KR101579641B1 - 리튬 이차전지용 음극 활물질 및 이를 포함하는 리튬 이차전지 - Google Patents
리튬 이차전지용 음극 활물질 및 이를 포함하는 리튬 이차전지 Download PDFInfo
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- KR101579641B1 KR101579641B1 KR1020120057627A KR20120057627A KR101579641B1 KR 101579641 B1 KR101579641 B1 KR 101579641B1 KR 1020120057627 A KR1020120057627 A KR 1020120057627A KR 20120057627 A KR20120057627 A KR 20120057627A KR 101579641 B1 KR101579641 B1 KR 101579641B1
- Authority
- KR
- South Korea
- Prior art keywords
- active material
- negative electrode
- lithium
- secondary battery
- coating layer
- Prior art date
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- 229910052744 lithium Inorganic materials 0.000 title claims description 59
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- HBZFBSFGXQBQTB-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F HBZFBSFGXQBQTB-UHFFFAOYSA-N 0.000 claims description 4
- 239000006182 cathode active material Substances 0.000 claims description 4
- QTKPMCIBUROOGY-UHFFFAOYSA-N 2,2,2-trifluoroethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(F)(F)F QTKPMCIBUROOGY-UHFFFAOYSA-N 0.000 claims description 3
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- CDXFIRXEAJABAZ-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F CDXFIRXEAJABAZ-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
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- QUKRIOLKOHUUBM-UHFFFAOYSA-N 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heptadecafluorodecyl prop-2-enoate Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCOC(=O)C=C QUKRIOLKOHUUBM-UHFFFAOYSA-N 0.000 claims 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 2
- 229910013063 LiBF 4 Inorganic materials 0.000 description 2
- 229910013684 LiClO 4 Inorganic materials 0.000 description 2
- 229910015643 LiMn 2 O 4 Inorganic materials 0.000 description 2
- 229910012513 LiSbF 6 Inorganic materials 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
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- 239000000498 cooling water Substances 0.000 description 2
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- 239000011888 foil Substances 0.000 description 2
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- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- 229910010238 LiAlCl 4 Inorganic materials 0.000 description 1
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- HSZCZNFXUDYRKD-UHFFFAOYSA-M lithium iodide Inorganic materials [Li+].[I-] HSZCZNFXUDYRKD-UHFFFAOYSA-M 0.000 description 1
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- QEXMICRJPVUPSN-UHFFFAOYSA-N lithium manganese(2+) oxygen(2-) Chemical class [O-2].[Mn+2].[Li+] QEXMICRJPVUPSN-UHFFFAOYSA-N 0.000 description 1
- 229910021437 lithium-transition metal oxide Inorganic materials 0.000 description 1
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Classifications
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- 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
- H01M4/134—Electrodes based on metals, Si or alloys
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- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
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- H01M4/02—Electrodes composed of, or comprising, active material
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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
- H01M4/386—Silicon or alloys based on silicon
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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
- H01M4/60—Selection of substances as active materials, active masses, active liquids of organic compounds
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- H01M4/623—Binders being polymers fluorinated polymers
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- H—ELECTRICITY
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Abstract
Description
도 1은 본 발명의 일 실험예 1에 따른 불소 함유 고분자 코팅층으로 코팅된 음극 활물질과 불소 함유 고분자로 코팅되지 않은 음극 활물질을 포함하는 리튬 이차전지의 충방전 효율을 비교한 그래프이다.
Claims (16)
- (a) 실리콘, 니켈, 게르마늄 및 티타늄으로 이루어진 군으로부터 선택된 하나 이상의 비탄소계 물질을 포함하는 코어; 및
(b) 상기 코어 표면에 형성되는 유기 고분자 코팅층을 포함하는 것을 특징으로 하는 음극 활물질로서,
상기 유기 고분자 코팅층은 불소 성분의 함량이 50∼95중량%인 고분자 화합물로 이루어지고,
상기 고분자 화합물은 하기 화학식 1의 에폭시 화합물 또는 하기 화학식 2의 아크릴레이트 화합물을 중합한 고분자 화합물인 것을 특징으로 하는 음극 활물질.
[화학식 1]
[화학식 2]
상기 화학식 2에서, R은 수소 또는 탄소수 1 내지 2의 알킬기이고,
n은 1 또는 2의 정수이며, m은 0 또는 1 내지 12의 정수이다. - 청구항 1에 있어서,
상기 비탄소계 물질은 실리콘, 니켈, 게르마늄 또는 티타늄의 단일상 또는 이들의 합금상인 것을 특징으로 하는 음극 활물질. - 청구항 1에 있어서,
상기 비탄소계 물질은 나노 튜브 형태인 것을 특징으로 하는 음극 활물질. - 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 청구항 1에 있어서,
상기 아크릴레이트계 화합물은 2,2,2-트리플루오로에틸 메타크릴레이트, 2-(퍼플루오로헥실)에틸 메타크릴레이트, 2-(퍼플루오로옥틸)에틸 메타크릴레이트, 2-(퍼플루오로데실)에틸 메타크릴레이트 및 2-(퍼플루오로옥틸)에틸 아크릴레이트로 이루어진 군으로부터 선택되는 화합물인 것을 특징으로 하는 음극 활물질. - 삭제
- 삭제
- 청구항 1에 있어서,
상기 유기 고분자 코팅층은 단일막 또는 다층막으로 이루어진 것을 특징으로 하는 음극 활물질. - 청구항 12에 있어서,
상기 유기 고분자 코팅층의 두께는 50㎚∼100㎚인 것을 특징으로 하는 음극 활물질. - 청구항 1에 있어서,
상기 유기 고분자 코팅층은 화학 기상 증착 방법, 용매증발법, 공침법, 침전법, 졸겔법, 흡착후 필터법 또는 스퍼터 방법에 의해 형성되는 것을 특징으로 하는 음극 활물질. - (i) 양극 활물질을 포함하는 양극,
(ⅱ) 청구항 1에 기재된 음극 활물질을 포함하는 음극,
(ⅲ) 분리막, 및
(ⅳ) 전해액을 포함하는 것을 특징으로 하는 리튬 이차전지. - 청구항 15에 있어서,
상기 (ⅱ) 음극은 집전체 상에 음극 활물질을 코팅하여 제조하거나, 또는
음극 활물질과 바인더를 포함하는 조성물을 별도의 지지체 상에 캐스팅한 다음, 이 지지체로부터 박리하여 얻은 필름을 집전체 상에 라미네이션하여 제조하는 것을 특징으로 하는 리튬 이차전지.
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EP13797038.0A EP2858148B1 (en) | 2012-05-30 | 2013-05-28 | Negative pole active material for lithium secondary battery and lithium secondary battery comprising same |
JP2015514898A JP6070966B2 (ja) | 2012-05-30 | 2013-05-28 | リチウム二次電池用負極活物質及びこれを含むリチウム二次電池 |
PCT/KR2013/004644 WO2013180432A1 (ko) | 2012-05-30 | 2013-05-28 | 리튬 이차전지용 음극 활물질 및 이를 포함하는 리튬 이차전지 |
CN201380028876.0A CN104335395B (zh) | 2012-05-30 | 2013-05-28 | 锂二次电池用负极活性物质及包含该物质的锂二次电池 |
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