KR20170113385A - 리튬 이차전지용 양극활물질 및 이를 포함하는 양극 - Google Patents
리튬 이차전지용 양극활물질 및 이를 포함하는 양극 Download PDFInfo
- Publication number
- KR20170113385A KR20170113385A KR1020170040482A KR20170040482A KR20170113385A KR 20170113385 A KR20170113385 A KR 20170113385A KR 1020170040482 A KR1020170040482 A KR 1020170040482A KR 20170040482 A KR20170040482 A KR 20170040482A KR 20170113385 A KR20170113385 A KR 20170113385A
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- South Korea
- Prior art keywords
- active material
- lithium
- slab
- positive electrode
- transition metal
- Prior art date
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 76
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 239000007774 positive electrode material Substances 0.000 title claims description 27
- 239000006182 cathode active material Substances 0.000 claims abstract description 60
- 239000000203 mixture Substances 0.000 claims abstract description 24
- 239000013078 crystal Substances 0.000 claims abstract description 22
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000009831 deintercalation Methods 0.000 claims abstract description 10
- 238000009830 intercalation Methods 0.000 claims abstract description 10
- 238000002441 X-ray diffraction Methods 0.000 claims abstract description 9
- 125000002091 cationic group Chemical group 0.000 claims abstract description 8
- 238000003991 Rietveld refinement Methods 0.000 claims abstract description 6
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 229910052723 transition metal Inorganic materials 0.000 claims description 37
- 150000003624 transition metals Chemical class 0.000 claims description 35
- 239000002243 precursor Substances 0.000 claims description 31
- 150000001768 cations Chemical class 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 239000003792 electrolyte Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 7
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- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
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- C01G53/42—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2
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- C01G53/50—Complex oxides containing nickel and at least one other metal element containing alkali metals, e.g. LiNiO2 containing manganese of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2
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Abstract
Description
구분 | 전이금속 전구체 | Li/전이금속 몰비 | 소성온도(℃) |
실시예 1 | Ni0.88Co0.08Mn0.04(OH)2 | 1.03 | 800 |
실시예 2 | Ni0.88Co0.08Mn0.04(OH)2 | 1.03 | 820 |
비교예 1 | Ni0.88Co0.08Mn0.04(OH)2 | 1.03 | 780 |
비교예 2 | Ni0.88Co0.04Mn0.08(OH)2 | 1.03 | 780 |
비교예 3 | Ni0.85Co0.10Mn0.05(OH)2 | 1.01 | 800 |
비교예 4 | Ni0.85Co0.10Mn0.05(OH)2 | 1.01 | 820 |
비교예 5 | Ni0.85Co0.10Mn0.05(OH)2 | 1.02 | 800 |
비교예 6 | Ni0.85Co0.05Mn0.10(OH)2 | 1.01 | 750 |
비교예 7 | Ni0.85Co0.05Mn0.10(OH)2 | 1.01 | 800 |
비교예 8 | Ni0.60Co0.20Mn0.20(OH)2 | 1.05 | 870 |
비교예 9 | Ni0.60Co0.20Mn0.20(OH)2 | 1.05 | 880 |
비교예 10 | Ni0.60Co0.20Mn0.20(OH)2 | 1.07 | 880 |
비교예 11 | Ni0.80Co0.10Mn0.10(OH)2 | 1.03 | 750 |
비교예 12 | Ni0.80Co0.10Mn0.10(OH)2 | 1.03 | 780 |
구분 | MO-slab (Å) |
inter-slab (Å) |
inter-salb/ Mo-slab |
양이온 혼합(%) | volume(Å3) |
실시예 1 | 2.1270 | 2.6051 | 1.2248 | 0.30 | 101.4777 |
