CN111342133B - Novel non-aqueous electrolyte for lithium ion battery and lithium ion battery - Google Patents
Novel non-aqueous electrolyte for lithium ion battery and lithium ion battery Download PDFInfo
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- CN111342133B CN111342133B CN202010160359.0A CN202010160359A CN111342133B CN 111342133 B CN111342133 B CN 111342133B CN 202010160359 A CN202010160359 A CN 202010160359A CN 111342133 B CN111342133 B CN 111342133B
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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
- H01M10/052—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
- 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
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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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 invention relates to a novel non-aqueous electrolyte for a lithium ion battery and the lithium ion battery, which comprise a basic electrolyte and an additive A, wherein the additive A is a compound with a disulfonic acid thioester structure, the addition amount of the additive A is 0.5-3% of the total mass of the electrolyte, and the basic electrolyte comprises electrolyte lithium salt and a non-aqueous organic solvent. The lithium ion battery electrolyte additive provided by the invention can generate oxidation-reduction reaction on the surfaces of a positive electrode and a negative electrode to form an interface protective film, and the interface film has low content of organic components and small polymer molecules on the interface film, so that the interface film has good high-temperature stability and low impedance, and can improve the battery cycle and high-low temperature performance at the same time.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a novel non-aqueous electrolyte for a lithium ion battery and the lithium ion battery using the electrolyte.
Background
In recent years, the application field of lithium ion batteries is rapidly expanded, and particularly, in the application of electric vehicles, large-scale energy storage power stations and the like in other aspects, the demand for high energy density of the batteries is more urgent. The lithium battery anode mainly uses a ternary material, lithium manganate and lithium iron phosphate, wherein the ternary material is a material system which is mainly developed by various manufacturers by means of a voltage platform high voltage platform, high energy density, high tap density, excellent low temperature performance and the like.
The ternary polymer lithium battery refers to a positive electrode material of nickel cobalt lithium manganate (Li (NiCoMn) O2) Or the lithium battery of the ternary anode material of nickel cobalt lithium aluminate, along with the requirement of the energy density of the battery being higher and higher in recent years, the nickel content of the ternary anode material is higher and higher, the structural stability of the anode material is reduced, meanwhile, the compaction density of the anode material and the cathode material is higher and higher, and the liquid retention capacity of the electrolyte is lower. Therefore, the requirements on the electrolyte are higher and higher, and the stability of the battery is improved by adding special additives into the electrolyte to modify the interfaces of the anode, the cathode and the electrolyte, so that the service life of the battery is prolonged, and the safety performance of the battery is improved.
There are also many reports in the prior patent literature on improving the stability of the electrolyte by adding additives to the electrolyte, thereby improving the safety performance of the lithium ion battery, such as:
patent CN 105794035B discloses an electrolyte for a secondary battery comprising at least one open-chain sulfone compound having 4 or more carbon atoms, at least one open-chain sulfone compound having 3 or less carbon atoms and at least one carbonate compound, and a secondary battery using the same, which is excellent in long-term cycle characteristics under high temperature conditions.
The invention patent CN 109037776A discloses an electrolyte and a battery comprising the electrolyte, wherein the electrolyte comprises an organic solvent, electrolyte salt and an additive, the additive comprises a disulfonyl compound and a cyclic sulfate compound, and the disulfonyl compound and the cyclic sulfate compound are used in a matching way, so that the cycle performance of the battery under high voltage is improved obviously, the high-temperature storage performance of the battery is improved obviously, and the high-temperature safety performance of the battery under high voltage is improved.
