WO2016104896A1 - Électrolyte pour batterie rechargeable au lithium et batterie rechargeable au lithium le comprenant - Google Patents

Électrolyte pour batterie rechargeable au lithium et batterie rechargeable au lithium le comprenant Download PDF

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WO2016104896A1
WO2016104896A1 PCT/KR2015/006688 KR2015006688W WO2016104896A1 WO 2016104896 A1 WO2016104896 A1 WO 2016104896A1 KR 2015006688 W KR2015006688 W KR 2015006688W WO 2016104896 A1 WO2016104896 A1 WO 2016104896A1
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hexafluorophosphate
tetrafluoroborate
electrolyte
lithium secondary
secondary battery
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PCT/KR2015/006688
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English (en)
Korean (ko)
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고주환
전종호
김진희
조성님
유태환
조정주
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삼성정밀화학 주식회사
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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 a lithium secondary battery electrolyte and a lithium secondary battery having the same, and more particularly, to a lithium secondary battery electrolyte and a lithium secondary battery having the same which can improve the high temperature life characteristics of the battery.
  • Such a lithium secondary battery has a structure in which an electrolyte solution containing lithium salt is impregnated in an electrode assembly having a porous separator interposed between a positive electrode and a negative electrode on which an active material is coated on an electrode current collector.
  • an electrolyte solution containing lithium salt is impregnated in an electrode assembly having a porous separator interposed between a positive electrode and a negative electrode on which an active material is coated on an electrode current collector.
  • the electrolyte solution generally contains an organic solvent and an electrolyte salt, for example, in a mixed solvent of a highly viscous linear carbonate such as propylene carbonate and ethylene carbonate and a low viscosity chain carbonate such as diethyl carbonate, ethyl methyl carbonate and dimethyl carbonate.
  • a highly viscous linear carbonate such as propylene carbonate and ethylene carbonate
  • a low viscosity chain carbonate such as diethyl carbonate, ethyl methyl carbonate and dimethyl carbonate.
  • lithium salts such as LiPF 6 , LiBF 4 , and LiClO 4 are commonly used.
  • Lithium-containing halogen salts such as lithium-containing fluoride salts and lithium-containing chloride salts, which are mainly used as the electrolyte salts, react very sensitively to moisture, and thus react with water present in the battery manufacturing process or in the battery to form HX, which is a strong acid.
  • X F, Cl, Br, I
  • LiPF 6 lithium salts are unstable at high temperatures so that anions can be thermally decomposed to produce acidic materials such as hydrofluoric acid (HF). Such acidic substances are necessarily accompanied by undesirable side reactions when present in the cell.
  • the anode interface resistance may increase due to adsorption of the surface of the anode of lithium fluoride (LiF), which is a by-product of the formation of hydrofluoric acid (HF), the anode interface resistance may increase.
  • the HX may cause a rapid oxidation reaction in the battery to dissolve and degrade the positive electrode active material, and particularly when the transition metal cation contained in the lithium metal oxide used as the positive electrode active material is eluted.
  • the cations are deposited on the cathode, an additional cathode film is formed to further increase the cathode resistance.
  • the SEI film is a polar non-aqueous solvent of the carbonate system is formed on the surface of the negative electrode by reacting with lithium ions in the electrolyte during the initial charging of the lithium secondary battery, to stabilize the battery by inhibiting decomposition of the carbonate-based electrolyte on the negative electrode surface It serves as a protective film.
  • the SEI film produced only by the organic solvent and the lithium salt is somewhat insufficient to serve as a continuous protective film, so that the charging and discharging of the battery is continuously progressed or increased electrochemical energy, especially at high temperature storage in a full charge state. It can be disintegrated slowly by heat energy. Due to the collapse of the SEI film, side reactions in which the exposed surface of the negative electrode active material and the electrolyte solvent react to decompose continuously occur, which may cause an increase in resistance of the negative electrode.
  • the interfacial resistance between the electrode and the electrolyte may be increased by various causes, and if the interfacial resistance is increased in this way, the overall performance of the battery, such as charge and discharge efficiency and lifespan characteristics, may occur.
  • Patent Document 1 Japanese Patent Laid-Open No. 5-13088 describes a method of improving the resistance of a lithium secondary battery by containing vinylene carbonate (VC) in an electrolyte solution.
