CN112072189A - LiFeCl4、NaFeCl4And KFeCl4Application of one or more molten salts in molten salt battery and molten salt battery - Google Patents
LiFeCl4、NaFeCl4And KFeCl4Application of one or more molten salts in molten salt battery and molten salt battery Download PDFInfo
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- CN112072189A CN112072189A CN201910500613.4A CN201910500613A CN112072189A CN 112072189 A CN112072189 A CN 112072189A CN 201910500613 A CN201910500613 A CN 201910500613A CN 112072189 A CN112072189 A CN 112072189A
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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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M10/39—Accumulators not provided for in groups H01M10/05-H01M10/34 working at high temperature
- H01M10/399—Cells with molten salts
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
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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
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M10/38—Construction or manufacture
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/002—Inorganic electrolyte
- H01M2300/0022—Room temperature molten salts
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The present invention provides LiFeCl4、NaFeCl4And KFeCl4One or more molten salts in the molten salt battery. The invention also provides a molten salt battery, which comprises a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte contains LiFeCl4、NaFeCl4And KFeCl4One or more molten salt electrolytes. The molten salt battery provided by the invention has the advantages that the whole life cycle energy storage cost is low, and Fe and FeCl are generated at the negative electrode during charging and discharging2The solid-solid conversion process is carried out, and the dendritic crystal generation risk is avoided. The molten salt battery provided by the invention has good charge-discharge rate performance and good safety and belongs to an environment-friendly type.
Description
Technical Field
The invention belongs to the field of electrochemistry. In particular, the invention relates to LiFeCl4、NaFeCl4And K FeCl4One or more molten salts and a molten salt battery.
Background
With the continuous consumption of traditional fossil energy, the efficient utilization of the existing energy output and the development of new renewable energy have become important contents for energy structure upgrading of various countries. The importance of the deployment and efficient use of electrical energy as the primary form of energy production is self evident. In the process of building an intelligent power grid in China, in order to effectively reduce or eliminate the peak-valley difference and smooth load of the power grid between day and night, improve the operation efficiency of power equipment and reduce the power supply cost, a power system needs to be changed from a traditional type to a clean, efficient and intelligent type, and the simultaneous adjustment of the capacity and the load is realized in a micro-grid mode; on the other hand, the inherent characteristics of wind power, photovoltaic and other new energy power generation, such as intermittence, discontinuity, instability and the like, make the new energy industry empty of huge installation amount and only a few of generated energy can be utilized by grid connection. No matter whether the peak-valley difference of the power grid is reduced or eliminated in daytime and nighttime, the load is smoothed, or the instability of renewable energy sources is eliminated, the grid-connected power generation really needs an energy storage technology with low cost and high safety as a support.
Disclosure of Invention
The object of the present invention is to provide LiFeCl4、NaFeCl4And KFeCl4One or more molten salts in the process. Meanwhile, the invention provides a novel low-cost and high-safety molten salt battery suitable for the large-scale battery energy storage market.
In one aspect, the present invention provides LiFeCl4、NaFeCl4And KFeCl4One or more molten salts in the molten salt battery.
Preferably, in the application of the present invention, the LiFeCl is4、NaFeCl4And KFeCl4One or more molten salts in the molten salt battery are used in the electrolyte of the molten salt battery.
In another aspect, the invention provides a molten salt battery comprising a positive electrode, a negative electrode, and an electrolyte comprising LiFeCl4、NaFeCl4And KFeCl4One or more molten salt electrolytes.
Preferably, in the molten salt battery of the present invention, the LiThe total mole number of one or more of Cl, NaCl and KCl and the LiFeCl4、NaFeCl4And KFeCl4The proportion of the total moles of one or more substances in the molten salt electrolyte is (0-2): 1, the total mole number of one or more of LiCl, NaCl and KCl is not 0. When the molten salt electrolyte contains one or more of LiCl, NaCl and KCl, the self-discharge current density of the molten salt battery is lower, the battery runs more stably, and meanwhile, the electrolyte disclosed by the invention has lower corrosivity on a battery packaging material.
