KR100838987B1 - 리튬-금속 복합산화물 및 이를 이용한 전기 화학 소자 - Google Patents
리튬-금속 복합산화물 및 이를 이용한 전기 화학 소자 Download PDFInfo
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- KR100838987B1 KR100838987B1 KR1020070016850A KR20070016850A KR100838987B1 KR 100838987 B1 KR100838987 B1 KR 100838987B1 KR 1020070016850 A KR1020070016850 A KR 1020070016850A KR 20070016850 A KR20070016850 A KR 20070016850A KR 100838987 B1 KR100838987 B1 KR 100838987B1
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Abstract
Description
리튬-금속 복합산화물 | 과립 전 | 과립 후 소성 전 | 과립 및 소성 후 (실시예 1) |
두께 (mm) | 12.4 | 4.51 | 3.84 |
비교예 1 | 실시예 1 | 실시예 2 | |
IA/IB | 0.039 | 0.021 | 0.012 |
WB/WA | 21.45 | 20.30 | 15.31 |
IA: Co cluster 주위의 Li 피크의 강도(intensity) IB: Ni, Mn, Co 주위의 Li 피크의 강도(intensity) WA: Co cluster 주위의 Li 피크의 선폭(line width) (Hz 단위) WB: Ni, Mn, Co 주위의 broad한 Li 피크의 평균 선폭(line width) (Hz 단위) |
비교예1 | 실시예 1 | 실시예2 | |
Grain Size (nm) | 339 | 668 | 1000 |
Claims (16)
- 상자성(paramagnetic) 금속과 반자성(diamagnetic) 금속을 포함하는 리튬 함유 금속 복합산화물로서,(a) 하기 7Li-NMR 측정 조건 및 방법에 의해 얻어지는 0±10ppm의 메인 피크(I0ppm)와 240±140ppm의 메인 피크(I240ppm)의 상대적 강도(intensity)의 비(I0ppm / I240ppm)가 0.117·Z (이때, Z는 리튬 대비 반자성 금속의 몰수임)값 미만이거나;(b) 상기 0±10ppm의 메인 피크(I0ppm)와 240±140ppm의 메인 피크(I240ppm)의 상대적인 선폭(line width)의 비(W240ppm / W0ppm)가 21.45 미만이거나; 또는(c) 이들 모두를 만족시키는 것이 특징인 리튬 함유 금속 복합산화물.[측정 조건]300MHz solid state NMR 시스템MAS spinning rate: 32kHzSpectral frequency: 116.6420 MHzTemperature : room temperature (25℃)Chemical shift value standard: 1M LiCl in H2OPulse sequence : spin echo (90°-τ1- 180 °-τ2)Spectrum width: 500,000HzPulse length : 90°, pulse length -2.25 μsec180°pulse length -4.50 μsecDwell time (τ1): 31.25 μsecPulse delay: 2sec
- 제 1항에 있어서, 7Li-NMR 측정시 0±10ppm의 메인 피크(I0ppm)와 240±140ppm의 메인 피크(I240ppm)의 상대적 강도(intensity)의 비(I0ppm / I240ppm)가 0.039 미만인 것이 특징인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 7Li-NMR 측정시 0±10ppm의 메인 피크(I0ppm)와 240±140ppm의 메인 피크(I240ppm)의 상대적 강도(intensity)의 비(I0ppm / I240ppm)가 0.021 이하인 것이 특징인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 7Li-NMR 측정시 0±10ppm의 메인 피크(I0ppm)와 240±140ppm의 메인 피크(I240ppm)의 상대적인 선폭(line width)의 비(W240ppm / W0ppm)가 20.30 이하인 것이 특징인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 리튬을 제외한 금속 성분이 2종 이상의 다성분계인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 상기 리튬 함유 금속 복합산화물은 하기 화학식 1 또는 화학식 2로 표기되는 것이 특징인 리튬 함유 금속 복합산화물:[화학식 1]Li1+aA1-xCxO2-bXb (-0.5≤a≤+0.5, 0≤b≤+0.1, 0≤x≤+0.1)[화학식 2]Li1+aB2-x-yA′xCyO4-bXb (-0.5≤a≤+0.5, 0≤b≤+0.1, 0≤x≤+2, 0≤y≤0.1)상기 식에서,A는 6배위 구조를 갖는 전이금속 중에서 선택되는 2종 이상의 원소이며;A′는 6배위 구조를 갖는 전이금속 중에서 선택되는 1종 이상의 원소이며;B는 4배위 구조를 갖는 전이금속 중에서 선택되는 2종 이상의 원소이며;C는 알칼리 토금속, 3B족으로 구성된 군으로부터 선택된 1종 이상의 원소이며;X는 5B, 6B 및 7B족으로 구성된 군으로부터 선택된 1종 이상의 원소이다.
