KR102581269B1 - 양극 활물질, 이를 포함하는 양극 및 리튬 이차전지 - Google Patents
양극 활물질, 이를 포함하는 양극 및 리튬 이차전지 Download PDFInfo
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Abstract
Description
결정자 크기(nm) | 변형률 (%) | 결정자 종횡비 (a/c) | |
실시예 1 | 124.2 | 0.097 | 2.41 |
실시예 2 | 132.2 | 0.095 | 2.13 |
실시예 3 | 137.2 | 0.086 | 1.82 |
실시예 4 | 151.6 | 0.072 | 1.31 |
비교예 1 | 114 | 0.101 | 1.04 |
비교예 2 | 148 | 0.102 | 2.75 |
충전용량 (mAh/g) |
방전용량 (mAh/g) |
효율 (%) |
초기 저항 (Ω) |
50사이클 수명 특성 (%) |
|
실시예 1 | 227.6 | 202.8 | 89.1 | 21.1 | 94.2 |
실시예 2 | 228.5 | 203.7 | 89.1 | 20.4 | 95.6 |
실시예 3 | 230.1 | 204.1 | 88.7 | 18.7 | 96.3 |
실시예 4 | 229.3 | 203.1 | 88.5 | 20.6 | 95.1 |
비교예 1 | 221.5 | 197.4 | 89.1 | 35.2 | 92.5 |
비교예 2 | 218.0 | 197.2 | 90.5 | 51.1 | 88.4 |
Claims (12)
- 리튬을 제외한 전이금속 전체 몰수에 대하여 60몰% 이상의 니켈을 포함하며, 1차 입자가 응집한 2차 입자의 형태인 리튬 전이금속 산화물을 포함하고,
상기 리튬 전이금속 산화물은 하기 화학식 1로 표시되는 것이며,
하기 식 (1)의 조건을 만족하는 것인 양극 활물질.
[화학식 1]
Li1+xNiyCozM1 wM2 eO2
상기 화학식 1에서,
M1은 Mn, Al 또는 이들의 조합이며, M2는 B, Al, Zr, Y, Mo, Cr, V, W, Ta 및 Nb로 이루어진 군에서 적어도 어느 하나이고, -0.1≤x≤0.2, 0.6≤y<1.0, 0<z<0.4, 0<w<0.4, 0≤e≤0.1이고,
식 (1) -0.021x + 4.0 ≤ y ≤ -0.021x + 5.5
상기 식 (1)에서,
x는 상기 양극 활물질의 결정자 크기(단위: nm)이고,
y는 상기 양극 활물질의 결정자의 종횡비로 상기 양극 활물질을 X-선 회절분석하여 얻어진 XRD 데이터에 나타나는 각각의 피크의 반가폭(full width at half-maximum, FWHM)을 하기 식(2)에 적용한 후, 최소제곱근사법을 통해 얻어진 단축 길이 c에 대한 장축 길이 a의 비율이며, 1.3 ≤ y ≤ 2.5이고,
식 (2):
상기 식 (2)에서, d(hkl)은 해당 피크에서의 반가폭, h, k, l은 해당 피크의 결정면에서의 밀러 지수, k는 쉐러 상수, θ는 브래그 각도(bragg angle), λ는 X-선 파장, a는 결정자의 장축 길이, c는 결정자의 단축 길이임.
- 제1항에 있어서,
상기 식 (1)에서, 100 ≤ x ≤ 180인 양극 활물질.
- 제1항에 있어서,
상기 식 (1)에서, 120 ≤ x ≤ 160인 양극 활물질.
- 삭제
- 삭제
- 제1항에 있어서,
상기 결정자 크기 x는, 상기 양극 활물질을 X-선 회절분석하여 얻어진 XRD 데이터에 나타나는 모든 피크의 반가폭(full width at half-maximum, FWHM)을 Caglioti equation으로 피팅(fitting)하여 측정된 값인 양극 활물질.
- 삭제
- 삭제
- 제1항에 있어서,
상기 화학식 1에서, M1이 Mn 또는 Mn및 Al의 조합이고,
0.85≤y<1.0, 0<z<0.15, 0<w<0.15, 0≤e≤0.05인 양극 활물질.
- 제1항에 있어서,
상기 리튬 전이금속 산화물 표면에 코팅층을 더 포함하는 양극 활물질.
- 제1항에 따른 양극 활물질을 포함하는 리튬 이차전지용 양극.
- 제11항에 따른 리튬 이차전지용 양극을 포함하는 리튬 이차전지.
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US (1) | US12322797B2 (ko) |
EP (1) | EP4030505A4 (ko) |
JP (1) | JP7386988B2 (ko) |
KR (1) | KR102581269B1 (ko) |
CN (1) | CN114555529B (ko) |
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KR102787045B1 (ko) | 2022-03-22 | 2025-03-25 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 양극 활물질 및 이의 제조 방법과 이를 포함하는 리튬 이차 전지 |
JP2025517532A (ja) * | 2022-05-27 | 2025-06-05 | ノヴォニクス・バッテリー・テクノロジー・ソリューションズ・インコーポレイテッド | リチウムニッケルマンガンコバルト酸化物粒子を調製する方法 |
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CN107359334B (zh) * | 2017-07-11 | 2020-06-19 | 贵州振华新材料有限公司 | 球形或类球形锂离子电池正极材料及锂离子电池 |
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KR102332342B1 (ko) * | 2017-09-19 | 2021-11-30 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 양극 활물질, 이의 제조방법, 이를 포함하는 리튬 이차전지용 양극 및 리튬 이차전지 |
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CN109817955B (zh) | 2019-03-29 | 2020-09-29 | 郑州中科新兴产业技术研究院 | 非水电解质二次电池用高镍正极材料及其制备方法 |
JPWO2022209506A1 (ko) * | 2021-03-31 | 2022-10-06 |
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US20230142182A1 (en) | 2023-05-11 |
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