Although the additives disclosed in the above documents include sulfone compounds and even disulfone compounds, they are used in combination with ester compounds, but the ester compounds have high viscosity and poor electrochemical stability, and may affect other performances of the lithium ion battery.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides an electrolyte, and a compound containing a disulfonic acid thioester structure is added into the electrolyte, so that the cycle performance and the high-temperature performance of a ternary polymer lithium battery can be obviously improved. In order to achieve the purpose, the invention is realized by the following technical scheme:
the novel non-aqueous electrolyte for the lithium ion battery is characterized by comprising a base electrolyte and an additive A, wherein the additive A is a compound with a disulfonic acid thioester structure and has a general structural formula shown in a chemical formula (1):
wherein R is1、R2Each independently selected from 1 to 5 carbonsOne of an alkyl group having an atom and a haloalkyl group having 1 to 5 carbon atoms, wherein R is1、R2In the case of haloalkyl, halo is partially or fully substituted.
For R1And R2Examples of alkyl groups include the following groups: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl and the like. Of these, methyl is preferred because good solubility and compatibility can be achieved.
In the case of the haloalkyl group, there is no particular limitation on the type of the halogen, but it is preferably fluorine, chlorine or bromine, more preferably fluorine. This is because fluorine can achieve higher effects than other halogens. The number of halogen atoms is preferably 2, and may be 3 or more. This is because the ability to form a protective film is increased and a stronger, more stable protective film is formed, thereby better suppressing the decomposition reaction of the electrolytic solution.
The compounds with any structures shown above can be used as components of additives and applied to lithium ion batteries. In specific applications, a single compound may be used as the electrolyte additive, or the additive may be used in combination with other compounds as the electrolyte additive.
Further, the additive a is a compound having the following chemical formula (2) or chemical formula (3) or a mixture of both:
namely R in the chemical formula (1)1And R2Each independently is-CH3and-CF3。
Furthermore, the additive A is added in an amount of 0.1-10% of the total amount of the electrolyte.
Furthermore, the additive A is added in an amount of 0.5-3% of the total amount of the electrolyte.
Further, the basic electrolyte comprises electrolyte lithium salt and a non-aqueous organic solvent, wherein the non-aqueous organic solvent is one or a combination of several of Ethylene Carbonate (EC), Propylene Carbonate (PC), Butylene Carbonate (BC), dimethyl carbonate (DMC), diethyl carbonate (DEC), Ethyl Methyl Carbonate (EMC), Methyl Propyl Carbonate (MPC), gamma-butyrolactone (GBL), Methyl Acetate (MA), Ethyl Acetate (EA), propyl acetate (EP), butyl acetate, ethyl propionate, propyl propionate and butyl propionate.
Further, the non-aqueous organic solvent is composed of Ethylene Carbonate (EC), diethyl carbonate (DEC) and Ethyl Methyl Carbonate (EMC), ethylene carbonate: diethyl carbonate: the mass ratio of the methyl ethyl carbonate is 3:2: 5.
Further, the electrolyte lithium salt comprises one or more of lithium hexafluorophosphate, lithium perchlorate, lithium tetrafluoroborate, lithium bistrifluoromethanesulfonylimide and lithium bistrifluoromethanesulfonylimide.
Further, the electrolyte lithium salt is lithium hexafluorophosphate, and the molar concentration of the lithium hexafluorophosphate in the total amount of the electrolyte is 0.8-1.5 mol/L.
The invention also provides a lithium ion battery, which comprises the novel non-aqueous electrolyte for the lithium ion battery, a positive electrode, a negative electrode and a diaphragm.
Ethylene carbonate, known by the english name Ethylene carbonate, abbreviated as EC;
propylene carbonate, having the english name Propylene carbonate, abbreviated PC;
butenoic acid, known by the english name 2,3-Butylene carbonate, abbreviated as BC;
dimethyl carbonate, known by the english name dimethyl carbonate, abbreviated DMC;
diethyl carbonate, known by the english name Diethyl carbonate, abbreviated to DEC;
ethyl Methyl Carbonate, known in english under the name Ethyl Methyl Carbonate, abbreviated EMC;
methylpropyl carbonate, having the english name butan-2-yl carbonate, abbreviated MPC;
gamma-Butyrolactone, having the english name 1,4-Butyrolactone, abbreviated GBL;
methyl acetate, english name methyl acetate, abbreviated as MA;
ethyl acetate, known by the english name ethyl acetate, abbreviated EA;
propyl acetate, english name Propyl acetate, abbreviated EP;
SEI, known as solid electrolyte interface, solid electrolyte interface.
