CN113067034A - Non-aqueous electrolyte additive, non-aqueous electrolyte and lithium ion battery - Google Patents
Non-aqueous electrolyte additive, non-aqueous electrolyte and lithium ion battery Download PDFInfo
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- CN113067034A CN113067034A CN202110323174.1A CN202110323174A CN113067034A CN 113067034 A CN113067034 A CN 113067034A CN 202110323174 A CN202110323174 A CN 202110323174A CN 113067034 A CN113067034 A CN 113067034A
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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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- 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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
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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 discloses a non-aqueous electrolyte additive, a non-aqueous electrolyte and a lithium ion battery, wherein the non-aqueous electrolyte additive comprises a compound shown in a structural formula 1:
wherein R is1、R2、R3、R4Each independently selected from an oxygen atom or a sulfur atom, R5、R6、R7、R8Each independently selected from a hydrogen atom or a C1-C5 hydrocarbyl group, R9、R10Each independently selected from a hydrogen atom, a halogen atom, a C1-C5 hydrocarbon group or a C1-C5 halogenated hydrocarbon group, R11Selected from magnesium or zinc. The non-aqueous electrolyte additive can improve the cycle performance and the high-temperature storage performance of the lithium ion battery under a high-voltage system.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to an electrolyte additive, a non-aqueous electrolyte and a lithium ion battery.
Background
Lithium ion batteries are widely used by people because of their advantages of high energy density, high charge-discharge efficiency, small self-discharge, long service life, environmental friendliness, etc. The method is applied to the fields of consumer electronics, aerospace, military, electric tools, electric automobiles and the like. With the development of technology, no matter in the consumer field or the power battery field, people have higher and higher requirements on the cruising ability of lithium ion batteries, and the development of high energy density (mass energy density and volume energy density) lithium batteries becomes a key point. The development of a high-energy density lithium battery can be started from two aspects, namely, the development of a new high-gram-capacity anode and cathode material; and secondly, the charging and discharging voltage of the lithium battery is improved. The charging and discharging voltage of the lithium battery is improved, the mass energy density and the volume energy density of the lithium battery can be improved, the cost of the lithium battery can be reduced, and the lithium battery becomes a hotspot of research of people.
However, in the study of high voltage lithium batteries, it was found that the deterioration of the battery performance was significant as the voltage of the lithium battery was increased. Such as high voltage (. gtoreq.4.5V) Lithium Cobaltate (LCO), which undergoes a deleterious phase transition from the hexagonal O3 phase to the hybrid O1-O3 phase when it is charged to voltages above 4.45V, a process that is accompanied by sliding between lattice layers and partial collapse of the O3 lattice structure. With the increase in internal stress of the LCO, further resulting in LCO crack formation and particle breakage. In addition, due to O2-2p top of resonance band and low spin Co3+/4+:t2gThe resonance bands overlap so that oxygen starts to undergo redox reactions at high voltage. Due to peroxide ion O1-Has an ion mobility higher than that of O2-O on the surface of LCO-Is easily converted into O2And detached from the LCO particles, which may damage the positive electrode-electrolyte interface, thereby leading toCausing interfacial instability. Therefore, the interface activity of the LCO material under high voltage and the decomposition of the electrolyte are slowed down, so that the cycle performance and the storage performance of the lithium ion battery under a high-voltage system can be improved.
Therefore, a non-aqueous electrolyte additive, a non-aqueous electrolyte and a lithium ion battery are needed to solve the problems of the prior art.
Disclosure of Invention
The invention aims to provide a non-aqueous electrolyte additive which can improve the cycle performance and the high-temperature storage performance of a lithium ion battery under a high-voltage system.
The invention also aims to provide a nonaqueous electrolyte which contains the nonaqueous electrolyte additive and can improve the cycle performance and the high-temperature storage performance of the lithium ion battery under a high-voltage system.
The invention also aims to provide a lithium ion battery, and the lithium ion battery containing the non-aqueous electrolyte has better cycle performance and high-temperature storage performance under a high-pressure system.