Preferably, in the molten salt battery of the present invention, the electrolyte further comprises FeCl3(ii) a Preferably, the FeCl3With said LiFeCl4、NaFeCl4And KFeCl4The proportion of the total moles of one or more substances in the molten salt electrolyte is (0-2): 1, said FeCl3The number of moles of (a) is different from 0. When the molten salt electrolyte of the present invention contains FeCl3In this case, the energy density of the molten salt battery of the present invention can be made higher, and the rate capability of the molten salt battery of the present invention can be made better.
Preferably, in the molten salt battery of the present invention, the negative electrode is formed of a substance containing Fe as an elemental substance.
Preferably, in the molten salt battery of the present invention, the positive electrode is formed of a graphite-based material.
Preferably, in the molten salt battery of the present invention, the positive electrode is formed of a substance selected from graphite, graphene, carbon nanotubes, graphite felt, and carbon felt.
Preferably, in the molten salt battery of the present invention, the LiFeCl4The molten salt electrolyte is prepared by mixing LiCl and FeCl3Heating under the protection of dry air or inert atmosphere to obtain the product; the NaFeCl4The molten salt electrolyte is prepared by mixing NaCl and FeCl3Heating under the protection of dry air or inert atmosphere to obtain the product; the KFeCl4The molten salt electrolyte is prepared by mixing KCl and FeCl3Heating under the protection of dry air or inert atmosphere.
PreferablyIn the molten salt battery of the present invention, the operating temperature of the molten salt battery is 80 to 200 ℃. More preferably, when the electrolyte comprises LiFeCl4、NaFeCl4And KFeCl4When at least two of the molten salt electrolytes are used, the melting point of the molten salt electrolyte can be reduced, so that the molten salt battery provided by the invention can be operated at lower temperature, such as below 120 ℃.
The molten salt battery of the present invention can be prepared by employing the following method:
negative electrode: the negative electrode of the present invention is formed of a substance containing Fe as a simple substance. The negative electrode of the present invention may be in various forms such as iron foil and iron foam. The molten salt battery can be assembled in a full discharge state and heated, and then FeCl in electrolyte4 -In-situ corrosion of Fe surface to produce FeCl2。
And (3) positive electrode: the positive electrode of the present invention is formed of a substance containing a graphite-based material. The positive electrode of the present invention may include all electrodes using graphite as an active material, such as two-dimensional graphite material electrodes, self-supporting three-dimensional structure electrodes, and electrodes formed by coating or pressing graphite powder.
Electrolyte: LiFeCl of the invention4、NaFeCl4And KFeCl4The molten salt electrolyte can be prepared by mixing LiCl, NaCl and KCl with FeCl, respectively3Heating at a molar ratio of 1:1 in dry air or inert atmosphere, i.e.
LiCl+FeCl3＝LiFeCl4；NaCl+FeCl3＝NaFeCl4；KCl+FeCl3＝KFeCl4；
Due to the LiFeCl of the invention4、NaFeCl4And KFeCl4The molten salt electrolyte is prepared by respectively mixing LiCl, NaCl or KCl with FeCl3Heating in dry air or inert atmosphere, thus removing LiFeCl when preparing the molten salt electrolyte4、NaFeCl4And KFeCl4In addition to one or more molten salt electrolytes, the battery electrolyte contains one or more of LiCl, NaCl and KCl or FeCl3When the battery is assembled, the air can be dried in advance orHeating one or more of LiCl, NaCl and KCl and FeCl under the protection of inert atmosphere3Formation of LiFeCl4、NaFeCl4And KFeCl4One or more of molten salt electrolyte and one or more of LiCl, NaCl and KCl or FeCl are used3Mixing and assembling the battery, or directly mixing FeCl3And one or more of LiCl, NaCl and KCl are uniformly mixed and used for assembling the battery, and the LiFeCl can automatically react to generate LiFeCl after the temperature of the battery is raised4、NaFeCl4And KFeCl4One or more of molten salt electrolyte and one or more of LiCl, NaCl and KCl or LiFeCl4、NaFeCl4And KFeCl4One or more of molten salt electrolyte and FeCl3And (3) mixing.
