WO2018135889A1 - Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant - Google Patents

Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant Download PDF

Info

Publication number
WO2018135889A1
WO2018135889A1 PCT/KR2018/000873 KR2018000873W WO2018135889A1 WO 2018135889 A1 WO2018135889 A1 WO 2018135889A1 KR 2018000873 W KR2018000873 W KR 2018000873W WO 2018135889 A1 WO2018135889 A1 WO 2018135889A1
Authority
WO
WIPO (PCT)
Prior art keywords
lithium secondary
secondary battery
lithium
aqueous electrolyte
additive
Prior art date
Application number
PCT/KR2018/000873
Other languages
English (en)
Korean (ko)
Inventor
김하은
임영민
김광연
이철행
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020180006125A external-priority patent/KR102053313B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to US16/085,333 priority Critical patent/US10700381B2/en
Priority to PL18741574T priority patent/PL3416228T3/pl
Priority to EP18741574.0A priority patent/EP3416228B1/fr
Priority to CN201880001466.XA priority patent/CN109075387B/zh
Publication of WO2018135889A1 publication Critical patent/WO2018135889A1/fr

Links

Classifications

    • 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
    • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
    • 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
    • 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
    • H01M10/0569—Liquid materials characterised by the solvents
    • 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
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to a nonaqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery comprising the same.
  • lithium secondary batteries developed in the early 1990s have been spotlighted for their advantages of high operating voltage and high energy density.
  • the lithium secondary battery is composed of a carbon material negative electrode capable of occluding and releasing lithium ions, a positive electrode made of a lithium-containing composite oxide, and a nonaqueous electrolyte in which lithium salt is dissolved in a mixed organic solvent.
  • the lithium secondary battery generates a compound such as Li 2 CO 3 , Li 2 O, LiOH by reacting lithium ions and the electrolyte in the region of 0.5V to 3.5V during the initial charging, by a kind of passivation film (A solid electrolyte interface (SEI) film, which is a passivation layer, is formed.
  • SEI solid electrolyte interface
  • the SEI film formed at the beginning of charging prevents the reaction between lithium ions and carbon anode or lithium ions and other materials during charging and discharging. In addition, it functions as an ion tunnel to pass only lithium ions.
  • the ion tunnel plays a role in preventing the large molecular weight non-aqueous organic solvents that solvate lithium ions and move together to prevent the structure of the carbon anode from collapsing together. Characteristics and output characteristics can be improved.
  • the organic solvent used in the non-aqueous electrolyte of the lithium secondary battery generally causes a side reaction with the transition metal oxide of the cathode active material released when stored for a long time at high temperature to generate a gas.
  • the negative electrode when stored at high temperature in a full charge state (for example, when stored at 60 ° C. after 100% charge at 4.2 V), the negative electrode is exposed while the SEI film gradually collapses, and the exposed negative electrode continuously reacts with the electrolyte, Gases such as CO 2 , CH 4 , and C 2 H 6 are generated.
  • a first technical problem of the present invention is to provide a non-aqueous electrolyte solution for a lithium secondary battery including an additive which forms a stable film on an electrode surface and suppresses an electrolyte side reaction during high temperature storage.
  • the second technical problem of the present invention is to provide a lithium secondary battery having improved high temperature storage characteristics and cycle life characteristics by including the nonaqueous electrolyte solution for lithium secondary batteries.
  • Ionizable lithium salts Organic solvents
  • electrolyte solution for a lithium secondary battery comprising an additive
  • the additive is tetravinylsilane (tert-vinylsilane (TVS): lithium difluorophosphate (LiDFP): 1,3-propylene sulfate (1,3-propylene sulfate (PPS) 1: 1 to 20: 3 It is a mixed additive containing in a weight ratio of 20 to 20,
  • the additive provides a nonaqueous electrolyte solution for a lithium secondary battery, which is included in an amount of 1 wt% to 4 wt% based on the total weight of the nonaqueous electrolyte solution for a lithium secondary battery.
  • the weight ratio of the tetravinylsilane: lithium difluorophosphate: 1,3-propylene sulfate as the additive may be 1: 3 to 17: 5 to 20, more specifically 1: 5 to 15: 5 to 20.
  • the additive may be included in an amount of 1.8 wt% to 4 wt% based on the total weight of the nonaqueous electrolyte solution for the lithium secondary battery.
  • non-aqueous electrolyte of the present invention may further include at least one additional additive selected from the group consisting of vinylene carbonate (VC), LiBF 4 , 1,3-propane sultone, and tetraphenyl borate.
  • VC vinylene carbonate
  • LiBF 4 LiBF 4
  • 1,3-propane sultone 1,3-propane sultone
  • tetraphenyl borate tetraphenyl borate
  • the additional additive may be included in an amount of 0.1 wt% to 5 wt% based on the total weight of the nonaqueous electrolyte solution for the lithium secondary battery.
  • the weight ratio of the tetravinylsilane: 1,3-propane sultone (PS) may be included in a weight ratio of 1: 5 to 15.
  • the tetravinylsilane: VC or LiBF 4 may be included in a weight ratio of 1: 1 to 3.
  • a lithium secondary battery having a negative electrode, a positive electrode, a separator interposed between the negative electrode and the positive electrode and a non-aqueous electrolyte
  • the nonaqueous electrolyte solution includes a nonaqueous electrolyte solution for a lithium secondary battery of the present invention
  • the cathode provides a lithium secondary battery including lithium-nickel-manganese-cobalt oxide as a cathode active material.
  • the cathode active material may include a lithium transition metal oxide represented by Formula 1 below.
  • Representative examples of the positive electrode active material include Li (Ni 0.6 Mn 0.2 Co 0.2 ) O 2 , And at least one of Li (Ni 0.7 Mn 0.15 Co 0.15 ) O 2 , and Li (Ni 0.8 Mn 0.1 Co 0.1 ) O 2 .