To achieve the above object, the present invention provides a nonaqueous electrolyte additive comprising a compound represented by formula 1:
wherein R is1、R2、R3、R4Each independently selected from an oxygen atom or a sulfur atom, R5、R6、R7、R8Each independently selected from a hydrogen atom or a C1-C5 hydrocarbyl group, R9、R10Each independently selected from a hydrogen atom, a halogen atom, a C1-C5 hydrocarbon group or a C1-C5 halogenated hydrocarbon group, R11Selected from magnesium or zinc.
Compared with the prior art, the invention provides the non-aqueous electrolyte additive with a special structure, and the additive has weak ionization capacity and exists in the form of ion pairs in the electrolyte. In the first charging and discharging process, when orotic acid groups in the additive participate in the formation of a nitrogen-containing CEI film, special metal (Mg and Zn) ions are brought to the surface of the positive electrode so as to participate in the formation of a coating layer containing the special metal (Mg and Zn) ions, and the coating layer is coated on the surface of the positive electrode so that the positive electrode material can resist higher temperature and higher voltage, so that the nonaqueous electrolyte additive can remarkably improve the cycle performance and high-temperature storage performance of the lithium ion battery under a high-voltage system; meanwhile, imino on the orotic acid group has the complexing effect with fluorine ions in the electrolyte, so that hydrofluoric acid can be obviously removed, and the cycle performance and the high-temperature storage performance of the lithium ion battery under a high-voltage system are further improved.
Preferably, R5、R6、R7、R8Each independently selected from a hydrogen atom, a C1-C5 linear alkyl group, or a C1-C5 branched alkyl group.
Preferably, R9、R10Each independently selected from a hydrogen atom, a halogen atom, a chain alkyl group of C1-C5, a chain alkenyl group of C2-C5, a chain alkynyl group of C2-C5 or a halogenated hydrocarbon group of C1-C5; specifically, the chain alkyl of C1-C5 refers to a straight chain alkyl or branched chain alkyl with the carbon atom number of 1-5, the chain alkenyl of C2-C5 refers to a straight chain alkenyl or branched chain alkenyl with the carbon atom number of 2-5, and the chain alkynyl of C2-C5 refers to a straight chain alkynyl or branched chain alkynyl with the carbon atom number of 2-5.
Preferably, the compound represented by the structural formula 1 of the present invention is selected from at least one of the compounds 1 to 6:
the synthesis methods of the compound 3, the compound 4, the compound 5 and the compound 6 are as follows:
in order to achieve the above object, the present invention further provides a nonaqueous electrolyte, which comprises a lithium salt, a nonaqueous organic solvent, and the above nonaqueous electrolyte additive.
Compared with the prior art, the nonaqueous electrolyte comprises the nonaqueous electrolyte additive, and is applied to a lithium ion battery. In the first charge and discharge process of the lithium ion battery, when orotic acid groups in the nonaqueous electrolyte additive participate in forming a nitrogen-containing CEI film, special metal (Mg and Zn) ions are brought to the surface of the positive electrode so as to participate in forming a coating layer containing the special metal (Mg and Zn) ions, and the coating layer is coated on the surface of the positive electrode so that the positive electrode material can resist higher temperature and higher voltage, so that the nonaqueous electrolyte additive can remarkably improve the cycle performance and high-temperature storage performance of the lithium ion battery under a high-voltage system; meanwhile, imino on the orotic acid group has the complexing effect with fluorine ions in the electrolyte, so that hydrofluoric acid can be obviously removed, and the cycle performance and the high-temperature storage performance of the lithium ion battery under a high-voltage system are further improved.
Preferably, the mass percentage of the nonaqueous electrolyte additive in the nonaqueous electrolyte is 0.1-1%; specifically, the content is 0.1%, 0.2%, 0.5%, 0.8%, 1%, but the content is not limited to the recited values, and other values not recited in the above range are also applicable.
