CN110272056A - Preparation method of lithium tetrafluoroborate - Google Patents
Preparation method of lithium tetrafluoroborate Download PDFInfo
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- CN110272056A CN110272056A CN201910709348.0A CN201910709348A CN110272056A CN 110272056 A CN110272056 A CN 110272056A CN 201910709348 A CN201910709348 A CN 201910709348A CN 110272056 A CN110272056 A CN 110272056A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/06—Boron halogen compounds
- C01B35/063—Tetrafluoboric acid; Salts thereof
- C01B35/066—Alkali metal tetrafluoborates
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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
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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
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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
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Abstract
The invention discloses a preparation method of lithium tetrafluoroborate, which comprises the following steps: preparing a tetrafluoroboric acid solution, adding lithium fluoride and boron trifluoride into an organic solvent, and reacting to generate tetrafluoroboric acid and obtain a reaction solution in which the tetrafluoroboric acid is dissolved in the organic solvent; removing water, namely adding a water removal additive into the reaction solution generated in the step A for water removal; filtering impurities, namely performing pressure filtration on the dehydrated solution by using a pressure device to remove excessive lithium fluoride or other impurities in the solution; concentrating, namely concentrating and degassing the solution with impurities removed to precipitate lithium tetrafluoroborate; and (4) crystallizing and drying, namely cooling and crystallizing the concentrated solution, filtering to obtain lithium tetrafluoroborate, and drying to obtain anhydrous lithium tetrafluoroborate. The purity of the lithium tetrafluoroborate prepared by the method reaches more than 99.8 percent, the product quality is improved, the production cost is reduced, and the production safety is improved.
Description
Technical field
The present invention relates to lithium battery production technical field, especially a kind of LiBF4 for making lithium cell electrolyte
Preparation method.
Background technique
There are many electrolyte that lithium ion battery uses, and wherein lithium hexafluoro phosphate is most common electrolyte lithium salt, it is right
Cathode is stablized, and has the characteristics that discharge capacity is big, conductivity is high, internal resistance is small and charge/discharge speed is fast, however lithium hexafluoro phosphate pair
Moisture and hydrofluoric acid are extremely sensitive, non-refractory, and are easy to happen decomposition reaction.LiBF4 is as electrolyte, warm
Stability is preferable, insensitive to environment moisture content, can effectively prevent corroding, and appropriate LiBF4 is added into electrolyte
The cryogenic property of electrolyte can be significantly increased.LiBF4 and being used cooperatively for lithium hexafluoro phosphate can make lithium ion battery
Performance be improved significantly, be hopeful to develop into miniature, energy storage and power lithium-ion battery in civilian, military and three boat fields
The outstanding electrolyte system that field is widely used in extreme circumstances.
Currently, the preparation method of LiBF4 routine has solid-vapor contact method, aqua-solution method etc..Wherein, solid phase-
Gas phase contact method the high requirements on the equipment crosses range request strict control, and reaction is uneven, and production efficiency is lower；Using aqueous solution
During method is synthetically prepared LiBF4, since LiBF4 is gone out in the form of a water object or three water objects in aqueous solution
Existing, not only purity is low, and subsequent dry water removal is also extremely difficult, is used for lithium ion battery as electrolyte, is easy to cause
Battery occurs under conditions of lower voltage with many side reactions, and cycle performance is caused to decline.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of preparation methods of LiBF4, are produced into reducing
Originally, improve product qualities, promote production security.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
A kind of preparation method of LiBF4, specifically includes the following steps:
A. tetrafluoro boric acid solution is prepared, lithium fluoride and boron trifluoride are added in organic solvent, reacts it, is generated
Tetrafluoro boric acid, and obtain making the reaction solution of tetrafluoro boric acid dissolution in organic solvent；
B. moisture removal is removed, is added in the reaction solution that step A is generated except water additive is removed water；
C. impurity screening carries out pressure filtration, excessive fluorine in solution of going out using pressurizing device to the solution after water removal
Change lithium or other impurity；
D. it is concentrated, the solution for removing impurity is subjected to concentration degassing, LiBF4 is precipitated；
E. crystallizing and drying carries out decrease temperature crystalline to the solution after concentration, LiBF4 is obtained by filtration, and be dried,
Obtain waterless lithium terafluoroborate.
A kind of preparation method of above-mentioned LiBF4, organic solvent described in step A be ethyl acetate, methyl acetate,
At least one of propyl acetate, dimethyl carbonate, diethyl carbonate, ethyl acetate and methyl ethyl carbonate.
