KR20200067009A - 이차전지용 양극 활물질, 이의 제조 방법, 이를 포함하는 이차전지용 양극 및 리튬 이차전지 - Google Patents
이차전지용 양극 활물질, 이의 제조 방법, 이를 포함하는 이차전지용 양극 및 리튬 이차전지 Download PDFInfo
- Publication number
- KR20200067009A KR20200067009A KR1020180153838A KR20180153838A KR20200067009A KR 20200067009 A KR20200067009 A KR 20200067009A KR 1020180153838 A KR1020180153838 A KR 1020180153838A KR 20180153838 A KR20180153838 A KR 20180153838A KR 20200067009 A KR20200067009 A KR 20200067009A
- Authority
- KR
- South Korea
- Prior art keywords
- positive electrode
- secondary battery
- active material
- electrode active
- transition metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- 239000002131 composite material Substances 0.000 claims abstract description 75
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- 229910052748 manganese Inorganic materials 0.000 claims abstract description 16
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- 239000002356 single layer Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
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- 235000019698 starch Nutrition 0.000 description 1
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- 229920005608 sulfonated EPDM Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000002733 tin-carbon composite material Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000015041 whisky Nutrition 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
Description
도 2는 실시예 1의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 3은 실시예 2의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 4는 실시예 3의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 5는 실시예 4의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 6은 비교예 1의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 7은 비교예 2의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 8은 비교예 3의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 9는 비교예 4의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 10은 비교예 5의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 11은 비교예 6의 이차전지용 양극 활물질을 포함하는 리튬 이차전지에 있어서, 고온(45℃)에서 충방전 400회 실시한 이후의 양극 활물질 입자 깨짐 여부를 확인하기 위한 주사전파현미경(SEM) 사진이다.
도 12는 실시예 1의 이차전지용 양극 활물질에 있어서, 위치에 따른 도핑 원소 분포 및 함량을 EDS(Energy Dispersive Spectrometer)를 통해 분석한 그래프이다.
도 13은 비교예 4의 이차전지용 양극 활물질에 있어서, 위치에 따른 도핑 원소 분포 및 함량을 EDS를 통해 분석한 그래프이다.
| 실시예 | 비교예 | |||||||||
| 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 | 5 | 6 | |
| 입자 강도(MPa) | 226.2 | 237.3 | 218.5 | 253.4 | 114.7 | 171.7 | 182.2 | 190.1 | 183.2 | 298.2 |
| 45℃에서의 400회 사이클 용량유지율(%) |
|
| 실시예 1 | 87.7 |
| 실시예 2 | 90.4 |
| 실시예 3 | 86.2 |
| 실시예 4 | 85.3 |
| 비교예 1 | 64.2 |
| 비교예 2 | 75.9 |
| 비교예 3 | 80.2 |
| 비교예 4 | 83.9 |
| 비교예 5 | 82.4 |
| 비교예 6 | 73.8 |
Claims (16)
- 니켈(Ni) 및 코발트(Co)를 포함하고, 망간(Mn) 및 알루미늄(Al) 중 적어도 1종 이상을 포함하는 리튬 복합 전이금속 산화물 입자이며,
상기 리튬 복합 전이금속 산화물 입자는 상기 니켈(Ni)이 리튬을 제외한 전체 금속 중 60몰% 이상이고,
상기 리튬 복합 전이금속 산화물 입자에 도핑 원소가 도핑되고,
입자 강도가 210MPa 내지 290MPa인, 이차전지용 양극 활물질.
- 청구항 1에 있어서,
상기 도핑 원소는 리튬을 제외한 전체 금속에 대하여 6몰% 내지 10몰%로 도핑되는, 이차전지용 양극 활물질.
- 청구항 1에 있어서,
상기 도핑 원소는 P, B, Al, Si, W, Zr 및 Ti로 이루어진 군에서 선택된 적어도 1종을 포함하는, 이차전지용 양극 활물질.
- 청구항 1에 있어서,
상기 리튬 복합 전이금속 산화물 입자는 하기 화학식 1로 표시되는 화합물을 포함하는, 이차전지용 양극 활물질.
[화학식 1]
LipNi1-x-y-zCoxMa yMb zO2
화학식 1 중, 1.0≤p≤1.5, 0<x≤0.2, 0<y≤0.2, 0.06≤z≤0.1, 0<x+y+z≤0.4이고,
Ma은 Mn 및 Al으로 이루어지는 군으로부터 선택되는 적어도 1종이고,
Mb는 P, B, Al, Si, W, Zr 및 Ti으로 이루어지는 군으로부터 선택되는 적어도 1종이다.
- 청구항 1에 있어서,
평균 입경(D50)이 8㎛ 내지 30㎛인, 이차전지용 양극 활물질.
- 청구항 1에 있어서,
상기 도핑 원소는 상기 리튬 복합 전이금속 산화물 입자의 표면으로부터 중심까지 도핑 원소의 농도가 감소하도록 도핑되는, 이차전지용 양극 활물질.
- 청구항 1에 있어서,
상기 리튬 복합 전이금속 산화물 입자의 반직경에 대하여, 입자 중심으로부터 60% 내지 100%의 거리에 해당하는 영역에 상기 도핑 원소가 전체 도핑 원소 몰수의 70몰% 이상으로 도핑되는, 이차전지용 양극 활물질.
