WO2016053041A1 - Électrolyte polymère en gel et batterie secondaire au lithium le comprenant - Google Patents

Électrolyte polymère en gel et batterie secondaire au lithium le comprenant Download PDF

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WO2016053041A1
WO2016053041A1 PCT/KR2015/010416 KR2015010416W WO2016053041A1 WO 2016053041 A1 WO2016053041 A1 WO 2016053041A1 KR 2015010416 W KR2015010416 W KR 2015010416W WO 2016053041 A1 WO2016053041 A1 WO 2016053041A1
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compound
polymer electrolyte
gel polymer
carbonate
composition
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PCT/KR2015/010416
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English (en)
Korean (ko)
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박솔지
안경호
오정우
이철행
정이진
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주식회사 엘지화학
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Priority to US15/516,146 priority Critical patent/US10276893B2/en
Priority to EP15848091.3A priority patent/EP3203566B1/fr
Priority to JP2017517750A priority patent/JP6612859B2/ja
Priority to CN201580053802.1A priority patent/CN106797053B/zh
Priority claimed from KR1020150138643A external-priority patent/KR101797295B1/ko
Publication of WO2016053041A1 publication Critical patent/WO2016053041A1/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
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • 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 gel polymer electrolyte and a secondary battery comprising the same.
  • lithium secondary batteries having high energy density and voltage among these secondary batteries are commercially used and widely used.
  • Lithium metal oxide is used as a positive electrode active material of a lithium secondary battery, and lithium metal, a lithium alloy, crystalline or amorphous carbon or a carbon composite material is used as a negative electrode active material.
  • the active material is applied to a current collector with a suitable thickness and length, or the active material itself is applied in a film shape to form an electrode group by winding or laminating together with a separator, which is an insulator, and then put it in a can or a similar container, and then injecting an electrolyte solution.
  • a secondary battery is manufactured.
  • an electrolyte in a liquid state particularly an ion conductive organic liquid electrolyte in which salts are dissolved in a non-aqueous organic solvent, has been mainly used.
  • the use of the electrolyte in the liquid state is not only highly likely to deteriorate the electrode material and volatilize the organic solvent, but also has problems in safety such as combustion due to an increase in the ambient temperature and the temperature of the battery itself.
  • a lithium secondary battery has a problem in that gas is generated inside the battery due to decomposition of a carbonate organic solvent and / or side reaction between the organic solvent and the electrode during charging and discharging, thereby expanding the battery thickness, and the reaction is accelerated at high temperature storage. Thus, the amount of gas generated is further increased.
  • This continuously generated gas causes an increase in the internal pressure of the battery, which causes the center of the specific surface of the battery to deform such as swelling of the square battery in a specific direction, as well as a local difference in adhesion at the electrode surface of the battery. This causes the problem that the electrode reaction does not occur equally in the entire electrode surface. Therefore, the performance and safety degradation of the battery is necessarily caused.
  • the problem to be solved by the present invention is to provide a composition for a gel polymer electrolyte and a lithium secondary battery comprising the same by including a mixed compound in the electrolyte, which can not only improve the life of the battery but also improve the capacity characteristics of the battery. will be.
  • the present invention provides a composition for a gel polymer electrolyte comprising an electrolyte solution solvent, a lithium salt, a polymerization initiator, and a mixed compound of the first compound and the second compound.
  • the first compound may be an amine compound including polyethylene glycol as a functional group
  • the second compound may be an epoxy compound
  • the present invention also provides a lithium secondary battery including a positive electrode, a negative electrode, a separator, and a gel polymer electrolyte, wherein the gel polymer electrolyte is formed by polymerizing the composition for the gel polymer electrolyte.
  • the gel polymer electrolyte may include an oligomer represented by Chemical Formulas 1 and 2 below.
  • n and m are each an integer of 1 to 20, and each of R 1 to R 5 is independently hydrogen or —CO (CH 2 ) 3 COO— (CH 2 CH 2 O) x—CH 3 , x is an integer from 1 to 100, wherein R 1 to R at least 3 or more of the 5, -CO (CH 2) 3 COO- ( CH 2 CH 2 O) x -CH 3.
