CN111092255B - Lithium ion battery - Google Patents

Lithium ion battery Download PDF

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CN111092255B
CN111092255B CN201811239429.0A CN201811239429A CN111092255B CN 111092255 B CN111092255 B CN 111092255B CN 201811239429 A CN201811239429 A CN 201811239429A CN 111092255 B CN111092255 B CN 111092255B
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lithium
lithium ion
ion battery
battery
porosity
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CN111092255A (en
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米欣
刘星
艾关杰
周艾平
胡时光
石桥
林木崇
熊得军
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Sanming Hexafluo Chemicals Co Ltd
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Shenzhen Winboth Technology Co ltd
Shenzhen Capchem Technology Co Ltd
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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
    • 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
    • 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
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • 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
    • H01M2004/021—Physical characteristics, e.g. porosity, surface area
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

In order to solve the problems that the existing lithium ion battery has low porosity and affects the permeation of electrolyte and the existing high-energy battery scheme has poor high-temperature stability, the invention provides a lithium ion battery which comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains CF3CHFCF2OCH2CF3(ii) a In addition, the negative active material in the negative electrode is of a layered crystal structure, and the interlayer spacing is 0.32-0.36 nm; and the positive plate and the negative plate both have a porosity of 25% or less. The lithium ion battery provided by the invention has larger volume energy density, can ensure that lithium is not separated, and meanwhile, the battery has good high-temperature and normal-temperature cycle performance, thereby being beneficial to improving the energy density and stability of the battery.