The preparation method of above-mentioned a kind of LiBF4, except water additive is isocyanide ester, isonitrile chemical combination described in step B
At least one of object and carbodiimide compound.
A kind of preparation method of above-mentioned LiBF4, described except water additive is one of following structural formula:
Represent the first structure formula of different nitrile compounds: X1-N+ ≡ C-
Wherein, X1 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy
One of group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is
Alkyl or alkenyl group；
Represent the second structural formula of different nitrile compounds:
Wherein, X2 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy
One of group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is
Alkyl or alkenyl group；
Represent the third structural formula of two different nitrile compounds:
Wherein, X3 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, ether base
Group (- R1-O-R2), cyanoalkyl group, cyano-aryl group, carbonate group (- R1OCOOR2-), carboxylate group (-
One of R1COOR2-)；R1 and R2 is alkyl or alkenyl group；
Represent the 4th structural formula of two different nitrile compounds:
Wherein, X5, X6 are alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alcoxyl
One of base group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1
It is alkyl or alkenyl group.
A kind of preparation method of above-mentioned LiBF4, it is described except the additive amount of water additive is relative to described in step B
Amount of moisture in reaction solution is with molar ratio for 1~10:1.
A kind of preparation method of above-mentioned LiBF4, in step B, in removal process, the temperature of reaction solution is maintained at
40~60 DEG C.
A kind of preparation method of above-mentioned LiBF4, in step D, solution is in the guarantor of inert gas in concentration process
Shield is lower to be carried out, and vapo(u)rizing temperature is 40-120 DEG C, and vacuum degree is -10KPa~-90KPa, and liquid concentration amount is the 10-40% of solution.
A kind of preparation method of above-mentioned LiBF4, furnace drying method described in step E are vacuum drying, dry temperature
Degree is 50-120 DEG C, and vacuum degree is -30kpa~-90kpa, and drying time is 2~5h.
Due to using above technical scheme, the invention technological progress is as follows.
The present invention removes water additive by being added in making reaction solution made of lithium fluoride and boron trifluoride reaction, thus
So that reaction yield improves, reaction process becomes prone to control, while can also be by LiBF4Moisture concentration be reduced to 20ppm
Below；The available recycling of organic solvent used in production process simultaneously recycles, and reduces the harm to environment, has behaviour
Make simplicity, be easily achieved feature, and the LiBF4 purity prepared reaches 99.8% or more, improves product qualities, reduces
Production cost, improves production security.
Specific embodiment
A kind of preparation method of LiBF4 is used to prepare LiBF4, and the LiBF4 of preparation is as electrolysis
Matter is applied in the production of lithium ion battery, improves the performance of lithium ion battery.The preparation method specifically includes following step
It is rapid:
A. tetrafluoro boric acid solution is prepared, lithium fluoride and boron trifluoride are added in organic solvent, reacts it, is generated
Tetrafluoro boric acid, and obtain making the reaction solution of tetrafluoro boric acid dissolution in organic solvent.
Organic solvent in this step is ethyl acetate, methyl acetate, propyl acetate, dimethyl carbonate, diethyl carbonate
At least one of with methyl ethyl carbonate.
B. moisture removal is removed, is added in the reaction solution that step A is generated except water additive is removed water；Except water additive
Additive amount is relative to the amount of moisture in the reaction solution with molar ratio for 1~10:1；In removal process, the temperature of reaction solution
It is maintained at 40~60 DEG C.
Described in this step except water additive be isocyanide ester, carbomethoxyisopropyl isonitrate and carbodiimide compound at least
One kind, preferably different nitrile compounds.
Different nitrile compounds are one of following structural formula:
Represent the first structure formula of different nitrile compounds: X1-N+ ≡ C-
Wherein, X1 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy
One of group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is
Alkyl or alkenyl group.
First structure formula is such as compound one of shown in following formula (1-1)~(1-10), but is not limited only to following several
Formula.
Represent the second structural formula of different nitrile compounds:
Wherein, X2 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy
One of group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is
Alkyl or alkenyl group
Second structural formula is such as compound one of shown in following formula (2-1)~(2-5), but is not limited only to following several
Formula.
Represent the third structural formula of two different nitrile compounds:
Wherein, X3 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, ether base
Group (- R1-O-R2), cyanoalkyl group, cyano-aryl group, carbonate group (- R1OCOOR2-), carboxylate group (-
One of R1COOR2-)；R1 and R2 is alkyl or alkenyl group.
Third structural formula is such as compound one of shown in following formula (3-1)~(3-3), but is not limited only to following several
Formula.