The invention has the beneficial effects that:
(1) the full life cycle energy storage cost of the molten salt battery provided by the invention is as low as 0.02 $/kWh per cycle-1Far lower than the current mainstream energy storage battery technology (such as lithium ion battery, about 0.12 $. kWh)-1). This is because the cost of the anode and cathode materials in the molten salt battery of the invention is extremely low. And LiFeCl4、NaFeCl4And KFeCl4One or more of the molten salt electrolyte can be prepared from one or more of LiCl, NaCl and KCl and FeCl3The electrolyte is obtained by heating after mixing, the synthetic raw material of the electrolyte is extremely cheap and abundant, and LiFeCl4、NaFeCl4And KFeCl4The preparation method of the molten salt electrolyte is simple.
(2) The molten salt battery provided by the invention generates Fe and FeCl on the negative electrode during charging and discharging2The solid-solid conversion process is carried out, and the dendritic crystal generation risk is avoided; while the positive electrode side is charging, FeCl in the electrolyte4 -FeCl embedded between graphite positive electrode layers and embedded between graphite layers during discharge4 -And the electrolyte is separated from the electrolyte, so that the reversibility of the whole process is very strong, and the operation stability is extremely high, thereby greatly improving the operation stability and safety of the battery. Therefore, the molten salt battery provided by the invention has the cycle life of more than 10000 times, which is calculated by one charge-discharge cycle per day and is aboutThe operation can be carried out for 27 years.
(3) The molten salt battery provided by the invention has good charge-discharge rate performance, and the charge-discharge current density can reach 10000 mA-g for graphite cathode materials-1The equilibrium voltage is about 1.5V, and the battery can be charged and discharged at a rate of 100C with a large rate. The excellent high-current charging and discharging power is mainly due to the fact that the molten salt electrolyte adopted by the battery has extremely high ion transmission rate, the electrochemical reaction activity of the battery is accelerated when the battery runs at high temperature, and FeCl4 -The intercalation reaction rate and reversibility in graphite electrodes are extremely high.
(4) The fused salt battery provided by the invention has good safety, active metals such as lithium and sodium are not contained in the battery material, and safety accidents such as explosion and the like cannot occur even if the battery is broken and exposed in the air; in addition, the solid-solid conversion mechanism of the metal Fe negative electrode without dendritic crystal growth also ensures that the battery has no short circuit risk and has higher charging and discharging operation safety. In addition, materials required by the molten salt battery provided by the invention are harmless to the environment, for example, iron is widely applied to national production as a structural material, ferric trichloride is also widely applied as a sewage treatment agent, and sodium chloride and graphite materials are nontoxic and harmless mature industrial products, so that the molten salt battery provided by the invention is high in safety and is environment-friendly.
Drawings
Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view of the charge-discharge principle of a molten salt battery according to an embodiment of the present invention;
FIG. 2 shows Fe | FeCl in example 1 of the present invention2|NaFeCl4-NaCl(NaFeCl4NaCl 1:0.3) I constant current charge-discharge voltage curve of the graphite molten salt battery;
FIG. 3 shows Fe | FeCl in example 1 of the present invention2|NaFeCl4-NaCl(NaFeCl4A graph showing the constant-current charge-discharge capacity and the coulombic efficiency of the graphite molten salt battery along with the cycle variation, wherein NaCl is 1: 0.3;
FIG. 4 shows Fe | FeCl in example 2 of the present invention2|NaFeCl4-FeCl3(NaFeCl4:FeCl3Constant-current charge-discharge voltage curve of graphite molten-salt battery (1: 0.5) |;
FIG. 5 shows Fe | FeCl in example 2 of the present invention2|NaFeCl4-FeCl3(NaFeCl4:FeCl3The constant-current charge-discharge capacity and the coulombic efficiency of the graphite molten salt battery under different charge-discharge multiplying power are plotted along with the cycle variation;
FIG. 6 shows Fe | FeCl in example 3 of the present invention2|LiFeCl4-KFeCl4(LiFeCl4:KFeCl4Constant-current charge-discharge voltage curve of the graphite molten salt battery is 6:4) |;
FIG. 7 shows Fe | FeCl in example 3 of the present invention2|LiFeCl4-KFeCl4(LiFeCl4:KFeCl4A graph of constant-current charge-discharge capacity and coulombic efficiency of the graphite molten salt battery with the cycle variation is formed, wherein the graph is 6: 4);
FIG. 8 shows Fe | FeCl in example 4 of the present invention2|NaFeCl4A constant-current charge-discharge voltage curve of the graphite molten salt battery;
FIG. 9 shows Fe | FeCl in example 4 of the present invention2|NaFeCl4And (3) a graph of the constant-current charge-discharge capacity and the coulombic efficiency of the graphite molten salt battery along with the cycle change.
