KR20040100058A - 리튬 이차 전지용 음극 활물질 및 그의 제조 방법 - Google Patents
리튬 이차 전지용 음극 활물질 및 그의 제조 방법 Download PDFInfo
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- KR20040100058A KR20040100058A KR1020030032259A KR20030032259A KR20040100058A KR 20040100058 A KR20040100058 A KR 20040100058A KR 1020030032259 A KR1020030032259 A KR 1020030032259A KR 20030032259 A KR20030032259 A KR 20030032259A KR 20040100058 A KR20040100058 A KR 20040100058A
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Abstract
Description
방전 용량(mAh/g, 0.2C) | Sn 중량비(%) | Sn 평균 입경(㎛) | 화합물 회절 분석 성분 | 초기 효율(%, 첫 번째 사이클) | 가역 효율 | 수명(%) | |
실시예 1 | 455 | 15 | 5 × 10-2 | 탄소, Sn | 92 | > 99.5 | 90 |
실시예 2 | 450 | 15 | 10 | 탄소, Sn | 90 | > 99.5 | 80 |
비교예 1 | 430 | 15 | 5 × 10-2 | 탄소, Sn | 88 | ∼96 | < 30 |
비교예 2 | 360 | 15 | 5 × 10-2 | 탄소, Sn | 65 | < 90 | - |
비교예 3 | 720 | 100 | 5 × 10-2 | Sn | 73 | < 90 | < 10 |
비교예 4 | 330 | 0 | - | 인조 흑연 | 94 | > 99.5 | 90 |
Claims (17)
- 리튬을 흡수 및 방출할 수 있는 탄소 물질; 및상기 탄소 물질 내부에 분산되어 있으며, 표면에 금속 산화막이 형성된, 리튬 원소와 합금화가 가능한 금속 또는 금속 화합물 입자; 및을 포함하는 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 금속 또는 금속 화합물은 하기 화학식 1을 갖는 것인 리튬 이차 전지용 음극 활물질.[화학식 1]A1-xBx(상기 화학식에서, 0 ≤ x ≤ 0.9,A는 Sn, Si, Ag, Zn, Cd, Al, Ga, In, Ce, Pb, As, Bi 및 Sb로 이루어진 군에서 선택되는 1종 이상의 금속이고,B는 Zr, Ti, Fe, Co, Ni, Cu, C, O, N 및 S로 이루어진 군에서 선택되는 1종 이상의 물질이다)
- 제 2 항에 있어서, 상기 x는 0 내지 0.5인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 금속 또는 금속 화합물은 비정질 또는 결정질인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 음극 활물질은 10㎛ 내지 100㎛의 평균 입경을 갖는 것인 리튬 이차 전지용 음극 활물질.
- 제 5 항에 있어서, 상기 음극 활물질은 20㎛ 내지 50㎛의 평균 입경을 갖는 것인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 금속 또는 금속 화합물 입자는 20 내지 500nm의 평균 입경을 갖는 것인 리튬 이차 전지용 음극 활물질.
- 제 7 항에 있어서, 상기 금속 또는 금속 화합물 입자는 20nm 내지 80nm의 평균 입경을 갖는 것인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 음극 활물질은 상기 금속 또는 금속 화합물을 10 내지 80 중량% 포함하는 것인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 음극 활물질 입경(Rc) 대 상기 금속 또는 금속 화합물 입자의 입경(Rm) 비는 20 이상인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 산화막의 두께는 10Å 이하인 리튬 이차 전지용 음극 활물질.
- 제 1 항에 있어서, 상기 음극 활물질은 구형 또는 타원형인 리튬 이차 전지용 음극 활물질.
- 금속 또는 금속 화합물 입자와 탄소 전구체 용액을 혼합하고;상기 혼합물을 건조하고;건조 생성물을 금속 산화물과 혼합하고;얻어지는 혼합물을 열처리하고;열처리된 생성물을 산 용액으로 처리하는공정을 포함하는 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 13 항에 있어서, 상기 금속 산화물은 SiO2, Al2O3, MgO, Y2O3, CaO, Co3O4, TiO2, ZrO2, SnO2, SnO 및 Fe2O3으로 이루어진 군에서 선택되는 1종 또는 2종 이상의 혼합물인 것인 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 13 항에 있어서, 상기 음극 활물질은 구형 또는 타원형인 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 13 항에 있어서, 상기 금속 산화물의 사용량은 탄소 전구체가 혼합된 금속 혹은 금속 화합물의 중량에 대하여 10 내지 30 중량%인 것인 리튬 이차 전지용 음극 활물질의 제조 방법.
