyash before pickling, the mode of pre-treatment includes grinding, water
It washes or alcohol is washed.Wherein grinding is that a simple processing is carried out to the sample particle diameter of coal ash, prevents excessive particle or reunion
Particle it is excessive.
Further, in step (1), pickling uses dilute hydrochloric acid or dilute sulfuric acid, concentration 0.01-1mol/L.The mesh of pickling
Be remove sample in trace metal impurities.
Further, in step (2): the mass ratio of flyash and elemental sulfur after decontamination is 1:1-1:10, grinding
Time is 1-6h.The ratio of flyash and elemental sulfur will be in this reasonable range, and sulphur excessively will cause a large amount of sulphur outside sample
Table is unfavorable for the cycle performance of battery.Sulphur is very few, will affect the capacity decline of battery.
Further, the closed container is metal enclosed container or glass closed container, can be clean free from admixture
Reaction kettle or measuring bottle, sulfurizing temperature are 150-160 DEG C, soaking time 0.5-24h.Wherein the temperature of sulfurizing is lower than 150 DEG C,
Elemental sulfur can not molten state penetrate into flyash in, temperature be higher than 160 DEG C of viscosity that will lead to sulphur it is excessive, be also unfavorable for penetrate into fine coal
In ash.
The method of elemental sulfur melting is penetrated into hollow silica ball and is obtained using waste and old flyash as raw material by the present invention
To lithium sulfur battery anode material.This material very good solution " shuttle effect " of lithium-sulfur cell, to obtain Fabrication of High Specific Capacitance
The lithium-sulfur cell of amount, long circulating performance.
The rejected fly ash that the present invention generates after burning by using coal fines high-temperature in power plant operation is raw material, is utilized
The design feature of the hollow silica ball of own has obtained lithium sulphur electricity by penetrating into elemental sulfur in hollow silica ball
Pond positive electrode, method is simple and effective, and obtained battery material energy-storage property is excellent.The specifically silica of hollow structure
It can be very good storage sulphur, solid sulphur, the polysulfide for protecting lithium-sulfur cell to generate in charge and discharge process well is lost to cathode.
So obtained positive electrode energy-storage property is excellent, (under the charging or discharging current density of 1C, after 600 circle of circulation, specific capacity is also able to maintain
In 610mAhg-1)。
Compared with prior art, the invention has the following advantages:
1) the silica spheres cavity of hollow structure provides storage sulphur space well, solves the poorly conductive of elemental sulfur
The problem of；
2) micropore, mesoporous and macropore of many diameters at 1-500 nanometers, this some holes knot be distributed in hollow silica ball
The infiltration that the presence of structure has conducive to elemental sulfur, while the polysulfide in battery charge and discharge process can be prevented to shuttle, to mention
Risen battery cycle performance (under the charging or discharging current density of 1C, circulation 600 circle after, specific capacity can also be maintained at 610mAhg-1)；
3) be mainly in flyash silica ingredient, in addition to this there are also part carbon component, and this silicon carbon material
Advantage be exactly there is good electronics and ion transportation, and this advantage can greatly promote the reaction power of material
It learns, to improve the high rate performance of battery.
Detailed description of the invention
Fig. 1 is the stereoscan photograph of the hollow silica spherical structure of 1 flyash of embodiment；
Fig. 2 is the transmission electron microscope photo of the hollow silica spherical structure of 1 flyash of embodiment；
Fig. 3 is the XRD spectrum of the hollow silica spherical structure of 1 flyash of embodiment；
Fig. 4 is that embodiment 1 uses rejected fly ash to prepare following for lithium-sulfur cell for Material synthesis lithium sulfur battery anode material
Ring performance performance map.
Specific embodiment
It is a kind of obtained in the embodiment of the present invention to use rejected fly ash for raw material, utilize the hollow silica of its own
After penetrating into elemental sulfur in the molten state, the electricity of lithium-sulfur cell is prepared as lithium sulfur battery anode material for the design feature of ball
Chemical property is tested by electrochemical workstation and blue electrical measurement test system；Electrochemical workstation used is occasion China electrochemistry
Work station；Blue electrical measurement test system uses LAND-CT2001.Electrochemical property test is tested using 2032 type button cells, button
Battery full of argon gas glove box in assemble, in glove box the content value of water and the content value of oxygen be held at 0.1ppm with
Under.