  • the lithium secondary battery having improved high temperature storage characteristics and cycle life characteristics may be manufactured by including the same.
  • Ionizable lithium salts Organic solvents
  • electrolyte solution for a lithium secondary battery comprising an additive
  • the additive is a mixed additive comprising tetravinylsilane (TVS): lithium difluorophosphate (LiDFP): 1,3-propylene sulfate (PPS) in a weight ratio of 1: 3 to 20: 3 to 20,
  • the additive provides a nonaqueous electrolyte solution for a lithium secondary battery, which is included in an amount of 1% by weight to 4% by weight based on the total weight of the nonaqueous electrolyte solution for a lithium secondary battery.
  • the ionizable lithium salts may be used without limitation, those conventionally used in the electrolyte solution for lithium secondary batteries, and include, for example, Li + as a cation.
  • anion include F -, Cl -, Br - , I -, NO 3 -, N (CN) 2 -, BF 4 -, ClO 4 -, AlO 4 -, AlCl 4 -, PF 6 -, SbF 6 - , AsF 6 -, B 10 Cl 10 -, BF 2 C 2 O 4 -, BC 4 O 8 -, PF 4 C 2 O 4 -, PF 2 C 4 O 8 -, (CF 3) 2 PF 4 -, (CF 3) 3 PF 3 - , (CF 3) 4 PF 2 -, (CF 3) 5 PF -, (CF 3) 6 P -, CF 3 SO 3 -, C 4 F 9 SO 3 -, CF 3 CF 2 SO 3 -, (CF 3 SO 2) 2 N -, (FSO 2) 2 N -, CF 3 CF 2 (CF 3) 2 CO -, (CF 3 SO 2) 2 CH -, CH 3 SO 3 -,
  • the lithium salt is LiCl, LiBr, LiI, LiClO 4 , LiBF 4 , LiB 10 Cl 10 , LiPF 6 , LiCF 3 SO 3 , LiCH 3 CO 2 , LiCF 3 CO 2 , LiAsF 6 , LiSbF 6 , LiAlCl 4 , LiAlO 4 , and LiCH 3 SO 3
  • It may include a single or a mixture of two or more selected from the group consisting of, in addition to these LiBTI (lithium bisperfluoroethanesulfonimide, LiN (SO 2 CF 2 CF) commonly used in the electrolyte of the lithium secondary battery 3 ) lithium salts such as lithium imide salts represented by 2 , LiFSI (lithium fluorosulfonyl imide, LiN (SO 2 F) 2 ), and LiTFSI (lithium (bis) trifluoromethanesulfonimide, LiN (SO 2 CF 3 ) 2 )
  • the lithium salt may be appropriately changed within the range generally available, but specifically, may be included in the electrolyte solution 0.1M to 3M, specifically 0.8M to 2.5M. If the concentration of the lithium salt exceeds 3M, the film forming effect may decrease.
  • the organic solvent can be minimized by the oxidation reaction in the charge and discharge process of the secondary battery, and can exhibit the desired characteristics with the additive If there is no limit to the kind.
  • an ether solvent, an ester solvent, an amide solvent, etc. can be used individually or in mixture of 2 or more types, respectively.
  • any one selected from the group consisting of dimethyl ether, diethyl ether, dipropyl ether, methylethyl ether, methylpropyl ether and ethylpropyl ether, or a mixture of two or more thereof may be used. It is not limited to this.
  • the ester solvent may include at least one compound selected from the group consisting of a cyclic carbonate compound, a linear carbonate compound, a linear ester compound, and a cyclic ester compound.
  • cyclic carbonate compound examples include ethylene carbonate (EC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, Any one selected from the group consisting of vinylene carbonate and fluoroethylene carbonate (FEC) or a mixture of two or more thereof, and more specifically ethylene carbonate, 1,2-butylene carbonate, 2,3-butyl Ethylene carbonate, vinylene carbonate, and fluoroethylene carbonate (FEC); any one selected from the group consisting of, or a mixture of two or more thereof.
  • EC ethylene carbonate
  • 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate Any one selected from the group consisting of vinylene carbonate and fluoroethylene carbonate (FEC) or a mixture of two or more thereof, and more specifically ethylene carbonate, 1,2-butylene carbonate, 2,3-butyl
  • the nonaqueous electrolyte solution for lithium secondary batteries of the present invention includes ethylene carbonate having a high melting point as an essential component, instead of including propylene carbonate as the cyclic carbonate compound, thereby realizing the effect of improving high temperature storage characteristics and cycle characteristics.
  • linear carbonate compound examples include dimethyl carbonate (dimethyl carbonate, DMC), diethyl carbonate (diethyl carbonate, DEC), dipropyl carbonate, ethyl methyl carbonate (EMC), methylpropyl carbonate and ethylpropyl carbonate Any one selected from, or a mixture of two or more thereof may be representatively used, and more specifically, any one selected from the group consisting of dimethyl carbonate, diethyl carbonate and dipropyl carbonate, and ethyl methyl carbonate or two of them. The above mixture is mentioned.
  • the linear ester compound is any one selected from the group consisting of methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, and butyl propionate.
  • the above mixture and the like can be used representatively, but is not limited thereto.
  • the cyclic ester compound is any one selected from the group consisting of ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -valerolactone, ⁇ -caprolactone, or two or more thereof Mixtures may be used, but are not limited thereto.
  • the cyclic carbonate compound is a high viscosity organic solvent and has a high dielectric constant and is known as a solvent that dissociates lithium salts in the electrolyte.
  • the cyclic carbonate compound is mixed with a low viscosity, a low dielectric constant linear carbonate compound and a linear ester compound such as dimethyl carbonate and diethyl carbonate in an appropriate ratio, an electrolyte having high electrical conductivity can be made.
  • the organic solvent may be used by mixing a cyclic carbonate compound and a linear carbonate compound, and the weight ratio of the cyclic carbonate compound: linear carbonate compound in the organic solvent may be 10:90 to 70:30.
  • tetravinylsilane represented by the following Chemical Formula 2, which is one of the additive components, is solid SEI on the surface of the negative electrode through physical adsorption and electrochemical reaction.
  • TVS tetravinylsilane
  • an increase in resistance caused by an additional reaction of the electrolyte solution at a high temperature can be suppressed, thereby improving durability of the secondary battery at high temperature storage.