  • a is an integer from 1 to 100.
  • a lithium secondary compound is obtained by including an amine compound in which a first compound contains polyethylene glycol as a functional group, and a second compound include a mixed compound of a first compound and a second compound, which are epoxy compounds.
  • Figure 2 is a graph showing the increase in thickness after high temperature storage of the secondary battery prepared in Examples 5-7.
  • Gel polymer electrolyte composition according to an embodiment of the present invention comprises an electrolyte solvent, a lithium salt, a polymerization initiator, and a mixed compound of the first compound and the second compound, wherein the first compound comprises polyethylene glycol as a functional group It may be an amine compound, the second compound may be an epoxy compound.
  • the first compound may be polyimine including ethylene glycol, and for example, poly (ethylene imine) -graft-poly (ethylene glycol) (PEI-PEG) may be applied.
  • the second compound may be polyethylene glycol having two or more epoxy groups, and for example, polyethylene diglycidyl ether or the like may be applied.
  • the solubility in the composition for gel polymer electrolyte is increased and is stably fixed on the gel structure in the gel polymer electrolyte.
  • the presence of the second compound including the epoxy-based compound may be mixed to more easily perform the hopping phenomenon of FIG. 1 to be described later to increase the ion mobility of the gel polymer electrolyte generated by the polymerization reaction, thereby improving output characteristics. Can improve.
  • the first compound may be included in an amount of 1 to 15% by weight, specifically 3 to 12% by weight, and more specifically 4 to 10% by weight, based on the total weight of the gel polymer electrolyte composition.
  • the first compound When the first compound is included in an amount of 1% by weight or more based on the total weight of the gel polymer electrolyte composition, gelling of the gel polymer electrolyte composition may be more smoothly performed, and the high temperature storage property is improved, thereby increasing the thickness of the battery during high temperature storage. It can be reduced, the tendency is more pronounced when the content is specifically 3% by weight, more specifically 4% by weight.
  • the first compound when the first compound is included in an amount of 15% by weight or less based on the total weight of the composition for the gel polymer electrolyte, while exhibiting the effect of improving the gelling and high temperature storage characteristics as described above, preventing the increase in resistance of the battery due to excessive content can do.
  • the first compound and the second compound may be in a weight ratio of 1: 0.2 to 0.6, specifically 1: 0.25 to 0.5.
  • the first compound and the second compound satisfies the weight ratio of 1: 0.2 to 0.6, gelation of the gel polymer electrolyte composition can be made more smoothly, and the high temperature storage property is improved to reduce the increase in thickness of the battery during high temperature storage.
  • the hopping phenomenon may be more easily performed to increase the ion mobility of the gel polymer electrolyte produced by the polymerization reaction, thereby improving output characteristics.
  • the mixed compound when the mixed compound is included in the gel polymer electrolyte composition, unlike the case of using a general electrolyte solution in which the metal ions eluted from the positive electrode are precipitated from the negative electrode, eluted from the positive electrode Metal ions can be combined with the mixed compound to reduce the precipitation of metal at the negative electrode. As a result, the charge and discharge efficiency of the lithium secondary battery can be improved and good cycle characteristics can be exhibited.
  • the composition for a gel polymer electrolyte including the monomer having the functional group is applied to a lithium secondary battery, there is little risk of leakage and a flame retardant property to improve the stability of the battery.
  • the mixed compound of the first compound and the second compound may be 0.1 wt% to 10 wt%, preferably 0.5 wt% to 5 wt%, based on the total weight of the composition for gel polymer electrolyte. If it is less than 0.1% by weight it is difficult to gel the gel polymer electrolyte properties, and if it exceeds 10% by weight may increase the resistance due to the excessive content of the monomer may decrease the battery performance.
  • the first compound and the second compound may be mixed to react for 2 minutes to 12 hours in a temperature range of 30 °C to 100 °C to prepare a polymerizable monomer.
  • the content ratio of the monomer having a functional group and the branched monomer may be, for example, a weight ratio of 1:18 to 1:75, but is not limited thereto.