Description

Lithium ion battery
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery.
Background
With the continuous improvement of the endurance mileage of new energy vehicles and the continuous development of the lightness and thinness of 3C digital products, the battery industry increasingly requires the high energy density of lithium ion batteries. Therefore, size reduction, weight reduction, and service life extension are urgent needs for the development of the battery industry.
The porosity of the positive and negative pole pieces of the battery is one of important means for improving the volume energy density of the lithium ion battery, but the lower the porosity of the pole pieces is, the higher the requirement on the electrolyte is. In the low-porosity pole piece battery system, electrolyte is difficult to permeate into the pole piece in a short time, so that the residual liquid amount of the electrolyte in the manufacturing process of the battery is insufficient, and the problems of serious insufficient cycle performance and lithium precipitation of the battery exist; meanwhile, because the electrolyte is difficult to permeate at the interface of the low-porosity pole piece, the contact internal resistance between the electrolyte and the electrode is increased, and the exertion of the battery capacity and the charge and discharge performance with high multiplying power are also influenced. At present, two methods for improving the performance of the low-porosity pole piece battery in the electrolyte are available, one method is to add low-viscosity solvents, such as ethyl acetate, and the like, and the solvents can reduce the viscosity of the electrolyte, promote the infiltration of the electrolyte, and improve the performances of the battery, such as circulation, multiplying power and the like; one is to add additives for promoting the circulation and reducing the impedance, such as FEC, etc., which can reduce the impedance of the battery, so that the battery is not easy to precipitate lithium, and the cycle life of the battery is improved. However, both of these methods reduce the high-temperature stability of the battery, resulting in poor high-temperature performance of the electrolyte, and are prone to ballooning. Therefore, the method ensures that the battery does not precipitate lithium, and also considers the high-temperature performance and the normal-temperature cycle of the battery, and is a big subject of the research on the low-porosity pole piece lithium ion battery electrolyte.
Disclosure of Invention
The invention provides a lithium ion battery, aiming at the problems that the existing lithium ion battery has low porosity and influences the permeation of electrolyte and the existing high-energy battery scheme has high-temperature stability.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a lithium ion battery non-aqueous electrolyte, which comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains CF3CHFCF2OCH2CF3(ii) a In addition, the negative active material in the negative electrode is of a layered crystal structure, and the interlayer spacing is 0.32-0.36 nm; and the positive plate and the negative plate both have a porosity of 25% or less.
In general, the porosity of a battery pole piece has a large impact on battery performance. Low porosity is advantageous for increasing the volumetric energy density of the battery, but low porosity is likely to result in a decrease in the overall performance of the battery, for example, a decrease in the cycle performance, an increase in internal resistance, and a decrease in the high-temperature storage performance of the battery. At present, the porosity of the pole piece is usually higher than 25% to ensure the performance of the battery. In the invention, in order to improve the overall performance of the battery, a negative active material with the interlayer spacing of 0.32-0.36 nm is adopted, on the basis, the positive pole piece and the negative pole piece adopt lower porosity (below 25%), and meanwhile, CF is added into the non-aqueous electrolyte3CHFCF2OCH2CF3The obtained lithium ion battery has larger volume energy density and good high-temperature and normal-temperature cycle performance.
Optionally, the porosity of each of the positive plate and the negative plate is less than 20%.
Optionally, the negative active material is artificial graphite with an interlayer spacing of 0.32-0.36 nm.
Optionally, the CF is calculated by taking the total mass of the nonaqueous electrolyte as 100 percent3CHFCF2OCH2CF3The mass percentage content of the components is 0.1-20.0%.
Optionally, the nonaqueous electrolyte solution contains a lithium salt, and the lithium salt includes one or more of lithium hexafluorophosphate, lithium perchlorate, lithium tetrafluoroborate, lithium bifluorodioxolate borate, lithium bis (trifluoromethylsulfonyl) imide and lithium bifluorosulfonylimide. Particularly preferably, lithium hexafluorophosphate is contained together with lithium bis (fluorooxalato) borate.
The nonaqueous electrolyte also comprises a film forming additive, and the content of the film forming additive is 0.1-15.0% by taking the total mass of the nonaqueous electrolyte as 100%.
Optionally, the film-forming additive further comprises one or more of vinylene carbonate, fluoroethylene carbonate, 1, 3-propane sultone, and a dinitrile compound.
Optionally, the dinitrile compound comprises one or more of succinonitrile, glutaronitrile, adiponitrile, pimelonitrile, suberonitrile, nonadinitrile and sebaconitrile.
Optionally, based on 100% of the total mass of the nonaqueous electrolyte, the content of the vinylene carbonate is 0.1% to 2.0%, the content of the fluoroethylene carbonate is 0.1% to 10.0%, the content of the 1, 3-propane sultone is 0.1% to 7.0%, and the content of the dinitrile compound is 0.1% to 10.0%.
Optionally, the charge cut-off voltage of the battery is greater than 4.2V and equal to or less than 4.5V.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a lithium ion battery, which comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte, wherein the non-aqueous electrolyte contains CF3CHFCF2OCH2CF3(ii) a In addition, the negative active material in the negative electrode is of a layered crystal structure, and the interlayer spacing is 0.32-0.36 nm; and the positive plate and the negative plate both have a porosity of 25% or less.
In some embodiments, the positive and negative electrode sheets each have a porosity of 20% or less.
In some embodiments, the negative active material is artificial graphite having an interlayer spacing of 0.32 to 0.36 nm.
And mixing the negative active material with a conductive agent, a binder and a solvent to obtain negative slurry, coating the negative slurry on a negative current collector, and drying to obtain the negative electrode.