Preferably, the lithium salt of the present invention is selected from lithium hexafluorophosphate (LiPF)6) Lithium difluorophosphate (LiPO)2F2) Lithium bis (oxalato) borate (LiBOB), lithium difluoro (oxalato) borate (LiODFB), lithium difluoro (oxalato) phosphate (LiPF)2(C2O4)2) Lithium tetrafluoroborate (LiBF)4) Lithium tetrafluoro oxalate phosphate (LiPF)4(C2O4) Lithium bistrifluoromethylsulfonyl imide (LiN (SO))2CF3)2) Lithium bis (fluorosulfonylimide) (Li [ N (SO) ]2F)2) And lithium tetrafluoro-malonate phosphate.
Preferably, the mass percentage of the lithium salt in the non-aqueous electrolyte is 10-20%; specifically, the content may be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, but is not limited to the recited values, and other values not recited in the above range are also applicable.
Preferably, the non-aqueous organic solvent of the present invention is selected from at least one of Ethylene Carbonate (EC), dimethyl carbonate (DMC), diethyl carbonate (DEC), Ethyl Methyl Carbonate (EMC), Propylene Carbonate (PC), butyl acetate (n-BA), gamma-butyrolactone (gamma-GBL), propyl propionate (n-PP), Ethyl Propionate (EP) and Ethyl Butyrate (EB). The non-aqueous organic solvent is preferably Ethylene Carbonate (EC), diethyl carbonate (DEC) and Ethyl Methyl Carbonate (EMC).
The nonaqueous organic solvent of the present invention is preferably contained in the nonaqueous electrolytic solution in an amount of 60 to 80% by mass, and more specifically, may be contained in an amount of 60%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 80% by mass, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the nonaqueous electrolyte solution further comprises an auxiliary agent, wherein the mass percentage of the auxiliary agent in the nonaqueous electrolyte solution is 0.1-10.5%; the auxiliary agent is selected from the group consisting of ethyl 2,2, 2-trifluorocarbonate, diethyl 2,2, 2-trifluorocarbonate, ethylpropyl 2,2, 2-trifluorocarbonate, Vinylene Carbonate (VC), fluoroethylene carbonate (FEC), diethyl pyrocarbonate (DEPC), 1, 3-Propanesultone (PS), vinyl sulfate (DTD), vinyl 1, 2-Difluorocarbonate (DFEC), tris (trimethylsilane) phosphate (TMSP), tris (trimethylsilane) phosphite (TMSPi), 4 '-bis-1, 3-dioxolane-2, 2' -dione (BDC), 3-divinyl disulfate (BDTD), triallyl phosphate (TAP), tripropargyl phosphate (TPP), Succinonitrile (SN), Adiponitrile (ADN), 1,3, 6-Hexanetricarbonitrile (HTCN) and 1, at least one of 2-bis (cyanoethoxy) ethane (DENE). The auxiliary agent can form a stable passive film on the surface of the anode, prevent the electrolyte from being oxidized and decomposed on the surface of the anode, inhibit the transition metal ions from being dissolved out of the anode, improve the stability of the structure and the interface of the anode material, and further obviously improve the high-temperature storage performance and the cycle performance of the lithium ion battery. Preferably, the auxiliary agent is selected from Vinylene Carbonate (VC), fluoroethylene carbonate (FEC), 1, 3-Propane Sultone (PS), vinyl sulfate (DTD), tris (trimethylsilane) phosphate (TMSP), tris (trimethylsilane) phosphite (TMSPi), 4 '-bi-1, 3-dioxolane-2, 2' -dione (BDC), 3-divinyl sulfate (BDTD) or 1, 2-difluoroethylene carbonate (DFEC), and the content is 0.1-2%, 0.2-6%, 0.2-2%, 0.1-1.5% or 0.1-1.5%, respectively. The lithium ion battery cathode surface SEI film component can be modified by adding the vinyl sulfate (DTD) serving as an auxiliary agent into the electrolyte, so that the relative content of sulfur atoms and oxygen atoms is improved, the sulfur atoms and the oxygen atoms contain lone-pair electrons, lithium ions can be attracted, shuttle of the lithium ions in the SEI film is accelerated, the interface impedance of the battery is reduced, and the charge and discharge performance of the lithium ion battery is effectively improved. The 1, 3-Propane Sultone (PS) as an auxiliary agent has good film-forming property, can form a large amount of CEI films containing sulfonic acid groups on an anode interface, inhibit the decomposition and gas production of FEC at high temperature, and improve the capacity loss of the first charge and discharge of the lithium ion battery, thereby being beneficial to improving the reversible capacity of the lithium ion battery and further improving the high-temperature performance and the long-term cycle performance of the lithium ion battery. The tris (trimethylsilane) phosphate (TMSP) and the tris (trimethylsilane) phosphite (TMSPi) can absorb moisture and free acid, and the cycle performance of the lithium ion battery is improved.