  • lithium ions are small in size, and thus, are not only relatively easy to move directly, but also easily move to a hopping phenomenon in the electrolyte as shown in FIG. 1.
  • the ionizable lithium salts included in the electrolyte composition according to an embodiment of the present invention may be, for example, LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiClO 4 , LiN (C 2 F 5 SO 2 ) 2 , LiN (CF 3 SO 2 ) 2 , CF 3 SO 3 Li, LiC (CF 3 SO 2 ) 3 And LiC 4 BO 8 It may be any one selected from the group consisting of or a mixture of two or more thereof. It is not.
  • electrolyte solvent used according to an embodiment of the present invention those conventionally used in the electrolyte for lithium secondary batteries may be used without limitation, and for example, ether, ester, amide, linear carbonate, or cyclic carbonate may be used alone. Or two or more kinds thereof can be mixed.
  • carbonate compounds which are typically cyclic carbonates, linear carbonates or mixtures thereof may be included.
  • cyclic carbonate compound examples include ethylene carbonate (EC), propylene carbonate (PC), 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene Carbonate, vinylene carbonate, and any one selected from the group consisting of halides thereof, or a mixture of two or more thereof.
  • linear carbonate compound examples include dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate (DPC), ethylmethyl carbonate (EMC), methylpropyl carbonate (MPC) and ethylpropyl carbonate (EPC). Any one selected from the group consisting of, or a mixture of two or more thereof may be representatively used, but is not limited thereto.
  • propylene carbonate and ethylene carbonate which are cyclic carbonates in the carbonate electrolyte solvent, may be preferably used because they have high dielectric constants and dissociate lithium salts in the electrolyte well, such as ethylmethyl carbonate and diethyl carbonate.
  • a low viscosity, low dielectric constant linear carbonate such as dimethyl carbonate is mixed and used in an appropriate ratio, an electrolyte having high electrical conductivity can be made, and thus it can be used more preferably.
  • ester in the electrolyte solvent is methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -valerolactone And ⁇ -caprolactone, but any one selected from the group consisting of, or a mixture of two or more thereof may be used, but is not limited thereto.
  • a polymerization initiator may be used a conventional polymerization initiator known in the art.
  • Non-limiting examples of the polymerization initiator are benzoyl peroxide, acetyl peroxide, dilauryl peroxide, di-tert-butyl peroxide, organic peroxides and hydros such as t-butyl peroxy-2-ethyl-hexanoate, cumyl hydroperoxide, and hydrogen peroxide Peroxides with 2,2'-azobis (2-cyanobutane), 2,2'-azobis (methylbutyronitrile), AIBN (2,2'-Azobis (iso-butyronitrile)) and AMVN (2 And azo compounds such as 2'-Azobisdimethyl-Valeronitrile), but are not limited thereto.
  • the polymerization initiator is decomposed by heat in the cell, by way of non-limiting example, 30 ° C. to 100 ° C. or at room temperature (5 ° C. to 30 ° C.) to form radicals, and react with the polymerizable monomer by free radical polymerization. To form a gel polymer electrolyte.
  • the polymerization initiator may be used in an amount of 0.01% by weight to 2% by weight based on the total weight of the composition for gel polymer electrolyte. If the polymerization initiator is more than 2% by weight, gelation may occur too quickly or the unreacted initiator remains after the gel polymer electrolyte composition is injected into the battery, which adversely affects the battery performance. Conversely, the polymerization initiator is less than 0.01% by weight. There is a problem that the gelation is not well done.
  • the gel polymer electrolyte composition according to an embodiment of the present invention may optionally contain other additives known in the art, in addition to the components described above.
  • Gel polymer electrolyte according to an embodiment of the present invention may be formed by polymerizing the composition for gel polymer electrolyte according to a conventional method known in the art.
  • the gel polymer electrolyte may be formed by in-situ polymerization of the composition for gel polymer electrolyte in the secondary battery.
  • Injecting the composition for the gel polymer electrolyte according to the polymerization may include the step of forming a gel polymer electrolyte.
