KR20210052006A - 리튬 이차 전지용 전해액 및 이를 포함하는 리튬 이차 전지 - Google Patents
리튬 이차 전지용 전해액 및 이를 포함하는 리튬 이차 전지 Download PDFInfo
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Abstract
Description
도 2는 실시예 1에 따른 전해액 사용 시 음극 표면에 형성되는 SEI 피막의 SEM 사진이다.
도 3은 비교예 1에 따른 전해액 사용 시 음극 표면에 형성되는 SEI 피막의 SEM 사진이다.
도 4는 합성예에 따른 첨가제 화합물에 대한 P-NMR을 나타낸 것이다.
| 초기 저항 (mΩ) |
고율 특성(%) | 상온 수명 특성 (%, @200cy) |
||||
| 0.2C | 1.0C | 2.0C | 5.0C | |||
| 실시예 1 | 19.2 | 100 | 91 | 80 | 69 | 84.8 |
| 비교예 1 | 17.5 | 100 | 89 | 75 | 58 | 79.1 |
| 비교예 2 | 18.7 | 100 | 90 | 77 | 61 | 83.9 |
| 비교예 3 | 21.4 | 100 | 91 | 78 | 63 | 91.3 |
| 초기 저항 (mΩ) |
고율 특성(%) | 상온 수명 특성 (%, @200cy) |
||||
| 0.2C | 1.0C | 2.0C | 5.0C | |||
| 실시예 1 | 19.2 | 100 | 91 | 80 | 69 | 84.8 |
| 실시예 2 | 23.7 | 100 | 87 | 72 | 51 | 80.5 |
| 실시예 3 | 18.3 | 100 | 92 | 80 | 67 | 84.0 |
| 실시예 4 | 17.8 | 100 | 90 | 78 | 59 | 82.1 |
112: 음극
113: 세퍼레이터
114: 양극
120: 전지 용기
140: 봉입 부재
Claims (15)
- 제1항에서,
상기 R1은 시아노기, 치환 또는 비치환된 C2 내지 C4 알케닐기 또는 치환 또는 비치환된 C2 내지 C4 알키닐기인, 리튬 이차 전지용 전해액. - 제1항에서,
상기 R1은 시아노기, 비닐기, 프로페닐기, 에티닐기 또는 프로피닐기인, 리튬 이차 전지용 전해액. - 제1항에서,
상기 화학식 1로 표현되는 화합물은 상기 리튬 이차 전지용 전해액 총량에 대하여 0.1 중량% 내지 10 중량%의 함량으로 포함되는 리튬 이차 전지용 전해액. - 제1항에서,
상기 화학식 1로 표현되는 화합물은 상기 리튬 이차 전지용 전해액 총량에 대하여 0.2 중량% 내지 2.0 중량%의 함량으로 포함되는 리튬 이차 전지용 전해액. - 양극 활물질을 포함하는 양극;
음극 활물질을 포함하는 음극; 및
제1항 내지 제6항 중 어느 한 항의 전해액
을 포함하는 리튬 이차 전지. - 제7항에서,
상기 양극 활물질은 코발트, 망간, 니켈 및 이들의 조합으로부터 선택되는 금속과 리튬과의 복합 산화물 중 적어도 1종을 포함하는 리튬 이차 전지. - 제7항에서,
상기 양극 활물질은 하기 화학식 4로 표현되는 것인 리튬 이차 전지:
[화학식 4]
Lix1M1 1-y1-z1M2 y1M3 z1O2
상기 화학식 4에서,
0.9≤x1≤1.8, 0≤y1≤1, 0≤z1≤1, 0≤y1+z1<1, M1, M2 및 M3은 각각 독립적으로 Ni, Co, Mn, Al, Sr, Mg 또는 La 및 이들의 조합에서 선택되는 어느 하나일 수 있다. - 제7항에서,
상기 양극 활물질은 하기 화학식 5로 표현되는 것인 리튬 이차 전지:
[화학식 5]
Lix2Niy2Coz2Al1 -y2- z2O2
상기 화학식 5에서,
1≤x2≤1.2, 0.6≤y2≤1, 및 0≤z2≤0.5 이다. - 제7항에서,
상기 음극 활물질은 Si계 활물질 및 탄소계 활물질을 포함하는 Si-C 복합체를 포함하는 리튬 이차 전지. - 제11항에서,
상기 음극 활물질은 결정질 탄소를 더 포함하는 것인 리튬 이차 전지. - 제12항에서,
상기 결정질 탄소는 흑연을 포함하고,
상기 흑연은 천연 흑연, 인조 흑연 또는 이들의 혼합물을 포함하는 것인 리튬 이차 전지. - 제11항에서,
상기 Si-C 복합체는 Si-C 복합체의 표면을 둘러싸는 쉘을 더 포함하고,
상기 쉘은 비정질 탄소를 포함하는 것인 리튬 이차 전지. - 제14항에서,
상기 비정질 탄소는 소프트 카본, 하드 카본, 메조페이스 피치 탄화물, 소성된 코크스 또는 이들의 혼합물을 포함하는 것인 리튬 이차 전지.
