KR102159243B1 - 리튬 이차 전지용 양극활물질 - Google Patents
리튬 이차 전지용 양극활물질 Download PDFInfo
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Abstract
본 발명에 따른 양극활물질 전구체, 및 이를 이용하여 제조된 리튬 이차 전지용 양극활물질은 입자에서의 코발트 함량을 일정 범위로 조절함으로써, 리튬 이차 전지의 최적 용량을 증가시킬 뿐만 아니라 안정성을 개선시킴으로써 수명 특성을 향상시킬 수 있다.
Description
도 3 내지 도 6은 본 발명의 일 실시예 및 비교예의 양극활물질을 포함하는 전지의 특성을 측정한 결과를 나타낸다.
Charge Capacity (mAh/g) |
Discharge Capacity (mAh/g) | Efficiency (%) | C-rate Retention (%) (5C/0.1C) |
EIS (Ohm) |
Cycle Retention (%) (50 Cyc) |
비고 Co 조성 |
|
비교예 | 241.1 | 218.1 | 90.5% | 77.8 | 44.7 | 91.1 | 3 % |
실시예 1 | 238.3 | 220.8 | 92.7% | 80.4 | 28.4 | 95.1 | 5 % |
실시예 2 | 244.5 | 229.8 | 94.8% | 82.1 | 16.7 | 94.6 | 9 % |
실시예 3 | 242.0 | 227.6 | 94.0% | 82.0 | 18.4 | 95.0 | 12 % |
Claims (6)
- 코어부, 및 상기 코어부를 둘러싸는 쉘부로 이루어지고,
상기 코어부 및 쉘부에서의 코발트 총 함량이 5 내지 12 몰% 이고,
상기 코어부 및 쉘부에서의 입자 전체에서의 코발트의 총 함량을 W몰이라고 할 때, 상기 코어부를 제외한 쉘부에서의 코발트의 함량은 0.2W몰 내지 1.0W몰이고,
상기 쉘부에서의 코발트의 함량이 상기 코어부에서의 코발트의 함량보다 더 많고,
상기 쉘부에서의 코발트의 함량이 10 몰% 초과이고,
상기 쉘부에서의 망간의 함량이 20몰% 미만이고,
상기 양극활물질의 입자 전체 직경을 D라고 할 때, D는 1 내지 25μm이고, 코어부를 제외한 쉘부의 두께는 0.01D 내지 0.3D이고,
입자 전체에서의 코발트 총 함량을 5 내지 12몰%로 조절하면서, 이에 따라 코어부를 제외한 쉘부의 두께가 입자 전체 직경 D대비 0.01 내지 0.3D로 조절되는,
리튬이차전지용 양극활물질.
- 제 1 항에 있어서,
아래 화학식 1로 표시되는 리튬이차전지용 양극활물질.
[화학식 1] LiaNixCoyMnzM1-x-y-zO2
(상기 화학식 1 에서 0.9≤a≤1.3, 0.7≤x<1.0, 0.05≤y≤0.12, 0.0≤z≤0.3, 0.0≤1-x-y-z≤0.3 이고,
M은 B, Ba, Ce, Cr, F, Mg, Al, Cr, V, Ti, Fe, Zr, Zn, Si, Y, Nb, Ga, Sn, Mo, W, P, Sr, Ge, Cu, 및 이로부터 선택되는 1종의 이상의 원소임).
- 삭제
- 삭제
- 코어부 및 쉘부로 이루어지는 전구체를 제조하는 단계;
상기 제조된 전구체에 리튬 화합물을 첨가하여 1차 열처리하는 단계;
상기 열처리된 화합물을 수세하는 단계; 및
상기 수세된 화합물을 건조시키는 단계;를 포함하고,
상기 코어부 및 쉘부로 이루어지는 전구체를 제조하는 단계에서 상기 코어부 및 쉘부에서의 코발트 총 함량은 5 내지 12 몰% 이고, 상기 코어부 및 쉘부에서의 코발트의 함량을 W 라고 할 때, 상기 코어부를 제외한 쉘부에서의 코발트의 함량은 0.2W 내지 1.0W 인,
제 1 항의 리튬이차전지용 양극활물질 제조방법.