  • the in-situ polymerization reaction in the lithium secondary battery may proceed through thermal polymerization.
  • the polymerization time takes about 2 minutes to 12 hours
  • the thermal polymerization temperature may be 30 to 100 °C.
  • a gel polymer electrolyte is formed.
  • oligomers in which the polymerizable monomers are crosslinked with each other by a polymerization reaction are formed, and the liquid electrolyte in which the electrolyte salt is dissociated in the electrolyte solvent can be uniformly impregnated in the formed oligomer.
  • the oligomer according to an embodiment of the present invention may be a mixed form of the oligomer represented by the formula (1) and (2).
  • n and m are each an integer of 1 to 20, and each of R 1 to R 5 is independently hydrogen or —CO (CH 2 ) 3 COO— (CH 2 CH 2 O) x—CH 3 , x is an integer from 1 to 100, wherein R 1 to R at least 3 or more of the 5, -CO (CH 2) 3 COO- ( CH 2 CH 2 O) x -CH 3.
  • a is an integer from 1 to 100.
  • the lithium secondary battery according to an embodiment of the present invention has a charge voltage of 3.0V to 5.0V, and excellent capacity characteristics of the lithium secondary battery in both a normal voltage and a high voltage region.
  • the electrode of the lithium secondary battery may be manufactured by a conventional method known in the art.
  • a slurry may be prepared by mixing and stirring a solvent, a binder, a conductive material, and a dispersant in an electrode active material, and then applying the coating (coating) to a current collector of a metal material, compressing, and drying the electrode to prepare an electrode.
  • the positive electrode active material in the positive electrode may be applied to a general voltage or a high voltage, and may be used without limitation as long as it is a compound capable of reversibly intercalating / deintercalating lithium.
  • such oxides may include sulfides, selenides, and halides.
  • a carbon material lithium metal, silicon or tin, etc. which can normally occlude and release lithium ions may be used.
  • a carbon material may be used, and as the carbon material, both low crystalline carbon and high crystalline carbon may be used.
  • Soft crystalline carbon and hard carbon are typical low crystalline carbon, and high crystalline carbon is natural graphite, Kish graphite, pyrolytic carbon, liquid crystal pitch carbon fiber.
  • High temperature calcined carbon such as (mesophase pitch based carbon fiber), meso-carbon microbeads, Mesophase pitches and petroleum or coal tar pitch derived cokes.
  • the positive electrode and / or negative electrode may be prepared by mixing and stirring a binder, a solvent, a conductive material and a dispersant, which may be commonly used as necessary, to prepare a slurry, and then applying the same to a current collector and compressing the negative electrode.
  • the binder may be polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-co-HEP), polyvinylidene fluoride (polyvinylidenefluoride), polyacrylonitrile, polymethylmethacrylate, Polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, polyacrylic acid, ethylene-propylene-diene monomer (EPDM), Various kinds of binder polymers such as sulfonated EPDM, styrene butyrene rubber (SBR), fluorine rubber, various copolymers and the like may be used.
  • PVDF-co-HEP polyvinylidene fluoride-hexafluoropropylene copolymer
  • SBR styrene butyrene rubber
  • 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 according to the exemplary embodiment of the present invention is not particularly limited, but may be cylindrical, square, pouch type, or coin type using a can.
  • EC ethylene carbonate
  • EMC ethyl methyl carbonate
  • t-butyl peroxy-2-ethylhexanoate 0.25 weight% of t-butyl peroxy-2-ethylhexanoate is added as a polymerization initiator with respect to the total weight of the composition for electrolytes which summed the weight of the said electrolyte solution, and poly (ethylene imine) -graft-poly (ethylene Glycol) (PEI-PEG) 2% by weight was added, followed by polyethylene glycol diglycidyl ether as the second compound in an amount of 1/3% by weight relative to the first compound. This produced a composition for gel polymer electrolyte.
  • PEI-PEG poly (ethylene imine) -graft-poly (ethylene Glycol)
  • Example 1 the poly (ethylene imine) -graft-poly (ethylene glycol) (PEI-PEG) as the first compound in an amount of 5% by weight, and polyethylene glycol diglycidyl ether as the second compound
  • a gel polymer electrolyte composition was prepared in the same manner as in Example 1, except that the compound was used in an amount of 1/3 wt% based on 1 compound.
