KR102582017B1 - 리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 - Google Patents
리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 Download PDFInfo
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Abstract
Description
도 2는 실시예 1에 따라 제조된 양극 활물질의 SEM 사진.
도 3은 도 2에 나타낸 SEM 사진의 장축 및 단축을 나타낸 사진.
도 4는 비교예 1에 따라 제조된 양극 활물질의 SEM 사진.
도 5는 비교예 2에 따라 제조된 양극 활물질의 SEM 사진.
도 6은 비교예 3에 따라 제조된 양극 활물질의 SEM 사진.
| AMT 함량(M) | AS 함량(M) | W 함량(ppm) | B 함량(ppm) | Li2SO4 함량 (ppm) | |
| 비교예 1 | - | - | - | - | - |
| 비교예 2 | - | - | - | - | 300 |
| 비교예 3 | 0.0004 | 0.04 | 200 | - | 300 |
| 실시예 1 | 0.0004 | 0.04 | 200 | 500 | 500 |
| 0.1C 충전량(mAh/g) | 0.1C 방전량(mAh/g) | 1회 효율 | 초기저항(Ω) | |
| 비교예 1 | 224.5 | 201.2 | 89.6 | 26.5 |
| 비교예 2 | 220.4 | 196.5 | 89.2 | 25.6 |
| 비교예 3 | 229.5 | 209.5 | 91.3 | 21.1 |
| 실시예 1 | 231.4 | 214.0 | 92.5 | 19.7 |
| 고온 사이클 수명(%) | 1회 저항(Ω) | 30회 저항(Ω) | 저항 증가율(%) | |
| 비교예 1 | 98.5 | 15.5 | 30.1 | 94.2 |
| 비교예 2 | 98.6 | 13.8 | 30.5 | 121.0 |
| 비교예 3 | 97.5 | 12.5 | 22.2 | 77.6 |
| 실시예 1 | 96.4 | 11.8 | 17.3 | 46.7 |
Claims (11)
- Ni 함량이 80 몰% 이상인 리튬 니켈계 화합물을 포함하는 코어; 및
상기 코어 표면의 적어도 일부에 위치하는 코팅 물질을 포함하고,
상기 코팅 물질은 5족 원소 및 6족 원소 중 어느 하나 이상, 및 S을 포함하는 제1 코팅물과, B, LiOH, Li2CO3 및 Li2SO4을 포함하는 제2 코팅물을 포함하며,
상기 제2 코팅물은 침상형 물질인 리튬 이차 전지용 양극 활물질로서,
상기 5족 원소 및 6족 원소 중 어느 하나 이상의 함량은 상기 양극 활물질 전체를 기준으로, 10ppm 내지 10000ppm인 리튬 이차 전지용 양극 활물질. - 제1항에 있어서,
상기 침상형 물질은 장축과 단축을 갖고, 장축(L1)과 단축(L2)의 길이 비율이 하기 식 1의 관계를 만족하는 것인 리튬 이차 전지용 양극 활물질.
[식 1]
0.1 < (L2/L1) < 1.00 - 제1항에 있어서,
상기 코어는 상기 리튬 니켈계 화합물을 포함하는 1차 입자의 적어도 하나가 조립된 2차 입자를 포함하는 것인 리튬 이차 전지용 양극 활물질. - 제1항에 있어서,
상기 리튬 니켈계 화합물은 하기 화학식 1로 표현되는 것인 리튬 이차 전지용 양극 활물질.
[화학식 1]
Li(Ni1-(x+y)CoxMnyXz)O2,
(상기 화학식 1에서, 0<(x+y)<0.2, 0≤x ≤0.2, 0≤ y ≤0.2 및 0 ≤ z ≤ 0.2이고,
X는 Zr, Al, Ti, B, Mg, Ce, Si, Na, Zn 중 적어도 1개 이상을 포함하는 것임) - 제3항에 있어서,
상기 제1 코팅물은 상기 1차 입자 표면의 적어도 일부와, 상기 2차 입자 표면의 적어도 일부에 위치하는 것인 리튬 이차 전지용 양극 활물질. - 제2항에 있어서,
상기 제2 코팅물은 상기 2차 입자 표면의 적어도 일부에 위치하는 것인 리튬 이차 전지용 양극 활물질. - 제1항에 있어서,
상기 5족 원소 및 6족 원소 중 어느 하나 이상은 V, Nb, W 또는 이들의 조합인 리튬 이차 전지용 양극 활물질. - 삭제
- 제1항에 있어서,
상기 LiOH의 함량은 상기 양극 활물질 전체를 기준으로, 100ppm 내지 10000ppm인 리튬 이차 전지용 양극 활물질. - 제1항에 있어서,
상기 Li2SO4의 함량은 상기 양극 활물질 전체를 기준으로, 10ppm 내지 3000ppm인 리튬 이차 전지용 양극 활물질. - 제1항 내지 제7항, 제9항 및 제10항 중 어느 한 항의 양극 활물질을 포함하는 양극;
음극; 및
비수 전해질
을 포함하는 리튬 이차 전지.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200178623A KR102582017B1 (ko) | 2020-12-18 | 2020-12-18 | 리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 |
| EP21906876.4A EP4266404A4 (en) | 2020-12-18 | 2021-11-15 | POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY CONTAINING THIS MATERIAL |
| PCT/KR2021/016664 WO2022131571A1 (ko) | 2020-12-18 | 2021-11-15 | 리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 |
| CN202180085367.6A CN116601797A (zh) | 2020-12-18 | 2021-11-15 | 锂二次电池用正极活性物质及包含该物质的锂二次电池 |
| JP2023537011A JP7682276B2 (ja) | 2020-12-18 | 2021-11-15 | リチウム二次電池用正極活物質およびこれを含むリチウム二次電池 |