Represent the 4th structural formula of two different nitrile compounds:
Wherein, X5, X6 are alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alcoxyl
One of base group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1
It is alkyl or alkenyl group.
4th structural formula is such as compound one of shown in following formula (4-1)~(4-2), but is not limited only to following two
Formula.
C. impurity screening carries out pressure filtration, excessive fluorine in solution of going out using pressurizing device to the solution after water removal
Change lithium or other impurity.The Filters used in filter process is PP, nylon or PTFE materials.
D. it is concentrated, the solution for removing impurity is subjected to concentration degassing, LiBF4 is precipitated；Solution is in concentration process
It is carried out under the protection of inert gas, vapo(u)rizing temperature is 40-120 DEG C, and vacuum degree is -10KPa~-90KPa, and liquid concentration amount is
The 10-40% of solution.
E. crystallizing and drying carries out decrease temperature crystalline to the solution after concentration, LiBF4 is obtained by filtration, and be dried,
Obtain waterless lithium terafluoroborate.Furnace drying method when wherein drying is using vacuum drying, and dry temperature is 50-120 DEG C, vacuum
Degree is -30kpa~-90kpa, and drying time is 2~5h.
Below in conjunction with specific embodiment, the present invention will be described in further detail.
Embodiment 1
A kind of preparation method of LiBF4, specifically includes the following steps.
A. into reaction unit, closed addition 950g, moisture content are the ethyl acetate of 52ppm, then put into 50g lithium fluoride, described
Lithium fluoride is high purity lithium fluoride, and high-purity is greater than 99.5%, and under normal temperature and pressure, starting stirring, revolving speed is 30~80rpm, is obtained
Lithium fluoride suspension, (mass fraction 5%).143g boron triflouride gas is slowly introducing in fluorination lithium fluoride suspension, instead
120min between seasonable, obtains reaction solution.
It is the organic solvent solution dissolved with tetrafluoro boric acid in the reaction solution, the moisture content for detecting acquired solution is 64ppm.
B. in the reaction solution of reaction unit be added 1g (1-1) chemical formula carbomethoxyisopropyl isonitrate, reacted at 50 DEG C to
Solution moisture content is down to 5ppm or less.
C. reaction solution obtained by step B is imported in filter device under nitrogen protection, pressurizeed using pressurizing device
Filter removes excessive lithium fluoride or other impurity in solution.
D. filtrate imports inspissator under nitrogen protection；It heats up to filtrate, opens vacuum pump, inspissator temperature is raised to
80 DEG C, vacuum degree is -70KPa, carries out concentration degassing；Liquid concentration amount is the 10% of solution, and LiBF4 is precipitated.
E. inspissator is carried out being cooled to 20 DEG C, the resulting concentrate of step D be concentrated by evaporation repeatedly and is filtered, until
Crystal all steams, and filters to obtain tetrafluoro boric acid crystalline lithium；Crystal is entered in vacuum desiccator under nitrogen protection, drying temperature
Control is at 50 DEG C, and vacuum degree control is in -60kpa；Drying time 5h is dry to complete to measure to obtain 170.3g LiBF4
LiBF4 obtained by the present embodiment is detected, the purity of detection is 99.9%, moisture 12ppm, Fe <
1ppm, Cr < 1ppm, Ni < 1ppm.
Embodiment 2
A kind of preparation method of LiBF4, includes the following steps.
A. into reaction unit, the closed 950g moisture content that is added is the dimethyl carbonate of 40ppm, then puts into 50g lithium fluoride, institute
Stating lithium fluoride is high purity lithium fluoride, and high-purity is greater than 99.5%, and under normal temperature and pressure, starting stirring, revolving speed is 30~80rpm,
It obtains lithium fluoride suspension (mass fraction 5%)；149g boron triflouride gas is slowly introducing in lithium fluoride suspension, when reaction
Between 160min, obtain reaction solution.
It is the organic solvent solution dissolved with tetrafluoro boric acid in the reaction solution, the moisture content for detecting acquired solution is 52ppm.
B. the carbomethoxyisopropyl isonitrate of 1g (2-2) formula is added in the reaction solution of reaction unit, reacts at 50 DEG C to solution
Moisture content is down to 5ppm or less.
C. reaction solution obtained by step B is imported in filter device under nitrogen protection, pressurizeed using pressurizing device
Filter removes excessive lithium fluoride or other impurity in solution.
D. filtrate imports inspissator under nitrogen protection；It heats up to filtrate, opens vacuum pump, inspissator temperature is raised to
60 DEG C, vacuum degree is -90KPa, carries out concentration degassing；Liquid concentration amount is the 20% of solution, and LiBF4 is precipitated.