- 제 13 항에 있어서, 상기 열처리 온도가 500 내지 2000℃인 리튬 이차 전지용 음극 활물질의 제조 방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020030032259A KR100570637B1 (ko) | 2003-05-21 | 2003-05-21 | 리튬 이차 전지용 음극 활물질 및 그의 제조 방법 |
CNB200410034642XA CN100487959C (zh) | 2003-05-21 | 2004-04-19 | 可充电锂电池的负极活性物质及其制备方法以及包含它的可充电锂电池 |
JP2004147154A JP2004349253A (ja) | 2003-05-21 | 2004-05-18 | リチウム二次電池用負極活物質,その製造方法,及びそれを含むリチウム二次電池 |
US10/848,168 US7452632B2 (en) | 2003-05-21 | 2004-05-19 | Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery comprising same |
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KR1020030032259A KR100570637B1 (ko) | 2003-05-21 | 2003-05-21 | 리튬 이차 전지용 음극 활물질 및 그의 제조 방법 |
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KR20040100058A true KR20040100058A (ko) | 2004-12-02 |
KR100570637B1 KR100570637B1 (ko) | 2006-04-12 |
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US (1) | US7452632B2 (ko) |
JP (1) | JP2004349253A (ko) |
KR (1) | KR100570637B1 (ko) |
CN (1) | CN100487959C (ko) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100646546B1 (ko) * | 2005-01-27 | 2006-11-23 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극활물질 및 그의 제조 방법 |
KR100786864B1 (ko) * | 2006-02-10 | 2007-12-20 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극 활물질, 그의 제조 방법 및 그를포함하는 리튬 이차 전지 |
KR100814816B1 (ko) * | 2006-11-27 | 2008-03-20 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극 활물질 및 그를 포함하는 리튬 이차전지 |
KR100830612B1 (ko) * | 2006-05-23 | 2008-05-21 | 강원대학교산학협력단 | 리튬 이차 전지용 음극 활물질, 그의 제조 방법 및 그를포함하는 리튬 이차 전지 |
KR100899551B1 (ko) * | 2007-10-02 | 2009-05-26 | 한국전기연구원 | 고효율 장수명 리튬이차전지용 음극, 전극 제조방법 및리튬이차전지 |
WO2009131700A2 (en) * | 2008-04-25 | 2009-10-29 | Envia Systems, Inc. | High energy lithium ion batteries with particular negative electrode compositions |
US8835051B2 (en) | 2007-04-05 | 2014-09-16 | Samsung Sdi Co., Ltd. | Negative active material for rechargeable lithium battery, method for preparing same, and rechargeable lithium battery including same |
US8835053B2 (en) | 2007-03-21 | 2014-09-16 | Samsung Sdi Co., Ltd. | Negative active material containing an intermetallic compound of silicon and a first metal and a metal matrix containing copper and aluminum for rechargeable lithium battery and rechargeable lithium battery containing the negative active material |
KR101451801B1 (ko) * | 2007-02-14 | 2014-10-17 | 삼성에스디아이 주식회사 | 음극 활물질, 그 제조 방법 및 이를 채용한 음극과 리튬전지 |
US9012073B2 (en) | 2008-11-11 | 2015-04-21 | Envia Systems, Inc. | Composite compositions, negative electrodes with composite compositions and corresponding batteries |
KR20150112746A (ko) * | 2014-03-28 | 2015-10-07 | 주식회사 엘지화학 | 리튬 이차전지용 음극활물질 및 그 제조방법 |
US9466828B2 (en) | 2013-07-15 | 2016-10-11 | Posco Chemtech Co., Ltd. | Method for preparing electrode active material for rechargeable lithium battery, electrode active material for rechargeable lithium battery, and rechargeable lithium battery |
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CN1574428A (zh) | 2005-02-02 |
JP2004349253A (ja) | 2004-12-09 |
US20040234859A1 (en) | 2004-11-25 |
KR100570637B1 (ko) | 2006-04-12 |
CN100487959C (zh) | 2009-05-13 |
US7452632B2 (en) | 2008-11-18 |
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