| US18/268,046 US20240006594A1 (en) | 2020-12-18 | 2021-11-15 | Positive active material for rechargeable lithium battery, and rechargeable lithium battery including same |
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| KR1020200178623A KR102582017B1 (ko) | 2020-12-18 | 2020-12-18 | 리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차전지 |
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| KR20220088015A KR20220088015A (ko) | 2022-06-27 |
| KR102582017B1 true KR102582017B1 (ko) | 2023-09-21 |
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| US (1) | US20240006594A1 (ko) |
| EP (1) | EP4266404A4 (ko) |
| JP (1) | JP7682276B2 (ko) |
| KR (1) | KR102582017B1 (ko) |
| CN (1) | CN116601797A (ko) |
| WO (1) | WO2022131571A1 (ko) |
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| KR102641275B1 (ko) * | 2020-12-21 | 2024-02-27 | 포스코홀딩스 주식회사 | 양극 활물질, 이의 제조방법 및 이를 포함하는 리튬 이차 전지 |
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| JP2010040383A (ja) | 2008-08-06 | 2010-02-18 | Sony Corp | 正極活物質の製造方法および正極活物質 |
| JP6052176B2 (ja) * | 2011-08-05 | 2016-12-27 | 旭硝子株式会社 | リチウムイオン二次電池用正極活物質 |
| JP2014067508A (ja) | 2012-09-25 | 2014-04-17 | Nichia Chem Ind Ltd | 非水電解液二次電池用正極活物質、それを用いた非水電解液二次電池及び非水電解液二次電池用正極活物質の製造方法 |
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| EP3683873B1 (en) * | 2017-11-06 | 2023-04-12 | LG Energy Solution, Ltd. | Lithium secondary battery |
| KR102698845B1 (ko) * | 2017-12-27 | 2024-08-26 | 주식회사 엘지에너지솔루션 | 리튬 이차 전지용 양극 활물질, 이의 제조 방법, 이를 포함하는 양극 및 리튬 이차 전지 |
| KR102220491B1 (ko) * | 2018-09-11 | 2021-02-25 | 주식회사 포스코 | 리튬 이차 전지용 양극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지 |
| KR102177041B1 (ko) * | 2018-09-28 | 2020-11-10 | 주식회사 포스코 | 리튬 이차 전지용 양극 활물질, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지 |
| CN111056577B (zh) | 2018-10-16 | 2022-08-16 | 三星Sdi株式会社 | 基于镍的活性材料前体、其制备方法、基于镍的活性材料、和锂二次电池 |
| JP7100808B2 (ja) | 2019-02-08 | 2022-07-14 | トヨタ自動車株式会社 | リチウムイオン二次電池と活物質材料の製造方法 |
| EP3932871A4 (en) | 2019-02-27 | 2022-05-04 | Panasonic Intellectual Property Management Co., Ltd. | METHOD FOR THE PRODUCTION OF ACTIVE MATERIAL OF POSITIVE ELECTRODE FOR SECONDARY BATTERY WITH NON-AQUEOUS ELECTROLYTE |
-
2020
- 2020-12-18 KR KR1020200178623A patent/KR102582017B1/ko active Active
-
2021
- 2021-11-15 US US18/268,046 patent/US20240006594A1/en active Pending
- 2021-11-15 CN CN202180085367.6A patent/CN116601797A/zh active Pending
- 2021-11-15 WO PCT/KR2021/016664 patent/WO2022131571A1/ko not_active Ceased
- 2021-11-15 JP JP2023537011A patent/JP7682276B2/ja active Active
- 2021-11-15 EP EP21906876.4A patent/EP4266404A4/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022131571A1 (ko) | 2022-06-23 |
| EP4266404A4 (en) | 2025-01-15 |
| JP7682276B2 (ja) | 2025-05-23 |
| CN116601797A (zh) | 2023-08-15 |
| JP2024500126A (ja) | 2024-01-04 |
| KR20220088015A (ko) | 2022-06-27 |
| EP4266404A1 (en) | 2023-10-25 |
| US20240006594A1 (en) | 2024-01-04 |
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