E. inspissator is carried out being cooled to 20 DEG C, the resulting concentrate of D will be walked and carry out being concentrated by evaporation filtering, Zhi Daojing repeatedly
Body all steams, and filters to obtain tetrafluoro boric acid crystalline lithium；Crystal is entered in vacuum desiccator under nitrogen protection, drying temperature control
System is at 70 DEG C, and vacuum degree control is in -60kpa；Drying time 5h is dry to complete to measure to obtain 171.4g LiBF4
LiBF4 obtained by the present embodiment is detected, the purity of detection is 99.9%, moisture 12ppm, Fe <
1ppm, Cr < 1ppm, Ni < 1ppm.
Embodiment 3
A kind of preparation method of LiBF4, includes the following steps.
A. into reaction unit, closed addition 950g, moisture content are the dimethyl carbonate of 40ppm, then put into 50g lithium fluoride, institute
Stating lithium fluoride is high purity lithium fluoride, and high-purity is greater than 99.5%, and under normal temperature and pressure, starting stirring, revolving speed is 30~80rpm,
Obtain lithium fluoride suspension, (mass fraction 5%)；156g boron triflouride gas is slowly introducing in lithium fluoride suspension, is reacted
Time 160min, obtains reaction solution.
It is the organic solvent solution dissolved with tetrafluoro boric acid in the reaction solution, the moisture content for detecting acquired solution is 56ppm.
B. two carbomethoxyisopropyl isonitrates of 1g (3-1) formula are added in the reaction solution of reaction unit, react at 50 DEG C to molten
Liquid moisture content is down to 5ppm or less.
C. reaction solution obtained by step B is imported in filter device under nitrogen protection, pressurizeed using pressurizing device
Filter removes excessive lithium fluoride or other impurity in solution.
D. filtrate imports inspissator under nitrogen protection；It heats up to filtrate, opens vacuum pump, inspissator temperature is raised to
60 DEG C, vacuum degree is -70KPa, carries out concentration degassing；Liquid concentration amount is the 10% of solution, and LiBF4 is precipitated.
E. inspissator is carried out being cooled to 20 DEG C, the resulting concentrate of step D be concentrated by evaporation repeatedly and is filtered, until
Crystal all steams, and filters to obtain tetrafluoro boric acid crystalline lithium；Crystal is entered in vacuum desiccator under nitrogen protection, drying temperature
Control is at 70 DEG C, and vacuum degree control is in -60kpa；Drying time 5h is dry to complete to measure to obtain 172.6g LiBF4。
LiBF4 obtained by the present embodiment is detected, the purity of detection is 99.9%, moisture 12ppm, Fe <
1ppm, Cr < 1ppm,Ni<1ppm。
Embodiment 4
A kind of preparation method of LiBF4, includes the following steps.
A. into reaction unit, closed addition 950g, moisture content are the diethyl carbonate of 30ppm, then put into 50g lithium fluoride, institute
Stating lithium fluoride is high purity lithium fluoride, and high-purity is greater than 99.5%, and under normal temperature and pressure, starting stirring, revolving speed is 30~80rpm,
Obtain lithium fluoride suspension, (mass fraction 5%)；165g boron triflouride gas is slowly introducing in lithium fluoride suspension, is reacted
Time 120min, obtains reaction solution.
It is the organic solvent solution dissolved with tetrafluoro boric acid in the reaction solution, the moisture content for detecting acquired solution is 48ppm.
B. the compound of 0.75g (4-1) formula is added in the reaction solution of reaction unit, reacts at 60 DEG C to solution water
Part is down to 5ppm or less.
C. reaction solution obtained by step B is imported in filter device under nitrogen protection, pressurizeed using pressurizing device
Filter removes excessive lithium fluoride or other impurity in solution.
D. filtrate imports inspissator under nitrogen protection；It heats up to filtrate, opens vacuum pump, inspissator temperature is raised to
70 DEG C, vacuum degree is -70KPa, carries out concentration degassing；Liquid concentration amount is the 10% of solution, and LiBF4 is precipitated.
E. inspissator is carried out being cooled to 20 DEG C, the resulting concentrate of step D be concentrated by evaporation repeatedly and is filtered, until
Crystal all steams, and filters to obtain tetrafluoro boric acid crystalline lithium；Crystal is entered in vacuum desiccator under nitrogen protection, drying temperature
Control is at 70 DEG C, and vacuum degree control is in -60kpa；Drying time 6h is dry to complete to measure to obtain 170.3g LiBF4.