  • lithium difluorophosphate represented by the following Chemical Formula 3, which is one of the additive components, is a component that helps to form an SEI film by electrochemically decomposing on the surface of the positive electrode and the negative electrode. Through this, it is possible to realize long-term cycle life characteristics improvement effect of the secondary battery.
  • 1,3-propylene sulfate represented by the following formula (4) of one of the additive components can form a stable protective film that does not crack even when stored at a high temperature on the surface of the negative electrode.
  • the negative electrode coated with the protective film prevents gas generation by inhibiting decomposition of the non-aqueous organic solvent by the negative electrode active material even when using a highly crystallized carbon material such as natural graphite or artificial graphite as a negative electrode active material. can do.
  • the protective film does not interfere with the charge / discharge reaction of the battery. Therefore, performances such as cycle life, capacity, and resistance can be improved along with stability improvement effects at room temperature and high temperature of the secondary battery.
  • the mixed additive tetravinylsilane: lithium difluorophosphate: 1,3-propylene sulfate is specifically 1: 1: 3 to 17: 5 to 20, more specifically 1: 1: 5 to 15: 5 to 20 by weight ratio. May be included.
  • the weight ratio of the tetravinylsilane exceeds the above range, since the excess tetravinylsilane causes side reactions to increase the resistance of the battery, cycle life characteristics may be degraded.
  • the weight ratio of the tetravinylsilane is less than the above range, the gas generation reducing effect and the SEI film forming effect are insignificant.
  • the stabilizing effect is insufficient when the SEI film is formed, and thus high temperature storage characteristics and cycle life characteristics may be reduced. .
  • the non-aqueous electrolyte of the present invention can form a stable SEI film without increasing the resistance when the weight ratio of the compounds constituting the mixed additive satisfies the above range, thereby realizing an electrolyte side reaction suppression effect.
  • the total content of the additive of the present invention may be 1% by weight to 4% by weight, specifically 1.8% by weight to 4% by weight, based on the total weight of the nonaqueous electrolyte solution for a lithium secondary battery.
  • the content of the additive in the non-aqueous electrolyte may be determined by the reaction specific surface area of the positive electrode and the negative electrode. As described above, when the content of the additive is 1% by weight or more, it is possible to form a stable SEI film on the surface of the negative electrode, as well as the electrolyte and the negative electrode. By suppressing the decomposition of the electrolyte by the reaction of to implement the effect of reducing gas generation can be expected to meet the expected effect by adding each component. In addition, when the content of the additive is 4% by weight or less, it is possible not only to improve the gas generation effect, but also to form a stable SEI film on the surface of the electrode while preventing side reactions caused by excessive use of the additive and thereby increasing resistance.
  • the content of the additive exceeds 4% by weight, the gas generation effect may be improved by using the additive excessively, but as each component remains in excess, an excessively thick film is formed to increase resistance and deteriorate output. Can be.
  • the nonaqueous electrolyte according to an embodiment of the present invention includes tetravinylsilane: lithium difluorophosphate: 1,3-propylene sulfate as an additive in a weight ratio of 1: 3 to 20: 3 to 20, and the total weight of the nonaqueous electrolyte.
  • tetravinylsilane: lithium difluorophosphate: 1,3-propylene sulfate as an additive in a weight ratio of 1: 3 to 20: 3 to 20, and the total weight of the nonaqueous electrolyte.
  • a stable SEI film is formed on the surface of the negative electrode, and the decomposition of the electrolyte by the reaction between the electrolyte and the negative electrode is suppressed to the maximum, thereby improving the characteristics of the secondary battery.
  • non-aqueous electrolyte according to an embodiment of the present invention further includes other additional additives as necessary to further implement cycle life characteristics, low temperature high rate discharge characteristics, high temperature stability, overcharge prevention, and high temperature swelling effect. I can.
  • Such additional additives are not particularly limited as long as they are additives capable of forming a stable film on the surface of the anode and cathode without significantly increasing the initial resistance.
  • Such additional additives include at least one selected from the group consisting of vinylene carbonate (VC), LiBF 4 , 1,3-propane sultone (PS), and tetraphenylborate (TPB).
  • VC vinylene carbonate
  • PS 1,3-propane sultone
  • TPB tetraphenylborate
  • the weight ratio of tetravinylsilane: 1,3-propane sultone (PS) may be 1: 5 to 15 by weight.
  • the tetravinylsilane: VC or LiBF 4 may be in a weight ratio of 1: 1 to 3.
  • the additional additive may include 0.1 wt% to 5 wt%, specifically 0.1 wt% to 4 wt%, based on the total weight of the nonaqueous electrolyte solution for a lithium secondary battery. If the content of the additional additive is less than 0.1% by weight, the effect to be realized from the additional additive is insignificant, and when the content of the additional additive is more than 5% by weight, a side reaction may occur due to the excess additive.
  • secondary batteries are intercalated with lithium ions derived from lithium metal oxide used as a positive electrode during initial charging to a carbon-based electrode used as a negative electrode.
  • Reaction forms an organic material and Li 2 CO 3 , Li 2 O, LiOH, etc.
  • These form an SEI film on the surface of the cathode. Once formed, the SEI film acts as an ion tunnel that passes only lithium ions between the electrolyte and the cathode, preventing the reaction between lithium ions and the carbon-based negative electrode or other materials during repeated charge / discharge cycles. Will be performed.
  • the SEI membrane is co-caloricated with lithium ions together with lithium ions by blocking the migration of organic solvents having a large molecular weight, such as EC, DMC, DEC, PP, to the carbon-based cathode.