Detailed Description
The present invention is described in further detail below with reference to specific embodiments, which are given for the purpose of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic view of the charge and discharge principle of a molten salt battery according to an embodiment of the present invention. FIG. 1 shows a molten salt battery assembled in a fully discharged state with a negative electrode of metallic Fe, a positive electrode of graphite, and an electrolyte of NaFeCl saturated with NaCl4A molten salt electrolyte. FeCl after the cell is heated to about 170 deg.C3Reacting with NaCl to generate liquid NaFeCl4Molten salt electrolyte (melting point about 158 deg.C), the NaFeCl4When the molten salt electrolyte contacts with the cathode metal Fe, a layer of FeCl is generated in situ on the surface of the Fe2And a passivation layer. During charging, electrons are lost from the positive graphite electrode side, and FeCl is simultaneously removed4 -Intercalation in graphiteFeCl on the surface of the negative electrode metal Fe2Electrons are obtained, converted into Fe and Cl is given-With the remaining Na in the electrolyte+Bound to FeCl2NaCl is generated on the surface of the passivation layer; na in the electrolyte is obtained on the negative electrode side during charging as a whole+FeCl in electrolyte4 -Upon intercalation of graphite between the layers on the positive electrode side, the reverse process to that described above occurs upon discharge.
The negative reaction of the cell is:
the positive electrode reaction is:
the total reaction formula of the battery is as follows:
in the formula CnIndicating multilayer graphite, the reaction formula indicates charging to the right and discharging to the left.
Example 1
This example provides a Fe | FeCl2|NaFeCl4-NaCl(NaFeCl4NaCl 1:0.3 | graphite molten salt battery. The negative electrode of the battery is a metal Fe foil with the thickness of 0.1mm, and the electrolyte is NaCl and FeCl3According to the uniform mixture with the molar ratio of 1.3:1, the positive electrode adopts a graphite felt which is commercially available and has the thickness of 1mm after being graphitized at the high temperature of 2800 ℃. During assembly, NaCl and FeCl are directly mixed3Is introduced between the positive and negative electrodes of the battery, followed by drying in air (H)2O<10ppm) of the electrolyte. When the battery is tested, the temperature is firstly raised to 200 ℃, and the temperature is kept for 2h to ensure that NaCl and FeCl added into the battery3According to a molar ratio of 1:1 reaction to produce NaFeCl4(melting point 158 ℃ C.), and then, the battery was chargedAnd cooling to 170 ℃, and then starting the electrochemical performance test.
Fig. 2 is a typical charge-discharge voltage curve for this cell at a 0.33C discharge rate. Fig. 2 shows that the equilibrium voltage of the cell is about 1.5V. Fig. 3 is data of the charge capacity, discharge capacity and coulombic efficiency of the battery as the cycle progresses. Fig. 3 shows that the battery has a capacity of about 6Ah, and is stably operated about 2700 times at a coulombic efficiency of more than 99%, sufficiently showing the cycle stability of the battery.
Example 2
This example provides a Fe | FeCl2|NaFeCl4-FeCl3(NaFeCl4:FeCl3Graphite molten salt battery 1:0.5 |. The negative electrode of the battery is metallic Fe porous foam with the thickness of 1mm and the pore diameter of about 0.2mm, and the electrolyte is FeCl which is pre-added3FeCl is obtained by uniformly mixing NaCl and NaCl in an inert atmosphere (argon) protective glove box according to the molar ratio of 1.5:1 and then heating to 200 DEG C3Excess NaFeCl4The electrolyte and the positive electrode are film graphite electrodes made of natural graphite powder mixed with 10 weight percent of polytetrafluoroethylene binder. During assembly, FeCl pre-melted in advance is directly pre-melted3Excess NaFeCl4Electrolyte is added between the positive and negative electrodes of the cell, after which the cell is sealed in an inert atmosphere protective glove box. When the battery is tested, the temperature is directly raised to 170 ℃, and then the electrochemical performance test is started.