LiBF4 obtained by the present embodiment is detected, the purity of detection is 99.9%, moisture 12ppm, Fe <
1ppm, Cr < 1ppm, Ni < 1ppm.
Claims (8)
1. a kind of preparation method of LiBF4, which is characterized in that specifically includes the following steps:
A. tetrafluoro boric acid solution is prepared, lithium fluoride and boron trifluoride are added in organic solvent, reacts it, generates tetrafluoro
Boric acid, and obtain making the reaction solution of tetrafluoro boric acid dissolution in organic solvent；
B. moisture removal is removed, is added in the reaction solution that step A is generated except water additive is removed water；
C. impurity screening carries out pressure filtration, excessive lithium fluoride in solution of going out using pressurizing device to the solution after water removal
Or other impurity；
D. it is concentrated, the solution for removing impurity is subjected to concentration degassing, LiBF4 is precipitated；
E. crystallizing and drying carries out decrease temperature crystalline to the solution after concentration, LiBF4 is obtained by filtration, and be dried, obtains
Waterless lithium terafluoroborate.
2. a kind of preparation method of LiBF4 according to claim 1, which is characterized in that organic described in step A
Solvent is in ethyl acetate, methyl acetate, propyl acetate, dimethyl carbonate, diethyl carbonate, ethyl acetate and methyl ethyl carbonate
At least one.
3. a kind of preparation method of LiBF4 according to claim 1, which is characterized in that removed water described in step B
Additive is at least one of isocyanide ester, carbomethoxyisopropyl isonitrate and carbodiimide compound.
4. a kind of preparation method of LiBF4 according to claim 3, which is characterized in that described except water additive is
One of following structural formula:
Represent the first structure formula of different nitrile compounds: C1-N+ ≡ C-
Wherein, X1 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy base
One of (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is alkyl
Or alkenyl group；
Represent the second structural formula of different nitrile compounds:
Wherein, X2 is alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy base
One of (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is alkyl
Or alkenyl group；
Represent the third structural formula of two different nitrile compounds:
Wherein, X3 be alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, ether group (-
R1-O-R2), cyanoalkyl group, cyano-aryl group, carbonate group (- R1OCOOR2-), carboxylate group (-
One of R1COOR2-)；R1 and R2 is alkyl or alkenyl group；
Represent the 4th structural formula of two different nitrile compounds:
Wherein, X5, X6 are alkyl group, alkenyl group, halogenated alkyl group, aryl group, halogenated aryl group, alkoxy base
One of group (- OR1), cyano group (- CN), carbonate group (- OCOOR1), carboxylate group (- COOR1)；R1 is alkane
Base or alkenyl group.
5. a kind of preparation method of LiBF4 according to claim 4, which is characterized in that in step B, the water removal
The additive amount of additive is relative to the amount of moisture in the reaction solution with molar ratio for 1~10:1.
6. a kind of preparation method of LiBF4 according to claim 4, which is characterized in that in step B, removal process
In, the temperature of reaction solution is maintained at 40~60 DEG C.
7. a kind of preparation method of LiBF4 according to claim 1, which is characterized in that in step D, solution is dense
It is carried out under protection in compression process in inert gas, vapo(u)rizing temperature is 40-120 DEG C, and vacuum degree is -10KPa~-90KPa, liquid
Body concentration amount is the 10-40% of solution.
8. a kind of preparation method of LiBF4 according to claim 1, which is characterized in that baking described in step E
Drying method is vacuum drying, and dry temperature is 50-120 DEG C, and vacuum degree is -30kpa~-90kpa, and drying time is 2~5h.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103733416A (en) * | 2011-08-03 | 2014-04-16 | 中央硝子株式会社 | Method for producing lithium tetrafluoroborate solution |
| US20180198163A1 (en) * | 2015-07-01 | 2018-07-12 | Gotion Inc. | Non-aqueous electrolytes for lithium-ion batteries comprising an isocyanide |
| CN109264736A (en) * | 2018-11-14 | 2019-01-25 | 东营石大胜华新能源有限公司 | A kind of preparation method of LiBF4 |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103733416A (en) * | 2011-08-03 | 2014-04-16 | 中央硝子株式会社 | Method for producing lithium tetrafluoroborate solution |
| US20180198163A1 (en) * | 2015-07-01 | 2018-07-12 | Gotion Inc. | Non-aqueous electrolytes for lithium-ion batteries comprising an isocyanide |
| CN109264736A (en) * | 2018-11-14 | 2019-01-25 | 东营石大胜华新能源有限公司 | A kind of preparation method of LiBF4 |
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