WO2023140502A1 - 수명 성능이 개선된 리튬-황 전지 - Google Patents
수명 성능이 개선된 리튬-황 전지 Download PDFInfo
- Publication number
- WO2023140502A1 WO2023140502A1 PCT/KR2022/020000 KR2022020000W WO2023140502A1 WO 2023140502 A1 WO2023140502 A1 WO 2023140502A1 KR 2022020000 W KR2022020000 W KR 2022020000W WO 2023140502 A1 WO2023140502 A1 WO 2023140502A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lithium
- ether
- sulfur
- solvent
- sulfur battery
- Prior art date
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- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000002904 solvent Substances 0.000 claims abstract description 65
- 239000003792 electrolyte Substances 0.000 claims abstract description 54
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 37
- -1 ether compound Chemical class 0.000 claims abstract description 35
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 35
- 239000011593 sulfur Substances 0.000 claims abstract description 35
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 30
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 30
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims abstract description 26
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 18
- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000011737 fluorine Substances 0.000 claims abstract description 16
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 15
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- 150000002825 nitriles Chemical class 0.000 claims abstract description 8
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- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical compound [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 claims description 7
- HCBRSIIGBBDDCD-UHFFFAOYSA-N 1,1,2,2-tetrafluoro-3-(1,1,2,2-tetrafluoroethoxy)propane Chemical compound FC(F)C(F)(F)COC(F)(F)C(F)F HCBRSIIGBBDDCD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims description 4
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 claims description 4
- JOROOXPAFHWVRW-UHFFFAOYSA-N 1,1,1,2,3,3-hexafluoro-3-(2,2,3,3,3-pentafluoropropoxy)propane Chemical compound FC(F)(F)C(F)C(F)(F)OCC(F)(F)C(F)(F)F JOROOXPAFHWVRW-UHFFFAOYSA-N 0.000 claims description 2
- DOESGSGKEZIPFW-UHFFFAOYSA-N 1,1,1,2,3,3-hexafluoro-3-(2,2,3,3-tetrafluoropropoxy)propane Chemical compound FC(F)C(F)(F)COC(F)(F)C(F)C(F)(F)F DOESGSGKEZIPFW-UHFFFAOYSA-N 0.000 claims description 2
- DMECHFLLAQSVAD-UHFFFAOYSA-N 1-ethoxy-1,1,2,3,3,3-hexafluoropropane Chemical compound CCOC(F)(F)C(F)C(F)(F)F DMECHFLLAQSVAD-UHFFFAOYSA-N 0.000 claims description 2
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 claims description 2
- CNJRPYFBORAQAU-UHFFFAOYSA-N 1-ethoxy-2-(2-methoxyethoxy)ethane Chemical compound CCOCCOCCOC CNJRPYFBORAQAU-UHFFFAOYSA-N 0.000 claims description 2
- KIAMPLQEZAMORJ-UHFFFAOYSA-N 1-ethoxy-2-[2-(2-ethoxyethoxy)ethoxy]ethane Chemical compound CCOCCOCCOCCOCC KIAMPLQEZAMORJ-UHFFFAOYSA-N 0.000 claims description 2
- CAQYAZNFWDDMIT-UHFFFAOYSA-N 1-ethoxy-2-methoxyethane Chemical compound CCOCCOC CAQYAZNFWDDMIT-UHFFFAOYSA-N 0.000 claims description 2
- AIPBKZUVKDTCOC-UHFFFAOYSA-N 2-(1,1,2,2-tetrafluoroethoxy)propane Chemical compound CC(C)OC(F)(F)C(F)F AIPBKZUVKDTCOC-UHFFFAOYSA-N 0.000 claims description 2
- FETMDPWILVCFLL-UHFFFAOYSA-N 2-[2-(2-propan-2-yloxyethoxy)ethoxy]ethanol Chemical compound CC(C)OCCOCCOCCO FETMDPWILVCFLL-UHFFFAOYSA-N 0.000 claims description 2
- JECPJHZWLKEQFB-UHFFFAOYSA-N 2-[2-[2-(2-propan-2-yloxyethoxy)ethoxy]ethoxy]ethanol Chemical compound CC(C)OCCOCCOCCOCCO JECPJHZWLKEQFB-UHFFFAOYSA-N 0.000 claims description 2
- OBAYXRZHJPDDHB-UHFFFAOYSA-N 2-methyl-1-(1,1,2,2-tetrafluoroethoxy)propane Chemical compound CC(C)COC(F)(F)C(F)F OBAYXRZHJPDDHB-UHFFFAOYSA-N 0.000 claims description 2
- HYDWALOBQJFOMS-UHFFFAOYSA-N 3,6,9,12,15-pentaoxaheptadecane Chemical compound CCOCCOCCOCCOCCOCC HYDWALOBQJFOMS-UHFFFAOYSA-N 0.000 claims description 2
- XOBKSJJDNFUZPF-UHFFFAOYSA-N Methoxyethane Chemical compound CCOC XOBKSJJDNFUZPF-UHFFFAOYSA-N 0.000 claims description 2
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- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims description 2
- SGAMQLNREKTWEK-UHFFFAOYSA-N fluoro(fluoromethoxy)methane Chemical compound FCOCF SGAMQLNREKTWEK-UHFFFAOYSA-N 0.000 claims description 2