Fig. 4 is a typical charge-discharge voltage curve of this cell at 0.33C rate. Fig. 4 shows that the equilibrium voltage of the cell is about 1.5V. Fig. 5 is data of charge capacity, discharge capacity and coulombic efficiency of the battery at different charge and discharge rates as a function of cycle. Fig. 5 shows that the capacity of the battery is about 3Ah at 0.33C discharge, the charge-discharge capacity gradually decreases with increasing discharge rate, the capacity decreases to about 2Ah at 1C discharge rate, but the battery capacity returns to the initial capacity when the battery returns to 0.33C discharge, which indicates that the battery uses NaCl: FeCl3<The electrolyte of 1 has very good rate capability.
Example 3
This example provides a Fe | FeCl2|LiFeCl4-KFeCl4(LiFeCl4:KFeCl46:4) | graphite molten salt battery. The negative electrode of the battery is metal Fe porous foam with the thickness of 1mm and the pore diameter of about 0.2 mm. The electrolyte is prepared by drying air (H)2O<10ppm) of LiCl, KCl and FeCl3Evenly mixing the materials according to the molar ratio of 0.6:0.4:1, and then heating the mixture to 150 ℃ to obtain LiFeCl4-KFeCl4Mixing the molten salt electrolyte, and cooling the electrolyte for later use. The positive electrode is a plate-shaped graphite electrode made of natural graphite powder mixed with 10 weight percent of polytetrafluoroethylene binder. During assembly, the LiFeCl which is pre-melted in advance is directly pre-melted4-KFeCl4The mixed molten salt electrolyte was added between the positive and negative electrodes of the cell, after which the cell was sealed in dry air. Due to this LiFeCl4-KFeCl4The mixed molten salt electrolyte has a melting point of less than about 120 c so that the cell can be operated at 120 c. When the battery is tested, the temperature is directly increased to 120 ℃, and then the electrochemical performance test is started.
Fig. 6 is a typical charge-discharge voltage curve of this cell at 0.25C rate. Fig. 6 shows that the equilibrium voltage of the cell is about 1.5V. Fig. 7 is data of the charge capacity, discharge capacity and coulombic efficiency of the battery as cycles progress. FIG. 7 shows that the cell capacity is about 9Ah, and that it is operating stably at a coulombic efficiency of greater than 99% for about 1900 times, which is a sufficient indication that the cell is being used with LiFeCl4-KFeCl4Cycling stability at 120 ℃ after mixing of the molten salt electrolyte.
Example 4
This example provides a Fe | FeCl2|NaFeCl4And | graphite molten salt battery. The negative electrode of the battery is metal Fe porous foam with the thickness of 1mm and the pore diameter of about 0.2 mm. The electrolyte is prepared by drying air (H)2O<10ppm) NaCl, and FeCl3Uniformly mixing according to the molar ratio of 1:1, and then heating to 200 ℃ to obtain NaFeCl4The molten salt electrolyte is mixed and cooled for later use. The positive electrode is a film-shaped graphite electrode made of natural graphite powder mixed with 10 weight percent of polytetrafluoroethylene binder. During assembly, the NaFeCl pre-melted in advance is directly used4Molten salt electrolyte additionBetween the positive and negative electrodes of the cell, the cell was then sealed under an inert atmosphere (nitrogen) protection. When the battery is tested, the temperature is directly raised to 170 ℃, and then the electrochemical performance test is started.
Fig. 8 is a typical charge-discharge voltage curve of this cell at 0.5C rate. Fig. 8 shows that the equilibrium voltage of the cell is about 1.5V. Fig. 9 is data of the charge capacity, discharge capacity and coulombic efficiency of the battery as the cycle progresses. FIG. 9 shows that the cell capacity is about 1.05Ah, operating stably for 200 times at coulombic efficiencies greater than 99%, showing that the cell is employing NaFeCl4Cycling stability when melting a salt electrolyte.
Claims (10)
1.LiFeCl4、NaFeCl4And KFeCl4One or more molten salts in the molten salt battery.
2. Use according to claim 1, wherein said LiFeCl4、NaFeCl4And KFeCl4One or more molten salts in the molten salt battery are used in the electrolyte of the molten salt battery.
