KR102103765B1 - 전해동박 및 이를 이용한 이차전지 - Google Patents
전해동박 및 이를 이용한 이차전지 Download PDFInfo
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- KR102103765B1 KR102103765B1 KR1020180055848A KR20180055848A KR102103765B1 KR 102103765 B1 KR102103765 B1 KR 102103765B1 KR 1020180055848 A KR1020180055848 A KR 1020180055848A KR 20180055848 A KR20180055848 A KR 20180055848A KR 102103765 B1 KR102103765 B1 KR 102103765B1
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- copper foil
- electrolytic copper
- negative electrode
- secondary battery
- active material
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000011889 copper foil Substances 0.000 title claims abstract description 116
- 239000000460 chlorine Substances 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 8
- 239000002356 single layer Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims description 34
- 239000007773 negative electrode material Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 21
- 238000011068 loading method Methods 0.000 claims description 14
- 239000003792 electrolyte Substances 0.000 claims description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 150000002642 lithium compounds Chemical class 0.000 claims description 5
- 239000006182 cathode active material Substances 0.000 claims description 4
- 239000000654 additive Substances 0.000 description 24
- 230000000996 additive effect Effects 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 16
- 230000008569 process Effects 0.000 description 16
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 10
- 239000008151 electrolyte solution Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000007774 positive electrode material Substances 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000005336 cracking Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000012669 compression test Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- FHKPLLOSJHHKNU-INIZCTEOSA-N [(3S)-3-[8-(1-ethyl-5-methylpyrazol-4-yl)-9-methylpurin-6-yl]oxypyrrolidin-1-yl]-(oxan-4-yl)methanone Chemical compound C(C)N1N=CC(=C1C)C=1N(C2=NC=NC(=C2N=1)O[C@@H]1CN(CC1)C(=O)C1CCOCC1)C FHKPLLOSJHHKNU-INIZCTEOSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000006258 conductive agent Substances 0.000 description 3
- 229910000365 copper sulfate Inorganic materials 0.000 description 3
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000011076 safety test Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 150000003585 thioureas Chemical class 0.000 description 3
- 229920003169 water-soluble polymer Polymers 0.000 description 3
- OBDVFOBWBHMJDG-UHFFFAOYSA-N 3-mercapto-1-propanesulfonic acid Chemical compound OS(=O)(=O)CCCS OBDVFOBWBHMJDG-UHFFFAOYSA-N 0.000 description 2
- -1 3-sulfopropyl Chemical group 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- FLVIGYVXZHLUHP-UHFFFAOYSA-N N,N'-diethylthiourea Chemical compound CCNC(=S)NCC FLVIGYVXZHLUHP-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 229910001431 copper ion Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 125000004434 sulfur atom Chemical class 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- HYQPMIXMFATKPF-UHFFFAOYSA-N (5-sulfanylidene-2H-tetrazol-1-yl) benzenesulfonate Chemical compound C1(=CC=CC=C1)S(=O)(=O)ON1N=NN=C1S HYQPMIXMFATKPF-UHFFFAOYSA-N 0.000 description 1
- HNSDLXPSAYFUHK-UHFFFAOYSA-N 1,4-bis(2-ethylhexyl) sulfosuccinate Chemical compound CCCCC(CC)COC(=O)CC(S(O)(=O)=O)C(=O)OCC(CC)CCCC HNSDLXPSAYFUHK-UHFFFAOYSA-N 0.000 description 1