In some embodiments, the positive electrode comprises a positive active material that is LiNixCoyMnzL(1-x-y-z)O2、LiCox’L(1-x’)O2、LiNix”L’y’Mn(2-x”-y’)O4、Liz’MPO4At leastOne kind of the material is selected; wherein L is at least one of Al, Sr, Mg, Ti, Ca, Zr, Zn, Si or Fe; x is more than or equal to 0 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 1, z is more than or equal to 0 and less than or equal to 1, x + y + z is more than 0 and less than or equal to 1, 0<x 'is not less than 1, x is not less than 0.3 and not more than 0.6, and y' is not less than 0.01 and not more than 0.2; l' is at least one of Co, Al, Sr, Mg, Ti, Ca, Zr, Zn, Si and Fe; z' is more than or equal to 0.5 and less than or equal to 1, and M is at least one of Fe, Mn and Co.
And mixing the positive active material with a conductive agent, a binder and a solvent to obtain positive slurry, coating the positive slurry on a positive current collector, and drying to obtain the positive electrode.
In some embodiments, the CF is present in an amount of 100% by weight of the total nonaqueous electrolyte3CHFCF2OCH2CF3Is 0.1 to 20.0 percent by mass, preferably, the CF3CHFCF2OCH2CF3The mass percentage content of the components is 0.1-10.0%.
When the CF is3CHFCF2OCH2CF3If the content of (b) is too low, the effects of improving the wetting speed and the stability of the battery are difficult to be achieved; when the CF is3CHFCF2OCH2CF3When the content of (b) is too high, the solubility of the lithium salt is lowered, and the lithium salt is precipitated.
Specifically, the CF3CHFCF2OCH2CF3Can be selected to be 0.2%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5% and 10% by mass.
In some embodiments, the nonaqueous electrolyte solution contains a lithium salt including one or more of lithium hexafluorophosphate, lithium perchlorate, lithium tetrafluoroborate, lithium difluorooxalato borate, lithium bis (trifluoromethylsulfonyl) imide, and lithium bis fluorosulfonyl imide. The content of the lithium salt in the nonaqueous electrolytic solution may be, for example, 1 to 1.5M, as is conventional.
Particularly preferably, the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide salt are contained, wherein the content of the lithium bis (fluorosulfonyl) imide salt is 0.1-10%.
The type and content of the solvent in the embodiment of the present invention are not particularly limited, and for example, the solvent of the nonaqueous electrolyte solution of the lithium ion battery includes cyclic carbonate and chain carbonate.
Preferably, the cyclic carbonate includes at least one of ethylene carbonate, propylene carbonate, and butylene carbonate. The chain carbonate comprises at least one of dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate and methyl propyl carbonate.
In some embodiments, the nonaqueous electrolyte further comprises a film-forming additive, and the content of the film-forming additive is 0.1-15.0% of the total mass of the nonaqueous electrolyte.
The film-forming additive further includes one or more of vinylene carbonate, fluoroethylene carbonate, 1, 3-propane sultone, and a dinitrile compound.
In some embodiments, the dinitrile compound comprises one or more of succinonitrile, glutaronitrile, adiponitrile, pimelonitrile, suberonitrile, nonadinitrile and sebaconitrile.
The content of the vinylene carbonate is 0.1-2.0%, the content of the fluoroethylene carbonate is 0.1-10.0%, the content of the 1, 3-propane sultone is 0.1-7.0%, and the content of the dinitrile compound is 0.1-10.0%, based on 100% of the total mass of the nonaqueous electrolyte.
The charge cutoff voltage of the battery is greater than 4.2V and not greater than 4.5V.
The present invention will be further illustrated by the following examples.
Example 1
This embodiment is used to illustrate a lithium ion battery and a method for manufacturing the same disclosed in the present invention, and includes the following operation steps:
preparation of nonaqueous electrolyte: ethylene Carbonate (EC), diethyl carbonate (DEC) and Ethyl Methyl Carbonate (EMC) were mixed in a mass ratio of EC: DEC: EMC ═ 1:1:1, and then lithium hexafluorophosphate (LiPF) was added6) To a molar concentration of 1mol/L, and based on 100% of the total weight of the nonaqueous electrolytic solution, components containing the mass percentage shown in Table 1 were added.
Preparing a positive plate: mixing a positive active material LiCoO in a mass ratio of 93:4:32Conductive carbon black Super-P and a binder polyvinylidene fluoride (PVDF), and then the mixture was dispersed in N-methyl-2-pyrrolidone (NMP) to obtain a positive electrode slurry. And (3) uniformly coating the slurry on two sides of the aluminum foil, drying, rolling and vacuum drying, welding an aluminum outgoing line by using an ultrasonic welding machine to obtain the positive plate, wherein the thickness of the positive plate is between 120 and 150 mu m, and detecting the porosity of the positive plate and recording the porosity in table 1.
Preparing a negative plate: mixing artificial graphite serving as a negative electrode active material, conductive carbon black Super-P, Styrene Butadiene Rubber (SBR) serving as a binder and carboxymethyl cellulose (CMC) according to a mass ratio of 94:1:2.5:2.5, and dispersing the materials in deionized water to obtain negative electrode slurry. Coating the slurry on two sides of a copper foil, drying, rolling and vacuum drying, welding a nickel outgoing line by using an ultrasonic welding machine to obtain a negative plate, wherein the thickness of the negative plate is between 120 and 150 mu m, and detecting the porosity of the negative plate and recording the porosity in table 1.
Preparing an electric core: and placing three layers of diaphragms with the thickness of 20 mu m between the positive plate and the negative plate, then winding the sandwich structure consisting of the positive plate, the negative plate and the diaphragms, flattening the wound body, then placing the flattened wound body into an aluminum foil packaging bag, and baking the flattened wound body in vacuum at 85 ℃ for 24 hours to obtain the battery cell to be injected with liquid.
Liquid injection and formation of the battery cell: and (3) in a glove box with the dew point controlled below-40 ℃, injecting the prepared electrolyte into the battery cell, carrying out vacuum packaging, and standing for 24 hours.
Then the first charge is normalized according to the following steps: charging at 0.05C for 180min, charging at 0.2C to 3.95V, vacuum sealing for the second time, further charging at 0.2C to 4.4V, standing at room temperature for 24hr, and discharging at 0.2C to 3.0V to obtain 4.4V LiCoO2An artificial graphite lithium ion battery.
Examples 2 to 9
Examples 2 to 9 are provided to illustrate a lithium ion battery and a method for manufacturing the same disclosed in the present invention, and include most of the operation steps in example 1, except that:
the porosity of the positive electrode sheet and the negative electrode sheet is shown in table 1 as example 2 to example 9.
The preparation step of the nonaqueous electrolyte comprises the following steps:
the nonaqueous electrolytic solution is added with the components with the mass percentage shown in the examples 2 to 9 in the table 1 based on the total mass of the nonaqueous electrolytic solution as 100%.
