KR20080069930A - 안전성이 향상된 이차 전지 - Google Patents
안전성이 향상된 이차 전지 Download PDFInfo
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- KR20080069930A KR20080069930A KR1020080007655A KR20080007655A KR20080069930A KR 20080069930 A KR20080069930 A KR 20080069930A KR 1020080007655 A KR1020080007655 A KR 1020080007655A KR 20080007655 A KR20080007655 A KR 20080007655A KR 20080069930 A KR20080069930 A KR 20080069930A
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- lithium
- metal composite
- composite oxide
- containing metal
- positive electrode
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- 229910052744 lithium Inorganic materials 0.000 claims abstract description 174
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 127
- 239000002905 metal composite material Substances 0.000 claims abstract description 117
- 239000002245 particle Substances 0.000 claims description 34
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 22
- 229910001416 lithium ion Inorganic materials 0.000 claims description 22
- 229910015118 LiMO Inorganic materials 0.000 claims description 8
- 239000003792 electrolyte Substances 0.000 claims description 5
- 239000003575 carbonaceous material Substances 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims description 3
- 150000004696 coordination complex Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910002521 CoMn Inorganic materials 0.000 claims description 2
- 229910015177 Ni1/3Co1/3Mn1/3 Inorganic materials 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 239000006182 cathode active material Substances 0.000 abstract description 12
- 239000007774 positive electrode material Substances 0.000 description 22
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 21
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 15
- 230000008859 change Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 229910004499 Li(Ni1/3Mn1/3Co1/3)O2 Inorganic materials 0.000 description 6
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 6
- 230000020169 heat generation Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000000157 electrochemical-induced impedance spectroscopy Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000006257 cathode slurry Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000006258 conductive agent Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910016222 LiNi0.9Co0.1O2 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000011267 electrode slurry Substances 0.000 description 1
- 239000008151 electrolyte solution Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000010406 interfacial reaction Methods 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
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- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
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- 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
-
- 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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- 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
- H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
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- 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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- 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
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Abstract
Description
0.3m/min | 1m/min | 3m/min | |
실시예1 | Pass (0/3) | Pass (0/3) | Pass (0/3) |
실시예2 | Pass (0/3) | Pass (0/3) | Pass (0/3) |
실시예3 | Pass (0/3) | Pass (0/3) | Pass (0/3) |
실시예4 | Pass (0/3) | Pass (0/3) | Pass (0/3) |
실시예5 | Pass (0/3) | Pass (0/3) | Pass (0/3) |
실시예6 | Pass (0/3) | Pass (0/3) | Pass (0/3) |
비교예1 | Fail (3/3) | Fail (3/3) | Fail (3/3) |
비교예2 | Fail (3/3) | Fail (3/3) | Fail (3/3) |
비교예3 | Fail (3/3) | Fail (3/3) | Fail (3/3) |
Claims (15)
- 리튬 대비 전위(Li/Li+) 및 저항이 서로 상이한 2종 이상의 리튬 함유 금속 복합산화물을 포함하는 양극으로서, 상기 양극은(a) 제 1 리튬 함유 금속 복합산화물; 및(b) 상기 제 1 리튬 함유 금속 복합산화물 보다 저항이 높고, 리튬 대비 전위(Li/Li+)가 낮은 제 2 리튬 함유 금속 복합산화물을 포함하는 것이 특징인 양극.
- 제 1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물의 리튬 대비 전위(Li/Li+)는 3.7V 이상이며, 제2 리튬 함유 금속 복합산화물의 리튬 대비 전위는 3.7V 미만인 것이 특징인 양극.
- 제1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물과 제 2 리튬 함유 금속 복합산화물의 리튬 대비 전위(Li/Li+, △P) 차는 0.3V < △P < 5V인 것이 특징인 양극.
- 제 1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물와 제 2 리튬 함유 금속 복합산화물의 전기 전도도 비율은 10-1 ~ 10-7 범위인 것이 특징인 양극.
- 제 1항에 있어서, 상기 제 2 리튬 함유 금속 복합산화물은 표면의 일부 또는 전부에 전도성 물질로 코팅되어 있는 것이 특징인 양극.
- 제5항에 있어서, 상기 전도성 물질은 탄소재인 양극.
- 제 1항에 있어서, 상기 양극 내 제 1 리튬 함유 금속 복합산화물과 제 2 리튬 함유 금속 복합산화물은 균일하게 혼합되어 있으며, 제 2 리튬 함유 금속 복합산화물 입자가 제 1 리튬 함유 금속 복합산화물 표면을 둘러싸고 있는 형태인 것이 특징인 양극.
- 제 1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물과 제 2 리튬 함유 금속 복합산화물의 중량 비율은 70~95 : 5~30 범위인 양극.