  • VC vinylene carbonate
  • Patent Document 2 Domestic Patent Publication No. 2012-0011209 discloses an electrolyte solution for a lithium secondary battery containing an alkylene sulfate having a specific structure, an ammonium compound having a specific structure, and a vinylene carbonate. According to this method, since the SEI film produced by the sulfate-based compound has the advantage of low resistance, the low-temperature output characteristics of the battery can be improved, but there is no remarkable improvement in terms of charge / discharge efficiency and lifetime characteristics of the battery. Further improvements are needed.
  • Patent Document 1 Japanese Patent Application Laid-open No. Hei 5-13088
  • Patent Document 2 KR2012-0011209 A
  • Another object of the present invention is to provide a lithium secondary battery including the electrolyte.
  • the electrolytic solution is phosphate (hexafluorophosphate) anion (PF 6 -) hexafluoropropane and borate (tetrafluoroborate) anion tetrafluoroborate (BF 4 It provides a lithium secondary battery electrolyte characterized in that it further comprises a solid salt having one anion selected from-) and a phosphonium-based cation represented by the formula (1).
  • R 1 to R 4 are each independently hydrogen, halogen or an alkyl group having 1 to 8 carbon atoms.
  • the content of the solid salt may be 0.01 to 5 parts by weight based on 100 parts by weight of the total of the lithium salt and the organic solvent.
  • the solid salt may be phosphonium hexafluorophosphate, tetramethylphosphonium hexafluorophosphate, tetraethylphosphonium hexafluorophosphate, tetrapropylphosphonium, or tetrapropylphosphonium.
  • Tetrapropylphosphonium hexafluorophosphate Tetrabutylphosphonium hexafluorophosphate, Tetrahexylphosphonium hexafluorophosphate, Tetraheptyl phosphate tetrahexyl phosphate ), Ethyltrimethylphosphonium hexafluorophosphate, Triethylmethylphosphonium hexafluorophospate (Triethylmethylphosphonium hexafluorophosp) hate), Butyltrimethylphosphonium hexafluorophosphate, Diethyldimethylphosphonium hexafluorophosphate, Dibutyldimethylphosphonium hexafluorophosphate, Dibutyldimethylphosphonium hexafluorophosphate Tetrafluoroborate, tetramethylphosphonium tetrafluoroborate, tetraethylphosphonium tetra
  • the present invention provides a lithium secondary battery including the electrolyte.
  • an electrolyte solution for a lithium secondary battery comprising a solid salt having an anion selected from hexafluorophosphate anion (PF 6 ⁇ ) and tetrafluoroborate anion (BF 4 ⁇ ) and a phosphonium-based cation as an additive
  • Example 1 is a graph showing the discharge capacity retention ratio of lithium secondary batteries manufactured using the electrolyte solutions of Examples 1 to 3 and Comparative Example 1 according to the present invention.
  • the present invention relates to a lithium secondary battery, the electrolyte comprising a lithium salt and an organic solvent, the electrolytic solution hexafluorophosphate (hexafluorophosphate) anion (PF 6 -) and tetrafluoroborate (tetrafluoroborate) anion (BF 4 -) in the selection It relates to a lithium secondary battery electrolyte characterized by further comprising a solid salt having one anion and a phosphonium cation represented by the following formula (1).
  • R 1 to R 4 are each independently hydrogen, halogen, or an alkyl group having 1 to 8 carbon atoms.
  • the performance of the battery depends largely on the basic electrolyte composition and the solid electrolyte interface (SEI) film formed by the reaction between the electrolyte and the electrode.
  • SEI solid electrolyte interface
  • the SEI film refers to a film formed at an interface of an anode by reacting with an anode when lithium ions deintercalated from an anode are moved and intercalated into an anode during initial charging of a lithium secondary battery.
  • the SEI film prevents organic solvents of a large molecular weight electrolyte which move together by selectively passing only lithium ions to intercalate with the carbon anode to prevent the structure of the cathode from being collapsed. Avoid side reactions between different substances.
  • SEI membranes formed by conventional carbonate organic solvents, fluorine salts or other inorganic salts are weak, porous and not dense, and thus have not played such roles.
  • the solid salt included as an additive in the electrolyte of the present invention has a lower reduction potential than that of the carbonate-based electrolyte solvent, it is reduced on the surface of the negative electrode material prior to the electrolyte solvent during initial charging of the battery, thereby making it firm and dense.