Comparative examples 1 to 6
Comparative examples 1 to 6 are provided for comparative purposes to illustrate the lithium ion battery and the preparation method thereof disclosed in the present invention, and include most of the operation steps in example 1, except that:
the porosity of the positive electrode sheet and the negative electrode sheet is shown in comparative examples 1 to 6 in table 1.
The non-aqueous electrolyte preparation step comprises:
the nonaqueous electrolytic solution is added with the components with the mass percentage content shown in comparative examples 1 to 6 in Table 1, wherein the total weight of the nonaqueous electrolytic solution is 100%.
Performance testing
The lithium ion batteries prepared in the above examples 1 to 9 and comparative examples 1 to 6 were subjected to the following performance tests:
1) and (3) testing the normal-temperature cycle performance:
at 25 ℃, the formed battery is charged to 4.4V by a 1C constant current and constant voltage, the current is cut off to be 0.01C, and then the battery is discharged to 3.0V by a 1C constant current. After N cycles of charge/discharge, the capacity retention rate after the Nth cycle was calculated to evaluate the normal temperature cycle performance.
The calculation formula of the capacity retention rate at 25 ℃ for 1C circulation N times is as follows:
the nth cycle capacity retention (%) was (nth cycle discharge capacity/first cycle discharge capacity) × 100%.
2)60 ℃ high-temperature storage performance test:
the formed battery is charged to 4.4V at constant current and constant voltage of 1C at normal temperature, the cut-off current is 0.01C, then the 1C constant current is used for discharging to 3.0V, the initial discharge capacity of the battery is measured, then the 1C constant current and constant voltage are used for charging to 4.4V, the cut-off current is 0.01C, the initial thickness of the battery is measured, then the battery is stored for N days at 60 ℃, the thickness of the battery is measured, then the 1C constant current is used for discharging to 3.0V, the retention capacity of the battery is measured, then the 1C constant current and constant voltage are used for charging to 4.4V, the cut-off current is 0.01C, then the 1C constant current is used for discharging to 3.0V, and the recovery capacity is measured. The calculation formulas of the capacity retention rate and the capacity recovery rate are as follows:
battery capacity retention (%) — retention capacity/initial capacity × 100%;
battery capacity recovery (%) — recovery capacity/initial capacity × 100%;
the battery thickness swelling ratio (%) (thickness after N days-initial thickness)/initial thickness × 100%.
The test results obtained are filled in table 2.
TABLE 1
Figure BDA0001838898290000061
Figure BDA0001838898290000071
The material designations in Table 1 are illustrated below:
d2: 1,1,2, 2-tetrafluoroethyl-2, 2,3, 3-tetrafluoropropyl ether
FEC: fluoroethylene carbonate
SN: succinonitrile and its use
PS: 1, 3-propane sultone
LiFSI: bis (fluorosulfonyl) imide lithium salt
TABLE 2
Figure BDA0001838898290000072
The test results of the comparative examples 1-9 and the comparative examples 1-6 show that the lithium ion battery scheme provided by the invention has better normal-temperature cycle performance and high-temperature storage performance.
The test results of comparative examples 1 to 4 were as followsIt is known that the improvement of the normal temperature cycle performance and the high temperature storage performance of the battery and CF in the electrolyte3CHFCF2OCH2CF3The content of (A) is in positive correlation.
Comparing the test results of examples 6 and 7, examples 8 and 9, comparative examples 3 and 4, and comparative examples 5 and 6, it can be seen that when the porosity of the positive or negative electrode sheet is decreased, the normal temperature cycle performance and the high temperature storage performance of the battery are decreased to various degrees, but with respect to the case where CF is not added3CHFCF2OCH2CF3Of a battery to which CF is added3CHFCF2OCH2CF3The normal temperature and high temperature performance of the battery is obviously reduced by a smaller range, which shows that the electrolyte provided by the invention can reduce the influence of porosity reduction on the performance of the battery, and is beneficial to preparing the battery with high energy density and stable performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. A lithium ion battery comprises a positive plate, a negative plate, a diaphragm and a non-aqueous electrolyte, and is characterized in that: the nonaqueous electrolyte contains CF3CHFCF2OCH2CF3And a film-forming additive comprising fluoroethylene carbonate, 1, 3-propane sultone, and a dinitrile compound; in addition, the negative active material in the negative electrode is of a layered crystal structure, and the interlayer spacing is 0.32-0.36 nm; the porosity of the positive plate and the porosity of the negative plate are both below 25%;
the CF is calculated by taking the total mass of the nonaqueous electrolyte as 100 percent3CHFCF2OCH2CF3The composition comprises, by mass, 0.1% -20.0% of the film-forming additive, 0.1% -15.0% of the fluoroethylene carbonate, 0.1% -10.0% of the fluoroethylene carbonate, 0.1% -7.0% of the 1, 3-propane sultone and 0.1% -10.0% of the dinitrile compound.
2. The lithium ion battery according to claim 1, wherein the positive electrode sheet and the negative electrode sheet each have a porosity of 20% or less.
3. The lithium ion battery according to claim 1, wherein the negative active material is artificial graphite having an interlayer spacing of 0.32 to 0.36 nm.
4. The lithium ion battery according to claim 1, wherein the nonaqueous electrolytic solution contains a lithium salt, and the lithium salt comprises one or more of lithium hexafluorophosphate, lithium perchlorate, lithium tetrafluoroborate, lithium bifluorodioxolate borate, lithium bis (trifluoromethylsulfonyl) imide and lithium bifluorosulfonylimide.
5. The lithium ion battery of claim 1, wherein the film forming additive further comprises vinylene carbonate.
6. The lithium ion battery of claim 1, wherein the dinitrile compound comprises one or more of succinonitrile, glutaronitrile, adiponitrile, pimelonitrile, suberonitrile, nonadinitrile and sebaconitrile.
7. The lithium ion battery according to claim 5, wherein the vinylene carbonate is contained in an amount of 0.1 to 2.0% based on 100% by mass of the total mass of the nonaqueous electrolytic solution.
8. The lithium ion battery of claim 1, wherein the charge cut-off voltage of the battery is greater than 4.2V and equal to or less than 4.5V.
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CN111987286B (en) * 2020-09-14 2021-10-26 珠海冠宇电池股份有限公司 Negative plate and lithium ion battery comprising same
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CN113659206B (en) * 2021-08-13 2023-05-09 深圳新宙邦科技股份有限公司 High-compaction lithium ion battery