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
Using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material.Specifically includes the following steps:
(1) collect the rejected fly ash from certain power plant, weigh 1kg, after being washed with a large amount of deionized waters drying to
With.
(2) product of drying is taken out and is ground under dry environment, pickling is dry, and milling time 30min, pickling uses
The hydrochloric acid that concentration is 0.2%, stirring 12h is until remove the metal impurities in carbon material.Finally product is centrifuged with deionized water
Neutrality is washed into, then 60 DEG C of drying obtain hollow silica ball.
(3) the ratio mixed grinding 1h for the hollow silica ball and simple substance sulphur powder 1:3 in mass ratio for obtaining drying, so
The carbon disulfide of 30mL is added afterwards, is further continued for grinding until carbon disulfide evaporation obtains uniformly mixed product completely, then with close
It is collected in the weighing bottle closed, is finally putting into 156 DEG C of heat preservation 10h of baking oven.Finally obtain sulphur/hollow silica ball positive electrode
Sample.
(4) after obtaining sample, it is made into the slurry containing conductive agent, bonding agent and organic solvent.Conductive agent
For acetylene black, bonding agent is Kynoar PVDF, and organic solvent is N-Methyl pyrrolidone NMP, is then coated on slurry
In copper foil current collector, battery is then assembled into glove box.Finally by assembled battery in blue electrical measurement test system and electrification
Work station is learned to carry out electro-chemical test and sample is carried out otherwise physical characterization etc..
The stereoscan photograph for the hollow silica ball that Fig. 1 is, can be clearly seen that hollow silica ball
The external morphology of material.
The transmission electron microscope photo for the hollow silica ball material that Fig. 2 is, can be clearly seen that hollow titanium dioxide
The hollow structure of silicon ball.
Fig. 3 is the XRD spectrum of hollow silica ball, and characterize hollow silica ball material is one kind with titanium dioxide
Silicon is that there are also the silicon carbon materials of carbon component for main component.
Fig. 4 is after the sulphur/hollow silica ball finally obtained assembles lithium-sulfur cell as lithium sulfur battery anode material
Overlength cycle performance figure, data show that battery after charge and discharge cycles 600 times, has still maintained 610mAhg in figure-1Specific volume
Amount.
Embodiment 2
Using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, specifically includes the following steps:
(1) collect the rejected fly ash from certain power plant, weigh 5kg, after being washed with a large amount of deionized waters drying to
With.
(2) product of drying is taken out and is ground under dry environment, pickling is dry, milling time 30min, pickling concentration
For 0.3% hydrochloric acid, 20h is stirred until removing the metal impurities in carbon material.Finally with deionized water by product centrifuge washing
Hollow silica ball is obtained at neutrality, then 60 DEG C of drying.
(3) the ratio mixed grinding 1h for the hollow silica ball and simple substance sulphur powder 1:6 in mass ratio for obtaining drying, so
The carbon disulfide of 1L is added afterwards, is further continued for grinding until carbon disulfide evaporation obtains uniformly mixed product completely, then with closed
Weighing bottle in collect, be finally putting into 155 DEG C of heat preservation 20h of baking oven.Finally obtain sulphur/hollow silica ball positive electrode sample
Product.
(4) after obtaining sample, it is made into the slurry containing conductive agent, bonding agent and organic solvent.Conductive agent
For acetylene black, bonding agent is Kynoar PVDF, and organic solvent is N-Methyl pyrrolidone NMP, is then coated on slurry
In copper foil current collector, battery is then assembled into glove box.Finally by assembled battery in blue electrical measurement test system and electrification
Work station is learned to carry out electro-chemical test and sample is carried out otherwise physical characterization etc..
Embodiment 3
Using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material.Specifically includes the following steps:
(1) collect the rejected fly ash from certain power plant, weigh 10kg, after being washed with a large amount of deionized waters drying to
With.
(2) product of drying is taken out and is ground under dry environment, pickling is dry, milling time 30h, and pickling concentration is
0.4% hydrochloric acid, stirring is for 24 hours until remove the metal impurities in carbon material.Finally with deionized water by product centrifuge washing at
Neutrality, then 60 DEG C of drying obtain hollow silica ball.