  • the SEI film is formed. Therefore, it is possible to prevent side reactions in which the electrolyte solvent is co-intercalated into the negative electrode active material layer or decomposed at the negative electrode surface, thereby improving charge and discharge efficiency of the battery.
  • the formed SEI film is a passivation layer having low chemical reactivity, it exhibits high stability even in a long cycle and can achieve long life characteristics.
  • the content of the solid salt is preferably 0.01 to 5.0 parts by weight, more preferably 0.1 to 3.0 parts by weight based on 100 parts by weight of the total of the lithium salt and the organic solvent. If the content is less than 0.01 parts by weight, it may be difficult to obtain the effect of forming an excellent stability SEI film, whereas if it exceeds 5.0 parts by weight may result in a decrease in charge and discharge efficiency.
  • Preferred examples of the solid salt according to the present invention include phosphonium hexafluorophosphate, tetramethylphosphonium hexafluorophosphate, tetraethylphosphonium hexafluorophosphate, tetraethylphosphonium hexafluorophosphate, and tetramethylphosphonium hexafluorophosphate.
  • Tetrapropylphosphonium hexafluorophosphate Tetrabutylphosphonium hexafluorophosphate, Tetrahexylphosphonium hexafluorophosphate, Tetraheptyl phosphofluorophosphate Tetraheptylphosphonium hexafluorophosphate, Ethyltrimethylphosphonium hexafluorophosphate, Triethylmethylphosphonium hexafluorophosphate hylmethylphosphonium hexafluorophosphate, Butyltrimethylphosphonium hexafluorophosphate, Diethyldimethylphosphonium hexafluorophosphate, Dibutyldimethylphosphonium hexafluorophosphate, Difluorobutylphosphonate Phosphonium tetrafluoroborate, tetramethylphosphonium tetrafluoroborate, tetraethylphosphonium tetra
  • the lithium salt contained in the electrolyte of the present invention may be used in the concentration range of 0.6M to 2.0M, more preferably may be used in the range of 0.7M to 1.6M. If the concentration of the lithium salt is less than 0.6M, the conductivity of the electrolyte may be lowered and the performance of the electrolyte may decrease. On the other hand, when the concentration of the lithium salt exceeds 2.0M, the viscosity of the electrolyte may increase, thereby reducing the mobility of lithium ions.
  • the lithium salt those conventionally used in an electrolyte for a lithium secondary battery may be used without limitation.
  • the anion of the lithium salt may be F ⁇ , Cl ⁇ , Br ⁇ , I ⁇ , NO 3 ⁇ , N (CN) 2 -, BF 4 -, ClO 4 -, PF 6 -, (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 -, 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 -, (SF 5) 3 C -, (CF 3 SO 2) 3 C -, CF 3 (CF 2) 7 SO 3 -, CF 3 CO 2 -, CH 3 CO 2 - , SCN - and (CF 3 CF 2 SO 2 ) 2 N -It can be any one selected from
  • organic solvent included in the electrolyte solution those conventionally used in the lithium secondary battery electrolyte may be used without limitation, and for example, ethers, esters, amides, linear carbonates, and cyclic carbonates may be used alone or by mixing two or more kinds. Can be used.
  • carbonate compounds which are typically cyclic carbonates, linear carbonates, or mixtures thereof may be included.
  • cyclic carbonate compound 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 mixtures of two or more thereof.
  • linear carbonate compound examples include dimethyl carbonate (dimethyl carbonate, DMC), diethyl carbonate (diethyl carbonate, DEC), dipropyl carbonate, ethyl methyl carbonate (EMC), methyl propyl carbonate and ethyl propyl carbonate Any one selected or a mixture of two or more thereof may be representatively used, but is not limited thereto.
  • ethylene carbonate and propylene carbonate which are cyclic carbonates among the carbonate-based organic solvents, are highly viscous organic solvents, and thus may be preferably used because they dissociate lithium salts in the electrolyte well, such as dimethyl carbonate and diethyl carbonate.
  • an electrolyte having high electrical conductivity can be made, and thus it can be used more preferably.
  • 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.
  • esters in the organic solvent include methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ Any one or a mixture of two or more selected from the group consisting of -valerolactone and ⁇ -caprolactone may be used, but is not limited thereto.
