KR20100052116A - 안전성이 우수한 리튬 이차전지용 양극 활물질 및 그 제조방법과 이를 포함하는 리튬 이차전지 - Google Patents
안전성이 우수한 리튬 이차전지용 양극 활물질 및 그 제조방법과 이를 포함하는 리튬 이차전지 Download PDFInfo
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Abstract
Description
구 분 | 코팅 전a | 코팅재료a | 코팅 후 | ||
평균입경 (d50-㎛) |
탭밀도 (g/cc) |
평균입경 (d50-㎛) |
탭밀도 (g/cc) |
||
실시예 1 | 9.70 | 2.53 | B, T | 9.45 | 2.63 |
실시예 2 | 9.70 | 2.53 | B, T | 9.52 | 2.61 |
실시예 3 | 9.70 | 2.53 | P, B, T | 9.50 | 2.59 |
실시예 4 | 9.70 | 2.53 | P, B, T, C | 9.54 | 2.57 |
실시예 5 | 10.21 | 2.55 | P, B, T, C | 10.02 | 2.74 |
구 분 | 1st 0.2C 충전용량 (mAh/g) |
1st 0.2C 방전용량 (mAh/g) |
1st 효율 (%) |
1st 비가역 용량 (mAh/g) |
정전압 충전비율 (%) |
실시예 1 | 171.7 | 151.6 | 88.3 | 20.1 | 1.4 |
실시예 2 | 171.6 | 152.4 | 88.8 | 19.2 | 1.2 |
실시예 3 | 172.0 | 151.5 | 88.1 | 20.5 | 1.2 |
실시예 4 | 172.1 | 153.3 | 89.1 | 18.8 | 0.9 |
실시예 5 | 166.4 | 149.3 | 89.7 | 17.1 | 0.9 |
비교예 1 | 171.5 | 152.8 | 89.1 | 18.7 | 1.1 |
비교예 2 | 166.9 | 149.7 | 89.7 | 17.2 | 0.8 |
비교예 3 | 166.4 | 145.6 | 87.5 | 20.8 | 1.6 |
구 분 | 코팅재료a (%) | 20C 방전 특성 (@0.5C, %) | 고온 유지 시간(hr) | ||
1 | 2 | 3 | |||
실시예 1 | B, T | 75.1 | O | ||
실시예 2 | B, T | 87.5 | O | ||
실시예 3 | P, B, T | 78.6 | O | ||
실시예 4 | P, B, T, C | 88.6 | O | ||
실시예 5 | P, B, T, C | 86.7 | O | ||
비교예 1 | X | 88.5 | 발화 | ||
비교예 2 | X | 86.4 | 발화 | ||
비교예 3 | 단순 혼합 | 78.5 | 발화 |
Claims (15)
- 리튬 금속 산화물 일차입자가 응집하여 형성된 리튬 금속 산화물 이차입자 코어부; 및상기 이차입자 코어부에 티탄산 바륨 및 금속 산화물을 코팅하여 형성된 쉘부를 포함하여 이루어지는 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,상기 리튬 금속 산화물은 LiCoO2, Li(NiaCobAlc)O2(0<a<1, 0<b<1, 0<c<1, a+b+c=1), Li(Nia-Cob-Mnc)O2(0<a<1, 0<b<1, 0<c<1, a+b+c=1) 및 LiMn2O4으로 이루어진 군에서 선택되는 어느 하나 또는 2종 이상의 혼합물인 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,상기 이차입자의 평균입경은 7~15㎛인 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,상기 티탄산 바륨의 평균입경은 1nm~1㎛이며, 금속 산화물의 평균입경은 1~100nm인 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,상기 금속 산화물은 산화알루미늄, 산화 티타늄, 산화 이트륨, 산화 마그네슘, 산화 아연 및 리튬 금속 산화물로 이루어진 군에서 선택되는 어느 하나 또는 2종 이상의 혼합물인 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- 제5항에 있어서,상기 리튬 금속 산화물은 층상 리튬 복합금속 산화물, 리튬 코발트 산화물 및 스피넬형 리튬 망간 산화물로 이루어진 군에서 선택되는 어느 하나 또는 2종 이상의 혼합물인 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,상기 쉘부는 올리빈형 인산철 리튬 산화물을 더 포함하는 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- 제1항에 있어서,상기 쉘부는 도전재를 더 포함하는 것을 특징으로 하는 리튬 이차전지용 양극 활물질.
- (S1) 금속 수산화물과 리튬염을 소성시켜 리튬 금속 산화물 일차입자가 응집된 리튬 금속 산화물 이차입자 코어부를 제조하는 단계;(S2) 티탄산 바륨 및 금속 산화물을 상기 코어부에 건식 코팅하여 상기 코어부 외부에 쉘부를 형성하는 단계; 및(S3) 상기 결과물을 열처리하는 단계를 포함하는 리튬 이차전지용 양극 활물질의 제조방법.
- 제9항에 있어서,상기 (S1) 단계에서 상기 금속 수산화물은 공침법에 따라 제조되는 것을 특징으로 하는 리튬 이차전지용 양극 활물질의 제조방법.