  • organic solvents having a large molecular weight such as EC, DMC, DEC, PP
  • the carbon material of the negative electrode reacts with the electrolyte during initial charging to form a passivation layer on the negative electrode surface to maintain stable charge and discharge without further decomposition of the electrolyte, which is consumed to form the passivation layer on the negative electrode surface.
  • the amount of charged charge is an irreversible capacity, and has a feature of not reversibly reacting at the time of discharge. For this reason, the lithium ion battery can maintain a stable life cycle without any further irreversible reaction after the initial charge reaction.
  • the lithium ion battery when the lithium ion battery is stored at a high temperature in a fully charged state (eg, stored at 60 ° C. after 100% charge of 4.15V or more), the SEI film gradually collapses due to increased electrochemical and thermal energy over time.
  • This SEI film collapse exposes the negative electrode surface, and the exposed negative electrode surface decomposes while reacting with a carbonate-based solvent in the electrolyte, causing a continuous side reaction.
  • tetravinylsilane, lithium difluorophosphate and 1,3-propylene sulfate as an additive in the above-mentioned ratio in the preparation of the non-aqueous electrolyte, a stable film is formed on the electrode surface to react with the electrolyte side reaction. By suppressing this, it is possible to prevent battery expansion during high temperature storage and improve battery characteristics.
  • a lithium secondary battery having a negative electrode, a positive electrode, a separator interposed between the negative electrode and the positive electrode and a non-aqueous electrolyte
  • the cathode provides a lithium secondary battery including lithium-nickel-manganese-cobalt oxide as a cathode active material.
  • a separator interposed between the positive electrode, the negative electrode, and the positive electrode and the negative electrode may be sequentially stacked to form an electrode assembly.
  • the positive electrode, the negative electrode, and the separator constituting the electrode assembly are conventional. Any of those manufactured by the method and used in manufacturing the lithium secondary battery may be used.
  • the positive electrode may be manufactured by forming a positive electrode mixture layer on a positive electrode current collector.
  • the cathode mixture layer may be formed by coating a cathode slurry including a cathode active material, a binder, a conductive material, a solvent, and the like on a cathode current collector, followed by drying and rolling.
  • the positive electrode current collector is not particularly limited as long as it has conductivity without causing chemical changes in the battery.
  • the positive electrode current collector may be formed of stainless steel, aluminum, nickel, titanium, calcined carbon, or carbon on the surface of aluminum or stainless steel. Surface treated with nickel, titanium, silver, or the like may be used.
  • the cathode active material may include a lithium transition metal oxide represented by Formula 1 below.
  • Such cathode active materials are representative examples of Li (Ni 0.6 Mn 0.2 Co 0.2 ) O 2 , Li (Ni 0.7 Mn 0.15 Co 0.15 ) O 2 or Li (Ni 0.8 Mn 0.1 Co 0.1 ) O 2 may be mentioned.
  • the cathode active material may be a lithium-manganese oxide (eg, LiMnO 2 , LiMn 2 O 4 , in addition to the lithium transition metal oxide represented by Chemical Formula 1).
  • Etc. lithium-cobalt-based oxides (e.g., LiCoO 2, etc.), lithium-nickel-based oxides (e.g., LiNiO 2, etc.), lithium-nickel-manganese-based oxides (e.g., LiNi 1 - Y Mn Y O 2 (where, 0 ⁇ Y ⁇ 1), LiMn 2-z Ni z O 4 (where, 0 ⁇ z ⁇ 2) and the like), lithium-nickel-cobalt-based oxide (for example, LiNi 1- Y1 Co Y1 O 2 (here, 0 ⁇ Y1 ⁇ 1), etc., lithium-manganese-cobalt based oxides (eg, LiCo 1 -Y2 Mn Y2 O 2 (here,
  • the cathode active material may be LiCoO 2 , LiMnO 2 , LiNiO 2 , or lithium nickel cobalt aluminum oxide (eg, Li (Ni 0.8 Co 0.15 Al 0.05 ) O 2, etc.).
  • the cathode active material may be included in an amount of 80 wt% to 99 wt%, specifically 93 wt% to 98 wt%, based on the total weight of solids in the cathode slurry. At this time, when the amount of the positive electrode active material is 80% by weight or less, the energy density may be lowered, thereby lowering the capacity.
  • the binder is a component that assists in bonding the active material and the conductive material to the current collector, and is generally added in an amount of 1 to 30 wt% based on the total weight of solids in the positive electrode slurry.
  • binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, Polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene-butadiene rubber, fluorine rubber, various copolymers, and the like.
  • the conductive material is not particularly limited as long as it has conductivity without causing chemical change in the battery.
  • Examples of the conductive material include carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, and thermal black.
  • Carbon powder Graphite powders such as natural graphite, artificial graphite, or graphite with very advanced crystal structure; Conductive fibers such as carbon fibers and metal fibers; Metal powders such as carbon fluoride powder, aluminum powder and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.
  • the conductive material is typically added in an amount of 1 to 30% by weight based on the total weight of solids in the positive electrode slurry.
  • the conductive material is typically added in an amount of 1 to 30% by weight based on the total weight of solids in the positive electrode slurry.
  • the conductive material is Chevron Chemical Company, Denka Singapore Private Limited, Gulf Oil Company, etc., Ketjenblack, EC series (Armak Company) Armak Company), Vulcan XC-72 (Cabot Company), and Super P (manufactured by Timcal) can also be used.
  • the solvent may include an organic solvent such as N-methyl-2-pyrrolidone (NMP), and may be used in an amount that becomes a desirable viscosity when including the positive electrode active material and optionally a binder and a conductive material.
  • NMP N-methyl-2-pyrrolidone
  • the solid content concentration in the positive electrode slurry including the positive electrode active material, and optionally the binder and the conductive material may be 10 to 70% by weight, preferably 20 to 60% by weight.