- 청구항 1에 있어서,
상기 리튬 복합 전이금속 산화물 입자는 EDS(Energy Dispersive Spectrometer)로 분석한 입자 표면과 입자 중심의 도핑 원소 농도를 하기 수학식 1에 대입하여 얻은 값이 0.7 내지 1인, 이차전지용 양극 활물질:
[수학식 1]
(Hs-Hc)/Hs
수학식 1 중, Hs는 상기 리튬 복합 전이금속 산화물 입자를 EDS로 분석하였을 때 입자 표면의 도핑 원소 농도이고, Hc는 상기 리튬 복합 전이금속 산화물 입자를 EDS로 분석하였을 때 입자 중심의 도핑 원소 농도이다.
- 니켈(Ni) 및 코발트(Co)를 포함하고, 망간(Mn) 및 알루미늄(Al) 중 적어도 1종 이상을 포함하며, 전체 금속 중 상기 니켈(Ni)이 60몰% 이상인 전이금속 수산화물 및 리튬 화합물을 혼합하고 1차 소성하여 리튬 복합 전이금속 산화물 입자를 제조하는 단계; 및
상기 리튬 복합 전이금속 산화물 입자와, 상기 도핑 원소를 포함하는 도핑 소스를 혼합하고 2차 소성하여 상기 도핑 원소를 상기 리튬 복합 전이금속 산화물 입자에 도핑시키는 단계를 포함하는, 청구항 1에 따른 이차전지용 양극 활물질의 제조방법.
- 청구항 9에 있어서,
상기 도핑 소스는 P, B, Al, Si, W, Zr 및 Ti로 이루어진 군에서 선택된 적어도 1종의 도핑 원소를 포함하는, 이차전지용 양극 활물질의 제조방법.
- 청구항 9에 있어서,
상기 1차 소성은 10 내지 25시간 동안 수행되는, 이차전지용 양극 활물질의 제조방법.
- 청구항 9에 있어서,
상기 1차 소성은 750 내지 1,000℃에서 수행되는, 이차전지용 양극 활물질의 제조방법.
- 청구항 9에 있어서,
상기 2차 소성은 3 내지 12시간 동안 수행되는, 이차전지용 양극 활물질의 제조방법.
- 청구항 9에 있어서,
상기 2차 소성은 700 내지 900℃에서 수행되는, 이차전지용 양극 활물질의 제조방법.
- 양극 집전체; 및
상기 양극 집전체 상에 형성된 양극 활물질층을 포함하고,
상기 양극 활물질층은 청구항 1에 따른 이차전지용 양극 활물질을 포함하는, 이차전지용 양극.
- 청구항 15에 따른 이차전지용 양극;
상기 이차전지용 양극과 대향하는 음극;
상기 이차전지용 양극과 음극 사이에 개재되는 세퍼레이터; 및
전해질을 포함하는, 리튬 이차전지.
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| KR1020180153838A KR102533811B1 (ko) | 2018-12-03 | 2018-12-03 | 이차전지용 양극 활물질, 이의 제조 방법, 이를 포함하는 이차전지용 양극 및 리튬 이차전지 |
| PCT/KR2019/016579 WO2020116858A1 (ko) | 2018-12-03 | 2019-11-28 | 이차전지용 양극 활물질, 이의 제조 방법, 이를 포함하는 이차전지용 양극 |
| JP2021530229A JP7214299B2 (ja) | 2018-12-03 | 2019-11-28 | 二次電池用正極活物質、この製造方法、これを含む二次電池用正極 |
| CN201980076406.9A CN113646930B (zh) | 2018-12-03 | 2019-11-28 | 二次电池用正极活性材料、其制备方法及包含其的二次电池正极 |
| US17/294,923 US12046750B2 (en) | 2018-12-03 | 2019-11-28 | Positive electrode active material for secondary battery, preparation method thereof, and positive electrode for secondary battery including same |
| EP19894008.2A EP3869595A4 (en) | 2019-11-28 | Positive electrode active material for rechargeable battery, production method therefor and rechargeable battery positive electrode comprising same |
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| WO2023080286A1 (ko) * | 2021-11-05 | 2023-05-11 | 주식회사 엘 앤 에프 | 이차전지용 양극 활물질 |
| WO2023132641A1 (ko) * | 2022-01-07 | 2023-07-13 | 주식회사 릴엠 | 이차전지용 집전체 및 그의 제조 방법 |
| KR20240156037A (ko) * | 2023-04-21 | 2024-10-29 | (주)포스코퓨처엠 | 리튬 이차 전지용 양극 활물질 표면부의 코팅 원소 농도 분석 방법 |
| WO2026043181A1 (ko) * | 2024-08-23 | 2026-02-26 | 주식회사 엘지화학 | 양극 활물질, 이의 제조방법, 및 이를 포함하는 양극 |
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| CN121002672A (zh) * | 2023-08-11 | 2025-11-21 | 株式会社Lg新能源 | 正极活性材料、包含其的正极和锂二次电池 |
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| WO2025165076A1 (ko) * | 2024-02-01 | 2025-08-07 | 주식회사 엘지에너지솔루션 | 리튬 이차 전지 |
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| KR20240156037A (ko) * | 2023-04-21 | 2024-10-29 | (주)포스코퓨처엠 | 리튬 이차 전지용 양극 활물질 표면부의 코팅 원소 농도 분석 방법 |
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Also Published As
| Publication number | Publication date |
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| KR102533811B1 (ko) | 2023-05-19 |
| CN113646930B (zh) | 2024-09-13 |
| CN113646930A (zh) | 2021-11-12 |
| US12046750B2 (en) | 2024-07-23 |
| JP2022510653A (ja) | 2022-01-27 |
| JP7214299B2 (ja) | 2023-01-30 |
| US20220020983A1 (en) | 2022-01-20 |
| EP3869595A1 (en) | 2021-08-25 |
| WO2020116858A1 (ko) | 2020-06-11 |
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