KR100728160B1 - 리튬 이차 전지용 음극 활물질, 이의 제조 방법 및 이를포함하는 리튬 이차 전지 - Google Patents
리튬 이차 전지용 음극 활물질, 이의 제조 방법 및 이를포함하는 리튬 이차 전지 Download PDFInfo
- Publication number
- KR100728160B1 KR100728160B1 KR1020050116028A KR20050116028A KR100728160B1 KR 100728160 B1 KR100728160 B1 KR 100728160B1 KR 1020050116028 A KR1020050116028 A KR 1020050116028A KR 20050116028 A KR20050116028 A KR 20050116028A KR 100728160 B1 KR100728160 B1 KR 100728160B1
- Authority
- KR
- South Korea
- Prior art keywords
- lithium secondary
- active material
- negative electrode
- secondary battery
- electrode active
- Prior art date
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 70
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Abstract
Description
Claims (18)
- 활성 금속 입자를 포함하는 코어; 및상기 코어 표면에 형성되며 탄소계 물질을 포함하는 균열 방지층을 포함하는 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서,상기 활성 금속은 Si, Sn, Al, Zn, Pb, Bi, Ag, Cd, 및 Sb로 이루어진 군에서 선택되는 1종 이상의 금속인 리튬 이차 전지용 음극 활물질.
- 제 2 항에 있어서,상기 활성 금속은 Si 및 Sn으로 이루어진 군에서 선택되는 1종 이상의 금속인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서,상기 탄소계 물질은 탄소 파이버, 및 탄소 나노 튜브로 이루어진 군에서 선택되는 1종 이상의 것인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서,상기 활성 금속 입자의 입경은 50㎛ 이하인 리튬 이차 전지용 음극 활물질.
- 제 5 항에 있어서,상기 활성 금속 입자의 입경은 1 내지 10㎛인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서,상기 활성 금속 입자의 입경에 대한 상기 균열 방지층의 두께의 비는 1/1000 내지 1/2인 리튬 이차 전지용 음극 활물질.
- 제 7 항에 있어서,상기 활성 금속 입자의 입경에 대한 상기 균열 방지층의 두께의 비는 1/100 내지 1/10인 리튬 이차 전지용 음극 활물질.
- 탄소계 물질과 분산제를 용매에 첨가하여 탄소계 물질 분산 코팅액을 제조한 후 산도(pH)를 1 내지 6으로 조절하는 단계;활성 금속 입자를 계면활성제 현탁액에 첨가하여 계면활성제가 코팅된 활성 금속 현탁액을 제조하는 단계;상기 탄소계 물질 분산 코팅액과 상기 현탁액을 혼합한 후 혼합물의 산도(pH)를 1 내지 6으로 조절하는 단계; 및상기 혼합물을 열처리하는 단계를 포함하는 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 9 항에 있어서,상기 탄소계 물질은 탄소 파이버, 탄소 나노 튜브, 결정질 탄소계 물질 및 비정질 탄소계 물질로 이루어진 군에서 선택되는 것인 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 9항에 있어서,상기 활성 금속은 Si, Sn, Al, Zn, Pb, Bi, Ag, Cd, 및 Sb로 이루어진 군에서 선택되는 1종 이상의 금속인 리튬 이차 전지용 음극 활물질의 제조 방법
- 제 11 항에 있어서,상기 활성 금속은 Si 및 Sn으로 이루어진 군에서 선택되는 1종 이상의 금속인 리튬 이차 전지용 음극 활물질의 제조 방법
- 제 9 항에 있어서,상기 활성 금속 분말은 평균 입경이 50㎛ 이하인 금속 입자로 이루어진 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 9 항에 있어서,상기 분산제는 폴리아크릴레이트계 수지, 폴리에틸렌 옥사이드, 폴리프로필렌 옥사이드, 에틸렌 옥사이드(EO)와 프로필렌 옥사이드(PO)를 포함하는 (EO)l(PO)m(EO)l(l 및 m은 1 내지 500의 범위에 있음.) 블록 코폴리머, 폴리비닐클로라이드(PVC), 아크릴로니트릴/부타디엔/스티렌(ABS) 폴리머, 아크릴로니트릴/스티렌/아크릴에스테르(ASA) 폴리머, 아크릴로니트릴/스티렌/아크릴에스테르(ASA) 폴리머와 프로필렌 카보네이트의 혼합물, 스티렌/아크릴로니트릴(SAN) 코폴리머, 메틸메타크릴레이트/아크릴로니트릴/부타디엔/스티렌(MABS) 폴리머로 이루어지는 군으로부터 선택되는 것인 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 9 항에 있어서,상기 계면 활성제는 설포네이트(RSO3 -), 설페이트(RSO4 -), 카르복실레이트(RCOO-), 포스페이트(RPO4 -), 암모늄(RxHyN+: x는 1-3이고 y는 3-1임), 4차 암모늄(R4N+), 베타인(Betaines; RN+(CH3)2CH2COO-), 설포베타인(Sulfobetaines; RN+(CH3)2CH2SO3 -), 폴리에틸렌 옥사이드(R-OCH2CH2(OCH2CH2)nOH), 아민 화합물 및 젤라틴으로 이루어지는 군으로부터 선택되고,상기 R은 포화 또는 불포화 탄화수소기인 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 1 항 내지 제 8 항 중 어느 한 항의 음극 활물질을 포함하는 음극을 포함하는 리튬 이차 전지.
- 제1항에 있어서,상기 탄소계 물질은 결정질 탄소계 물질 또는 비정질 탄소계 물질인 것인 리튬 이차 전지용 음극 활물질.
- 제16항에 있어서,상기 리튬 이차 전지는 양극 활물질을 포함하는 양극을 포함하고,상기 양극 활물질은 LiMn2O4, LiCoO2, LiNiO2, LiFeO2, V2O5, TiS, 및 MoS로 이루어진 군에서 선택되는 것인 리튬 이차 전지.
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KR1020050116028A KR100728160B1 (ko) | 2005-11-30 | 2005-11-30 | 리튬 이차 전지용 음극 활물질, 이의 제조 방법 및 이를포함하는 리튬 이차 전지 |
US11/604,099 US8394532B2 (en) | 2005-11-30 | 2006-11-22 | Negative active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery comprising the same |
US13/794,755 US20130189585A1 (en) | 2005-11-30 | 2013-03-11 | Negative active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery comprising the same |
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Cited By (3)
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WO2015099379A1 (ko) * | 2013-12-27 | 2015-07-02 | 주식회사 엘지화학 | 도전재 조성물, 이를 사용한 리튬 이차 전지의 전극 형성용 슬러리 조성물 및 리튬 이차 전지 |
KR20150084795A (ko) * | 2012-11-21 | 2015-07-22 | 쇼와 덴코 가부시키가이샤 | 리튬 이온 전지용 부극재의 제조방법 |
US10033044B2 (en) | 2013-12-27 | 2018-07-24 | Lg Chem, Ltd. | Conducting material composition, and slurry composition for forming electrode of lithium rechargeable battery and lithium rechargeable battery using the same |
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US8394532B2 (en) | 2013-03-12 |
US20070122712A1 (en) | 2007-05-31 |
KR20070056875A (ko) | 2007-06-04 |
US20130189585A1 (en) | 2013-07-25 |
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