KR20160037101A - 비수성 전해액 및 이를 포함하는 리튬 이차 전지 - Google Patents
비수성 전해액 및 이를 포함하는 리튬 이차 전지 Download PDFInfo
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Abstract
본 발명의 리튬 이차 전지용 비수성 전해액에 의하면, 이를 포함하는 리튬 이차 전지의 초기 충전시 음극에서 견고한 SEI 막을 형성시키고, 리튬 이차 전지의 출력 특성을 개선시킴은 물론, 고온 저장 후 출력 특성 및 용량 특성을 향상시킬 수 있다.
Description
| 고온 저장 후 특성 | |||
| 출력특성(%) | 용량특성(%) | 전지두께 증가율(%) | |
| 실시예 1 | 95.4 | 89.9 | 5.3 |
| 실시예 2 | 96.7 | 92.8 | 4.1 |
| 실시예 3 | 96.8 | 91.4 | 4.9 |
| 실시예 4 | 96.0 | 90.9 | 5.2 |
| 실시예 5 | 96.3 | 91.6 | 4.3 |
| 실시예 6 | 93.9 | 90.8 | 6.8 |
| 비교예 1 | 95.2 | 88.7 | 6.1 |
| 비교예 2 | 92.4 | 84.1 | 19.7 |
| 비교예 3 | 88.6 | 80.5 | 9.8 |
| 수명 특성(%) | ||
| 상온 수명 특성 | 고온 수명 특성 | |
| 실시예 1 | 84.9 | 81.1 |
| 실시예 2 | 88.7 | 84.8 |
| 실시예 3 | 87.4 | 83.3 |
| 실시예 4 | 85.9 | 81.7 |
| 실시예 5 | 87.1 | 84.2 |
| 실시예 6 | 82.6 | 76.5 |
| 비교예 1 | 82.1 | 78.8 |
| 비교예 2 | 77.4 | 69.9 |
| 비교예 3 | 69.1 | 61.7 |
Claims (13)
- 리튬 비스플루오로 설포닐 이미드(Lithium bis(fluorosulfonyl)imide; LiFSI) 및 플루오르화 에테르계 화합물 첨가제를 포함하는 비수성 전해액; 양극 활물질로서 리튬-니켈-망간-코발트계 산화물을 포함하는 양극; 음극; 및 분리막을 포함하는 것인 리튬 이차전지.
- 제 1 항에 있어서,
상기 리튬-니켈-망간-코발트계 산화물은 하기 화학식 1로 표시되는 산화물을 포함하는 리튬 이차전지.
[화학식 1]
Li1+x(NiaCobMnc)O2
(상기 화학식 1에서, 0.55≤a≤0.65, 0.18≤b≤0.22, 0.18≤c≤0.22, -0.2≤x≤0.2, 및 x+a+b+c+=1이다.)
- 제 1 항에 있어서,
상기 비수성 전해액은 리튬염을 더 포함하는 리튬 이차전지. - 제 3 항에 있어서,
상기 리튬염과 리튬 비스플루오로 설포닐 이미드의 혼합비는 몰비로서 1:0.01 내지 1:1인 리튬 이차전지.
- 제 1 항에 있어서,
상기 리튬 비스플루오로 설포닐 이미드는 비수성 전해액 중의 농도가 0.01 mol/ℓ 내지 2 mol/ℓ인 리튬 이차전지.
- 제 3 항에 있어서,
상기 리튬염은 LiPF6, LiAsF6, LiCF3SO3, LiN(CF3SO2)2, LiBF6, LiSbF6, LiN(C2F5SO2)2, LiAlO4, LiAlCl4, LiSO3CF3 및 LiClO4로 이루어진 군에서 선택되는 어느 하나 또는 이들 중 2종 이상의 혼합물을 포함하는 리튬 이차전지.
- 제 1 항에 있어서,
상기 플루오르화 에테르계 화합물은 디(1,1,1,2,2,3,3,4,4-노나플루오로펜틸)에테르, 디(1,1,1,2,2,3,3,4,4,5,5-운데카플루오로펜틸)에테르로 이루어진 군에서 선택되는 1종 이상인 리튬 이차전지.
- 제 1 항에 있어서,
상기 플루오르화 에테르계 화합물 첨가제의 함량은 상기 비수 전해액 총 중량을 기준으로 1~20 중량%인 리튬 이차전지.
- 제 1 항에 있어서,
상기 비수성 전해액은 비수성 유기 용매를 포함하고, 상기 비수성 유기 용매는 니트릴계 용매, 선형 카보네이트, 환형 카보네이트, 에스테르, 에테르, 케톤 또는 이들의 조합을 포함하는 리튬 이차전지.
- 제 10 항에 있어서,
상기 환형 카보네이트는 에틸렌 카보네이트(EC), 프로필렌카보네이트(PC) 및 부틸렌 카보네이트(BC)로 이루어진 군에서 선택된 어느 하나 또는 이들 중 2종 이상의 혼합물이고, 선형 카보네이트는 디메틸카보네이트(DMC), 디에틸 카보네이트(DEC), 디프로필 카보네이트(DPC), 에틸메틸카보네이트(EMC), 메틸프로필카보네이트(MPC) 및 에틸프로필 카보네이트(EPC)로 이루어진 군에서 선택된 어느 하나 또는 이들 중 2종 이상의 혼합물인 리튬 이차전지.
- 제 10 항에 있어서,
상기 니트릴계 용매는 아세토니트릴, 프로피오니트릴, 부티로니트릴, 발레로니트릴, 카프릴로니트릴, 헵탄니트릴, 싸이클로펜탄 카보니트릴, 싸이클로헥산 카보니트릴, 2-플루오로벤조니트릴, 4-플루오로벤조니트릴, 다이플루오로벤조니트릴, 트리플루오로벤조니트릴, 페닐아세토니트릴, 2-플루오로페닐아세토니트릴, 4-플루오로페닐아세토니트릴로 이루어진 군에서 선택되는 1종 이상인 리튬 이차전지.