- 제 6항에 있어서, 상기 화학식 1의 A는 Ni, Co, Mn 중에서 선택되는 2종 이상의 원소이며, C는 Al 또는 Mg이며, X는 F, S 또는 N인 것이 특징인 리튬 함유 금 속 복합산화물.
- 제 6항에 있어서, 상기 화학식 2의 B 또는 A′는 Ni, Co, Mn 중에서 선택되는 원소이며, C는 Al 또는 Mg이며, X는 F, S 또는 N인 것이 특징인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 상기 리튬 함유 금속 복합산화물은 Li1 + aNi1-x-yMnxCoyO2 (-0.5<a<0.5, 0<x<1, 0<y<1) 또는 Li1 + aNi1-x-y(Al or Mg)xCoyO2 (-0.5≤a<0.5, 0<x<0.1, 0<y<1)인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 과립체(granule) 형태인 리튬 함유 금속 복합산화물.
- 제 10항에 있어서, 상기 과립체의 크기(size)는 1 내지 100㎛ 범위인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 상기 리튬 함유 금속 복합산화물의 탭 밀도(tap density)는 1.8 g/cm3 이상인 것이 특징인 리튬 함유 금속 복합산화물.
- 제 1항에 있어서, 상기 리튬 함유 금속 복합산화물은 2종 이상의 전이금속을 포함하는 금속 전구체 수용액, 알칼리화제 및 리튬 전구체 화합물을 혼합하여 리튬을 제외한 전이금속 수산화물을 침전시킨 후, 상기 혼합물에 초임계 또는 아임계 조건하의 물을 혼합하여 기침전된 전이금속 수산화물 입자에 리튬 이온이 삽입된 리튬 함유 금속 복합산화물을 건조, 과립화 및 하소(calcination)시켜 제조된 것이 특징인 리튬 함유 금속 복합산화물.
- 제 1항 내지 제13항 중 어느 한 항의 리튬 함유 금속 복합산화물을 포함하는 전극.
- (a) 제 1항 내지 제13항 중 어느 한 항의 리튬 함유 금속 복합산화물을 포함하는 양극;(b) 음극;(c) 전해질; 및(d) 분리막을 포함하는 전기 화학 소자.
- 제 15항의 전기 화학 소자는 리튬 이차 전지인 전기 화학 소자.
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US (1) | US8206852B2 (ko) |
JP (1) | JP5377981B2 (ko) |
KR (1) | KR100838987B1 (ko) |
CN (1) | CN101426728B (ko) |
TW (1) | TWI335687B (ko) |
WO (1) | WO2007094645A1 (ko) |
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WO2007094644A1 (en) | 2006-02-17 | 2007-08-23 | Lg Chem, Ltd. | Preparation method of lithium-metal composite oxides |
WO2009145471A1 (ko) * | 2008-04-03 | 2009-12-03 | 주식회사 엘지화학 | 리튬 복합 전이금속 산화물 제조용 신규 전구체 |
JP5389170B2 (ja) * | 2008-08-04 | 2014-01-15 | ユミコア ソシエテ アノニム | 高結晶性リチウム遷移金属酸化物 |
CN102150305B (zh) * | 2008-09-10 | 2014-01-08 | 株式会社Lg化学 | 锂二次电池用正极活性材料 |
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JP2009526736A (ja) | 2009-07-23 |
CN101426728B (zh) | 2012-10-03 |
US20100227222A1 (en) | 2010-09-09 |
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KR20070082902A (ko) | 2007-08-22 |
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