  • Example 1 except that poly (ethylene imine) (PEI) was used in place of poly (ethylene imine) -graft-poly (ethylene glycol) (PEI-PEG) as the first compound. In the same manner as in the gel polymer electrolyte composition was prepared.
  • PEI poly (ethylene imine)
  • PEI-PEG poly (ethylene glycol)
  • Example 2 except that poly (ethylene imine) (PEI) was used instead of poly (ethylene imine) -graft-poly (ethylene glycol) (PEI-PEG) as the first compound.
  • PEI poly (ethylene imine)
  • PEG poly (ethylene imine) -graft-poly (ethylene glycol)
  • LiCoO 2 as a positive electrode active material
  • carbon black as a conductive material
  • PVdF as a binder
  • NMP N-methyl-2-pyrrolidone
  • the positive electrode mixture slurry was applied to a thin film of aluminum (Al), which is a positive electrode current collector having a thickness of about 20 ⁇ m, dried to prepare a positive electrode, and then subjected to roll press to prepare a positive electrode.
  • Al aluminum
  • a negative electrode mixture slurry was prepared by adding carbon powder as a negative electrode active material, PVdF as a binder, and carbon black as a conductive material at 96 wt%, 3 wt%, and 1 wt%, respectively, to NMP as a solvent.
  • the negative electrode mixture slurry was applied to a copper (Cu) thin film, which is a negative electrode current collector having a thickness of 10 ⁇ m, dried to prepare a negative electrode, and then roll-rolled to prepare a negative electrode.
  • Cu copper
  • the battery was assembled using a separator consisting of the positive electrode, the negative electrode, and three layers of polypropylene / polyethylene / polypropylene (PP / PE / PP), and the gel polymer electrolyte composition prepared in Example 1 was injected into the assembled battery. Then, the secondary battery was manufactured by heating at 80 ° C. for 2 to 30 minutes.
  • a separator consisting of the positive electrode, the negative electrode, and three layers of polypropylene / polyethylene / polypropylene (PP / PE / PP), and the gel polymer electrolyte composition prepared in Example 1 was injected into the assembled battery. Then, the secondary battery was manufactured by heating at 80 ° C. for 2 to 30 minutes.
  • Example 5 except for using the gel polymer electrolyte composition prepared in Examples 2 to 4 instead of the gel polymer electrolyte composition prepared in Example 1, the same as in Example 5 Each secondary battery was manufactured by the method of.
  • the gel polymer electrolyte composition prepared in Examples 1 to 4 was cured at 65 ° C. to observe whether gelation occurred, and the results are shown in Table 1 below.
  • a mixed compound using poly (ethylene imine) -graft-poly (ethylene glycol) (PEI-PEG) as the first compound and polyethylene glycol diglycidyl ether as the second compound The composition for a gel polymer electrolyte comprising a 2% by weight of the first compound, the content of the second compound is 1/3% by weight compared to the first compound (Example 1) and the first compound 5% by weight and the content of the second compound was 1/3 of the weight of the first compound was all gelled smoothly.
  • Each secondary battery prepared in Examples 5 to 7 was charged at a C-rate of 0.1 C (unit: mA / g) until the voltage became 4.4 V, and then the current was Charged further until 0.05 C. Then rest for 10 minutes. Then, each battery was discharged at a rate of 0.3 C until the voltage became 2.8 V. Each discharge capacity was measured, and the results are shown in Table 2, and the experiment of the battery of Example 8 without gelation of the electrolyte was not conducted.
  • the secondary battery using the composition for gel polymer electrolyte containing the mixed compound of the first compound and the second compound exhibited excellent capacity characteristics, in particular, containing a polyethylene glycol functional group as the first compound.
  • poly (ethylene imine) -graft-poly (ethylene glycol) (PEI-PEG) which is an amine compound
  • poly (ethylene imine) which is an amine compound containing no polyethylene glycol functional group
  • the content of the first compound and the second compound were the same as compared with the case of (PEI) (Example 7), it was found to exhibit better capacity characteristics.