실시예 2 | 2.1262 | 2.6054 | 1.2254 | 0.36 | 101.4761 |
비교예 1 | 2.1312 | 2.6007 | 1.2203 | 0.50 | 101.4687 |
비교예 2 | 2.1388 | 2.5963 | 1.2139 | 1.20 | 101.6030 |
비교예 3 | 2.1370 | 2.5959 | 1.2147 | 1.00 | 101.4869 |
비교예 4 | 2.1360 | 2.5985 | 1.2165 | 0.07 | 101.4660 |
비교예 5 | 2.1441 | 2.5900 | 1.2080 | 0.50 | 101.4874 |
비교예 6 | 2.1382 | 2.5955 | 1.2139 | 2.40 | 101.5437 |
비교예 7 | 2.1332 | 2.5995 | 1.2186 | 1.38 | 101.6129 |
비교예 8 | 2.1305 | 2.6113 | 1.2257 | 2.30 | 101.4387 |
비교예 9 | 2.1419 | 2.5994 | 1.2136 | 1.90 | 101.4167 |
비교예 10 | 2.1363 | 2.6052 | 1.2195 | 1.00 | 101.3393 |
비교예 11 | 2.1288 | 2.6067 | 1.2245 | 1.50 | 101.5788 |
비교예 12 | 2.1296 | 2.6070 | 1.2242 | 2.20 | 101.6804 |
구분 | a | c | c/a | Z | I(003/ 104) |
I(006+102)/ (101) |
실시예 1 | 2.8730 | 14.1963 | 4.9413 | 0.24158 | 2.1242 | 0.7720 |
실시예 2 | 2.8731 | 14.1949 | 4.9406 | 0.24156 | 2.0662 | 0.7652 |
비교예 1 | 2.8729 | 14.1957 | 4.9412 | 0.24173 | 2.0811 | 0.7871 |
비교예 2 | 2.8738 | 14.2053 | 4.9430 | 0.24195 | 2.0631 | 0.7773 |
비교예 3 | 2.8729 | 14.1987 | 4.9423 | 0.24192 | 2.3408 | 0.5870 |
비교예 4 | 2.8721 | 14.2036 | 4.9454 | 0.24186 | 2.4111 | 0.5542 |
비교예 5 | 2.8725 | 14.2023 | 4.9442 | 0.24215 | 2.4365 | 0.6214 |
비교예 6 | 2.8734 | 14.2010 | 4.9442 | 0.24195 | 2.2934 | 0.5901 |
비교예 7 | 2.8747 | 14.1982 | 4.9390 | 0.24179 | 2.3215 | 0.5754 |
비교예 8 | 2.8695 | 14.2255 | 4.9412 | 0.24155 | 2.5559 | 0.6200 |
비교예 9 | 2.8693 | 14.2239 | 4.9573 | 0.24196 | 2.5007 | 0.6320 |
비교예 10 | 2.8682 | 14.2244 | 4.9593 | 0.24176 | 2.6189 | 0.5833 |
비교예 11 | 2.8734 | 14.2065 | 4.9441 | 0.24159 | 2.5099 | 0.6233 |
비교예 12 | 2.8745 | 14.2097 | 4.9434 | 0.24160 | 2.4327 | 0.6409 |
구분 | 충전 용량(mAh/g) | 방전 용량(mAh/g) | 충방전 효율(%) |
실시예 1 | 237.2 | 217.9 | 91.9 |
실시예 2 | 237.0 | 217.3 | 91.7 |
비교예 1 | 235.6 | 215.4 | 91.4 |
비교예 2 | 231.8 | 209.3 | 90.3 |
비교예 3 | 227.2 | 185.0 | 81.4 |
비교예 4 | 218.4 | 191.3 | 87.6 |
비교예 5 | 223.9 | 191.5 | 85.5 |
비교예 6 | 223.0 | 177.1 | 79.4 |
비교예 7 | 226.7 | 190.9 | 84.2 |
비교예 8 | 198.1 | 175.0 | 88.4 |
비교예 9 | 198.1 | 174.1 | 87.9 |
비교예 10 | 201.2 | 188.6 | 93.7 |
비교예 11 | 222.9 | 200.6 | 90.0 |
비교예 12 | 221.4 | 201.2 | 90.8 |
구분 | 5회 | 10회 | 20회 | 30회 | 40회 | 50회 |
실시예 1 | 99.8 | 99.5 | 99.2 | 98.6 | 98.1 | 97.7 |
실시예 2 | 99.5 | 98.7 | 98.1 | 97.3 | 96.8 | 96.2 |
비교예 1 | 99.4 | 98.4 | 97.2 | 95.8 | 94.3 | 93.6 |
비교예 2 | 99.5 | 98.5 | 97.4 | 96.1 | 93.9 | 92.7 |
비교예 3 | 99.5 | 98.4 | 97.8 | 96.5 | 93.8 | 90.8 |
비교예 4 | 99.6 | 98.8 | 97.5 | 96.7 | 94.5 | 93.2 |
비교예 5 | 99.4 | 98.4 | 98.0 | 95.9 | 94.8 | 91.5 |
비교예 6 | 99.1 | 98.5 | 97.7 | 95.3 | 91.0 | 85.8 |
비교예 7 | 99.5 | 98.6 | 97.5 | 96.4 | 95.6 | 94.1 |
비교예 8 | 99.7 | 99.3 | 98.8 | 98.3 | 97.9 | 97.6 |
비교예 9 | 99.6 | 99.2 | 98.5 | 98.0 | 97.5 | 97.2 |
비교예 10 | 99.8 | 99.2 | 99.0 | 98.4 | 98.0 | 97.8 |
비교예 11 | 98.6 | 97.1 | 95.5 | 94.6 | 94.0 | 93.6 |
비교예 12 | 98.8 | 97.4 | 96.5 | 95.6 | 94.8 | 94.3 |
Claims (16)
- 하기 화학식 1로 표시되는 리튬의 가역적인 인터칼레이션 및 디인터칼레이션이 가능한 화합물을 포함하는 리튬 이차전지용 양극활물질이며,
상기 양극활물질은 X선 회절 분석을 기초로 공간군 R-3m을 결정 구조 모델에 사용했을 때의 리트벨트법에 의한 결정 구조 해석으로부터 MO-slab의 두께가 2.1275Å 이하이고, inter-slab의 두께는 2.59Å 이상이며, Li과 Ni의 양이온 혼합 정도가 0.5% 이하인 리튬 이차전지용 양극활물질:
[화학식 1]
Lix[Nia1Cob1Mnc1]O2
상기 화학식 1에서, 1.0≤x≤1.2, 0.85≤a1≤0.99, 0<b1<0.15, 0<c1<0.15 및 a+b+c=1이다.