3. A molten salt battery comprising a positive electrode, a negative electrode, and an electrolyte comprising LiFeCl4、NaFeCl4And KFeCl4One or more molten salt electrolytes.
4. The molten salt battery of claim 3 wherein the electrolyte further comprises one or more of LiCl, NaCl and KCl;
preferably, the total mole number of one or more of LiCl, NaCl and KCl and the LiFeCl4、NaFeCl4And KFeCl4The proportion of the total moles of one or more substances in the molten salt electrolyte is (0-2): 1, the total mole number of one or more of LiCl, NaCl and KCl is not 0.
5. The molten salt battery of claim 3 wherein the electrolyte further comprises FeCl3；
Preference is given toGround, the FeCl3With said LiFeCl4、NaFeCl4And KFeCl4The proportion of the total moles of one or more substances in the molten salt electrolyte is (0-2): 1, said FeCl3The number of moles of (a) is different from 0.
6. The molten salt battery of claim 3 wherein the negative electrode is formed from a substance containing elemental Fe.
7. The molten salt battery of claim 3 wherein the positive electrode is formed from a graphite-based material.
8. The molten salt battery of claim 7 wherein the positive electrode is formed from a material selected from graphite, graphene, carbon nanotubes, graphite felt, and carbon felt.
9. The molten salt battery of claim 3 wherein the LiFeCl4The molten salt electrolyte is prepared by mixing LiCl and FeCl3Heating under the protection of dry air or inert atmosphere to obtain the product; the NaFeCl4The molten salt electrolyte is prepared by mixing NaCl and FeCl3Heating under the protection of dry air or inert atmosphere to obtain the product; the KFeCl4The molten salt electrolyte is prepared by mixing KCl and FeCl3Heating under the protection of dry air or inert atmosphere.
10. The molten salt battery of claim 3 wherein the operating temperature of the molten salt battery is 80-200 ℃.
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|---|---|---|---|---|
| KR20230013888A (en) * | 2021-07-20 | 2023-01-27 | 한국과학기술연구원 | Lithium ion conductive halide-based solid electrolyte and method for synthesizing the same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101523644A (en) * | 2006-08-11 | 2009-09-02 | 加州理工学院 | Dissociating agents, formulations and methods providing enhanced solubility of fluorides |
| CN104577196A (en) * | 2015-01-09 | 2015-04-29 | 厦门大学 | High-voltage sodium-carbon fluoride secondary battery |
| WO2016064474A1 (en) * | 2014-10-24 | 2016-04-28 | Battelle Memorial Institute | Methods and compositions for lithium ion batteries |
| CN105632780A (en) * | 2016-01-05 | 2016-06-01 | 北京金吕能源科技有限公司 | Low temperature inorganic fused salt aluminium ion supercapacitor battery and preparation method therefor |
-
2019
- 2019-06-11 CN CN201910500613.4A patent/CN112072189B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101523644A (en) * | 2006-08-11 | 2009-09-02 | 加州理工学院 | Dissociating agents, formulations and methods providing enhanced solubility of fluorides |
| WO2016064474A1 (en) * | 2014-10-24 | 2016-04-28 | Battelle Memorial Institute | Methods and compositions for lithium ion batteries |
| CN104577196A (en) * | 2015-01-09 | 2015-04-29 | 厦门大学 | High-voltage sodium-carbon fluoride secondary battery |
| CN105632780A (en) * | 2016-01-05 | 2016-06-01 | 北京金吕能源科技有限公司 | Low temperature inorganic fused salt aluminium ion supercapacitor battery and preparation method therefor |
Non-Patent Citations (1)
| Title |
|---|
| LEIGANG XUE等: "Ionic Liquid Redox Catholyte for High Energy Efficiency,Low-Cost Energy Storage", 《ADVANCED ENERGY MATERIALS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230013888A (en) * | 2021-07-20 | 2023-01-27 | 한국과학기술연구원 | Lithium ion conductive halide-based solid electrolyte and method for synthesizing the same |
| KR102597452B1 (en) | 2021-07-20 | 2023-11-03 | 한국과학기술연구원 | Lithium ion conductive halide-based solid electrolyte and method for synthesizing the same |
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