- LLOAINVMNYBDNR-UHFFFAOYSA-N 2-sulfanylidene-1,3-dihydrobenzimidazole-5-sulfonic acid Chemical compound OS(=O)(=O)C1=CC=C2NC(=S)NC2=C1 LLOAINVMNYBDNR-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- JZUFKLXOESDKRF-UHFFFAOYSA-N Chlorothiazide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC2=C1NCNS2(=O)=O JZUFKLXOESDKRF-UHFFFAOYSA-N 0.000 description 1
- RUPBZQFQVRMKDG-UHFFFAOYSA-M Didecyldimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC RUPBZQFQVRMKDG-UHFFFAOYSA-M 0.000 description 1
- 239000002000 Electrolyte additive Substances 0.000 description 1
- PDQAZBWRQCGBEV-UHFFFAOYSA-N Ethylenethiourea Chemical compound S=C1NCCN1 PDQAZBWRQCGBEV-UHFFFAOYSA-N 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- VLCDUOXHFNUCKK-UHFFFAOYSA-N N,N'-Dimethylthiourea Chemical compound CNC(=S)NC VLCDUOXHFNUCKK-UHFFFAOYSA-N 0.000 description 1
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 229920002873 Polyethylenimine Polymers 0.000 description 1
- 229910018540 Si C Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- MNOILHPDHOHILI-UHFFFAOYSA-N Tetramethylthiourea Chemical compound CN(C)C(=S)N(C)C MNOILHPDHOHILI-UHFFFAOYSA-N 0.000 description 1
- VJMAYFFRCKGLAP-UHFFFAOYSA-M [Na+].NC(SCCCS(=O)(=O)[O-])=N Chemical compound [Na+].NC(SCCCS(=O)(=O)[O-])=N VJMAYFFRCKGLAP-UHFFFAOYSA-M 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- HTKFORQRBXIQHD-UHFFFAOYSA-N allylthiourea Chemical compound NC(=S)NCC=C HTKFORQRBXIQHD-UHFFFAOYSA-N 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 230000001153 anti-wrinkle effect Effects 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 229940105329 carboxymethylcellulose Drugs 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- QUQFTIVBFKLPCL-UHFFFAOYSA-L copper;2-amino-3-[(2-amino-2-carboxylatoethyl)disulfanyl]propanoate Chemical compound [Cu+2].[O-]C(=O)C(N)CSSCC(N)C([O-])=O QUQFTIVBFKLPCL-UHFFFAOYSA-L 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- HTXDPTMKBJXEOW-UHFFFAOYSA-N dioxoiridium Chemical compound O=[Ir]=O HTXDPTMKBJXEOW-UHFFFAOYSA-N 0.000 description 1
- WIYCQLLGDNXIBA-UHFFFAOYSA-L disodium;3-(3-sulfonatopropyldisulfanyl)propane-1-sulfonate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)CCCSSCCCS([O-])(=O)=O WIYCQLLGDNXIBA-UHFFFAOYSA-L 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 229940071826 hydroxyethyl cellulose Drugs 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910000457 iridium oxide Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- AFBPBCGMRQTNBB-UHFFFAOYSA-M sodium N,N-dimethyl-4-oxidosulfonothioylbutanethioamide Chemical compound [Na+].CN(C(=S)CCCS(=O)(=S)[O-])C AFBPBCGMRQTNBB-UHFFFAOYSA-M 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
-
- 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
- H01M10/052—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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- 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
- H01M2004/021—Physical characteristics, e.g. porosity, surface area
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/09—Use of materials for the conductive, e.g. metallic pattern
-
- 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
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- General Chemical & Material Sciences (AREA)
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- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
(식 1) 두께(㎛)/ (인장강도(kgf/㎟) * 연신율(%)) ≤ 0.1
Description
도 2는 전해동박에 대한 에릭슨 테스트를 개략적으로 나타낸 도면이다.
도 3은 본 발명의 실시예에 기재된 TOC를 설명하기 위한 개략적인 도면이다.
도 4은 본 발명의 다른 실시예에 따른 이차전지용 전해동박을 음극집전체로 이용하여 제조된 전극조립체를 개략적으로 도시한 도면이다.
도 5 및 도 6은 본 실시예에 따른 에릭슨 테스트를 수행한 장비를 나타낸 도면이다.
도 7은 실시예 및 비교예에 대해서 각각 겹침 (중첩)의 장수를 달리하여 에릭슨 테스트를 한 결과를 나타낸 사진이다.
도 8은 도 7에서 실시예 3, 4 및 비교예 2에 대한 확대사진이다.