- 청구항 1에 있어서,
상기 MO slab 과 inter slab의 비인 inter slab/ MO slab 비는 1.2 내지 1.25인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 MO slab의 두께는 2.126Å 내지 2.1275Å인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 inter slab의 두께는 2.59Å 내지 2.615Å인 것인 리튬 이차전지용 양극활물질.
- 청구항 4에 있어서,
상기 inter slab의 두께는 2.605Å 내지 2.615Å인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 양이온 혼합 정도가 0.3% 내지 0.4%인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 양극활물질의 c축에 대한 a축의 비 (c/a)는 4.927 내지 4.948인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 양극활물질의 I(003/104)는 2.0 내지 2.2인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 양극활물질의 I(006+102)/(101)는 0.75 내지 0.79인 것인 리튬 이차전지용 양극활물질.
- 청구항 1에 있어서,
상기 양극활물질의 Z는 0.24 내지 0.242인 것인 리튬 이차전지용 양극활물질.
- 하기 화학식 2로 표시되는 전이금속 전구체와 리튬 전구체를 상기 전이금속 전구체의 전이금속의 전체 몰수에 대한 상기 리튬 전구체의 리튬의 몰수비(Li 몰수/전이금속 전체 몰수)가 1.03 이상이 되도록 혼합하여 혼합물을 제조하는 단계(단계 1); 및
상기 혼합물을 800℃ 내지 850℃의 온도로 소성하여 하기 화학식 1로 표시되는 리튬의 가역적인 인터칼레이션 및 디인터칼레이션이 가능한 화합물을 형성하는 단계(단계 2);를 포함하는 것인 리튬 이차전지용 양극활물질의 제조방법:
[화학식 1]
Lix[Nia1Cob1Mnc1]O2
[화학식 2]
[Nia2Cob2Mnc2](OH)2
상기 화학식 1 및 2에서, 1.0≤x≤1.2, 0.85≤a1≤0.99, 0<b1<0.15, 0<c1<0.15, a1+b1+c1=1, 0.85≤a2≤0.99, 0<b2<0.15, 0<c2<0.15, a2+b2+c2=1이다.
- 청구항 11에 있어서,
상기 단계 1에서 상기 전이금속 전구체의 전이금속의 전체 몰수에 대한 상기 리튬 전구체의 리튬의 몰수비(Li 몰수/전이금속 전체 몰수)가 1.03 내지 1.04인 것인 리튬 이차전지용 양극활물질의 제조방법.
- 청구항 11에 있어서,
상기 리튬 전구체는 Li2CO3, LiOH, LiOHH2O, Li2O, 및 Li2O2로 이루어진 군에서 선택된 1종 이상인 것인 리튬 이차전지용 양극활물질의 제조방법.
- 청구항 11에 있어서,
상기 단계 2를 수행하기 전에, 상기 혼합물을 500℃ 내지 600℃의 온도로 열처리를 더 수행하는 것인 리튬 이차전지용 양극활물질의 제조방법.
- 청구항 1에 따른 양극활물질을 포함하는 리튬 이차전지용 양극.
- 청구항 15에 따른 양극과,
음극활물질을 포함하는 음극;
상기 양극과 음극 사이에 개재된 분리막; 및
전해질을 포함하는 리튬 이차전지.