In order to achieve the above object, the present invention also provides a lithium ion battery comprising a positive electrode and a negative electrode, further comprising the above-mentioned nonaqueous electrolytic solution, and having a maximum charging voltage of 4.53V.
Compared with the prior art, the non-aqueous electrolyte of the lithium ion battery comprises a non-aqueous electrolyte additive which is a compound shown in a structural formula 1, and in the first charge and discharge process of the lithium ion battery, orotic acid groups in the structural formula 1 can bring special metal (Mg and Zn) ions into the surface of a positive electrode while participating in the formation of a nitrogen-containing CEI film, so that the positive electrode material can be subjected to higher temperature resistance and higher voltage resistance by being coated on the surface of the positive electrode, and the non-aqueous electrolyte additive can remarkably improve the cycle performance and the high-temperature storage performance of the lithium ion battery under a high-voltage system; meanwhile, imino on the orotic acid group has the complexing effect with fluorine ions in the electrolyte, so that hydrofluoric acid can be obviously removed, and the cycle performance and the high-temperature storage performance of the lithium ion battery under a high-voltage system are further improved.
Preferably, the active material of the positive electrode of the present invention is lithium cobaltate.
Preferably, the active material of the negative electrode of the present invention is natural graphite.
Detailed Description
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific examples. It should be noted that the following implementation of the method is a further explanation of the present invention, and should not be taken as a limitation of the present invention.
Example 1
In a nitrogen-filled glove box (O)2＜1ppm，H2O < 1ppm), ethylene carbonate, diethyl carbonate and ethyl methyl carbonate were uniformly mixed in a mass ratio of 1:1:2 to prepare 79.8g of a nonaqueous organic solvent, and 0.2g of compound 1 was added as an additive to prepare a mixed solution. Sealing, packaging, freezing at a freezing room (-4 deg.C) for 2 hr, taking out, and placing in a nitrogen-filled glove box (O)2＜1ppm，H2O is less than 1ppm), 20g of lithium hexafluorophosphate is slowly added into the mixed solution, and the electrolyte is prepared after uniform mixing.
The formulations of the electrolytes of examples 2 to 19 and comparative examples 1 to 6 are shown in Table 1, and the procedure for preparing the electrolyte is the same as that of example 1.
TABLE 1 electrolyte formulation
Wherein the structural formulas of the compound 7, the compound 8, the compound 9 and the compound 10 are shown as follows:
lithium cobaltate with the highest charging voltage of 4.53V is used as a positive electrode material, natural graphite is used as a negative electrode material, the electrolytes of examples 1-19 and comparative examples 1-6 are prepared into lithium ion batteries according to a conventional lithium battery preparation method, and normal-temperature cycle performance, high-temperature cycle performance and high-temperature storage performance tests are respectively carried out under the following test conditions, and the test results are shown in Table 2:
and (3) testing the normal-temperature cycle performance:
the lithium ion battery is placed in an environment with the temperature of 25 ℃, is charged to 4.53V at a constant current of 1C, is charged at a constant voltage until the current is reduced to 0.05C, is discharged to 3.0V at a constant current of 1C, is circulated, and is subjected to DCIR measurement every 50 circles. The discharge capacity of the first and last turn was recorded, as well as the DCIR every 50 turns. The capacity retention and DCIR increase for the high temperature cycle were calculated as follows.