두께(㎛) | 첨가제A (ppm) |
첨가제B (ppm) |
첨가제 C (ppm) |
첨가제 D (ppm) |
DDAC (ppm) |
전해액 내 TOC (ppm) |
전해액 내 Cl (ppm) |
|
실시예1 | 6 | 11 | 60 | 20 | 30 | 1000 | 30 | |
실시예2 | 8 | 12 | 70 | 10 | 20 | 800 | 30 | |
실시예3 | 35 | 11 | 100 | 5 | 5 | 500 | 19 | |
실시예4 | 35 | 1 | 60 | 40 | 10 | 10 | 5 | |
실시예5 | 35 | 3 | 60 | 40 | 10 | 100 | 10 | |
비교예1 | 35 | 21.1 | 13.8 | 52.3 | 66 | |||
비교예2 | 50 | 3.4 | 60 | 70 | 60 |
전해동박 내 TOC (ppm) | 전해동박 내 Cl (ppm) |
|
실시예1 | 3 | 4 |
실시예2 | 2.8 | 4 |
실시예3 | 2.59 | 3.57 |
실시예4 | 0.5 | 0.1 |
실시예5 | 1.5 | 0.9 |
비교예1 | 5 | 11 |
비교예2 | 4.7 | 10.8 |
상온측정 | 200℃ 측정 | |||||
두께(㎛) | 인장강도 (kgf/㎟) |
연신율(%) | 두께/인장강도 * 연신율 | 인장강도 (kgf/㎟) |
연신율(%) | |
실시예1 | 6 | 95.2 | 3.8 | 0.016585582 | 90.4 | 3.1 |
실시예2 | 8 | 96.6 | 4.8 | 0.017253278 | 92.8 | 4.1 |
실시예3 | 35 | 91.4 | 5.1 | 0.075084738 | 75.9 | 3.6 |
실시예4 | 35 | 46.4 | 11 | 0.068573668 | 45.1 | 10 |
실시예5 | 35 | 47.1 | 10.9 | 0.068174292 | 42.0 | 11.1 |
비교예1 | 35 | 70.8 | 1.5 | 0.329566855 | 67.1 | 1.5 |
비교예2 | 50 | 95.4 | 3.8 | 0.137923425 | 83.5 | 4.8 |
두께(㎛) | 적층 전해동박 수(개) | 에릭슨 테스트 | 전지 압축 테스트 | |
실시예1 | 6 | 6 | 3.5mm | Pass |
실시예2 | 8 | 5 | 3.2mm | Pass |
실시예3 | 35 | 1 | 3.3mm | Pass |
실시예4 | 35 | 1 | 3.9mm | Pass |
실시예5 | 35 | 1 | 4.0mm | Pass |
비교예1 | 35 | 1 | 2.8mm | NG |
비교예2 | 50 | 1 | 2.9mm | NG |
110 : 음극
120 : 양극
130 : 세퍼레이터
Claims (7)
- 전해동박에 있어서,
TOC (Total Organic Carbon) 0.5ppm 내지 3ppm이고, Cl (염소)는 0.1ppm 내지 4ppm이며, 하기 (식 1)을 만족시키는 단층 또는 2 이상의 적층체로 구성되고,
상기 전해동박의 두께가 35um 이상에서의 에릭슨 테스트 (Erichsen test)로 구한 파단높이가 3㎜ 이상인 전해동박.
(식 1) 두께(㎛)/ (인장강도(kgf/㎟) * 연신율(%)) ≤ 0.1 - 삭제
- 제1항에 있어서,
상기 전해동박의 인장강도는 45kgf/㎟ 이상이고, 연신율은 3% 이상인 전해동박. - 제1항에 있어서,
광택도 (Gs (60°))가 100 이상인 전해동박. - 제 1항, 제3항, 및 제4항 중 어느 한 항에 있어서,
상기 전해동박을 음극집전체로 사용하여 이에 로딩레벨 (loading level) 1.0g/㎤ 이상으로 음극 활물질이 코팅된 리튬 2차 전지용 음극. - 제 1항, 제3항, 및 제4항 중 어느 한 항에 있어서,
전해동박을 음극집전체로 이용하고 상기 전해동박 상에 음극활물질이 코팅된 음극;
상기 음극과 전기적으로 연결되고, 리튬화합물을 포함하는 양극활물질이 코팅된 양극;
상기 음극과 양극 사이에 개재되는 세퍼레이터;를 포함하는 전극조립체와,
상기 전극조립체를 전해액과 함께 전지케이스 내에 수납하여 형성된 리튬 이차전지. - 제 1항, 제3항, 및 제4항 중 어느 한 항에 있어서,
상기 전해동박이 어느 일면에 구비된 인쇄회로기판.
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US16/242,451 US11362336B2 (en) | 2018-05-16 | 2019-01-08 | Electrolytic copper foil and secondary battery using the same |
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