  • the negative electrode may be prepared by forming a negative electrode mixture layer on the negative electrode current collector.
  • the negative electrode mixture layer may be formed by coating a negative electrode slurry including a negative electrode active material, a binder, a conductive material, a solvent, and the like on a negative electrode current collector, followed by drying and rolling.
  • the negative electrode current collector generally has a thickness of 3 to 500 ⁇ m.
  • a negative electrode current collector is not particularly limited as long as it has high conductivity without causing chemical change in the battery.
  • copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel Surface-treated with carbon, nickel, titanium, silver, and the like on the surface, aluminum-cadmium alloy and the like can be used.
  • fine concavities and convexities may be formed on the surface to enhance the bonding strength of the negative electrode active material, and may be used in various forms such as a film, a sheet, a foil, a net, a porous body, a foam, and a nonwoven fabric.
  • the negative electrode active material may be lithium metal, a carbon material capable of reversibly intercalating / deintercalating lithium ions, a metal or an alloy of these metals and lithium, a metal complex oxide, and may dope and undo lithium. Materials, and at least one selected from the group consisting of transition metal oxides.
  • any carbon-based negative electrode active material generally used in a lithium ion secondary battery may be used without particular limitation.
  • Examples thereof include crystalline carbon, Amorphous carbons or these may be used together.
  • Examples of the crystalline carbon include graphite such as amorphous, plate, flake, spherical or fibrous natural graphite or artificial graphite, and examples of the amorphous carbon include soft carbon (soft carbon) Or hard carbon, mesophase pitch carbide, calcined coke, or the like.
  • the metals or alloys of these metals with lithium include Cu, Ni, Na, K, Rb, Cs, Fr, Be, Mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al And a metal selected from the group consisting of Sn or an alloy of these metals with lithium may be used.
  • the metal complex oxide may include PbO, PbO 2 , Pb 2 O 3 , Pb 3 O 4 , Sb 2 O 3 , Sb 2 O 4 , Sb 2 O 5 , GeO, GeO 2 , Bi 2 O 3 , Bi 2 O 4 , Bi 2 O 5 , Li x Fe 2 O 3 (0 ⁇ x ⁇ 1), Li x WO 2 (0 ⁇ x ⁇ 1), and Sn x Me 1- x Me ' y O z (Me: Mn, Fe Me ': Al, B, P, Si, Group 1, Group 2, Group 3 elements of the periodic table, halogen; 0 ⁇ x ⁇ 1;1 ⁇ y ⁇ 3; 1 ⁇ z ⁇ 8 Any one selected from the group can be used.
  • Examples of the material capable of doping and undoping lithium include Si, SiO x (0 ⁇ x ⁇ 2), Si-Y alloys (wherein Y is an alkali metal, an alkaline earth metal, a Group 13 element, a Group 14 element, a transition metal, Is an element selected from the group consisting of rare earth elements and combinations thereof, not Si), Sn, SnO 2 , Sn-Y (Y is an alkali metal, alkaline earth metal, group 13 element, group 14 element, transition metal, rare earth) An element selected from the group consisting of elements and combinations thereof, and not Sn; and at least one of these and SiO 2 may be mixed and used.
  • transition metal oxide examples include lithium-containing titanium composite oxide (LTO), vanadium oxide, lithium vanadium oxide, and the like.
  • the negative active material may be included in an amount of 80 wt% to 99 wt% based on the total weight of solids in the negative electrode slurry.
  • the binder is a component that assists the bonding between the conductive material, the active material and the current collector, and is typically added in an amount of 1 to 30 wt% based on the total weight of solids in the negative electrode slurry.
  • binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, Polyethylene, polypropylene, ethylene-propylene-diene polymer (EPDM), sulfonated-EPDM, styrene-butadiene rubber, fluorine rubber, various copolymers thereof, and the like.
  • the conductive material is a component for further improving the conductivity of the negative electrode active material, and may be added in an amount of 1 to 20 wt% based on the total weight of solids in the negative electrode slurry.
  • the conductive material is not particularly limited as long as it has conductivity without causing chemical change in the battery.
  • carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, or thermal black may be used.
  • Carbon powder such as natural graphite, artificial graphite, or graphite with very advanced crystal structure
  • Conductive fibers such as carbon fibers and metal fibers
  • Metal powders such as carbon fluoride powder, aluminum powder and nickel powder
  • Conductive whiskeys such as zinc oxide and potassium titanate
  • Conductive metal oxides such as titanium oxide
  • Conductive materials such as polyphenylene derivatives and the like can be used.
  • the solvent may include an organic solvent such as water or NMP, alcohol, etc., and may be used in an amount that becomes a desirable viscosity when including the negative electrode active material and optionally a binder and a conductive material.
  • concentration of the solids in the negative electrode slurry including the negative electrode active material and, optionally, the binder and the conductive material may be 50 wt% to 75 wt%, preferably 50 wt% to 65 wt%.
  • porous polymer films conventionally used as separators for example, polyolefins such as ethylene homopolymer, propylene homopolymer, ethylene / butene copolymer, ethylene / hexene copolymer and ethylene / methacrylate copolymer, etc.
  • the porous polymer film made of the polymer may be used alone or by laminating them, or a conventional porous nonwoven fabric, for example, a non-woven fabric made of high melting point glass fiber, polyethylene terephthalate fiber, or the like may be used. It is not.
  • the external shape of the lithium secondary battery of the present invention is not particularly limited, but may be cylindrical, square, pouch type, or coin type using a can.
  • Cathode active material Li (Ni 0.6 Mn 0.2 Co 0.2 ) O 2 ): conductive material (carbon black): binder (polyvinylidene fluoride) in a 90: 5: 5 weight ratio N-methyl-2-pyrrolidone as a solvent (NMP) was added to prepare a positive electrode slurry (40 wt% solids).