The invention has the following beneficial effects: the lithium ion battery electrolyte additive provided by the invention is a compound with a disulfonic acid thioester structure, can perform redox reaction on the surfaces of a positive electrode and a negative electrode before the electrolyte, and the decomposition product of the additive is rich in Li2And S, an inorganic component is introduced to the surface of the lithium negative electrode, the component of an SEI (solid electrolyte interface film) is regulated and controlled, the mechanical strength of the SEI is improved, the stability of the SEI is enhanced, the growth of lithium dendrites is inhibited, the service life and the cycle performance of the lithium metal battery are improved, the molecular weight of a polymer formed on the surface of the negative electrode is low, the ion conduction performance is better, and the cycle and high and low temperature performance of the battery can be improved at the same time. .
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
The embodiment of the invention provides a novel non-aqueous electrolyte for a lithium ion battery and a preparation method of the lithium ion battery.
The electrolyte for the high-temperature lithium ion battery used by the invention comprises a basic electrolyte and an additive A, wherein the additive A is selected from a compound with a disulfonic acid thioester structure shown in the following chemical formula (1),
in the formula (1), R1、R2Each independently selected from alkyl with 1-5 carbon atoms and halogenated alkyl with 1-5 carbon atoms, wherein R is1、R2When it is haloalkyl, the halo is partially or fully substituted, wherein R1And R2May be the same as or different from each other.
For R1And R2Examples of alkyl groups include the following groups: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl and the like. Of these, methyl is preferred because good solubility and compatibility can be achieved.
In the case of the haloalkyl group, there is no particular limitation on the type of the halogen, but it is preferably fluorine, chlorine or bromine, more preferably fluorine. This is because fluorine can achieve higher effects than other halogens. The number of halogen atoms is preferably 2, and may be 3 or more. This is because the ability to form a protective film is increased and a stronger, more stable protective film is formed, thereby better suppressing the decomposition reaction of the electrolytic solution.
Wherein the addition amount of the additive A is 0.1-10% of the total amount of the electrolyte, and preferably 0.5-3%.
The base electrolyte includes an electrolytic lithium salt and a non-aqueous organic solvent.
The non-aqueous organic solvent is one or a combination of several of Ethylene Carbonate (EC), Propylene Carbonate (PC), Butylene Carbonate (BC), dimethyl carbonate (DMC), diethyl carbonate (DEC), Ethyl Methyl Carbonate (EMC), Methyl Propyl Carbonate (MPC), γ -butyrolactone (GBL), Methyl Acetate (MA), Ethyl Acetate (EA), propyl acetate (EP), butyl acetate, ethyl propionate, propyl propionate, and butyl propionate, and a mixture thereof is preferable because an electrolyte having high conductivity can be prepared.
Preferred are ethylene carbonate, diethyl carbonate and ethyl methyl carbonate, ethylene carbonate: diethyl carbonate: the mass ratio of the methyl ethyl carbonate is 3:2: 5.
The electrolyte lithium salt comprises one or a combination of more of lithium hexafluorophosphate, lithium perchlorate, lithium tetrafluoroborate, lithium bistrifluoromethanesulfonimide and lithium bistrifluoromethanesulfonimide, preferably lithium hexafluorophosphate, and the molar concentration of the lithium hexafluorophosphate in the total amount of the electrolyte is 0.8-1.5 mol/L.
1. The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples.
(1) Preparation of the electrolyte
The electrolytes of examples 1 to 4 and comparative examples 1 to 4 were prepared as follows:
ethylene Carbonate (EC), diethyl carbonate (DEC) and Ethyl Methyl Carbonate (EMC) were mixed in a mass ratio of EC: DEC: EMC of 3:2:5, and then lithium hexafluorophosphate was added to a molar concentration of 0.8mol/L, the additive including additive A.
