KR102464769B1 - 리튬 이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬 이차전지 - Google Patents
리튬 이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬 이차전지 Download PDFInfo
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Abstract
[식 1]
SOC1 < SOC2 < 1.1×SOC1
Description
도 2는 실시예 2에서 사용된 제2 양극활물질의 SEM 사진이다.
도 3은 비교예 2에서 사용된 제2 양극활물질의 SEM 사진이다.
도 4는 실시예 1 및 비교예 2의 양극을 사용한 리튬 이차전지에 대해 1C 충전시 SOC에 따른 출력 변화를 측정한 그래프이다.
단결정 사이즈(nm) | 코팅/도핑 함량(ppm) | |
실시예1 | 285 | - |
실시예2 | 157 | 4,500 |
비교예1 | 151 | - |
비교예2 | 156 | 700 |
제1 양극활물질의 1C 충전시 CV 진입 SOC (SOC1) | 제2 양극활물질의 1C 충전시 CV 진입 SOC (SOC2) | |
실시예1 | 77.8% | 81.5% |
실시예2 | 77.8% | 84.1% |
비교예1 | 77.8% | 91.4% |
비교예2 | 77.8% | 89.5% |
초기 용량(mAh/g) | 1C 충전시 CV 진입 SOC (LCO 단독 대비 증가량) |
용량유지율(%) (@150회 cycle) |
|
실시예1 | 4,620 | 81.2% (4.3%) | 95.5% |
실시예2 | 4,620 | 83.6% (7.5%) | 94.3% |
비교예1 | 4,620 | 91.2% (17.2%) | 12.3% |
비교예2 | 4,620 | 88.9% (14.3%) | 33.2% |
Claims (14)
- 하기 화학식 1로 표시되는 리튬 코발트계 산화물을 포함하는 제1 양극 활물질; 및
하기 화학식 2로 표시되고, 단결정 사이즈가 180nm 내지 400nm인 제2 양극 활물질;을 포함하며,
상기 제1 양극 활물질의 1C 충전시 평탄 준위 전압(CV) 도달 SOC(state of charge)를 SOC1이라고 하고, 상기 제2 양극 활물질의 1C 충전시 평탄 준위 전압(CV) 도달 SOC(state of charge)를 SOC2라고 할 때, 상기 SOC1 및 SOC2의 관계가 하기 식 1을 만족하는 리튬 이차전지용 양극.
[화학식 1]
Lia1Co1-x1M1 x1O2+β
(상기 화학식 1에서, M1은 Al, B, Ba, Ca, Zr, Ti, Mg, Ta, Nb, Sr, W 및 Mo로 이루어진 군에서 선택되는 1종 이상을 포함하고, 0.9<a1≤1.1, 0≤x1≤0.2, 0≤β≤0.02이다.)
[화학식 2]
Lia2Nix2Mny2Coz2M2 w2O2+δ
(상기 화학식 2에서, M2은 Al, B, Ba, Ca, Zr, Ti, Mg, Ta, Nb, Sr, W 및 Mo로 이루어진 군에서 선택되는 1종 이상을 포함하고, 0.9<a2≤1.1, 0.3≤x2≤0.95, 0<y2≤0.4, 0<z2≤0.5, 0≤w2≤0.1, 0≤δ≤0.02, x2+y2+z2=1이다.)
[식 1]
SOC1 < SOC2 < 1.1×SOC1
- 삭제
- 삭제
- 삭제
- 삭제
- 제1항에 있어서,
상기 제1 양극 활물질 및 제2 양극 활물질은 90:10 내지 30:70의 중량비로 혼합된 리튬 이차전지용 양극.
- 하기 화학식 1로 표시되는 리튬 코발트계 산화물을 포함하는 제1 양극 활물질; 및 하기 화학식 2로 표시되고, 단결정 사이즈가 180nm 내지 400nm인 제2 양극 활물질;을 준비하는 단계; 및
상기 제1 양극 활물질 및 제2 양극 활물질을 혼합하여 리튬 이차전지용 양극을 제조하는 단계;를 포함하며,
상기 제1 양극 활물질의 1C 충전시 평탄 준위 전압(CV) 도달 SOC(state of charge)를 SOC1이라고 하고, 상기 제2 양극 활물질의 1C 충전시 평탄 준위 전압(CV) 도달 SOC(state of charge)를 SOC2라고 할 때, 상기 SOC1 및 SOC2의 관계가 하기 식 1을 만족하도록 하는 리튬 이차전지용 양극의 제조방법.
[화학식 1]
Lia1Co1-x1M1 x1O2+β
(상기 화학식 1에서, M1은 Al, B, Ba, Ca, Zr, Ti, Mg, Ta, Nb, Sr, W 및 Mo로 이루어진 군에서 선택되는 1종 이상을 포함하고, 0.9<a1≤1.1, 0≤x1≤0.2, 0≤β≤0.02이다.)
[화학식 2]
Lia2Nix2Mny2Coz2M2 w2O2+δ
(상기 화학식 2에서, M2은 Al, B, Ba, Ca, Zr, Ti, Mg, Ta, Nb, Sr, W 및 Mo로 이루어진 군에서 선택되는 1종 이상을 포함하고, 0.9<a2≤1.1, 0.3≤x2≤0.95, 0<y2≤0.4, 0<z2≤0.5, 0≤w2≤0.1, 0≤δ≤0.02, x2+y2+z2=1이다.)
[식 1]
SOC1 < SOC2 < 1.1×SOC1
- 삭제
- 삭제
- 제7항에 있어서,
상기 제2 양극 활물질을 준비하는 단계는,
고상 반응법으로 제2 양극 활물질을 제조하는 공정을 포함하는 리튬 이차전지용 양극의 제조방법.