(3) the ratio mixed grinding 1h for the hollow silica ball and simple substance sulphur powder 1:4 in mass ratio for obtaining drying, so
The carbon disulfide of 2L is added afterwards, is further continued for grinding until carbon disulfide evaporation obtains uniformly mixed product completely, then with closed
Weighing bottle in collect, be finally putting into 155 DEG C of heat preservation 20h of baking oven.Finally obtain sulphur/hollow silica ball positive electrode sample
Product.
(4) after obtaining sample, it is made into the slurry containing conductive agent, bonding agent and organic solvent.Conductive agent
For acetylene black, bonding agent is Kynoar PVDF, and organic solvent is N-Methyl pyrrolidone NMP, is then coated on slurry
In copper foil current collector, battery is then assembled into glove box.Finally by assembled battery in blue electrical measurement test system and electrification
Work station is learned to carry out electro-chemical test and sample is carried out otherwise physical characterization etc..
Embodiment 4
Using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material.Specifically includes the following steps:
(1) collect household coal briquette burning after rejected fly ash, weigh 5kg, after being washed with a large amount of ethyl alcohol drying to
With.
(2) product of drying is taken out and is ground under dry environment, pickling is dry, milling time 30min, pickling concentration
For the hydrochloric acid of 0.6mol/L, ultrasound simultaneously stirs 1h until removing the metal impurities in carbon material.Finally with deionized water by product
Centrifuge washing obtains hollow silica ball at neutrality, then 60 DEG C of drying.
(3) the ratio mixed grinding 3h for the hollow silica ball and simple substance sulphur powder 1:1 in mass ratio for obtaining drying, so
The carbon disulfide of 1L is added afterwards, is further continued for grinding until carbon disulfide evaporation obtains uniformly mixed product completely, then with closed
Weighing bottle in collect, be finally putting into 150 DEG C of baking oven heat preservation for 24 hours.Finally obtain sulphur/hollow silica ball positive electrode sample
Product.
(4) after obtaining sample, it is made into the slurry containing conductive agent, bonding agent and organic solvent.Conductive agent
For acetylene black, bonding agent is Kynoar PVDF, and organic solvent is N-Methyl pyrrolidone NMP, is then coated on slurry
In copper foil current collector, battery is then assembled into glove box.Finally by assembled battery in blue electrical measurement test system and electrification
Work station is learned to carry out electro-chemical test and sample is carried out otherwise physical characterization etc..
Embodiment 5
Using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material.Specifically includes the following steps:
(1) collect household coal briquette burning after rejected fly ash, weigh 2kg, after being washed with a large amount of ethyl alcohol drying to
With.
(2) product of drying is taken out and is ground under dry environment, pickling is dry, milling time 30min, pickling concentration
For the dilute sulfuric acid of 0.7mol/L, ultrasonic 10h is until remove the metal impurities in carbon material.Finally product is centrifuged with deionized water
Neutrality is washed into, then 60 DEG C of drying obtain hollow silica ball.
(3) the ratio mixed grinding 6h for the hollow silica ball and simple substance sulphur powder 1:10 in mass ratio for obtaining drying,
Then the carbon disulfide of 1L is added, is further continued for grinding until carbon disulfide evaporation obtains uniformly mixed product completely, then with close
It is collected in the weighing bottle closed, is finally putting into 160 DEG C of heat preservation 0.5h of baking oven.Finally obtain sulphur/hollow silica ball positive electrode
Sample.
(4) after obtaining sample, it is made into the slurry containing conductive agent, bonding agent and organic solvent.Conductive agent
For acetylene black, bonding agent is Kynoar PVDF, and organic solvent is N-Methyl pyrrolidone NMP, is then coated on slurry
In copper foil current collector, battery is then assembled into glove box.Finally by assembled battery in blue electrical measurement test system and electrification
Work station is learned to carry out electro-chemical test and sample is carried out otherwise physical characterization etc..
In the above various embodiments, the concentration of hydrochloric acid or sulfuric acid used by pickling could alternatively be 0.01M or 1M.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (10)
1. a kind of lithium sulfur battery anode material, which is characterized in that by melting the elemental sulfur system of loading in hollow silica ball
It is standby to obtain.