Additive a in this example is a compound having the chemical formulas (2) to (3):
the kinds and contents of additives in the electrolytes of examples and comparative examples are shown in table 1, wherein the proportion of the additives is the proportion of the total weight of the electrolyte.
TABLE 1 additives and their contents for examples 1-8 and comparative examples 1-4
(2) Preparation of positive plate
Lithium nickel cobalt manganese oxide (LiNi) was mixed in a mass ratio of 95.5:2:1:0.50.5Co0.2Mn0.3) Super-P (small particle conductive Carbon black), CNT (Carbon nano tube) and PVDF (polyvinylidene fluoride), then dispersing the materials in NMP (N-methyl pyrrolidone), and stirring the materials to be stable and uniform under the action of a vacuum stirrer to obtain positive electrode slurry; uniformly coating the positive electrode slurry on an aluminum foil with the thickness of 16 mu m; and (3) airing the aluminum foil at room temperature, transferring the aluminum foil to a blast oven at 120 ℃ for drying for 2h, and then carrying out cold pressing and die cutting to obtain the positive plate.
(3) Preparation of negative plate
Mixing graphite, Super-P (small particle conductive carbon black), SBR (styrene butadiene rubber) and CMC (carboxymethyl cellulose) according to a mass ratio of 95.5:1.5:1:2, and then dispersing the materials in deionized water to obtain negative electrode slurry; uniformly coating the negative electrode slurry on a copper foil with the thickness of 8 mu m; and (3) airing the copper foil at room temperature, transferring the copper foil into a blast oven at 120 ℃ for drying for 2h, and then carrying out cold pressing and die cutting to obtain the negative plate.
(4) Preparation of lithium ion battery
The method comprises the following steps of obtaining a bare cell by a positive plate, a negative plate and a diaphragm through a lamination process, putting the cell into a packaging shell, injecting electrolyte, sequentially sealing, and obtaining the lithium ion battery through the processes of high-temperature standing, hot cold pressing, formation, capacity grading and the like.
After the preparation was completed, the lithium ion batteries prepared using the electrolytes of examples 1 to 8 and comparative examples 1 to 4 were respectively numbered as nos. 1 to 12, and were ready for performance testing.
2. Test of ordinary temperature cycle Performance
The normal-temperature cycle performance of the No. 1-12 lithium ion battery is tested according to the following method: the normal temperature cycle test is carried out at the temperature of 25 ℃, and the experimental steps are as follows: after charging to 4.6V at a constant current of 1C, charging to a cutoff current of 0.05C at a constant voltage, and then discharging to 3.0V at a constant current of 1C, which is recorded as a charge-discharge cycle. Then 1000 cycles were performed according to the above conditions. The capacity retention (%) after 1000 cycles of the lithium ion battery was ═ 100% (discharge capacity/first discharge capacity at 1000 cycles), and the test results are shown in table 2.
3. High temperature cycle performance test
The high-temperature cycle performance of the No. 1-12 lithium ion battery is tested according to the following method: the high-temperature cycle performance test is carried out at the temperature of 45 ℃, and the experimental steps are as follows: after charging to 4.6V at a constant current of 1C, charging to a cutoff current of 0.05C at a constant voltage, and then discharging to 3.0V at a constant current of 1C, which is recorded as a charge-discharge cycle. Then 1000 cycles were performed according to the above conditions. The capacity retention (%) after 1000 cycles of the lithium ion battery was ═ 100% (discharge capacity/first discharge capacity at 1000 cycles), and the test results are shown in table 2.