Capacity retention rate ═ last cycle discharge capacity/first cycle discharge capacity × 100%
DCIR lift ═ DCIR of last 50 cycles/DCIR of first cycle × 100%
And (3) testing high-temperature cycle performance:
and (3) placing the lithium ion battery in an oven with a constant temperature of 45 ℃, charging the lithium ion battery to 4.53V at a constant current of 1C, then charging the lithium ion battery at a constant voltage until the current is reduced to 0.05C, then discharging the lithium ion battery to 3.0V at a constant current of 1C, circulating the steps, and measuring the DCIR every 50 circles. The discharge capacity of the first and last turn was recorded, as well as the DCIR every 50 turns. The capacity retention and DCIR increase for the high temperature cycle were calculated as follows.
Capacity retention rate ═ last cycle discharge capacity/first cycle discharge capacity × 100%
DCIR lift ═ DCIR of last 50 cycles/DCIR of first cycle × 100%
And (3) high-temperature storage test:
and (3) charging the formed lithium ion battery to 4.53V at a constant current and a constant voltage of 1C at normal temperature, measuring the initial discharge capacity and the initial battery thickness of the battery, storing the battery for 8 hours at 85 ℃, then discharging the battery to 3.0V at 1C, and measuring the capacity retention and recovery capacity of the battery and the thickness of the battery after storage. The calculation formula is as follows:
battery capacity retention (%) — retention capacity/initial capacity × 100%;
battery capacity recovery (%) — recovery capacity/initial capacity × 100%;
thickness expansion ratio (%) (battery thickness after storage-initial battery thickness)/initial battery thickness × 100%.
Table 2 performance test results of lithium ion batteries
As can be seen from table 2, the performance of the lithium ion batteries of examples 1 and 4 to 8 is better than that of comparative examples 3 to 5, which indicates that the compound 7, the compound 8 and the compound 9 similar to the structural formula 1 of the present application can improve the cycle performance and the high temperature storage performance of the lithium ion battery to some extent, but the compound 7, the compound 8 and the compound 9 are not metal salt compounds, so the thermal stability and the stability under high voltage are not good, and the compound 7, the compound 8 and the compound 9 are not good in improving the cycle performance and the high temperature storage performance of the lithium ion battery as compared with the compound shown in the structural formula 1 because the compound 7, the compound 8 and the compound 9 are not metal salt compounds.
The performance of the lithium ion batteries of the examples 1 and 4-8 is better than that of the comparative example 6, which shows that although the compound 10 (magnesium bis (trifluoromethylsulfonyl) imide) also contains magnesium ions, the ionization capability of the compound 10 in the electrolyte is too strong, so that most of the magnesium ions are dissociated in the electrolyte and do not participate in a film forming reaction with the bis (trifluoromethylsulfonyl) imide ions, and therefore, the magnesium ions do not modify a CEI (positive electrode interface) film, but cause the magnesium ions to participate in discharge, and influence the performance of the lithium ion batteries; the compound shown in the structural formula 1 has weaker ionization capacity, so the compound exists in an ion pair form in an electrolyte, in the first charging and discharging process of the lithium ion battery, orotic acid groups in the compound shown in the structural formula 1 can bring special metal (Mg and Zn) ions into the surface of the positive electrode while participating in forming a nitrogen-containing CEI film, so that the special metal (Mg and Zn) ions participate in forming a coating layer containing the special metal (Mg and Zn) ions, and the coating layer is coated on the surface of the positive electrode, so that the positive electrode material can resist higher temperature and higher voltage, and the nonaqueous electrolyte additive can remarkably improve the cycle performance and high-temperature storage performance of the lithium ion battery in a high-voltage system.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A nonaqueous electrolyte additive comprising a compound represented by the formula 1:
wherein R is1、R2、R3、R4Each independently selected from an oxygen atom or a sulfur atom, R5、R6、R7、R8Each independently selected from a hydrogen atom or a C1-C5 hydrocarbyl group, R9、R10Each independently selected from a hydrogen atom, a halogen atom, a C1-C5 hydrocarbon group or a C1-C5 halogenated hydrocarbon group, R11Selected from magnesium or zinc.