2. using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material as described in claim 1, feature exists
In, comprising the following steps:
(1) rejected fly ash is subjected to pickling, the flyash after decontamination is obtained after drying；
(2) flyash after the decontamination for obtaining step (1) and elemental sulfur mixed grinding, add carbon disulfide, continue to grind
It is milled to evaporation completely, is then placed in drying heat preservation in closed container, obtain the lithium sulphur electricity for using rejected fly ash as Material synthesis
Pond positive electrode.
3. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
It is, in step (1), pre-treatment is carried out to flyash before pickling, the mode of pre-treatment includes that grinding, washing or alcohol are washed.
4. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
It is, in step (1): the rejected fly ash is flyash or household coal briquette discarded after thermal power plant's combusting coal fines or coal dust
The flyash left after high-temp combustion.
5. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
It is, in step (1): pickling uses dilute hydrochloric acid or dilute sulfuric acid, concentration 0.01-1mol/L.
6. it is according to claim 2 or 5 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, it is special
Sign is, in step (1): the mass ratio of discarded coal ash and acid is 1:20-1:200.
7. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
Be, the processing step of pickling in step (1) are as follows: be added acid solution, stirring or ultrasound 1-24h after, be washed with deionized to
It is neutral.
8. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
It is, in step (2): the mass ratio of flyash and elemental sulfur after decontamination is 1:1-1:10, and the time of grinding is 1-6h.
9. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
It is, in step (2): the mass ratio of the mixture and carbon disulfide of flyash and elemental sulfur is 1:5-1:50, continues to grind 1-
5h is complete to carbon disulfide evaporation.
10. according to claim 2 using rejected fly ash as the method for Material synthesis lithium sulfur battery anode material, feature
It is, in step (2): the closed container is metal enclosed container or glass closed container, and drying temperature is 150-160 DEG C,
Holding temperature is 150-160 DEG C, soaking time 0.5-24h.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224171A (en) * | 2019-05-10 | 2019-09-10 | 哈工大新材料智能装备技术研究院（招远）有限公司 | A kind of preparation method of practical cheap solid polymer electrolyte |
| CN112864375A (en) * | 2021-01-08 | 2021-05-28 | 中南大学 | Method for preparing lithium-sulfur battery positive electrode material by taking smelting slag as raw material |
| CN113451557A (en) * | 2021-06-25 | 2021-09-28 | 安徽工业大学 | Preparation method of lithium-sulfur battery positive-grade material |
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| CN103730632A (en) * | 2013-12-18 | 2014-04-16 | 湘潭大学 | Bergmeal-based lithium sulphur battery cathode material as well as preparation and application methods thereof |
| CN104064738A (en) * | 2014-06-27 | 2014-09-24 | 哈尔滨工业大学 | Hydrothermal preparation method of graphene-coated sulfur/porous carbon composite positive electrode material |
| CN105006557A (en) * | 2015-05-14 | 2015-10-28 | 中国矿业大学 | Method for preparing lithium sulfur battery cathode material sealed by nano metal valve |
| KR20180066358A (en) * | 2016-12-08 | 2018-06-19 | 재단법인대구경북과학기술원 | Sulfur embedded composite using nonconductor and Li―S battery |
| CN107834052A (en) * | 2017-12-15 | 2018-03-23 | 重庆科技学院 | A kind of method and its material that lithium ion battery silicon cathode material is prepared using flyash solid waste |
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| CN110224171A (en) * | 2019-05-10 | 2019-09-10 | 哈工大新材料智能装备技术研究院（招远）有限公司 | A kind of preparation method of practical cheap solid polymer electrolyte |
| CN110224171B (en) * | 2019-05-10 | 2022-03-04 | 招远市国有资产经营有限公司 | Preparation method of solid polymer electrolyte |
| CN112864375A (en) * | 2021-01-08 | 2021-05-28 | 中南大学 | Method for preparing lithium-sulfur battery positive electrode material by taking smelting slag as raw material |
| CN113451557A (en) * | 2021-06-25 | 2021-09-28 | 安徽工业大学 | Preparation method of lithium-sulfur battery positive-grade material |
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