- KGPPDNUWZNWPSI-UHFFFAOYSA-N flurotyl Chemical compound FC(F)(F)COCC(F)(F)F KGPPDNUWZNWPSI-UHFFFAOYSA-N 0.000 claims description 2
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- YFNKIDBQEZZDLK-UHFFFAOYSA-N triglyme Chemical compound COCCOCCOCCOC YFNKIDBQEZZDLK-UHFFFAOYSA-N 0.000 claims description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims 2
- DEYAWNMYIUDQER-UHFFFAOYSA-N 1-(1,1,2,2-tetrafluoroethoxy)propane Chemical compound CCCOC(F)(F)C(F)F DEYAWNMYIUDQER-UHFFFAOYSA-N 0.000 claims 1
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- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 229910001537 lithium tetrachloroaluminate Inorganic materials 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- HSFDLPWPRRSVSM-UHFFFAOYSA-M lithium;2,2,2-trifluoroacetate Chemical compound [Li+].[O-]C(=O)C(F)(F)F HSFDLPWPRRSVSM-UHFFFAOYSA-M 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001483 poly(ethyl methacrylate) polymer Polymers 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 229920000131 polyvinylidene Polymers 0.000 description 1
- 229920002717 polyvinylpyridine Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920005608 sulfonated EPDM Polymers 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 235000015041 whisky Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Classifications
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- 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
- H01M10/052—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
- H01M10/0568—Liquid materials characterised by the solutes
-
- 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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- 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
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/381—Alkaline or alkaline earth metals elements
- H01M4/382—Lithium
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0034—Fluorinated solvents
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- H—ELECTRICITY
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- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0037—Mixture of solvents
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- 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-sulfur battery with excellent lifespan performance, and more particularly, to a lithium-sulfur battery with improved lifespan performance that can utilize more than 80% of the theoretical discharge capacity (1,675 mAh/g) of sulfur and enable long lifespan operation by using a sparingly solvating electrolyte (SSE) electrolyte system (discharge capacity ⁇ 1,600 mAh/gs) excluding nitrile solvents and applying a carbon material with a high specific surface area to the cathode.
- SSE sparingly solvating electrolyte
- the 'sulfur utilization rate' is specifically the ratio of the discharge capacity (mAh) per weight (gram) of the sulfur element contained in the positive electrode of the battery to the theoretical capacity per weight of sulfur of 1,675 mAh / g (sulfur).
- the negative electrode is a lithium-based metal, and may further include a current collector on one side of the lithium-based metal.
- An anode current collector may be used as the current collector.
- the anode current collector is not particularly limited as long as it does not cause chemical change in the battery and has high conductivity, and may be selected from the group consisting of copper, aluminum, stainless steel, zinc, titanium, silver, palladium, nickel, iron, chromium, alloys thereof, and combinations thereof.
- the stainless steel may be surface-treated with carbon, nickel, titanium, or silver, and an aluminum-cadmium alloy may be used as the alloy, and in addition, calcined carbon, a non-conductive polymer or a conductive polymer surface-treated with a conductive material may be used.
- a thin copper plate is applied as an anode current collector.
- the anode current collector is applied that has a thickness range of 3 to 50 ⁇ m.
- the thickness of the anode current collector is less than 3 ⁇ m, the current collecting effect is deteriorated.
- the thickness exceeds 50 ⁇ m, workability is deteriorated when the cell is assembled by folding.