2. The nonaqueous electrolyte additive of claim 1, wherein the compound represented by the structural formula 1 is at least one selected from the group consisting of compounds 1 to 6:
3. a nonaqueous electrolyte solution comprising a lithium salt and a nonaqueous organic solvent, characterized by further comprising the nonaqueous electrolyte additive as defined in any one of claims 1 to 2.
4. The nonaqueous electrolyte solution of claim 3, wherein the nonaqueous electrolyte additive is contained in the nonaqueous electrolyte solution in an amount of 0.1 to 1% by mass.
5. The nonaqueous electrolytic solution of claim 3, wherein the lithium salt is at least one selected from the group consisting of lithium hexafluorophosphate, lithium difluorophosphate, lithium bis (oxalato) borate, lithium difluoro (oxalato) phosphate, lithium tetrafluoroborate, lithium tetrafluorooxalato phosphate, lithium bis (trifluoromethylsulfonyl) imide, lithium bis (fluorosulfonyl) imide and lithium tetrafluoromalonato phosphate.
6. The nonaqueous electrolyte solution of claim 3, wherein the lithium salt is present in the nonaqueous electrolyte solution in an amount of 10 to 20% by mass.
7. The nonaqueous electrolytic solution of claim 3, wherein the nonaqueous organic solvent is at least one selected from the group consisting of ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propylene carbonate, butyl acetate, γ -butyrolactone, propyl propionate, ethyl propionate, and ethyl butyrate.
8. The nonaqueous electrolytic solution of claim 3, further comprising an auxiliary, the auxiliary agent is selected from at least one of 2,2, 2-trifluoroethyl carbonate, ethyl propyl 2,2, 2-trifluorophosphate, vinylene carbonate, fluoroethylene carbonate, diethyl pyrocarbonate, 1, 3-propane sultone, vinyl sulfate, vinyl 1, 2-difluorocarbonate, tris (trimethylsilane) phosphate, tris (trimethylsilane) phosphite, 4 '-bi-1, 3-dioxolane-2, 2' -dione, 3-divinyl disulfonate, triallyl phosphate, succinonitrile, adiponitrile, 1,3, 6-hexanetrinitrile and 1, 2-bis (cyanoethoxy) ethane.
9. A lithium ion battery comprising a positive electrode and a negative electrode, further comprising the nonaqueous electrolytic solution according to any one of claims 3 to 8, and having a maximum charging voltage of 4.53V.
10. The lithium ion battery according to claim 9, wherein the active material of the positive electrode is lithium cobaltate.
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| CN114566710A (en) * | 2022-02-23 | 2022-05-31 | 珠海市赛纬电子材料股份有限公司 | Lithium ion battery non-aqueous electrolyte for quick charging and lithium ion battery |
| WO2022199163A1 (en) * | 2021-03-25 | 2022-09-29 | 珠海市赛纬电子材料股份有限公司 | Non-aqueous electrolyte additive, non-aqueous electrolyte and lithium ion battery |
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| INA BACH 等: "Orotate complexes. Synthesis and crystal structure of lithium orotate(—I) monohydrate and magnesium bis[ orotate(—I)] octahydrate", 《CHEMISCHE BERICHTE》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022199163A1 (en) * | 2021-03-25 | 2022-09-29 | 珠海市赛纬电子材料股份有限公司 | Non-aqueous electrolyte additive, non-aqueous electrolyte and lithium ion battery |
| CN114188607A (en) * | 2021-12-20 | 2022-03-15 | 珠海市赛纬电子材料股份有限公司 | Additive, electrolyte using additive and lithium ion battery |
| CN114188607B (en) * | 2021-12-20 | 2022-09-06 | 珠海市赛纬电子材料股份有限公司 | Additive, electrolyte using additive and lithium ion battery |
| CN114566710A (en) * | 2022-02-23 | 2022-05-31 | 珠海市赛纬电子材料股份有限公司 | Lithium ion battery non-aqueous electrolyte for quick charging and lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022199163A1 (en) | 2022-09-29 |
| CN113067034B (en) | 2022-05-27 |
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