  • the positive electrode slurry was applied to one surface of a positive electrode current collector (Al thin film) having a thickness of 20 ⁇ m, and dried and roll pressed to prepare a positive electrode.
  • a negative electrode active material artificial graphite: conductive material (carbon black): binder (polyvinylidene fluoride) was added to N-methyl-2-pyrrolidone (NMP) as a solvent in a 90: 5: 5 weight ratio to give a negative electrode.
  • NMP N-methyl-2-pyrrolidone
  • a slurry 40 wt% solids was prepared. The negative electrode slurry was applied to one surface of a negative electrode current collector (Cu thin film) having a thickness of 20 ⁇ m, and dried and roll pressed to prepare a negative electrode.
  • the non-aqueous electrolyte of Example 1 prepared by pouring the lithium secondary battery (battery capacity 340 mAh) was prepared.
  • non-aqueous electrolyte solution In the preparation of the non-aqueous electrolyte solution, the same method as in Example 1, except that 96.4 g of organic solvent contained 0.1 g of tetravinylsilane, 1.5 g of lithium difluorophosphate, and 2 g of 1,3-propylene sulfate as mixed additives.
  • 96.4 g of organic solvent contained 0.1 g of tetravinylsilane, 1.5 g of lithium difluorophosphate, and 2 g of 1,3-propylene sulfate as mixed additives.
  • the non-aqueous electrolyte was prepared in the same manner as in Example 1, except that 98.2 g of the organic solvent contained 0.05 g, 0.75 g of lithium difluorophosphate, and 1.0 g of 1,3-propylene sulfate as an additive. And a lithium secondary battery was prepared (see Table 1 below).
  • non-aqueous electrolyte In preparing the non-aqueous electrolyte, the same method as in Example 1 except that 97.4 g of organic solvent contains 0.1 g of tetravinylsilane, 1.0 g of lithium difluorophosphate, and 1.5 g of 1,3-propylene sulfate as additives. To prepare a non-aqueous electrolyte and a lithium secondary battery (see Table 1 below).
  • non-aqueous electrolyte In the preparation of the non-aqueous electrolyte, the same method as in Example 1 except that 97.9 g of organic solvent contains 0.1 g of tetravinylsilane, 1.0 g of lithium difluorophosphate, and 1.0 g of 1,3-propylene sulfate as an additive.
  • organic solvent contains 0.1 g of tetravinylsilane, 1.0 g of lithium difluorophosphate, and 1.0 g of 1,3-propylene sulfate as an additive.
  • non-aqueous electrolyte In the preparation of the non-aqueous electrolyte, the same method as in Example 1 except that 96.9 g of organic solvent contains 0.1 g of tetravinylsilane, 2.0 g of lithium difluorophosphate, and 1 g of 1,3-propylene sulfate as a mixed additive.
  • organic solvent contains 0.1 g of tetravinylsilane, 2.0 g of lithium difluorophosphate, and 1 g of 1,3-propylene sulfate as a mixed additive.
  • EC ethylene carbonate
  • EMC ethyl methyl carbonate
  • a nonaqueous electrolyte and a lithium secondary battery were manufactured in the same manner as in Example 1, except that 2g was included (see Table 1 below).
  • non-aqueous electrolyte solution In the preparation of the non-aqueous electrolyte solution, the same method as in Example 1 except that 0.5 g of tetravinylsilane, 1.25 g of lithium difluorophosphate, and 1.25 g of 1,3-propylene sulfate were included as a mixed additive in 97 g of an organic solvent. To prepare a non-aqueous electrolyte and a lithium secondary battery (see Table 1 below).
  • non-aqueous electrolyte solution In preparing the non-aqueous electrolyte solution, the same procedure as in Comparative Example 3 was performed except that 96.9 g of organic solvent contained 0.1 g of tetravinylsilane, 0.5 g of lithium difluorophosphate, and 2.5 g of 1,3-propylene sulfate as a mixed additive.
  • a non-aqueous electrolyte and a lithium secondary battery were prepared by the method (see Table 1 below).
  • non-aqueous electrolyte solution In preparing the non-aqueous electrolyte solution, the same procedure as in Comparative Example 3 was performed except that 97.15 g of organic solvent contained 0.1 g of tetravinylsilane, 0.3 g of lithium difluorophosphate, and 2.4 g of 1,3-propylene sulfate as a mixed additive.
  • a non-aqueous electrolyte and a lithium secondary battery were prepared by the method (see Table 1 below).
  • non-aqueous electrolyte solution In the preparation of the non-aqueous electrolyte solution, the same procedure as in Comparative Example 3 was performed except that 97.45 g of organic solvent contained 0.15 g of tetravinylsilane, 2.1 g of lithium difluorophosphate, and 0.3 g of 1,3-propylene sulfate as mixed additives.
  • a non-aqueous electrolyte and a lithium secondary battery were prepared by the method (see Table 1 below).
  • the nonaqueous electrolyte and the lithium secondary were prepared in the same manner as in Comparative Example 3, except that 97 g of lithium difluorophosphate and 1.5 g of 1,3-propylene sulfate were included as a mixed additive in 97 g of an organic solvent.
  • the cell was prepared (see Table 1 below).
  • the non-aqueous electrolyte and the lithium secondary battery were prepared in the same manner as in Comparative Example 3, except that 97.25 g of the organic solvent contained 0.25 g of tetravinylsilane and 2.5 g of 1,3-propylene sulfate as a mixed additive. Was prepared (see Table 1 below).
  • the non-aqueous electrolyte and the lithium secondary battery were prepared in the same manner as in Comparative Example 3, except that 97.25 g of the organic solvent contained 0.25 g of tetravinylsilane and 2.5 g of lithium difluorophosphate as a mixed additive. Prepared (see Table 1 below).
  • lithium cobalt composite oxide Li (Ni 0.6 Mn 0.2 Co 0.2 ) O 2
  • each of the secondary batteries prepared in Examples 1 to 6 and Comparative Examples 1 to 10 were charged at 1C to 4.25V / 55mA at 25 ° C under CC / CV conditions, and then discharged at 2C to 3.0V under CC conditions ( 1000 cycles / 1 cycle ⁇ 100) to measure 100 cycle life characteristics at room temperature, and the results are shown in Table 1 below.
  • Each secondary battery prepared in Examples 1 to 6 and Comparative Examples 1 to 10 was stored at 60 ° C. for 16 weeks at room temperature, and then charged to 1 C at 4.25 V / 55 mA at CC / CV conditions at room temperature, followed by CC conditions. Discharge at 2C to 2.5V, calculate the discharge capacity as a percentage after 16 weeks (capacity after 16 weeks / initial discharge capacity x 100 (%)), and measure the capacity after high temperature storage. The results are shown in Table 1 below.