- 제 5 항에 있어서,
상기 1차 열처리하는 단계 이후 및 수세하는 단계 이전에, 알루미늄을 포함하는 화합물을 혼합하여 2차 열처리하는 단계;를 더 포함하는,
제 1 항의 리튬이차전지용 양극활물질 제조방법.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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US16/198,457 US11258055B2 (en) | 2017-11-22 | 2018-11-21 | Cathode active material of lithium secondary battery |
JP2018217946A JP2019096612A (ja) | 2017-11-22 | 2018-11-21 | リチウム二次電池用正極活物質 |
EP18207876.6A EP3489198A1 (en) | 2017-11-22 | 2018-11-22 | Cathode active material of lithium secondary battery |
CN201811397643.9A CN109935801B (zh) | 2017-11-22 | 2018-11-22 | 锂二次电池用阳极活性物质 |
CN202211182624.0A CN115579468A (zh) | 2017-11-22 | 2018-11-22 | 锂二次电池用阳极活性物质 |
JP2020201942A JP7414702B2 (ja) | 2017-11-22 | 2020-12-04 | リチウム二次電池用正極活物質 |
US17/647,705 US11677065B2 (en) | 2017-11-22 | 2022-01-11 | Cathode active material of lithium secondary battery |
JP2023223236A JP2024026613A (ja) | 2017-11-22 | 2023-12-28 | リチウム二次電池用正極活物質 |
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KR20170156847 | 2017-11-22 |
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JP6855752B2 (ja) * | 2016-10-31 | 2021-04-07 | 住友金属鉱山株式会社 | ニッケルマンガン複合水酸化物とその製造方法、非水系電解質二次電池用正極活物質とその製造方法、および非水系電解質二次電池 |
KR102159243B1 (ko) * | 2017-11-22 | 2020-09-23 | 주식회사 에코프로비엠 | 리튬 이차 전지용 양극활물질 |
KR20210111950A (ko) | 2020-03-03 | 2021-09-14 | 삼성에스디아이 주식회사 | 전고체 이차전지용 양극 및 이를 포함하는 전고체이차전지 |
KR20210111951A (ko) | 2020-03-03 | 2021-09-14 | 삼성에스디아이 주식회사 | 전고체이차전지용 양극 및 이를 포함하는 전고체이차전지 |
KR102339704B1 (ko) * | 2020-06-18 | 2021-12-15 | 주식회사 에코프로비엠 | 양극 활물질 및 이를 포함하는 리튬 이차전지 |
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US10930922B2 (en) * | 2011-01-05 | 2021-02-23 | Industry-University Cooperation Foundation Hanyang University | Positive electrode active material and secondary battery comprising the same |
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KR20130138073A (ko) * | 2012-06-08 | 2013-12-18 | 한양대학교 산학협력단 | 리튬 이차 전지용 양극활물질 전구체, 이를 이용하여 제조된 양극활물질 및 이를 포함하는 리튬 이차 전지 |
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US20160006025A1 (en) * | 2013-02-28 | 2016-01-07 | Iucf-Hyu(Industry- University Cooperation Foundation Hanyang University) | Cathode active material for lithium secondary battery |
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KR101568263B1 (ko) * | 2014-08-07 | 2015-11-11 | 주식회사 에코프로 | 리튬 이차 전지용 양극활물질 및 이를 포함하는 리튬 이차 전지 |
WO2016038983A1 (ja) | 2014-09-10 | 2016-03-17 | 日立金属株式会社 | リチウムイオン二次電池用正極活物質、リチウムイオン二次電池用正極及びリチウムイオン二次電池 |
KR101555594B1 (ko) * | 2014-10-02 | 2015-10-06 | 주식회사 에코프로 | 리튬 이차 전지용 양극활물질 및 이를 포함하는 리튬 이차 전지 |
KR102460961B1 (ko) * | 2015-11-06 | 2022-10-31 | 삼성에스디아이 주식회사 | 리튬이차전지용 양극 활물질, 그 제조방법 및 이를 포함한 양극을 구비한 리튬이차전지 |
US20180183046A1 (en) * | 2016-12-28 | 2018-06-28 | Lg Chem, Ltd. | Positive electrode active material for lithium secondary battery, method for preparing the same, and lithium secondary battery including the same |
KR102159243B1 (ko) * | 2017-11-22 | 2020-09-23 | 주식회사 에코프로비엠 | 리튬 이차 전지용 양극활물질 |
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US20220140315A1 (en) | 2022-05-05 |
JP7414702B2 (ja) | 2024-01-16 |
CN109935801A (zh) | 2019-06-25 |
CN115579468A (zh) | 2023-01-06 |
CN109935801B (zh) | 2022-10-28 |
JP2019096612A (ja) | 2019-06-20 |
KR20190059198A (ko) | 2019-05-30 |
US11677065B2 (en) | 2023-06-13 |
JP2024026613A (ja) | 2024-02-28 |
JP2021048137A (ja) | 2021-03-25 |
US20190157660A1 (en) | 2019-05-23 |
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