  • PEI poly (ethylene imine)

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Abstract

La présente invention porte sur une composition pour un électrolyte polymère en gel contenant un solvant électrolytique, un sel de lithium, un initiateur de polymérisation et un composé mixte comprenant un premier composé et un second composé ; et sur une batterie secondaire au lithium comprenant une électrode positive, une électrode négative, une membrane de séparation et un électrolyte polymère en gel. Une batterie secondaire au lithium est décrite, dans laquelle l'électrolyte polymère en gel est formé par polymérisation de la composition d'électrolyte polymère en gel. La composition d'électrolyte polymère en gel de la présente invention comprend un composé mixte d'un premier composé et d'un second composé, le premier composé étant un composé à base d'amine comprenant du polyéthylène glycol comme groupe fonctionnel et le second composé étant un composé à base d'époxyde ; et peut ainsi facilement induire un phénomène de saut lorsqu'il est appliqué à une batterie secondaire au lithium, améliorer la durée de vie de la batterie, présenter un excellent stockage à des températures élevées et améliorer la capacité de la batterie.
PCT/KR2015/010416 2014-10-02 2015-10-01 Électrolyte polymère en gel et batterie secondaire au lithium le comprenant WO2016053041A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US15/516,146 US10276893B2 (en) 2014-10-02 2015-10-01 Gel polymer electrolyte and lithium secondary battery comprising the same
EP15848091.3A EP3203566B1 (fr) 2014-10-02 2015-10-01 Électrolyte polymère en gel et batterie secondaire au lithium le comprenant
JP2017517750A JP6612859B2 (ja) 2014-10-02 2015-10-01 ゲルポリマー電解質及びこれを含むリチウム二次電池
CN201580053802.1A CN106797053B (zh) 2014-10-02 2015-10-01 凝胶聚合物电解质和包括其的锂二次电池

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KR20140133469 2014-10-02
KR10-2014-0133469 2014-10-02
KR10-2015-0138643 2015-10-01
KR1020150138643A KR101797295B1 (ko) 2014-10-02 2015-10-01 겔 폴리머 전해질 및 이를 포함하는 리튬 이차전지

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111033861A (zh) * 2017-11-30 2020-04-17 株式会社Lg化学 用于凝胶聚合物电解质的组合物、由该组合物制备的凝胶聚合物电解质和包括该凝胶聚合物电解质的锂二次电池
CN111052481A (zh) * 2017-12-01 2020-04-21 株式会社Lg化学 凝胶聚合物电解质组合物和包括该凝胶聚合物电解质组合物的锂二次电池

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KR20130115687A (ko) * 2012-04-13 2013-10-22 한국과학기술연구원 고분자 젤 전해질 조성물, 이의 제조방법 및 이를 포함하는 염료감응 태양전지
KR20140097025A (ko) * 2013-01-28 2014-08-06 주식회사 엘지화학 고전압 리튬 이차 전지
KR101346414B1 (ko) * 2013-02-15 2014-01-16 한양대학교 산학협력단 겔 폴리머 전해질 및 이를 이용한 리튬이차전지

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CN111033861A (zh) * 2017-11-30 2020-04-17 株式会社Lg化学 用于凝胶聚合物电解质的组合物、由该组合物制备的凝胶聚合物电解质和包括该凝胶聚合物电解质的锂二次电池
US11522219B2 (en) 2017-11-30 2022-12-06 Lg Energy Solution, Ltd. Composition for gel polymer electrolyte, gel polymer electrolyte prepared therefrom, and lithium secondary battery including the same
CN111052481A (zh) * 2017-12-01 2020-04-21 株式会社Lg化学 凝胶聚合物电解质组合物和包括该凝胶聚合物电解质组合物的锂二次电池
CN111052481B (zh) * 2017-12-01 2023-06-02 株式会社Lg新能源 凝胶聚合物电解质组合物和包括该凝胶聚合物电解质组合物的锂二次电池

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