Landscapes

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

Abstract

La présente invention concerne un électrolyte non aqueux destiné à une batterie rechargeable au lithium et une batterie rechargeable au lithium le comprenant, et en particulier, un électrolyte non aqueux destiné à une batterie rechargeable au lithium et une batterie rechargeable au lithium le comprenant, cet électrolyte non aqueux destiné à une batterie rechargeable au lithium comprenant un sel de lithium ionisable, un solvant organique et un additif, l'additif comprenant du tétravinylsilane, du difluorophosphate de lithium et du 1,3-propylène sulfate selon un rapport pondéral de 1/3 à 20/3 à 20, et la teneur totale de l'additif étant de 1 % en poids à 4 % en poids par rapport au poids total de l'électrolyte non aqueux destiné à une batterie rechargeable au lithium.
PCT/KR2018/000873 2017-01-20 2018-01-18 Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant WO2018135889A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/085,333 US10700381B2 (en) 2017-01-20 2018-01-18 Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same
PL18741574T PL3416228T3 (pl) 2017-01-20 2018-01-18 Niewodny roztwór elektrolitu dla akumulatora litowego i zawierający go akumulator litowy
EP18741574.0A EP3416228B1 (fr) 2017-01-20 2018-01-18 Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant
CN201880001466.XA CN109075387B (zh) 2017-01-20 2018-01-18 用于锂二次电池的非水电解质溶液和包括该非水电解质溶液的锂二次电池

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2017-0010043 2017-01-20
KR20170010043 2017-01-20
KR10-2018-0006125 2018-01-17
KR1020180006125A KR102053313B1 (ko) 2017-01-20 2018-01-17 리튬 이차전지용 비수 전해액 및 이를 포함하는 리튬 이차전지

Publications (1)

Publication Number Publication Date
WO2018135889A1 true WO2018135889A1 (fr) 2018-07-26

Family

ID=62908545

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/000873 WO2018135889A1 (fr) 2017-01-20 2018-01-18 Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant

Country Status (2)

Country Link
CN (1) CN109075387B (fr)
WO (1) WO2018135889A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3416228A4 (fr) * 2017-01-20 2019-04-24 LG Chem, Ltd. Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant
CN111146500A (zh) * 2019-12-23 2020-05-12 东莞市杉杉电池材料有限公司 一种快充型锂离子电池非水电解液及含有该电解液的锂离子电池
CN113764738A (zh) * 2021-10-12 2021-12-07 远景动力技术(江苏)有限公司 改善电池高温存储特性的电解液以及锂离子电池
CN116417570A (zh) * 2023-06-12 2023-07-11 蔚来电池科技(安徽)有限公司 二次电池和装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102529247B1 (ko) * 2019-05-02 2023-05-08 주식회사 엘지에너지솔루션 리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지
CN110416606B (zh) * 2019-05-30 2022-07-15 贵州兴锂新能源科技有限公司 一种用于硅碳负极锂离子电池的电解液
CN111313086B (zh) * 2019-12-24 2022-11-01 安徽圣格能源科技有限公司 一种电解液及锂离子电池
CN112531213A (zh) * 2020-12-09 2021-03-19 远景动力技术(江苏)有限公司 兼顾高温特性与常温循环的非水电解液、其应用及锂离子电池
CN112531212B (zh) * 2020-12-09 2021-12-07 远景动力技术(江苏)有限公司 兼顾高温特性与低阻抗的非水电解液、其应用及锂离子电池
CN114373981A (zh) * 2022-01-18 2022-04-19 香河昆仑新能源材料股份有限公司 一种锂离子电池非水电解液及其锂离子电池
CN114447435A (zh) * 2022-01-21 2022-05-06 恒实科技发展(南京)有限公司 用于锂二次电池的非水电解液及其制备方法和应用

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120011209A (ko) * 2010-07-28 2012-02-07 주식회사 엘지화학 리튬 이차전지용 비수 전해액 및 이를 함유한 리튬 이차전지
US20140120414A1 (en) * 2011-06-09 2014-05-01 Asahi Kasei Kabushiki Kaisha Materials for Battery Electrolytes and Methods for Use
JP2016035820A (ja) * 2014-08-01 2016-03-17 セントラル硝子株式会社 非水電解液電池用電解液、及びこれを用いた非水電解液電池
KR20160036810A (ko) * 2014-09-26 2016-04-05 주식회사 엘지화학 비수성 전해액 및 이를 포함하는 리튬 이차 전지
KR101683534B1 (ko) * 2015-07-09 2016-12-07 파낙스 이텍(주) 이차전지 전해액 및 이를 포함하는 이차전지