- the thickness of the separator is not particularly limited, but is preferably in the range of 1 to 100 ⁇ m, and more preferably in the range of 5 to 50 ⁇ m. When the thickness of the separator is less than 1 ⁇ m, mechanical properties cannot be maintained, and when the thickness exceeds 100 ⁇ m, the separator acts as a resistance layer, resulting in deterioration in battery performance.
- the pore size and porosity of the separator are not particularly limited, but preferably have a pore size of 0.1 to 50 ⁇ m and a porosity of 10 to 95%.
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
Description
전해질 내 각 성분별 몰비 | |||
리튬염 | 제2 용매 | 제1 용매 | |
실시예 1 | 1 (1.2M LiBETI) | 2.4 (DME) | 3.6 (TTE) |
실시예 2 | 1 (1.5M LiBETI) | 1.9 (DME) | 3.1 (TTE) |
비교예 1 | 1 (0.5M LiBETI) | 5.8 (DME) | 9.2 (TTE) |
비교예 2 | 1 (0.9M LiBETI) | 3.2 (DME) | 5.1 (TTE) |
비교예 3 | 1 (2.0M LiBETI) | 1.4 (DME) | 2.3 (TTE) |
비교예 4 | 1 (1.5M LiTFSI) | 1.9 (DME) | 3.1 (TTE) |
Claims (13)
- 불소계 에테르 화합물을 포함하는 제1 용매, 글라임계 화합물을 포함하는 제2 용매 및 리튬 비스(펜타플루오로에탄설포닐)이미드를 포함하는 리튬염을 포함하는 전해질; 및황과 탄소재를 활물질로 포함하는 양극;을 포함하는 것인 리튬-황 전지.
- 청구항 1에 있어서, 상기 전해질에 포함된 리튬염, 제2 용매 및 제1 용매의 몰비는 1 : 1.5 ~ 2.7 : 2.8 ~ 5인 것을 특징으로 하는, 리튬-황 전지.
- 청구항 2에 있어서, 상기 리튬염의 농도가 1 M 내지 1.8 M인 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 불소계 에테르 화합물은 1,1,2,2-테트라플루오로에틸 2,2,3,3-테트라플루오로프로필에테르(TTE), 비스(플루오로메틸)에테르, 2-플루오로메틸에테르, 비스(2,2,2-트리플루오로에틸)에테르, 프로필 1,1,2,2-테트라플루오로에틸에테르, 이소프로필 1,1,2,2-테트라플루오로에틸에테르, 1,1,2,2-테트라플루오로에틸이소부틸에테르, 1,1,2,3,3,3-헥사플루오로프로필에틸에테르, 1H,1H,2'H,3H-데카플루오로디프로필에테르 및 1H,1H,2'H-퍼플루오로디프로필에테르로 이루어진 군으로부터 선택되는 1종 이상을 포함하는 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 글라임계 화합물은 디메톡시에탄, 디에톡시에탄, 메톡시에톡시에탄, 디에틸렌글리콜 디메틸에테르, 디에틸렌글리콜 디에틸에테르, 디에틸렌글리콜 메틸에틸에테르, 트리에틸렌글리콜 디메틸에테르, 트리에틸렌글리콜 디에틸에테르, 트리에틸렌글리콜 메틸에틸에테르, 테트라에틸렌글리콜 디메틸에테르, 테트라에틸렌글리콜 디에틸에테르, 테트라에틸렌글리콜 메틸에틸에테르, 폴리에틸렌글리콜 디메틸에테르, 폴리에틸렌글리콜 디에틸에테르 및 폴리에틸렌글리콜 메틸에틸에테르로 이루어진 군으로부터 선택되는 1종 이상을 포함하는 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 전해질이 니트릴계 용매를 포함하지 않는 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 황은 양극 총 중량에 대해 60 내지 80 중량%로 포함되는 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 탄소재의 기공 부피는 0.7 내지 3 cm3/g이고, 비표면적은 1,700 m2/g 이상인 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 양극에 포함되는 양극 활물질은 황-탄소 복합체를 포함하는 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 양극에 포함된 황 이용률이 이론 방전용량의 80 % 이상인 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 리튬-황 전지의 에너지 밀도가 400 Wh/kg 이상 또는 600 Wh/L 이상인 것을 특징으로 하는, 리튬-황 전지.
- 청구항 1에 있어서, 상기 제1 용매는 1,1,2,2-테트라플루오로에틸 2,2,3,3-테트라플루오로프로필에테르(TTE)이고, 상기 제2 용매는 디메톡시에탄(DME)이며, 상기 리튬염은 리튬 비스(펜타플루오로에탄설포닐)이미드(LiBETI)인 것을 특징으로 하는, 리튬-황 전지.