- 제 1 항 내지 제 12 항 중 어느 한 항의 이차전지는 파우치형 리튬 이차전지인 리튬 이차전지.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/108,981 US10090560B2 (en) | 2014-09-26 | 2015-09-25 | Non-aqueous liquid electrolyte and lithium secondary battery comprising the same |
| PCT/KR2015/010239 WO2016048104A1 (ko) | 2014-09-26 | 2015-09-25 | 비수성 전해액 및 이를 포함하는 리튬 이차 전지 |
| JP2017516685A JP6671724B2 (ja) | 2014-09-26 | 2015-09-25 | 非水性電解液リチウム二次電池 |
| CN201580005363.7A CN105934848B (zh) | 2014-09-26 | 2015-09-25 | 非水电解液及包含所述非水电解液的锂二次电池 |
| EP15844297.0A EP3076473B1 (en) | 2014-09-26 | 2015-09-25 | Non-aqueous electrolyte and lithium secondary battery comprising the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20140128880 | 2014-09-26 | ||
| KR1020140128880 | 2014-09-26 |
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| Publication Number | Publication Date |
|---|---|
| KR20160037101A true KR20160037101A (ko) | 2016-04-05 |
| KR101797290B1 KR101797290B1 (ko) | 2017-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020150135260A Active KR101797290B1 (ko) | 2014-09-26 | 2015-09-24 | 비수성 전해액 및 이를 포함하는 리튬 이차 전지 |
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| Country | Link |
|---|---|
| US (1) | US10090560B2 (ko) |
| EP (1) | EP3076473B1 (ko) |
| JP (1) | JP6671724B2 (ko) |
| KR (1) | KR101797290B1 (ko) |
| CN (1) | CN105934848B (ko) |
| TW (1) | TWI580097B (ko) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200073531A (ko) * | 2018-12-14 | 2020-06-24 | 현대자동차주식회사 | 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190363396A1 (en) * | 2016-09-14 | 2019-11-28 | Nec Corporation | Lithium secondary battery |
| CN116706239A (zh) * | 2016-12-02 | 2023-09-05 | 株式会社半导体能源研究所 | 蓄电装置及电子设备 |
| CN107342438B (zh) * | 2017-06-21 | 2020-05-22 | 苏州大学 | 一种高库伦效率锂硫电池电解液及其制备方法 |
| JP7670485B2 (ja) | 2018-01-12 | 2025-04-30 | サイエンスコ エスアー | リチウムビス(フルオロスルホニル)イミドを含有する非水系電解質組成物 |
| CN118412540A (zh) * | 2018-01-25 | 2024-07-30 | 三井化学株式会社 | 电池用非水电解液及锂二次电池 |
| ES2939156T3 (es) * | 2018-09-12 | 2023-04-19 | Lg Energy Solution Ltd | Método de fabricación de un electrodo negativo para batería secundaria de litio y batería secundaria de litio |
| WO2020090678A1 (ja) | 2018-10-31 | 2020-05-07 | 株式会社Gsユアサ | 非水電解質二次電池、非水電解質二次電池の製造方法及び非水電解質二次電池の使用方法 |
| CN109449511B (zh) * | 2018-11-12 | 2021-08-17 | 中国科学院宁波材料技术与工程研究所 | 一种锂离子电池电极的保护方法 |
| KR102821821B1 (ko) * | 2019-04-30 | 2025-06-17 | 에스케이온 주식회사 | 리튬 이차 전지 |
| KR20230121111A (ko) * | 2020-12-14 | 2023-08-17 | 에스이에스 홀딩스 피티이. 엘티디. | 비플루오르화 하이브리드-에테르 공용매 시스템을 포함하는전해질, 이러한 전해질을 제조하는 방법, 및 이러한 전해질을 활용하는 전기화학 소자 |
| WO2022144947A1 (ja) * | 2020-12-28 | 2022-07-07 | TeraWatt Technology株式会社 | リチウム2次電池 |
| JP7724637B2 (ja) | 2021-05-26 | 2025-08-18 | Tdk株式会社 | リチウムイオン二次電池 |
| JP7698471B2 (ja) | 2021-05-26 | 2025-06-25 | Tdk株式会社 | リチウムイオン二次電池 |
| JP7698980B2 (ja) | 2021-05-26 | 2025-06-26 | Tdk株式会社 | リチウムイオン二次電池 |
| CN113889671B (zh) * | 2021-09-30 | 2022-12-27 | 厦门海辰储能科技股份有限公司 | 电解液和锂离子电池 |
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| WO2013191885A1 (en) * | 2012-06-19 | 2013-12-27 | Leyden Energy, Inc. | Electrolytes including fluorinated solvents for use in electrochemical cells |
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| KR20200073531A (ko) * | 2018-12-14 | 2020-06-24 | 현대자동차주식회사 | 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지 |
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| JP6671724B2 (ja) | 2020-03-25 |
| TW201633595A (zh) | 2016-09-16 |
| EP3076473A1 (en) | 2016-10-05 |
| KR101797290B1 (ko) | 2017-12-12 |
| US20160329601A1 (en) | 2016-11-10 |
| EP3076473B1 (en) | 2017-11-08 |
| TWI580097B (zh) | 2017-04-21 |
| US10090560B2 (en) | 2018-10-02 |
| JP2017532740A (ja) | 2017-11-02 |
| CN105934848A (zh) | 2016-09-07 |
| EP3076473A4 (en) | 2016-12-21 |
| CN105934848B (zh) | 2018-11-09 |
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