KR102614016B1 - 리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지 - Google Patents
리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지 Download PDFInfo
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- KR102614016B1 KR102614016B1 KR1020200045394A KR20200045394A KR102614016B1 KR 102614016 B1 KR102614016 B1 KR 102614016B1 KR 1020200045394 A KR1020200045394 A KR 1020200045394A KR 20200045394 A KR20200045394 A KR 20200045394A KR 102614016 B1 KR102614016 B1 KR 102614016B1
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 74
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000003792 electrolyte Substances 0.000 title claims abstract description 46
- 150000001875 compounds Chemical class 0.000 claims abstract description 32
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 11
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 11
- 239000011356 non-aqueous organic solvent Substances 0.000 claims abstract description 10
- 239000007773 negative electrode material Substances 0.000 claims description 33
- 239000000654 additive Substances 0.000 claims description 29
- 239000007774 positive electrode material Substances 0.000 claims description 29
- 230000000996 additive effect Effects 0.000 claims description 21
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 8
- ZBKFYXZXZJPWNQ-UHFFFAOYSA-N isothiocyanate group Chemical group [N-]=C=S ZBKFYXZXZJPWNQ-UHFFFAOYSA-N 0.000 claims description 8
- 229910000314 transition metal oxide Inorganic materials 0.000 claims description 8
- 239000011871 silicon-based negative electrode active material Substances 0.000 claims description 7
- RSNHXDVSISOZOB-UHFFFAOYSA-N lithium nickel Chemical compound [Li].[Ni] RSNHXDVSISOZOB-UHFFFAOYSA-N 0.000 claims description 5
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 claims description 3
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 claims description 3
- NDPGDHBNXZOBJS-UHFFFAOYSA-N aluminum lithium cobalt(2+) nickel(2+) oxygen(2-) Chemical compound [Li+].[O--].[O--].[O--].[O--].[Al+3].[Co++].[Ni++] NDPGDHBNXZOBJS-UHFFFAOYSA-N 0.000 claims description 3
- LRVBJNJRKRPPCI-UHFFFAOYSA-K lithium;nickel(2+);phosphate Chemical compound [Li+].[Ni+2].[O-]P([O-])([O-])=O LRVBJNJRKRPPCI-UHFFFAOYSA-K 0.000 claims description 3
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000002000 Electrolyte additive Substances 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 25
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- XYFCBTPGUUZFHI-UHFFFAOYSA-N phosphine group Chemical group P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 4
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- 229910052761 rare earth metal Inorganic materials 0.000 description 4
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- 229910013716 LiNi Inorganic materials 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- XLJMAIOERFSOGZ-UHFFFAOYSA-M cyanate group Chemical group [O-]C#N XLJMAIOERFSOGZ-UHFFFAOYSA-M 0.000 description 3
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 3
- 125000005843 halogen group Chemical group 0.000 description 3
- 125000002462 isocyano group Chemical group *[N+]#[C-] 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 3
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- 229910052708 sodium Inorganic materials 0.000 description 3
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- ZMZDMBWJUHKJPS-UHFFFAOYSA-M thiocyanate group Chemical group [S-]C#N ZMZDMBWJUHKJPS-UHFFFAOYSA-M 0.000 description 3
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Classifications
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- 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
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- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- 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
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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
- H01M10/056—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
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
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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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/387—Tin or alloys based on tin
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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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- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/58—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
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Abstract
[화학식 1]
상기 화학식 1의 정의는 명세서 내에 기재한 바와 같다.
Description
방전용량 (mAh) | |
실시예 1 | 2,462 |
실시예 2 | 2,458 |
비교예 1 | 2,454 |
방전용량 (mAh) | |
실시예 4 | 2,218 |
비교예 2 | 2,214 |
초기 DC-IR (mOhm) | |
실시예 1 | 21.11 |
실시예 2 | 21.38 |
비교예 1 | 21.58 |
초기 DC-IR (mOhm) | 30일 방치한 이후의 DC-IR (mOhm) | ΔDC-IR (%) | |
실시예 1 | 21.11 | 27.95 | 32.4 |
실시예 2 | 21.38 | 28.10 | 31.4 |
실시예 3 | 22.41 | 29.48 | 31.5 |
비교예 1 | 21.58 | 31.09 | 44.1 |
112: 음극
113: 세퍼레이터
114: 양극
120: 전지 용기
140: 봉입 부재
Claims (9)
- 비수성 유기 용매, 리튬염, 및 첨가제를 포함하고,
상기 첨가제는 하기 화학식 1로 표시되는 화합물을 포함하는,
리튬 이차 전지용 전해질:
[화학식 1]
상기 화학식 1에서,
L1은 단일결합이고,
Z는 이소시아네이트기(-NCO) 또는 이소티오시아네이트기(-NCS)이며,
R1 및 R2는 각각 독립적으로 -F이다.
- 삭제
- 삭제
- 제1항에서,
상기 첨가제는 하기 화학식 2로 표시되는 화합물을 포함하는 것인 리튬 이차 전지용 전해질:
[화학식 2]
- 제1항에서,
상기 첨가제는 전해질 총 중량에 대하여 0.05 중량% 내지 5 중량% 포함되는 리튬 이차 전지용 전해질.
- 제1항에서,
상기 첨가제는 전해질 총 중량에 대하여 0.1 중량% 내지 3 중량% 포함되는 리튬 이차 전지용 전해질.
- 양극 활물질을 포함하는 양극;
음극 활물질을 포함하는 음극; 및
상기 제1항 및 제4항 내지 제6항 중 어느 한 항에 따른 리튬 이차 전지용 전해질을 포함하는 리튬 이차 전지.
- 제7항에서,
상기 양극 활물질은 리튬 니켈 산화물, 리튬 니켈 코발트 망간 산화물, 리튬 니켈 코발트 알루미늄 산화물, 리튬 니켈 인산화물 및 이들의 조합에서 선택되는 리튬 니켈계 전이금속 산화물을 포함하는 리튬 이차 전지.
- 제7항에서,
상기 음극 활물질은 Si계 음극 활물질 또는 Sn계 음극 활물질을 포함하는 리튬 이차 전지.
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KR1020200045394A KR102614016B1 (ko) | 2020-04-14 | 2020-04-14 | 리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지 |
JP2022562357A JP7469511B2 (ja) | 2020-04-14 | 2021-03-02 | リチウム二次電池用電解質およびこれを含むリチウム二次電池 |
PCT/KR2021/002540 WO2021210775A1 (ko) | 2020-04-14 | 2021-03-02 | 리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지 |
US17/995,476 US20230178805A1 (en) | 2020-04-14 | 2021-03-02 | Electrolyte for rechargeable lithium battery and rechargeable lithium battery comprising same |
EP21788862.7A EP4138168A4 (en) | 2020-04-14 | 2021-03-02 | ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY WITH IT |
CN202180027627.4A CN115398698A (zh) | 2020-04-14 | 2021-03-02 | 用于锂二次电池的电解质及包括其的锂二次电池 |
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