  • the electrolyte solution for a lithium secondary battery of the present invention may further include a conventionally known additive for forming an SEI film without departing from the object of the present invention.
  • a conventionally known additive for forming an SEI film for forming an SEI film
  • vinylene carbonate, vinylethylene carbonate, fluoroethylene carbonate, cyclic sulfite, saturated sultone, unsaturated sultone, acyclic sulfone, etc. may be used alone or in combination of two or more thereof. It may be, but is not limited thereto.
  • the cyclic sulfites include ethylene sulfite, methyl ethylene sulfite, ethyl ethylene sulfite, 4,5-dimethyl ethylene sulfite, 4,5-diethyl ethylene sulfite, propylene sulfite, 4,5-dimethyl propylene sulfide Pite, 4,5-diethyl propylene sulfite, 4,6-dimethyl propylene sulfite, 4,6-diethyl propylene sulfite, 1,3-butylene glycol sulfite, and the like.
  • 1,3-propane sultone, 1,4-butane sultone, and the like examples of the unsaturated sultone include ethene sultone, 1,3-propene sultone, 1,4-butene sultone, 1-methyl-1,3-prop Pen sulfone etc. are mentioned, As acyclic sulfone, divinyl sulfone, dimethyl sulfone, diethyl sulfone, methyl ethyl sulfone, methyl vinyl sulfone, etc. are mentioned.
  • the additive for forming the SEI film may be included in an appropriate amount according to the specific type of the additive, for example, 0.01 to 10 parts by weight based on 100 parts by weight of the electrolyte.
  • the present invention provides a lithium secondary battery comprising the electrolyte.
  • the lithium secondary battery is prepared by injecting an electrolyte prepared according to the present invention in an electrode structure consisting of a positive electrode, a negative electrode and a separator interposed between the positive electrode and the negative electrode.
  • the positive electrode and the negative electrode may be prepared by mixing an active material, a binder, and a conductive agent with a solvent to prepare a slurry, applying the slurry to a current collector such as aluminum, and drying and compressing the slurry.
  • a lithium-containing transition metal oxide may be preferably used as the cathode active material.
  • a carbon material lithium metal, silicon, tin, or the like, which can normally occlude and release lithium ions, may be used, and a metal oxide such as TiO 2 and SnO 2 having a potential of less than 2 V 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, artificial graphite, Kishgraphite, pyrolytic carbon, liquid crystal pitch system.
  • High-temperature calcined carbon such as mesophase pitch based carbon fiber, meso-carbon microbeads, mesophase pitches and petroleum or coal tar pitch derived cokes are typical.
  • the binder binds the active material and the conductive agent to fix the current collector, and polyvinylidene fluoride, polypropylene, carboxymethyl cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polyvinyl alcohol, styrene butadiene Those commonly used in lithium ion secondary batteries, such as rubber, can be used.
  • Examples of the conductive agent include artificial graphite, natural graphite, acetylene black, ketjen black, channel black, lamp black, thermal black, conductive fibers such as carbon fibers and metal fibers, conductive metal oxides such as titanium oxide, metal powders such as aluminum and nickel, and the like. This can be used.
  • a single olefin or a complex of olefins such as polyethylene (PE) and polypropylene (PP), polyamide (PA), polyacrylonitrile (PAN), polyethylene oxide (PEO), and polypropylene oxide (PPO) , Polyethylene glycol diacrylate (PEGA), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), polyvinyl chloride (PVC) and the like can be used.
  • PE polyethylene
  • PP polypropylene
  • PA polyamide
  • PAN polyacrylonitrile
  • PEO polyethylene oxide
  • PPO polypropylene oxide
  • PEGA Polyethylene glycol diacrylate
  • PTFE polytetrafluoroethylene
  • PVdF polyvinylidene fluoride
  • PVC polyvinyl chloride
  • 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.
  • Ethylene carbonate, ethylmethyl carbonate, and dimethyl carbonate were mixed in a volume ratio of 2: 4: 4 to prepare an organic solvent.
  • LiPF 6 as a lithium salt was dissolved in the organic solvent to prepare a LiPF 6 mixed solution having a lithium salt concentration of 1.15M.
  • tetraethylphosphonium tetrafluoroborate as a solid salt was added to the mixed solution at 0.5 parts by weight based on 100 parts by weight of the mixed solution to prepare an electrolyte solution.