4. High temperature storage Performance test
The high-temperature storage performance of the No. 1-12 lithium ion battery is tested according to the following method: charging at room temperature at a constant current and a constant voltage of 1C to 4.6V, stopping at 0.05C, then discharging at a constant current of 1C, stopping at 3V, circularly calculating the average capacity as the initial capacity C0 for three times, and testing the volume of the lithium ion battery as V0; charging the lithium ion battery to 4.6V at room temperature under a constant current and a constant voltage at 1C, stopping charging at 0.05C, then placing the lithium ion battery in a high-temperature test cabinet for 15 days at 60 ℃, taking out the volume of the lithium ion battery to be tested and recording the volume as Vn, wherein the volume expansion rate (%) is (Vn-V0)/V0; after standing at room temperature for 5h, discharging the 1C at constant current to 3V, and recording the discharge capacity C1 and the charge percentage of C1/C0; charging to 4.6V at room temperature under constant current and constant voltage at 1C, stopping at 0.05C, then discharging under constant current at 1C, stopping at 3V, and recording recovery capacity C2; percent recovery was C2/C0 and the results are shown in Table 2.
5. Low temperature Performance test
The low-temperature charging performance of the No. 1-12 lithium ion battery is tested according to the following method: the lithium ion battery is charged to 4.6V by using a 1C constant current and constant voltage, then discharged to 3.0V by using a 1C constant current, and the discharge capacity is recorded. And then charging to 4.6V at constant current and constant voltage of 1C, stopping at 0.05C, placing in an environment at the temperature of minus 20 ℃ for standing for 24 hours, discharging to 2.4V at constant current of 1C, and recording the discharge capacity.
A low-temperature discharge efficiency value of-20 ═ 1C discharge capacity (-20 ℃)/1C discharge capacity (25 ℃) x 100%.
The test results are shown in table 2:
TABLE 2
As can be seen from the test results in table 2, the capacity retention rates of the batteries nos. 1 to 8 at 25 ℃ for 1000 cycles are all above 86%, and the capacities tend to increase with the increase of the content of the additive a, wherein the capacity retention rates of the batteries at 25 ℃ for 1000 cycles of examples 3 (with 2% of the compound of formula (2) added), 4 (with 3% of the compound of formula (2) added), 7 (with 2% of the compound of formula (3) added) and 4 (with 3% of the compound of formula (3) added) are all above 90%; in the examples 1-8, the internal resistance of the battery with the capacity of 1000 cycles at 25 ℃ is below 0.4m omega, and the internal resistance of the battery with the number 9-12 is above 0.9m omega, so that the additive A obviously improves the normal-temperature cycle performance of the battery core.
As can be seen from Table 2, the capacity retention rates of the batteries 1 to 8 are all above 83% and most of the batteries are above 88% when the batteries are cycled for 500 weeks at 45 ℃, the cycling results of the batteries are better, and the batteries show an increasing trend along with the increase of the content of the additive A; the results of the 9-12 batteries are below 74%, and the cycling effect is poor, which shows that the additive A has obvious improvement on the high-temperature cycling performance of the battery core.
From the high-temperature storage data of 60 ℃/7 days tested in table 2, the capacity retention rate and recovery rate of the No. 9-12 lithium ion battery stored at high temperature of 60 ℃/7 days are lower, most of the capacity retention rate and recovery rate are below 90%, the thickness expansion rate is between 6.7% and 10.8%, the cell capacity retention rate of the No. 1-8 lithium ion battery is above 89%, the recovery rate is above 94%, and the capacity retention rate and recovery rate of the two additives after being stored at 60 ℃/7 days show a trend that the retention rate and the recovery rate are correspondingly increased along with the increase of the additive amount. From data, the effects of the two additives of the chemical formula (2) and the chemical formula (3) are not greatly different, the three additives with the same mass are added, the difference between the gas generation volume, the retention rate and the recovery rate is not large in 60 ℃/7 day storage, and the change of the substituent group does not greatly influence the performance of the battery cell.
From the low-temperature charging results in table 2, lithium precipitation occurs in the lithium ion batteries 9-12 to which vinylene carbonate, methylene methanedisulfonate, 1, 3-propane sultone and lithium dioxalate borate are respectively added, while no lithium precipitation occurs in the low-temperature charging of the lithium ion batteries 1-8 to which the compounds of chemical formula (2) and chemical formula (3) are added, and compared with the lithium ion batteries 9-12, the additive a shows a better high-temperature effect without weakening the low-temperature performance, which indicates that the additive a has lower impedance and is more stable at high temperature.