- 제 1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물 입자의 입경은 5 내지 20㎛ 범위이고, 제 2 리튬 함유 금속 복합산화물 입자의 입경은 50nm 내지 10㎛ 범위인 양극.
- 제 1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물 입자의 비표면적은 0.01 내지 0.2m2/g 범위이고, 제 2 리튬 함유 금속 복합산화물 입자의 비표면적은 0.5 내지 30m2/g 범위인 양극.
- 제1항에 있어서, 상기 제 1 리튬 함유 금속 복합산화물은 LiMO2(M = Co, Mn, Ni, Ni1 /3Co1 /3Mn1 /3, Cr, V) 및 LiMO4(M = CoMn, NiV, CoV, CoP, MnP, NiP, Mn2)으로 구성된 군으로부터 선택된 1종 이상이며,제 2 리튬 함유 금속 복합산화물은 LiMO4(M = V2, FeP), LiMO2(M = Mn, Mo, W), LiV6O13, LiTiS2 및 LiWO2으로 구성된 군으로부터 선택된 1종 이상인 양극.
- 양극, 음극, 전해질 및 분리막을 포함하는 이차 전지에 있어서, 상기 양극은 제1항 내지 제11항 중 어느 한 항의 양극인 것이 특징인 이차 전지.
- 제 12항에 있어서, 상기 이차 전지는 5C 이상으로 방전시 음극에서 양극으로 급격하게 전달되는 다량의 리튬 이온과 전자의 이동 속도가 완화되도록 조절되어 발화 발생이 방지되는 것이 특징인 이차 전지.
- 제12항에 있어서, 리튬 이차 전지인 이차 전지.
- (a) 제 1 리튬 함유 금속 복합산화물; 및(b) 상기 제 1 리튬 함유 금속 복합산화물 보다 저항이 높고, 리튬 대비 전위(Li/Li+)가 낮은 제 2 리튬 함유 금속 복합산화물이 혼용(混用)된 양극을 구비함으로써, 내부 단락시 음극에서 양극으로 급격하게 전달되는 다량의 리튬 이온과 전자의 이동 속도가 완화되도록 조절된 리튬 이차 전지의 제조방법.
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Application Number | Priority Date | Filing Date | Title |
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KR20070007406 | 2007-01-24 | ||
KR1020070007406 | 2007-01-24 |
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Publication Number | Publication Date |
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KR20080069930A true KR20080069930A (ko) | 2008-07-29 |
KR100993436B1 KR100993436B1 (ko) | 2010-11-09 |
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KR1020080007655A KR100993436B1 (ko) | 2007-01-24 | 2008-01-24 | 안전성이 향상된 이차 전지 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100112445A1 (ko) |
EP (1) | EP2108202B1 (ko) |
JP (1) | JP5558109B2 (ko) |
KR (1) | KR100993436B1 (ko) |
CN (2) | CN101578724A (ko) |
TW (1) | TW200843163A (ko) |
WO (1) | WO2008091074A1 (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101534896B1 (ko) * | 2010-06-29 | 2015-07-08 | 유미코르 | 2차 전지용 고밀도 및 고전압 안정성 캐소드 물질 |
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2008
- 2008-01-16 CN CNA2008800014384A patent/CN101578724A/zh active Pending
- 2008-01-16 CN CN201410643893.1A patent/CN104466084B/zh active Active
- 2008-01-16 WO PCT/KR2008/000275 patent/WO2008091074A1/en active Application Filing
- 2008-01-16 EP EP08704811.2A patent/EP2108202B1/en active Active
- 2008-01-16 JP JP2009547163A patent/JP5558109B2/ja active Active
- 2008-01-16 US US12/524,397 patent/US20100112445A1/en not_active Abandoned
- 2008-01-24 TW TW097102646A patent/TW200843163A/zh unknown
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Cited By (2)
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KR101534896B1 (ko) * | 2010-06-29 | 2015-07-08 | 유미코르 | 2차 전지용 고밀도 및 고전압 안정성 캐소드 물질 |
KR20170095907A (ko) * | 2014-12-18 | 2017-08-23 | 다우 글로벌 테크놀로지스 엘엘씨 | 개선된 열안정성을 갖는 리튬 이온 배터리 |
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TW200843163A (en) | 2008-11-01 |
JP2010517238A (ja) | 2010-05-20 |
EP2108202B1 (en) | 2017-03-08 |
KR100993436B1 (ko) | 2010-11-09 |
EP2108202A1 (en) | 2009-10-14 |
CN101578724A (zh) | 2009-11-11 |
CN104466084A (zh) | 2015-03-25 |
EP2108202A4 (en) | 2011-08-10 |
JP5558109B2 (ja) | 2014-07-23 |
US20100112445A1 (en) | 2010-05-06 |
WO2008091074A1 (en) | 2008-07-31 |
CN104466084B (zh) | 2017-09-15 |
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