  • Example 1 tetrabutylphosphonium tetrafluoroborate was used instead of tetraethylphosphonium tetrafluoroborate as a solid salt, and the rest of the electrolyte was prepared in the same manner.
  • Example 1 instead of tetraethylphosphonium tetrafluoroborate, tetraethylphosphonium hexafluorophosphate was used as a solid salt, and the rest of the electrolyte was prepared in the same manner.
  • Example 1 Without adding a solid salt in Example 1, the rest was prepared in the same manner.
  • LiNi 0 as the positive electrode active material . 5 Co 0 . 2 Mn 0 . 3 O 2, the carbon black, polyvinylidene fluoride (PVdF) as a binder and a conductive material 91.5: 4.4: 4.1 were dispersed in and mixed with a weight ratio of, N- methyl-2-pyrrolidone to prepare a positive electrode slurry After coating the slurry on an aluminum current collector, it was dried and rolled to prepare a positive electrode. In addition, a graphite electrode was used as the cathode.
  • a porous polyethylene membrane manufactured by Tonen was used as a separator together with the prepared anode and cathode, and the coin cell was prepared by pouring the prepared electrolyte solution.
  • a lithium secondary battery charger and battery (Toyo-System Co., LTD, TOSCAT-3600) was used, and the conditions were constant current to 4.3 V at 0.1 C to 0.05 V and 0.05.
  • the cell formation process was completed by charging C under constant voltage condition with the termination current and discharging under constant current condition up to 3.0V at 0.1C.
  • the charge-discharge capacity of the first cycle was measured by charging the completed cell under constant current conditions up to 4.3 V at 0.5 C and constant voltage conditions under 0.05 C as end current, and discharging under constant current conditions up to 3.0 V at 0.5 C. Charge and discharge tests under these conditions were repeated 50 times. Charge and discharge efficiency and capacity retention rate in each cycle are shown in Table 1 calculated according to the following equation.
  • Charge / discharge efficiency (%) discharge capacity / charge capacity ⁇ 100
  • Capacity retention rate [%] (discharge capacity at 50 st cycles / discharge capacity at 1 st cycles)
  • the coin cells manufactured using the electrolyte solutions of Examples 1 to 3 according to the present invention were similar in terms of charge and discharge efficiency compared to the coin cells manufactured using the electrolyte solution of Comparative Example 1. Indicating the level, it can be seen that the discharge capacity retention rate was improved at 50 cycles.

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Abstract

La présente invention concerne un électrolyte pour batterie rechargeable au lithium et une batterie rechargeable au lithium le comprenant, l'électrolyte contenant un sel de lithium et un solvant organique, et l'électrolyte comprenant en outre un sel solide contenant un anion choisi parmi un anion hexafluorophosphate (PF6 -) et un anion tétrafluoroborate (BF4 -) et un cation à base de phosphonium. Selon la présente invention, une batterie rechargeable au lithium présentant des caractéristiques de durée de vie à haute température améliorées peut être produite par utilisation de l'électrolyte contenant les additifs.
PCT/KR2015/006688 2014-12-22 2015-06-30 Électrolyte pour batterie rechargeable au lithium et batterie rechargeable au lithium le comprenant WO2016104896A1 (fr)

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KR20090052870A (ko) * 2006-09-12 2009-05-26 니폰 가가쿠 고교 가부시키가이샤 전해질, 그것을 함유하는 리튬 이온 이차 전지용 전해액 및이것을 사용한 리튬 이온 이차 전지
KR20110025661A (ko) * 2008-05-29 2011-03-10 레이덴 에너지 인코오포레이티드 이온 용액 전해질을 포함하는 전기화학 전지
KR20110038037A (ko) * 2008-07-11 2011-04-13 꼼미사리아 아 레네르지 아또미끄 에 오 에네르지 알떼르나띠브스 음이온성 계면활성제를 포함하는 이온성 액체 전해질 및 이를 포함하는 축전지와 같은 전기화학 장치
KR20140046611A (ko) * 2012-10-08 2014-04-21 한양대학교 산학협력단 이온성 액체 고분자 전해질용 조성물, 이에 의해 제조된 이온성 액체 고분자 전해질 및 이를 포함하는 리튬이차전지

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