In conclusion, compared with the common additive capable of improving the high-temperature performance, the compound additive A with the thiobisulfonate structure provided by the invention has good high-temperature stability and lower impedance, and can improve the battery cycle and the high-temperature and low-temperature performance at the same time.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and is not intended to limit the practice of the invention to these embodiments. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. The novel non-aqueous electrolyte for the lithium ion battery is characterized by comprising a base electrolyte and an additive A, wherein the additive A is a compound with a disulfonic acid thioester structure and has a general structural formula shown in a chemical formula (1):
chemical formula (1)
Wherein R is1 、R2Each independently selected from one of alkyl with 1 to 5 carbon atoms and halogenated alkyl with 1 to 5 carbon atoms; the basic electrolyte comprises electrolyte lithium salt and a non-aqueous organic solvent, wherein the non-aqueous organic solvent consists of ethylene carbonate, diethyl carbonate and ethyl methyl carbonate; the ethylene carbonate: diethyl carbonate: the mass ratio of the methyl ethyl carbonate is 3:2: 5.
2. The novel nonaqueous electrolyte for lithium ion batteries according to claim 1, wherein the additive a is a compound having the following chemical formula (2) or chemical formula (3) or a mixture of both:
chemical formula (2) chemical formula (3).
3. The novel nonaqueous electrolyte for lithium ion batteries according to claim 1, wherein the additive A is added in an amount of 0.1 to 10% based on the total amount of the electrolyte.
4. The novel nonaqueous electrolyte for lithium ion batteries according to claim 3, wherein the additive A is added in an amount of 0.5 to 3% based on the total amount of the electrolyte.
5. The novel nonaqueous electrolyte for lithium ion batteries according to claim 1, wherein the electrolyte lithium salt comprises one or a combination of several of lithium hexafluorophosphate, lithium perchlorate, lithium tetrafluoroborate, lithium bistrifluoromethanesulfonylimide and lithium bistrifluoromethanesulfonylimide.
6. The novel nonaqueous electrolyte for lithium ion batteries according to claim 5, wherein the electrolyte lithium salt is lithium hexafluorophosphate, and the molar concentration of the lithium hexafluorophosphate in the total amount of the electrolyte solution is 0.8 to 1.5 mol/L.
7. A lithium ion battery comprising the novel nonaqueous electrolyte for lithium ion batteries according to any one of claims 1 to 6, a positive electrode, a negative electrode and a separator.
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| JP2006278106A (en) * | 2005-03-29 | 2006-10-12 | Nec Corp | Electrolyte for secondary battery and secondary battery using the same |
| CN108352573A (en) * | 2015-11-13 | 2018-07-31 | 锡安能量公司 | Additive for electrochemical cell |
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| CN103004006B (en) * | 2011-07-07 | 2014-02-19 | 住友精化株式会社 | Additive for nonaqueous electrolyte, nonaqueous electrolyte, and electricity storage device |
| JP2015046233A (en) * | 2013-08-27 | 2015-03-12 | 日立化成株式会社 | Lithium ion secondary battery, and secondary battery system using the same |
| CN113054250B (en) * | 2019-12-27 | 2023-03-10 | 张家港市国泰华荣化工新材料有限公司 | Electrolyte and lithium ion battery |
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| JP2006278106A (en) * | 2005-03-29 | 2006-10-12 | Nec Corp | Electrolyte for secondary battery and secondary battery using the same |
| CN108352573A (en) * | 2015-11-13 | 2018-07-31 | 锡安能量公司 | Additive for electrochemical cell |
| CN109037777A (en) * | 2017-06-12 | 2018-12-18 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
| CN110668978A (en) * | 2019-09-23 | 2020-01-10 | 广州天赐高新材料股份有限公司 | Bis-sulfonate compound, preparation method thereof, electrolyte and energy storage device |
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