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| KR1020190138008A KR102764219B1 (ko) | 2019-10-31 | 2019-10-31 | 리튬 이차 전지용 전해액 및 이를 포함하는 리튬 이차 전지 |
| CN202011153536.9A CN112751080B (zh) | 2019-10-31 | 2020-10-26 | 用于可再充电锂电池的电解质和可再充电锂电池 |
| US17/081,062 US11908999B2 (en) | 2019-10-31 | 2020-10-27 | Electrolyte for rechargeable lithium battery and rechargeable lithium battery |
| HUE20204710A HUE067412T2 (hu) | 2019-10-31 | 2020-10-29 | Elektrolit újratölthetõ lítium akkumulátor számára és az ezt tartalmazó újratölthetõ lítium akkumulátor |
| EP20204710.6A EP3817121B1 (en) | 2019-10-31 | 2020-10-29 | Electrolyte for rechargeable lithium battery, and rechargeable lithium battery comprising the same |
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| KR20210052006A true KR20210052006A (ko) | 2021-05-10 |
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| EP4142007A1 (en) * | 2021-08-26 | 2023-03-01 | Samsung SDI Co., Ltd. | Rechargeable lithium battery |
| KR20230031009A (ko) * | 2021-08-26 | 2023-03-07 | 삼성에스디아이 주식회사 | 리튬 이차 전지 |
| CN115000519A (zh) * | 2022-07-21 | 2022-09-02 | 湖北亿纬动力有限公司 | 锂离子电池电解液及其制备方法和含有其的锂离子电池 |
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| SG11202000093PA (en) * | 2016-10-11 | 2020-02-27 | Grst Int Ltd | Anode slurry for lithium ion battery |
| CN108630989A (zh) * | 2017-03-16 | 2018-10-09 | 宁德时代新能源科技股份有限公司 | 电解液及锂离子电池 |
| JP6784324B2 (ja) | 2017-04-04 | 2020-11-11 | ダイキン工業株式会社 | 電解液、電気化学デバイス、リチウムイオン二次電池及びモジュール |
| KR102472907B1 (ko) * | 2017-08-16 | 2022-12-02 | 삼성에스디아이 주식회사 | 술폰계 첨가제를 포함하는 리튬이차전지 |
-
2019
- 2019-10-31 KR KR1020190138008A patent/KR102764219B1/ko active Active
-
2020
- 2020-10-26 CN CN202011153536.9A patent/CN112751080B/zh active Active
- 2020-10-27 US US17/081,062 patent/US11908999B2/en active Active
- 2020-10-29 HU HUE20204710A patent/HUE067412T2/hu unknown
- 2020-10-29 EP EP20204710.6A patent/EP3817121B1/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120109080A (ko) * | 2011-03-24 | 2012-10-08 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극, 이의 제조 방법 및 이를 포함하는 리튬 이차 전지 |
| KR20170063373A (ko) * | 2015-11-30 | 2017-06-08 | 주식회사 엘지화학 | 이차전지용 양극활물질, 이를 포함하는 이차전지용 양극 및 이차전지 |
| CN109428118A (zh) * | 2017-08-23 | 2019-03-05 | 宁德时代新能源科技股份有限公司 | 锂离子电池及其电解液 |
Also Published As
| Publication number | Publication date |
|---|---|
| US11908999B2 (en) | 2024-02-20 |
| HUE067412T2 (hu) | 2024-10-28 |
| CN112751080B (zh) | 2024-06-07 |
| EP3817121B1 (en) | 2024-03-20 |
| CN112751080A (zh) | 2021-05-04 |
| EP3817121A1 (en) | 2021-05-05 |
| US20210135287A1 (en) | 2021-05-06 |
| KR102764219B1 (ko) | 2025-02-05 |
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