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101572331A (zh) * 2009-06-09 2009-11-04 东莞市杉杉电池材料有限公司 一种适用于高温环境的锂离子电池电解液及制备方法
CN104025353A (zh) * 2011-10-04 2014-09-03 旭化成株式会社 用于电池组电解质的材料及使用方法
CN105958120B (zh) * 2016-06-28 2019-05-21 宁德时代新能源科技股份有限公司 一种电解液及使用该电解液的锂离子电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120011209A (ko) * 2010-07-28 2012-02-07 주식회사 엘지화학 리튬 이차전지용 비수 전해액 및 이를 함유한 리튬 이차전지
US20140120414A1 (en) * 2011-06-09 2014-05-01 Asahi Kasei Kabushiki Kaisha Materials for Battery Electrolytes and Methods for Use
JP2016035820A (ja) * 2014-08-01 2016-03-17 セントラル硝子株式会社 非水電解液電池用電解液、及びこれを用いた非水電解液電池
KR20160036810A (ko) * 2014-09-26 2016-04-05 주식회사 엘지화학 비수성 전해액 및 이를 포함하는 리튬 이차 전지
KR101683534B1 (ko) * 2015-07-09 2016-12-07 파낙스 이텍(주) 이차전지 전해액 및 이를 포함하는 이차전지

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3416228A4 (fr) * 2017-01-20 2019-04-24 LG Chem, Ltd. Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant
US10700381B2 (en) 2017-01-20 2020-06-30 Lg Chem, Ltd. Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same
CN111146500A (zh) * 2019-12-23 2020-05-12 东莞市杉杉电池材料有限公司 一种快充型锂离子电池非水电解液及含有该电解液的锂离子电池
CN113764738A (zh) * 2021-10-12 2021-12-07 远景动力技术(江苏)有限公司 改善电池高温存储特性的电解液以及锂离子电池
CN113764738B (zh) * 2021-10-12 2024-05-14 远景动力技术(江苏)有限公司 改善电池高温存储特性的电解液以及锂离子电池
CN116417570A (zh) * 2023-06-12 2023-07-11 蔚来电池科技(安徽)有限公司 二次电池和装置
CN116417570B (zh) * 2023-06-12 2023-08-22 蔚来电池科技(安徽)有限公司 二次电池和装置

Also Published As

Publication number Publication date
CN109075387B (zh) 2022-01-04
CN109075387A (zh) 2018-12-21

Similar Documents

Publication Publication Date Title
WO2018135889A1 (fr) Électrolyte non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant
WO2018135915A1 (fr) Procédé de fabrication d'une batterie secondaire au lithium présentant des caractéristiques améliorées de stockage à haute température
WO2019156539A1 (fr) Solution d'électrolyte non aqueux pour batterie rechargeable au lithium et batterie rechargeable au lithium comprenant cette dernière
WO2018135890A1 (fr) Électrolyte non aqueux pour batterie secondaire au lithium, et batterie secondaire au lithium le comprenant
WO2018093152A1 (fr) Électrolytique non aqueux pour batterie rechargeable au lithium, et batterie rechargeable au lithium le comprenant
WO2021167428A1 (fr) Solution d'électrolyte non aqueux pour batterie secondaire au lithium et batterie secondaire au lithium la comprenant
WO2019045399A2 (fr) Batterie secondaire au lithium
WO2021040388A1 (fr) Solution électrolytique non aqueuse et batterie secondaire au lithium la comprenant
WO2021033987A1 (fr) Solution d'électrolyte non aqueux pour batterie rechargeable au lithium et batterie rechargeable au lithium comprenant celle-ci
WO2023085843A1 (fr) Électrolyte non aqueux contenant un additif électrolytique non aqueux, et batterie secondaire au lithium le comprenant
WO2020213962A1 (fr) Additif de solution électrolytique non aqueuse pour batterie secondaire au lithium et solution électrolyte non aqueuse pour batterie secondaire au lithium, et batterie secondaire au lithium les comprenant
WO2017204599A1 (fr) Solution électrolytique non aqueuse pour batterie secondaire au lithium et batterie secondaire au lithium la comprenant
WO2019151725A1 (fr) Batterie secondaire au lithium présentant des caractéristiques de stockage à température élevée améliorées
WO2018131952A1 (fr) Solution d'électrolyte non aqueux et batterie secondaire au lithium la comprenant
WO2020149677A1 (fr) Solution d'électrolyte non aqueux pour accumulateur au lithium et accumulateur au lithium comprenant cette dernière
WO2020222469A1 (fr) Électrolyte non aqueux pour batterie secondaire au lithium, et batterie secondaire au lithium le comprenant
WO2021049872A1 (fr) Électrolyte non aqueux pour batterie secondaire au lithium et batterie secondaire au lithium le comprenant
WO2020197278A1 (fr) Batterie secondaire au lithium
WO2019151724A1 (fr) Batterie secondaire au lithium présentant de meilleures caractéristiques de stockage à haute température
WO2023063648A1 (fr) Électrolyte non aqueux pour batterie secondaire au lithium et batterie secondaire au lithium le comprenant
WO2019172650A1 (fr) Électrolyte non aqueux et batterie secondaire au lithium le comprenant
WO2021256825A1 (fr) Additif d'électrolyte pour batterie secondaire au lithium, électrolyte non aqueux pour batterie secondaire au lithium le comprenant, et batterie secondaire au lithium
WO2021101174A1 (fr) Solution d'électrolyte non aqueux pour batterie secondaire au lithium et batterie secondaire au lithium la comprenant
WO2021241976A1 (fr) Additif d'électrolyte pour batterie secondaire, électrolyte non aqueux pour batterie secondaire au lithium le comprenant et batterie secondaire au lithium
WO2020096411A1 (fr) Électrolyte non aqueux pour batterie secondaire au lithium, et batterie secondaire au lithium le contenant

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2018741574

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 2018741574

Country of ref document: EP

Effective date: 20180914

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18741574

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE