WO2022035272A1 - Électrolyte et batterie secondaire le comprenant - Google Patents

Électrolyte et batterie secondaire le comprenant Download PDF

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Publication number
WO2022035272A1
WO2022035272A1 PCT/KR2021/010781 KR2021010781W WO2022035272A1 WO 2022035272 A1 WO2022035272 A1 WO 2022035272A1 KR 2021010781 W KR2021010781 W KR 2021010781W WO 2022035272 A1 WO2022035272 A1 WO 2022035272A1
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Prior art keywords
electrolyte
secondary battery
lithium
additive
carbonate
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PCT/KR2021/010781
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English (en)
Korean (ko)
Inventor
윤종철
정명훈
최지영
장민정
한지성
Original Assignee
솔브레인 주식회사
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Priority claimed from KR1020210100410A external-priority patent/KR102537722B1/ko
Application filed by 솔브레인 주식회사 filed Critical 솔브레인 주식회사
Publication of WO2022035272A1 publication Critical patent/WO2022035272A1/fr

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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
    • 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
    • H01M10/0568—Liquid materials characterised by the solutes
    • 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 an electrolyte and a secondary battery including the same, and more particularly, to an electrolyte for a battery that can improve battery charging efficiency and output, enable long-term storage, and increase capacity retention at high temperatures will be.
  • Lithium secondary batteries enable smooth movement of lithium ions by putting an electrolyte between the positive and negative electrodes, and the use of electrical energy by the method in which electricity is generated or consumed by redox reactions following insertion and desorption from the positive and negative electrodes. make it easy
  • an object of the present invention is to provide an electrolyte of a novel composition and a secondary battery including the same.
  • Another object of the present invention is to provide a secondary battery having reduced charging resistance, improved output of the battery, improved recovery capacity at high temperature, so that long-term storage is possible, and excellent life retention rate at high temperature.
  • the present invention includes an organic solvent, a lithium salt, a first additive and a second additive, and the first additive includes phosphorus pentoxide.
  • the second additive is vinylene carbonate, fluoroethylene carbonate, lithium difluorophosphate, lithium difluorobis(oxalato)phosphate, 1,3-propanesultone, ethylene sulfate, succinonitrile and vinylethylene carbonate. It provides an electrolyte comprising at least one selected from the group consisting of.
  • the present invention also provides a secondary battery comprising the electrolyte.
  • the electrolyte according to the present invention When the electrolyte according to the present invention is applied as an electrolyte of a secondary battery, charging efficiency and output can be improved due to low charging resistance, and there is an effect of providing a secondary battery having excellent long-term lifespan and capacity retention even when left at high temperature.
  • the electrolyte of the present invention includes an organic solvent, a lithium salt, a first additive and a second additive, and the first additive includes phosphorus pentoxide.
  • the second additive is vinylene carbonate, fluoroethylene carbonate, lithium difluorophosphate, lithium difluorobis(oxalato)phosphate, 1,3-propanesultone, ethylene sulfate, succinonitrile and vinylethylene carbonate. It is characterized in that it contains at least one selected from the group consisting of, in this case, the charging resistance is reduced to improve the output of the battery, the recovery capacity at high temperature is improved, so that long-term storage is possible, and the lifespan maintenance rate at high temperature is improved It has an excellent effect.
  • the electrolyte of the present invention includes an organic solvent, a lithium salt, and a first additive, wherein the first additive includes phosphorus pentoxide, wherein the phosphorus pentoxide is 0.01 to 5% by weight based on 100% by weight of the total electrolyte
  • the charging resistance is reduced to improve the battery output, the recovery capacity at high temperature is improved, so that long-term storage is possible, and there is an excellent effect of maintaining a lifespan at a high temperature.
  • the electrolyte solution of the present invention includes, for example, two or more electrolyte solution additives, specifically, a first additive containing phosphorus pentoxide, and vinylene carbonate, fluoroethylene carbonate, lithium difluorophosphate, lithium difluorobis ( oxalato) phosphate, 1,3-propane sultone, ethylene sulfate, succinonitrile, and a second additive comprising at least one selected from the group consisting of vinyl ethylene carbonate, and in this case, the above-described battery output improvement effect , there is an advantage in that the high temperature recovery capacity improvement effect and the high temperature life retention improvement effect are excellent.
  • a first additive containing phosphorus pentoxide, and vinylene carbonate fluoroethylene carbonate
  • lithium difluorophosphate lithium difluorobis ( oxalato) phosphate
  • 1,3-propane sultone 1,3-propane sultone
  • the first additive is, for example, 0.01 to 10% by weight, preferably 0.01 to 5% by weight, more preferably 0.02 to 2% by weight, even more preferably 0.03 to 10% by weight based on 100% by weight of the total electrolyte solution. It may be included in an amount of 1 wt%, more preferably 0.05 to 0.5 wt%, and within this range, the desired effect can be sufficiently obtained without deterioration of battery characteristics.
  • the first additive may further include one or more selected from the group consisting of methanesulfonic acid, sulfuric acid, and phosphoric acid, for example, and in this case, a synergistic effect is obtained due to the interaction of phosphorus pentoxide with methanesulfonic acid, sulfuric acid or phosphoric acid. Therefore, there is an advantage that the battery performance improvement effect is more excellent.
  • the first additive may be in the form of a solution in which phosphorus pentoxide is dissolved in methanesulfonic acid as a preferred example, and as a specific example, 1 to 20% by weight of phosphorus pentoxide and 80 to methanesulfonic acid based on 100% by weight of the first additive 99% by weight, preferably 2 to 15% by weight of phosphorus pentoxide and 85 to 98% by weight of methanesulfonic acid, More preferably, 5 to 13% by weight of phosphorus pentoxide and 87 to 95% by weight of methanesulfonic acid, even more preferably 8 to 12% by weight of phosphorus pentoxide and 88 to 92% by weight of methanesulfonic acid, in this case Since compatibility with the electrolyte is excellent, manufacturing efficiency can be further improved, and there is an advantage in that the battery output improvement effect is more excellent.
  • the first additive includes 1 to 20% by weight of phosphorus pentoxide and 80 to 99% by weight of methanesulfonate, more preferably 2 to 15% by weight of phosphorus pentoxide and 85% by weight of methanesulfonate, in a total of 100% by weight of the first additive.
  • the methanesulfonate may be, for example, an alkali metal salt of methanesulfonic acid, and the alkali metal may be preferably lithium, sodium, or potassium, and more preferably lithium, in this case, without deterioration of other physical properties. There is an advantage that the battery performance improvement effect is more excellent.
  • the content of the phosphorus pentoxide contained in the electrolyte is, for example, 0.01 to 5% by weight, preferably 0.02 to 3% by weight, more preferably 0.03 to 1% by weight, even more preferably based on 100% by weight of the total electrolyte. It may be 0.05 to 0.5% by weight, and in a preferred embodiment, 0.05 to 0.1% by weight, and within this range, the desired effect can be sufficiently obtained without lowering other physical properties.
  • the first additive may be added to the electrolyte of the secondary battery to form a stable film on the electrode.
  • the capacity retention rate is improved by preventing the structural collapse of the electrode active material of the positive electrode and the negative electrode at a high temperature, thereby extending the life of the battery.
  • the second additive may be included, for example, in an amount of 0.01 to 5% by weight based on 100% by weight of the total electrolyte solution, preferably 0.1 to 4% by weight, more preferably 0.2 to 3.5% by weight , even more preferably It may be included in an amount of 0.3 to 2.5% by weight, more preferably 0.5 to 2.0% by weight, and within this range, the battery output improvement effect and battery life improvement effect can be sufficiently obtained without deterioration of battery characteristics.
  • the second additive may be included in an amount of 0.01 to 5% by weight, preferably 0.1 to 4.5% by weight, more preferably 0.5 to 4% by weight, based on 100% by weight of the total electrolyte solution, within this range.
  • the second additive is vinylene carbonate, fluoroethylene carbonate, lithium difluorophosphate, lithium difluorobis(oxalato)phosphate, 1,3-propanesultone, ethylene sulfate, succinonitrile and vinylethylene carbonate.
  • Including one or more selected from the group consisting of, as a preferred example, may include two or more, in this case, there is an advantage in that the battery performance improvement effect is more excellent due to the synergistic action between the additives.
  • the second additive may include one or two selected from the group consisting of vinylene carbonate, fluoroethylene carbonate, lithium difluorophosphate, and 1,3-propanesultone.
  • the additives There is an advantage in that the battery performance improvement effect is more excellent due to a synergistic action between them.
  • the second additive may further include at least one selected from the group consisting of, for example, lithium tetrafluoro oxalato phosphate and lithium trioxalato phosphate, and in this case, further improvement of low-temperature characteristics and cycle characteristics of the battery effect can be provided.
  • the organic solvent is, for example, ethylene carbonate (EC), diethyl carbonate (DEC), ethylmethyl carbonate (EMC), dimethyl carbonate (DMC), propylene carbonate (PC), dipropyl carbonate (DPC), butylene carbonate, methyl It may include two or more selected from the group consisting of propyl carbonate, ethylpropyl carbonate, methyl propionate (MP), ethyl propionate (EP), and propyl propionate (PP), and in this case, the ionic conductivity of the electrolyte , viscosity, etc. are easy to control, so there is an advantage in that the effect of improving battery performance is more excellent.
  • the organic solvent is a specific example by mixing an organic solvent of high dielectric constant having high ionic conductivity and a low-viscosity organic solvent that can be adjusted so that the viscosity of the solvent has an appropriate viscosity to be applied to the battery so as to increase the charging and discharging performance of the battery.
  • It can be used as a mixed solvent, and more specifically, EC and/or PC can be used as an example of the organic solvent of high dielectric constant, and as an example of the low-viscosity organic solvent, from the group consisting of EMC, DMC and DEC
  • EMC EMC
  • DMC low-viscosity organic solvent
  • the high dielectric constant and low viscosity organic solvent is preferably mixed in a volume ratio of 2:8 to 8:2. More specifically, it may be a ternary mixed solvent of EC and/or PC, and EMC and DEC, and the ratio of EC and/or PC:EMC:DEC may be 3:3 to 5:2 to 4.
  • the organic solvent contains water
  • lithium ions in the electrolyte may be hydrolyzed, so the water content in the organic solvent is preferably controlled to be 150 ppm or less, preferably 100 ppm or less.
  • the electrolyte may include at least one selected from the group consisting of LiPF 6 and LiFSI, for example as a lithium salt, and in this case, lithium ions are smoothly supplied to the battery, so that the battery performance is excellent.
  • the electrolyte is, for example, a lithium salt LiF 4 , LiCl, LiBr, LiI, LiClO 4 , LiB 10 Cl 10 , LiCF 3 SO 3 , LiCF 3 CO 2 , LiAsF 6 , LiSbF 6 , LiAlCl 4 , CH 3 SO 3 Li, CF 3 SO 3 Li and (CF 3 SO 2 ) 2
  • LiF 4 LiCl, LiBr, LiI, LiClO 4 , LiB 10 Cl 10
  • LiCF 3 SO 3 LiCF 3 CO 2
  • LiAsF 6 , LiSbF 6 , LiAlCl 4 CH 3 SO 3 Li, CF 3 SO 3 Li and (CF 3 SO 2 ) 2
  • At least one selected from the group consisting of NLi may be further included, and in this case, lithium ions may be more smoothly supplied.
  • the lithium salt When the lithium salt is dissolved in the electrolyte, the lithium salt functions as a source of lithium ions in the lithium secondary battery, and may promote movement of lithium ions between the positive electrode and the negative electrode. Accordingly, the lithium salt is preferably included in a concentration of about 0.6 mol% to 2 mol% of the electrolyte. If the concentration of the lithium salt is less than 0.6 mol%, the conductivity of the electrolyte may be lowered, and thus electrolyte performance may be deteriorated. Considering the conductivity of the electrolyte and the mobility of lithium ions, the lithium salt may be included in the electrolyte in an amount of preferably 0.7 mol% to 1.6 mol%, more preferably 0.8 mol% to 1.5 mol%.
  • an additive hereinafter referred to as other additives .
  • Preferred examples of the other additive component include Succinic anhydride, Tetravinyl silane, Hexamethylenetetramine, 1,1,2,2-tetrafluoroethyl 2,2,2-trifluoroethyl ether, 1,2-bis((difluorophosphaneyl)oxy)ethane, 1 ,3,6-Hexanetricarbonitrile, 1-Ethyl-3-methylimidazolium dicyanamide, Trimethoxyboroxine, Lithium Bis(oxaleto)borate, Lithium DiFluro(Oxalato) Borate, Tris(trimethylsilyl) borate, Lithium Tetrafluoroborate, Triisopropyl borate, Difluoromethyl)phosphonate Tris(trimethylsilyl) Phosphite, Tripropagyl phosphate, 2,4,8,10-Tetraoxa-3,9-dithiaspiro[5.5]undecane 3,3,9,9-
  • the other additives may be preferably included in an amount of 0.3 to 1.5 wt%, preferably 0.5 to 1.2 wt%, based on the total weight of the electrolyte, and in this case, it is preferable in terms of the effect of improving the low-temperature characteristics and cycle characteristics of the battery.
  • the secondary battery of the present invention has a negative electrode and a positive electrode.
  • a separator interposed between the cathode and the anode, and the electrolyte.
  • the positive electrode may be prepared by, for example, mixing a positive electrode active material, a binder, and optionally a conductive agent to prepare a composition for forming a positive electrode active material layer, and then applying it to a positive electrode current collector such as aluminum foil.
  • the positive active material may be, for example, a conventional NCM (lithium nickel manganese cobalt oxide) positive active material used in lithium secondary batteries, preferably of the formula Li[NixCo 1-xy Mn y ]O 2 (where 0 ⁇ x ⁇ 0.5, 0 ⁇ y ⁇ 0.5) may be a lithium composite metal oxide in the form, a specific example may be LiNiMnCoO 2 , but is not limited thereto.
  • NCM lithium nickel manganese cobalt oxide
  • Variables x and y of the formula Li[NixCo 1-xy Mn y ]O 2 of the lithium composite metal oxide are, for example, 0.0001 ⁇ x ⁇ 0.5, 0.0001 ⁇ y ⁇ 0.5, or 0.001 ⁇ x ⁇ 0.3, 0.001 ⁇ y ⁇ 0.3 can be
  • a compound capable of reversible intercalation and de-intercalation of lithium (a lithiated intercalation compound) may be used.
  • the negative electrode may be prepared by, for example, mixing a negative electrode active material, a binder, and optionally a conductive agent to prepare a composition for forming the negative electrode active material layer, and then applying it to a negative electrode current collector such as copper foil.
  • anode active material for example, a compound capable of reversible intercalation and deintercalation of lithium may be used.
  • the negative active material may be carbonaceous materials such as artificial graphite, natural graphite, graphitized carbon fiber, and amorphous carbon.
  • a metal compound capable of alloying with lithium, or a composite including a metal compound and a carbonaceous material may be used as the negative electrode active material, and may be graphite, for example.
  • metal alloyable with lithium for example, at least one of Si, Al, Sn, Pb, Zn, Bi, In, Mg, Ga, Cd, Si alloy, Sn alloy, or Al alloy may be used.
  • a metal lithium thin film may be used as the negative electrode active material.
  • the negative active material in view of high stability, any one or more selected from the group consisting of crystalline carbon, amorphous carbon, carbon composite material, lithium metal, and an alloy containing lithium may be used.
  • the battery charging resistance measured by the Hybrid Pulse Power Characterization (HPPC) method the output characteristics, and a high temperature of 45° C. or higher compared to the case where only the conventional electrolyte solution additive is added.
  • the HPPC charging resistance value measured at 60° C. may be 50 m ⁇ or less, preferably 48 m ⁇ or less, more preferably 45 m ⁇ or less, and most preferably 43 m ⁇ or less. there is.
  • the secondary battery may have a recovery capacity of 805 mAh or more at 60°C, preferably 810 mAh or more, and more preferably 815 mAh or more.
  • the lifetime maintenance efficiency at 45° C. of the secondary battery may be 80% or more, preferably 85% or more, and more preferably 87% or more.
  • the HPPC charging resistance value measured at 60° C. may be expressed as a resistance value of the battery measured after the secondary battery is left in a fully charged state at 60° C. for 5 hours.
  • the recovery capacity at 60° C. is a specific example.
  • the secondary battery is charged and discharged at room temperature (25° C.), the initial discharge capacity is measured, charged again under the same conditions, stored at 60° C. for 4 weeks, and then at room temperature again. It can be expressed as the measured residual capacity when discharged.
  • the secondary battery is repeatedly charged and discharged at 45° C. for 300 cycles, and the discharge capacity after 300 cycles of the initial discharge capacity can be expressed as a percentage (%) value.
  • the HPPC charging resistance value can be measured by a method specified in the document “Battery test manual for plug-in hybrid electric vehicles,” (2010, Idaho National Laboratory for the US Department of Energy.) It is an important indicator of battery characteristics such as battery output.
  • the charging resistance is a resistance value measured during charging of the battery, and the lower the charging resistance, the less energy loss, the charging speed may be increased, and the output of the battery may be improved.
  • the secondary battery of the present invention exhibits a low HPPC charging resistance value as described above, and thus has excellent charging speed and output, and is suitable for use as, for example, an automobile battery.
  • the recovery capacity indicates the capacity preservation characteristics of a battery left for a long time, and the discharged electric capacity when the battery left for a long time is discharged to the final discharge voltage, and the discharged battery after recharging the discharged battery to the final discharge voltage.
  • Each of the discharged electric capacity when discharged up to was measured, and the two capacity values were compared.
  • the higher the recovery capacity the smaller the amount of natural discharge due to battery preservation (storage), which means that the battery can be stored for a long time. This is a very important characteristic in a battery.
  • the electrolyte solution additive of the present invention is added to the electrolyte solution, the recovery capacity is improved by 5 to 20% compared to when only the conventional additive is used, so that it can be stored for a longer period of time with a single charge.
  • the battery of the present invention when used as a battery for an electric vehicle, output improvement, which becomes important depending on the size of the vehicle, and climate change, low temperature and Performance improvement at high temperature can be achieved, thereby exhibiting excellent performance as an automobile battery.
  • the electrolyte additive according to the embodiments of the present invention and the electrolyte containing the same are applied to a secondary battery, the charging resistance, output, recovery capacity and life efficiency are improved, and it is found that it is suitable for use as a secondary battery for automobiles. can
  • Example 1 0.05 wt% of the P 2 O 5 compound, 0.5 wt% of methanesulfonic acid, and 1.0 wt% of vinylene carbonate were added as electrolyte additives. .
  • Example 1 as an electrolyte additive, 0.05 wt% of a P 2 O 5 compound, 0.5 wt% of methanesulfonic acid, and 1.0 wt% of fluoroethylene carbonate were added as in Example 1, except that did
  • Example 1 as an electrolyte additive, 0.05 wt% of a P 2 O 5 compound, 0.5 wt% of methanesulfonic acid, and 1.0 wt% of 1,3-propane sultone were added. It was carried out in the same manner as in Example 1.
  • Example 1 0.1 wt% of the P 2 O 5 compound, 1.0 wt% of methanesulfonic acid, and 1.0 wt% of vinylene carbonate were added as electrolyte additives.
  • Example 1 the P 2 O 5 compound as an electrolyte additive 0.1% by weight, 1.0% by weight of methanesulfonic acid, and 1.0% by weight of lithium difluorophosphate was carried out in the same manner as in Example 1, except that it was added.
  • Example 1 it was carried out in the same manner as in Example 1, except that 0.05 wt% of the P 2 O 5 compound and 0.5 wt% of methanesulfonic acid were added as electrolyte additives.
  • Example 1 0.1 wt% of the P 2 O 5 compound and 1.0 wt% of methanesulfonic acid were added as electrolyte additives, and the same as in Example 1 was performed.
  • Example 1 it was carried out in the same manner as in Example 1, except that 1.0% by weight of lithium difluorophosphate was added as an electrolyte additive.
  • Example 1 it was carried out in the same manner as in Example 1, except that 1.0% by weight of lithium difluorophosphate and 1.0% by weight of vinylene carbonate were added as electrolyte additives.
  • Example 1 it was carried out in the same manner as in Example 1, except that 1.0% by weight of lithium difluorophosphate, 1.0% by weight of vinylene carbonate, and 1.0% by weight of methanesulfonic acid were added as electrolyte additives.
  • the positive electrode mixture slurry was applied to an aluminum (Al) thin film as a positive electrode current collector having a thickness of about 20 ⁇ m, dried to prepare a positive electrode, and then a positive electrode was manufactured by performing a roll press.
  • the negative electrode mixture slurry was applied to a 10 ⁇ m-thick copper (Cu) thin film as a negative electrode current collector, dried to prepare a negative electrode, and then roll press was performed to prepare a negative electrode.
  • the measured voltage value, the charge/discharge current value corresponding to the C-rate, the amount of change in current ( ⁇ I), and the amount of change in the discharge voltage ( ⁇ V) , charge voltage change amount ( ⁇ V), discharge resistance, and charge resistance were measured, and the resistance value was calculated using the slope value obtained from the current and voltage change amount by briefly flowing the charge/discharge current for each C-rate for a certain period of time.
  • the charging conditions were a constant current of 1.0C and a voltage of 4.2V, until the charging current became 1/10C.
  • Discharge conditions were performed by charging and discharging by discharging up to 3.0V at a constant current of 1.0C, and then the discharge capacity was measured.
  • the secondary battery was charged with a constant current at 45° C. with a current of 1C rate until the voltage reached 4.20V (vs. Li), and then cut-off at a current of 0.05C while maintaining 4.20V in the constant voltage mode. did Then, it was discharged at a constant current of 1C rate until the voltage reached 3.0V (vs. Li) during discharge (1st cycle). The above cycle was repeated 300 times and the average value thereof was calculated.
  • the charging resistance is 39.3 to 42.8 m ⁇
  • the high temperature recovery capacity is 816.3 to 830.6 mAh
  • the high temperature life efficiency is
  • the charging resistance is at least about 10 m ⁇ higher than in Examples 1 to 6, and the high temperature recovery capacity is at least about 11 mAh lower, The high-temperature lifetime efficiency was at least about 2% lower.
  • the electrolyte of the present invention has the effect of improving the charging efficiency and output of the secondary battery, and improving the long-term storage efficiency and capacity retention rate at high temperatures.

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Abstract

La présente invention concerne un électrolyte et une batterie secondaire le comprenant, et, plus particulièrement, un électrolyte et une batterie secondaire le comprenant, qui comprennent un solvant organique, un sel de lithium, un premier additif et un second additif, le premier additif comprenant du pentoxyde de phosphore. Selon la présente invention, un effet obtenu consiste à fournir une batterie secondaire qui peut présenter une efficacité de charge et un rendement améliorés grâce à une faible résistance à la charge, ainsi qu'une excellente longue durée de vie et une excellente rétention de capacité à haute température.
PCT/KR2021/010781 2020-08-13 2021-08-13 Électrolyte et batterie secondaire le comprenant WO2022035272A1 (fr)

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Application Number Priority Date Filing Date Title
KR20200101997 2020-08-13
KR10-2020-0101997 2020-08-13
KR1020210100410A KR102537722B1 (ko) 2020-08-13 2021-07-30 전해액 및 이를 포함하는 이차전지
KR10-2021-0100410 2021-07-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023080633A1 (fr) * 2021-11-05 2023-05-11 솔브레인 주식회사 Électrolyte et batterie secondaire le comprenant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050011213A (ko) * 2003-07-22 2005-01-29 주식회사 엘지화학 고온 보존 특성이 향상된 리튬 2차 전지
JP2005149786A (ja) * 2003-11-12 2005-06-09 Sanyo Electric Co Ltd リチウム二次電池及びその製造方法
US20070031734A1 (en) * 2005-08-02 2007-02-08 Jiang Fan Electrolyte additives for lithium metal and lithium ion rechargeable batteries
JP2016051600A (ja) * 2014-08-29 2016-04-11 富山薬品工業株式会社 蓄電デバイス用非水電解液
KR20200082557A (ko) * 2018-12-31 2020-07-08 주식회사 엔켐 리튬이차전지용 전해액 및 이를 포함한 리튬이차전지

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050011213A (ko) * 2003-07-22 2005-01-29 주식회사 엘지화학 고온 보존 특성이 향상된 리튬 2차 전지
JP2005149786A (ja) * 2003-11-12 2005-06-09 Sanyo Electric Co Ltd リチウム二次電池及びその製造方法
US20070031734A1 (en) * 2005-08-02 2007-02-08 Jiang Fan Electrolyte additives for lithium metal and lithium ion rechargeable batteries
JP2016051600A (ja) * 2014-08-29 2016-04-11 富山薬品工業株式会社 蓄電デバイス用非水電解液
KR20200082557A (ko) * 2018-12-31 2020-07-08 주식회사 엔켐 리튬이차전지용 전해액 및 이를 포함한 리튬이차전지

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023080633A1 (fr) * 2021-11-05 2023-05-11 솔브레인 주식회사 Électrolyte et batterie secondaire le comprenant

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