- 제9항에 있어서,상기 (S2) 단계에서 올리빈형 인산 리튬 산화물을 더 포함하여 함께 상기 코어부에 건식 코팅하여 쉘부를 형성하는 것을 특징으로 하는 리튬 이차전지용 양극 활물질의 제조방법.
- 제9항에 있어서,상기 (S2) 단계에서 도전재를 더 포함하여 함께 상기 코어부에 건식 코팅하여 쉘부를 형성하는 것을 특징으로 하는 리튬 이차전지용 양극 활물질의 제조방법.
- 제9항에 있어서,상기 (S3) 단계의 열처리는300~600℃에서 4~12시간 동안 수행되는 것을 특징으로 하는 리튬 이차전지용 양극 활물질의 제조방법.
- 양극 집전체 및 상기 양극 집전체의 적어도 일면에 형성되며, 양극 활물질 및 바인더 수지를 포함하는 양극 활물질 층을 구비한 리튬 이차전지의 양극에 있어서,상기 양극 활물질이 제1항 내지 제8항 중 어느 한 항의 양극 활물질인 것을 특징으로 하는 리튬 이차전지의 양극.
- 양극, 음극 및 상기 양극과 음극 사이에 개재된 격리막을 포함하는 리튬 이차전지에 있어서,상기 양극이 제14항에 따른 양극인 것을 특징으로 하는 리튬 이차전지.
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KR1020080111004A KR101050438B1 (ko) | 2008-11-10 | 2008-11-10 | 안전성이 우수한 리튬 이차전지용 양극 활물질 및 그 제조방법과 이를 포함하는 리튬 이차전지 |
JP2011507330A JP5231631B2 (ja) | 2008-11-10 | 2008-11-11 | リチウム二次電池用正極活物質、その製造方法、これを含むリチウム二次電池の正極、及びリチウム二次電池 |
EP08878002.8A EP2362972B1 (en) | 2008-11-10 | 2008-11-11 | Cathode active material for lithium secondary batteries with high safety and method of preparing for the same and lithium secondary batteries comprising the same |
CN200880013968.0A CN101884126B (zh) | 2008-11-10 | 2008-11-11 | 用于具有高度安全性的锂蓄电池的阴极活性材料、制备所述材料的方法以及包含所述材料的锂蓄电池 |
BRPI0808316-9A BRPI0808316A2 (pt) | 2008-11-10 | 2008-11-11 | "material para catodo ativo para uma bateria secundária de lítio, método para preparar um material para catodo ativo para bateria secundária de lítio, catodo de uma bateria secundária de lítio e bateria seundária de lítio" |
AU2008349764A AU2008349764B2 (en) | 2008-11-10 | 2008-11-11 | Cathode active material for lithium secondary batteries with high safety and method of preparing for the same and lithium secondary batteries comprising the same |
CA2674756A CA2674756A1 (en) | 2008-11-10 | 2008-11-11 | Cathode active material for lithium secondary batteries containing lithium transition metal oxide |
RU2009130483/09A RU2408112C1 (ru) | 2008-11-10 | 2008-11-11 | Активный материал катода для литиевых батарей, способ изготовления материала и литиевые батареи, включающие этот материал |
US12/528,151 US8367247B2 (en) | 2008-11-10 | 2008-11-11 | Cathode active material for lithium secondary batteries with high safety, method of preparing the same and lithium secondary batteries comprising the same |
PCT/KR2008/006643 WO2010053222A1 (en) | 2008-11-10 | 2008-11-11 | Cathode active material for lithium secondary batteries with high safety and method of preparing for the same and lithium secondary batteries comprising the same |
TW098127041A TWI398033B (zh) | 2008-11-10 | 2009-08-12 | 用於鋰二次電池之高安全陰極活性材料與製備該材料及包含該材料之鋰二次電池之方法 |
ARP090104214A AR074079A1 (es) | 2008-11-10 | 2009-10-30 | Un material activo catodico para una bateria secundaria de litio, un metodo para preparar dicho material, un catodo para una bateria secundaria de litio que incluye dicho material y la bateria secundaria de litio que incluye dicho catodo |
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AU2008349764B2 (en) | 2011-06-16 |
CA2674756A1 (en) | 2010-05-10 |
TWI398033B (zh) | 2013-06-01 |
US8367247B2 (en) | 2013-02-05 |
CN101884126A (zh) | 2010-11-10 |
WO2010053222A1 (en) | 2010-05-14 |
CN101884126B (zh) | 2014-07-02 |
RU2408112C1 (ru) | 2010-12-27 |
EP2362972A4 (en) | 2012-06-27 |
EP2362972A1 (en) | 2011-09-07 |
TW201019520A (en) | 2010-05-16 |
BRPI0808316A2 (pt) | 2015-07-28 |
JP5231631B2 (ja) | 2013-07-10 |
KR101050438B1 (ko) | 2011-07-19 |
JP2011519142A (ja) | 2011-06-30 |
AR074079A1 (es) | 2010-12-22 |
AU2008349764A1 (en) | 2010-05-27 |
EP2362972B1 (en) | 2014-03-19 |
US20100310940A1 (en) | 2010-12-09 |
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