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CN201780003230.5A CN108140831B (zh) | 2016-03-31 | 2017-03-31 | 锂二次电池用正极活性材料和包含其的正极 |
EP17775886.9A EP3331070B1 (en) | 2016-03-31 | 2017-03-31 | Lithium secondary battery cathode active material and cathode including same |
US15/757,589 US11955629B2 (en) | 2016-03-31 | 2017-03-31 | Positive electrode active material for lithium secondary battery, and positive electrode comprising same |
PCT/KR2017/003542 WO2017171462A1 (ko) | 2016-03-31 | 2017-03-31 | 리튬 이차전지용 양극활물질 및 이를 포함하는 양극 |
US17/838,392 US20220310996A1 (en) | 2016-03-31 | 2022-06-13 | Positive Electrode Active Material For Lithium Secondary Battery, And Positive Electrode Comprising Same |
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WO2021125759A1 (ko) * | 2019-12-20 | 2021-06-24 | 주식회사 포스코 | 이차 전지 양극재 제조 방법 |
KR20220023569A (ko) * | 2020-08-21 | 2022-03-02 | 코스모신소재 주식회사 | 이차전지용 양극활물질 및 양극활물질 제조방법 |
KR20220148590A (ko) * | 2021-04-29 | 2022-11-07 | 포스코홀딩스 주식회사 | 리튬 이차 전지용 양극 활물질과 이의 제조 방법 및 리튬 이차 전지 |
KR20230081051A (ko) * | 2021-11-30 | 2023-06-07 | 코스모신소재 주식회사 | 리튬 이차 전지용 양극 활물질, 이의 제조방법 및 이를 포함하는 리튬 이차 전지 |
WO2023249416A1 (ko) * | 2022-06-21 | 2023-12-28 | 포스코홀딩스 주식회사 | 리튬 이차 전지용 양극 활물질 및 이의 제조 방법 |
KR102627508B1 (ko) * | 2022-12-07 | 2024-01-18 | 에스케이온 주식회사 | 리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차 전지 |
US12211997B2 (en) | 2018-06-20 | 2025-01-28 | Lg Chem, Ltd. | Positive electrode active material for lithium secondary battery and lithium secondary battery |
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KR102341296B1 (ko) * | 2020-03-27 | 2021-12-21 | 주식회사 에코프로비엠 | 양극 활물질 및 이를 포함하는 리튬 이차전지 |
KR20230085511A (ko) * | 2021-12-07 | 2023-06-14 | 에스케이온 주식회사 | 리튬 이차 전지용 양극 활물질 전구체, 리튬 이차 전지용 양극 활물질 및 리튬 이차 전지 |
KR20230085512A (ko) * | 2021-12-07 | 2023-06-14 | 에스케이온 주식회사 | 리튬 이차 전지용 양극 활물질 전구체, 리튬 이차 전지용 양극 활물질 및 리튬 이차 전지 |
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US12211997B2 (en) | 2018-06-20 | 2025-01-28 | Lg Chem, Ltd. | Positive electrode active material for lithium secondary battery and lithium secondary battery |
WO2021125759A1 (ko) * | 2019-12-20 | 2021-06-24 | 주식회사 포스코 | 이차 전지 양극재 제조 방법 |
KR20220023569A (ko) * | 2020-08-21 | 2022-03-02 | 코스모신소재 주식회사 | 이차전지용 양극활물질 및 양극활물질 제조방법 |
KR20220148590A (ko) * | 2021-04-29 | 2022-11-07 | 포스코홀딩스 주식회사 | 리튬 이차 전지용 양극 활물질과 이의 제조 방법 및 리튬 이차 전지 |
KR20230081051A (ko) * | 2021-11-30 | 2023-06-07 | 코스모신소재 주식회사 | 리튬 이차 전지용 양극 활물질, 이의 제조방법 및 이를 포함하는 리튬 이차 전지 |
WO2023249416A1 (ko) * | 2022-06-21 | 2023-12-28 | 포스코홀딩스 주식회사 | 리튬 이차 전지용 양극 활물질 및 이의 제조 방법 |
KR102627508B1 (ko) * | 2022-12-07 | 2024-01-18 | 에스케이온 주식회사 | 리튬 이차 전지용 양극 활물질 및 이를 포함하는 리튬 이차 전지 |
US12024441B1 (en) | 2022-12-07 | 2024-07-02 | Sk On Co., Ltd. | Cathode active material for lithium secondary battery and lithium secondary battery including the same |
Also Published As
Publication number | Publication date |
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CN108140831A (zh) | 2018-06-08 |
US11955629B2 (en) | 2024-04-09 |
US20190027748A1 (en) | 2019-01-24 |
EP3331070B1 (en) | 2019-05-15 |
CN108140831B (zh) | 2021-03-30 |
KR101992760B1 (ko) | 2019-06-26 |
EP3331070A4 (en) | 2018-07-04 |
EP3331070A1 (en) | 2018-06-06 |
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