CN113066975B - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
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- CN113066975B CN113066975B CN202110320304.6A CN202110320304A CN113066975B CN 113066975 B CN113066975 B CN 113066975B CN 202110320304 A CN202110320304 A CN 202110320304A CN 113066975 B CN113066975 B CN 113066975B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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 lithium ion battery, which comprises an anode, a cathode and electrolyte, wherein the electrolyte comprises lithium salt, a non-aqueous organic solvent and an additive, an active material of the anode comprises lithium cobaltate, and the additive comprises a compound shown in a structural formula 1:
wherein R is1、R2Each independently selected from hydrogen, alkali metals or hydrocarbon groups having 1 to 4 carbon atoms. The lithium ion battery has better cycle performance and high-temperature storage performance under a high-voltage system.
Description
Technical Field
The invention belongs to the technical field of energy storage, and particularly relates to a lithium ion battery.
Background
The lithium ion battery has the advantages of high specific energy, no memory effect, long cycle life and the like, and is widely applied to the fields of 3C digital, electric tools, aerospace, energy storage, power automobiles and the like, and the rapid development of electronic information technology and consumer products puts higher requirements on the high voltage and the high energy density of the lithium ion battery. At present, manufacturers of digital electronic product batteries at home and abroad are developing towards a high-voltage lithium ion battery, and the high-voltage lithium ion battery has larger market space on portable electronic equipment. High-voltage Lithium Cobaltate (LCO) is the mainstream of the anode material of the current 3C lithium battery, and the market demand is steadily increased, so that the output of the LCO is steadily increased year by year. The industrialization of high voltage (not less than 4.5V) LCO, and the LCO is promoted to a brand new development platform. From a gram capacity of a conventional LCO 140mAh/G (4.2V) to a gram capacity of 220mAh/G (4.6V), the gram capacity density of the LCO can be increased by 21%, and the battery has longer cruising ability and can better support the upgrade of communication technology from 4G to 5G or even 6G.
Currently, modified 4.35V, 4.4V, and 4.45V LCO cells and matching electrolytes have been commercialized, however, 4.5V and above high voltage LCO cell technologies still have some challenges. The concrete points are as follows: li1-xCoO2The theoretical specific capacity can reach 274 mAh/g. Generally when x > 0.6 or more, the theoretical cutoff voltage of LCO is greater than 4.45V, but when LCO is charged to a voltage above 4.45V, it undergoes a detrimental phase transition from the O3 hexagonal phase to the hybrid O1-O3 phase, a process accompanied by sliding between lattice layers and partial collapse of the O3 lattice structure, accompanied by an increase in the internal stress of the LCO, further leading to 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 reaction at high voltage, due to the peroxo ion O1-Has an ion mobility higher than that of O2-O on the surface of LCO-Is easily converted into O2And escape the LCO particles, which can disrupt the positive electrode-electrolyte interface, resulting in interfacial instability. Therefore, to obtain stable cycling performance, the LCO's cutoff voltage is typically below 4.45V with a finite capacity of 175 mAh/g. 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, it is necessary to develop a lithium ion battery to solve the deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a lithium ion battery which has better cycle performance and high-temperature storage performance under a high-voltage system.
In order to achieve the above object, the present invention provides a lithium ion battery comprising a positive electrode, a negative electrode and an electrolyte, wherein the electrolyte comprises a lithium salt, a non-aqueous organic solvent and an additive, an active material of the positive electrode comprises lithium cobaltate, and the additive comprises a compound represented by a structural formula 1:
wherein R is1、R2Each independently selected from hydrogen, alkali metals or hydrocarbon groups having 1 to 4 carbon atoms.
Compared with the prior art, the active material of the anode of the lithium ion battery comprises lithium cobaltate, the electrolyte comprises an additive, the additive comprises a compound shown in a structural formula 1, the compound shown in the structural formula 1 can form a nitrogen-containing passive film on the surfaces of the anode and the cathode of the lithium ion battery, wherein the nitrogen-containing passive film formed on the surface of the cathode can protect the cathode material and reduce the reductive decomposition of the electrolyte, so that the cycle performance of the lithium ion battery is improved, the nitrogen-containing passive film formed on the surface of the anode can protect the anode material, so that the O3 is prevented from being converted towards the O1 phase when the lithium cobaltate material is charged to a higher voltage, the oxygen evolution of the anode is further inhibited, the oxidative decomposition of the electrolyte is reduced, so that the cycle and high-temperature storage performance of the lithium ion battery is improved, and the compound shown in the structural formula 1 can also capture hydrofluoric acid so as to inhibit the decomposition of the electrolyte, therefore, the cycle and high-temperature storage performance of the lithium ion battery can be improved. More importantly, compared with other additives containing a bisketimine structure, the compound shown in the structural formula 1 is stable due to the symmetrical structure of the compound, so that the oxidation potential of the compound shown in the structural formula 1 is higher after film formation, the film is formed at a higher voltage, and the formed nitrogen-containing organic electrolyte film is not easy to decompose at a high voltage, so that the cycle performance and the high-temperature storage performance of the lithium ion battery can be further improved.
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 2, the compound 3, the compound 4, the compound 5 and the compound 6 are as follows:
preferably, the mass of the additive accounts for 0.1-0.8% of the mass of the electrolyte. Specifically, the content is 0.1%, 0.2%, 0.5%, 0.8%, 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.
The amount of the lithium salt of the present invention is preferably 10 to 20% by mass, and more specifically 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20% by mass, based on the mass of the electrolyte, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned 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 mass of the non-aqueous organic solvent of the present invention is preferably 60 to 80% of the electrolyte, and specifically 60%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 80%, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the electrolyte also comprises an auxiliary agent, wherein the mass of the auxiliary agent accounts for 0.1-10.5% of the mass of the electrolyte; 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), and 1, 2-difluoroethylene carbonate (DFEC), and the contents are respectively 0.1-2%, 0.2-6%, 0.2-2%, 0.1-1.5%, and 0.1-1.5%. 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, so that the cycle performance of the lithium ion battery is improved.
Preferably, the active material of the negative electrode of the present invention includes natural graphite.
Preferably, the maximum charging voltage of the lithium ion battery of the present invention is 4.53V.
Preferably, the positive electrode of the present invention is composed of pure lithium cobaltate or doped lithium cobaltate.
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 to further explain the invention, and should not be construed as a limitation of the 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 formulation of the electrolyte
Wherein, the compounds 7, 8, 9 and 10 are shown as follows:
lithium cobaltate with the highest charging voltage of 4.53V is used as a positive electrode, natural graphite is used as a negative electrode, the electrolytes of examples 1 to 19 and comparative examples 1 to 6 are prepared into lithium ion batteries by referring 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:
using nickel cobalt lithium manganate ternary material Li [ Ni0.9Mn0.05Co0.05]O2The electrolyte of example 1 was prepared into a high-nickel ternary lithium ion battery by referring to a conventional lithium battery preparation method, and was subjected to normal-temperature cycle performance, high-temperature cycle performance, and high-temperature storage performance tests under the following test conditions, with test results shown in table 3:
and (3) testing the normal-temperature cycle performance:
the cell was placed in an environment of 25 ℃, and was charged to 4.53V at a constant current of 1C, then was charged at a constant voltage until the current dropped to 0.05C, and then was discharged to 3.0V at a constant current of 1C, so cycling, and then the DCIR was measured every 50 cycles. The discharge capacity of the first and last turns 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%
High-temperature cycle performance test:
the cell was placed in an oven at constant temperature 45 ℃, constant current charged to 4.53V at 1C, then constant voltage charged to 0.05C, then constant current discharged to 3.0V at 1C, cycled through this cycle, and then DCIR was measured every 50 cycles. 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 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
TABLE 3 Performance test results for high-Ni ternary Li-ion batteries
Comparing examples 1, 4-8 with comparative examples 3, 5, the performance of the lithium ion batteries of examples 1 and 4-8 is better than that of comparative examples 3 and 5, this is because compounds 1 to 6 are symmetrical structures and have two symmetrical imino functional groups, when one imino group has a film-forming reaction, the electrons shift, and the other imino group needs to have a film-forming reaction at a higher potential, therefore, due to the special symmetrical structures of the compounds 1 to 6, the film formation is carried out in two steps when the compounds participate in the film formation, and the formed nitrogen-containing SEI or CEI film has the function of layering protection, while comparative examples 3 and 5, having only one imine group, can form only a single nitrogen-containing SEI or CEI film, thus, compounds 1 to 6 formed nitrogen-containing SEI or CEI films more stable than the single nitrogen-containing SEI or CEI films formed in comparative example 3 and comparative example 5.
Comparing example 1, examples 4 to 8 and comparative example 4, the performance of the lithium ion batteries of examples 1 and 4 to 8 is better than that of comparative example 4, because the compound 8 also contains a diketoimine structure, but because the compound 8 is not a symmetrical structure, two imine functional groups cannot be formed in two steps when participating in film formation, and the formed nitrogen-containing SEI or CEI film does not have the function of layer protection, the film formation stability of the compound 8 under high voltage is poor, and the performance of the lithium ion batteries of comparative example 4 is not as good as that of examples 1 and 4 to 8.
Comparing example 1, examples 4 to 8 and comparative example 6, the performance of the lithium ion batteries of examples 1 and 4 to 8 is better than that of comparative example 6, because although compound 10 also contains a diketoimine structure, the structure of compound 10 is not stable as there is no carbonyl group on the left and right of one imino functional group, and further the imino functional groups on the left and right of compound 10 without carbonyl groups are reacted at a very low potential, resulting in the instability of the formed SEI/CEI film structure.
Comparing the performance test result of the lithium ion battery of example 1 in table 2 with the performance test result of the high-nickel ternary lithium ion battery in table 3, it is found that the compound 1 can achieve a better matching effect with the lithium cobaltate positive electrode material when used as an additive, which also indicates that the nitrogen-containing protective film formed by the compound 1 has less ideal effect of inhibiting the phase transition of H2-H3 in the high-nickel ternary positive electrode material under high voltage, because the phase transition of H2-H3 mainly originates from the mixed arrangement of Ni atoms of the high-nickel material in a high lithium ion state, and the compound a shown in the structural formula 1 has less effect of inhibiting the mixed arrangement of Ni atoms, so the compound a shown in the structural formula 1 is more suitable for a high-voltage lithium cobaltate system when used as an additive.
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 lithium ion battery comprising a positive electrode, a negative electrode and an electrolyte, the electrolyte comprising a lithium salt, a non-aqueous organic solvent and an additive, wherein an active material of the positive electrode comprises lithium cobaltate, and the additive comprises a compound represented by structural formula 1:
wherein R is1、R2Each independently selected from hydrogen, alkali metals or hydrocarbon groups having 1 to 4 carbon atoms.
2. The lithium ion battery according to claim 1, wherein the compound represented by the structural formula 1 is at least one selected from the group consisting of a compound 1 to a compound 6:
3. the lithium ion battery according to claim 1, wherein the additive accounts for 0.1-0.8% of the electrolyte by mass.
4. The lithium ion battery of claim 1, wherein the lithium salt is selected from at least one 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.
5. The lithium ion battery according to claim 1, wherein the mass of the lithium salt is 10 to 20% of the mass of the electrolyte.
6. The lithium ion battery of claim 1, wherein the non-aqueous organic solvent is selected from at least one of ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propylene carbonate, butyl acetate, γ -butyrolactone, propyl propionate, ethyl propionate, and ethyl butyrate.
7. The lithium ion battery according to claim 1, wherein the mass of the non-aqueous organic solvent accounts for 60 to 80% of the mass of the electrolyte.
8. The lithium ion battery of claim 1, wherein the electrolyte further comprises a promoter selected from the group consisting of ethyl 2,2, 2-trifluorocarbonate, diethyl 2,2, 2-trifluorocarbonate, ethyl propyl 2,2, 2-trifluorocarbonate, vinylene carbonate, fluoroethylene carbonate, diethyl pyrocarbonate, 1, 3-propanesultone, vinyl sulfate, vinyl 1, 2-difluorocarbonate, tris (trimethylsilane) phosphate, tris (trimethylsilane) phosphite, 4 '-bis-1, 3-dioxolane-2, 2' -dione, vinyl 3, 3-bisdisulfate, triallyl phosphate, succinonitrile, adiponitrile, 1,3, 6-hexanetrinitrile and 1, at least one of 2-bis (cyanoethoxy) ethane.
9. The lithium-ion battery of claim 1, wherein the active material of the negative electrode comprises natural graphite.
10. The lithium ion battery of claim 1, wherein the maximum charging voltage is 4.53V.
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| CN104995784A (en) * | 2013-02-27 | 2015-10-21 | 三菱化学株式会社 | Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same |
| CN106450432A (en) * | 2016-11-04 | 2017-02-22 | 东莞市凯欣电池材料有限公司 | High-voltage lithium-ion battery with Si/C composite anode |
| CN111755746A (en) * | 2019-03-26 | 2020-10-09 | 比亚迪股份有限公司 | Lithium ion battery electrolyte and lithium ion battery |
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| JP2012256502A (en) * | 2011-06-08 | 2012-12-27 | Sony Corp | Nonaqueous electrolyte and nonaqueous electrolyte battery, and battery pack, electronic apparatus, electric vehicle, electricity storage device and electric power system including nonaqueous electrolyte battery |
| KR102161266B1 (en) * | 2013-08-30 | 2020-09-29 | 삼성전자주식회사 | Electrolyte solution for seconndary lithium battery and secondary lithium battery using the same |
| CN111326728B (en) * | 2018-12-14 | 2021-09-21 | 宁德时代新能源科技股份有限公司 | Lithium ion battery |
| CN113066975B (en) * | 2021-03-25 | 2022-06-17 | 珠海市赛纬电子材料股份有限公司 | Lithium ion battery |
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| CN104995784A (en) * | 2013-02-27 | 2015-10-21 | 三菱化学株式会社 | Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same |
| CN106450432A (en) * | 2016-11-04 | 2017-02-22 | 东莞市凯欣电池材料有限公司 | High-voltage lithium-ion battery with Si/C composite anode |
| CN111755746A (en) * | 2019-03-26 | 2020-10-09 | 比亚迪股份有限公司 | Lithium ion battery electrolyte and lithium ion battery |
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