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102683748A (en) * 2004-04-20 2012-09-19 三菱化学株式会社 Nonaqueous electrolyte solution and lithium secondary battery using same
CN102823029A (en) * 2010-02-03 2012-12-12 日本瑞翁株式会社 Lithium ion secondary battery negative electrode slurry composition, a lithium ion secondary battery negative electrode, and lithium ion secondary battery
CN103633371A (en) * 2013-12-13 2014-03-12 深圳新宙邦科技股份有限公司 Non-aqueous electrolyte for lithium ion battery and lithium ion battery
CN105580188A (en) * 2013-09-24 2016-05-11 旭硝子株式会社 Monaqueous liquid electrolyte for use in secondary battery, and lithium-ion secondary battery
CN107851846A (en) * 2015-08-31 2018-03-27 积水化学工业株式会社 Electrolyte and lithium rechargeable battery

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101916857B (en) * 2010-08-19 2013-05-15 深圳市贝特瑞新能源材料股份有限公司 Composite cathode material for lithium ion power and energy storage battery and preparation method thereof and battery
HUE046573T2 (en) * 2013-04-04 2020-03-30 Solvay Nonaqueous electrolyte compositions
CN103325991B (en) * 2013-05-31 2017-11-07 余玉英 A kind of full temperature range lithium ion battery

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102683748A (en) * 2004-04-20 2012-09-19 三菱化学株式会社 Nonaqueous electrolyte solution and lithium secondary battery using same
CN102823029A (en) * 2010-02-03 2012-12-12 日本瑞翁株式会社 Lithium ion secondary battery negative electrode slurry composition, a lithium ion secondary battery negative electrode, and lithium ion secondary battery
CN105580188A (en) * 2013-09-24 2016-05-11 旭硝子株式会社 Monaqueous liquid electrolyte for use in secondary battery, and lithium-ion secondary battery
CN103633371A (en) * 2013-12-13 2014-03-12 深圳新宙邦科技股份有限公司 Non-aqueous electrolyte for lithium ion battery and lithium ion battery
CN107851846A (en) * 2015-08-31 2018-03-27 积水化学工业株式会社 Electrolyte and lithium rechargeable battery

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