- 청구항 12에 있어서, 상기 리튬염, 제2 용매 및 제1 용매의 몰비는 1 : 1.9 ~ 2.4 : 3.1 ~ 3.6인 것을 특징으로 하는, 리튬-황 전지.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2023561380A JP2024513447A (ja) | 2022-01-18 | 2022-12-09 | 寿命性能が改善されたリチウム‐硫黄電池 |
EP22922359.9A EP4280336A1 (en) | 2022-01-18 | 2022-12-09 | Lithium-sulfur battery with improved lifespan performance |
CN202280015485.4A CN116868412A (zh) | 2022-01-18 | 2022-12-09 | 具有改善的寿命性能的锂硫电池 |
US18/281,768 US20240178438A1 (en) | 2022-01-18 | 2022-12-09 | Lithium-sulfur battery |
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KR1020220007015A KR20230111330A (ko) | 2022-01-18 | 2022-01-18 | 수명 성능이 개선된 리튬-황 전지 |
KR10-2022-0007015 | 2022-01-18 |
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WO2023140502A1 true WO2023140502A1 (ko) | 2023-07-27 |
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US (1) | US20240178438A1 (ko) |
EP (1) | EP4280336A1 (ko) |
JP (1) | JP2024513447A (ko) |
KR (1) | KR20230111330A (ko) |
CN (1) | CN116868412A (ko) |
WO (1) | WO2023140502A1 (ko) |
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KR101962698B1 (ko) * | 2017-10-26 | 2019-03-28 | 한밭대학교 산학협력단 | 리튬황전지용 양극활물질의 제조방법 및 리튬황전지용 양극의 제조방법 |
KR20210065857A (ko) * | 2019-11-27 | 2021-06-04 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지 |
KR20210115319A (ko) * | 2020-03-12 | 2021-09-27 | 주식회사 엘지화학 | 리튬-황 이차전지용 전해액 및 이를 포함하는 리튬-황 이차전지 |
KR20210127329A (ko) * | 2020-04-14 | 2021-10-22 | 주식회사 엘지화학 | 리튬-황 전지용 전해액 및 이를 포함하는 리튬-황 전지 |
KR20220007015A (ko) | 2020-07-09 | 2022-01-18 | 에이에스엠 테크놀러지 싱가포르 피티이 엘티디 | 상호연결 접합부에 시험을 수행하기 위한 장치 및 방법 |
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2022
- 2022-01-18 KR KR1020220007015A patent/KR20230111330A/ko unknown
- 2022-12-09 CN CN202280015485.4A patent/CN116868412A/zh active Pending
- 2022-12-09 EP EP22922359.9A patent/EP4280336A1/en active Pending
- 2022-12-09 US US18/281,768 patent/US20240178438A1/en active Pending
- 2022-12-09 WO PCT/KR2022/020000 patent/WO2023140502A1/ko active Application Filing
- 2022-12-09 JP JP2023561380A patent/JP2024513447A/ja active Pending
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KR101962698B1 (ko) * | 2017-10-26 | 2019-03-28 | 한밭대학교 산학협력단 | 리튬황전지용 양극활물질의 제조방법 및 리튬황전지용 양극의 제조방법 |
KR20210065857A (ko) * | 2019-11-27 | 2021-06-04 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지 |
KR20210115319A (ko) * | 2020-03-12 | 2021-09-27 | 주식회사 엘지화학 | 리튬-황 이차전지용 전해액 및 이를 포함하는 리튬-황 이차전지 |
KR20210127329A (ko) * | 2020-04-14 | 2021-10-22 | 주식회사 엘지화학 | 리튬-황 전지용 전해액 및 이를 포함하는 리튬-황 전지 |
KR20220007015A (ko) | 2020-07-09 | 2022-01-18 | 에이에스엠 테크놀러지 싱가포르 피티이 엘티디 | 상호연결 접합부에 시험을 수행하기 위한 장치 및 방법 |
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Also Published As
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CN116868412A (zh) | 2023-10-10 |
KR20230111330A (ko) | 2023-07-25 |
EP4280336A1 (en) | 2023-11-22 |
US20240178438A1 (en) | 2024-05-30 |
JP2024513447A (ja) | 2024-03-25 |
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