- 삭제
- 삭제
- 제7항에 있어서,
상기 제1 양극 활물질 및 제2 양극 활물질은 90:10 내지 30:70의 중량비로 혼합하는 리튬 이차전지용 양극의 제조방법.
- 제1항 및 제6항 중 어느 한 항에 따른 리튬 이차전지용 양극을 포함하는 리튬 이차전지.
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KR1020170090244A KR102464769B1 (ko) | 2017-07-17 | 2017-07-17 | 리튬 이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬 이차전지 |
PL18835882.4T PL3637509T3 (pl) | 2017-07-17 | 2018-07-11 | Elektroda dodatnia dla akumulatora litowego, sposób jej wytwarzania i zawierający ją akumulator litowy |
US16/621,752 US11769877B2 (en) | 2017-07-17 | 2018-07-11 | Positive electrode for lithium secondary battery, preparation method thereof, and lithium secondary battery including same |
JP2019570980A JP7045598B2 (ja) | 2017-07-17 | 2018-07-11 | リチウム二次電池用正極、その製造方法及びそれを含むリチウム二次電池 |
PCT/KR2018/007877 WO2019017643A2 (ko) | 2017-07-17 | 2018-07-11 | 리튬 이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬 이차전지 |
EP18835882.4A EP3637509B1 (en) | 2017-07-17 | 2018-07-11 | Positive electrode for lithium secondary battery, manufacturing method therefor, and lithium secondary battery comprising same |
CN201880037851.XA CN110710032B (zh) | 2017-07-17 | 2018-07-11 | 用于锂二次电池的正极、其制备方法以及包括其的锂二次电池 |
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KR102464769B1 (ko) | 2017-07-17 | 2022-11-08 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬 이차전지 |
CN111771303B (zh) * | 2017-12-26 | 2024-03-29 | 浦项控股股份有限公司 | 锂二次电池正极活性材料、其制备方法和包含它的锂二次电池 |
CN112803010A (zh) * | 2021-03-23 | 2021-05-14 | 深圳市贝特瑞纳米科技有限公司 | 三元正极材料及其制备方法和锂离子电池 |
KR20230004114A (ko) * | 2021-06-30 | 2023-01-06 | 주식회사 엘지에너지솔루션 | 수명 특성이 향상된 리튬 이차전지, 이의 구동방법, 이를 포함하는 전지 모듈 및 전지 모듈을 포함하는 전지 팩 |
CN114703544B (zh) | 2021-12-24 | 2023-07-14 | 北京当升材料科技股份有限公司 | 单晶型多元正极材料及其制备方法与应用 |
CN114447297B (zh) * | 2021-12-30 | 2024-03-29 | 格林美(无锡)能源材料有限公司 | 一种镍钴锰酸锂高镍单晶正极材料及其制备方法 |
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KR20140024587A (ko) * | 2012-08-20 | 2014-03-03 | 삼성에스디아이 주식회사 | 리튬 이차 전지 |
CN105164834B (zh) | 2013-07-29 | 2018-02-27 | 株式会社Lg 化学 | 能量密度提高的电极活性材料和包含其的锂二次电池 |
CN105474449B (zh) | 2014-06-26 | 2019-04-16 | 株式会社Lg 化学 | 锂二次电池 |
JP2018505521A (ja) * | 2014-12-23 | 2018-02-22 | クアンタムスケイプ コーポレイション | リチウム過剰ニッケルマンガンコバルト酸化物(lr−nmc) |
KR20170025992A (ko) | 2015-08-31 | 2017-03-08 | 삼성전자주식회사 | 복합 양극, 양극-막 조립체, 이를 포함하는 전기 화학 전지 및 양극-막 조립체 제조방법 |
KR20170063387A (ko) * | 2015-11-30 | 2017-06-08 | 주식회사 엘지화학 | 이차전지용 양극활물질, 이의 제조방법 및 이를 포함하는 이차전지 |
KR102464769B1 (ko) | 2017-07-17 | 2022-11-08 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 양극, 그 제조방법 및 이를 포함하는 리튬 이차전지 |
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2017
- 2017-07-17 KR KR1020170090244A patent/KR102464769B1/ko active Active
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- 2018-07-11 EP EP18835882.4A patent/EP3637509B1/en active Active
- 2018-07-11 WO PCT/KR2018/007877 patent/WO2019017643A2/ko unknown
- 2018-07-11 PL PL18835882.4T patent/PL3637509T3/pl unknown
- 2018-07-11 US US16/621,752 patent/US11769877B2/en active Active
- 2018-07-11 JP JP2019570980A patent/JP7045598B2/ja active Active
- 2018-07-11 CN CN201880037851.XA patent/CN110710032B/zh active Active
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WO2016175313A1 (ja) * | 2015-04-30 | 2016-11-03 | 三井金属鉱業株式会社 | 5v級スピネル型リチウムマンガン含有複合酸化物 |
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PL3637509T3 (pl) | 2022-11-28 |
WO2019017643A2 (ko) | 2019-01-24 |
WO2019017643A3 (ko) | 2019-04-11 |
JP7045598B2 (ja) | 2022-04-01 |
US11769877B2 (en) | 2023-09-26 |
EP3637509A2 (en) | 2020-04-15 |
KR20190008637A (ko) | 2019-01-25 |
EP3637509B1 (en) | 2022-09-21 |
EP3637509A4 (en) | 2020-07-15 |
US20200144618A1 (en) | 2020-05-07 |
WO2019017643A9 (ko) | 2019-05-31 |
JP2020524385A (ja) | 2020-08-13 |
CN110710032A (zh) | 2020-01-17 |
CN110710032B (zh) | 2022-05-27 |
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