KR102259216B1 - 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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- KR102259216B1 KR102259216B1 KR1020180058397A KR20180058397A KR102259216B1 KR 102259216 B1 KR102259216 B1 KR 102259216B1 KR 1020180058397 A KR1020180058397 A KR 1020180058397A KR 20180058397 A KR20180058397 A KR 20180058397A KR 102259216 B1 KR102259216 B1 KR 102259216B1
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- South Korea
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- unsubstituted
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- electrolyte
- secondary battery
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- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
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Abstract
Description
도 2는 리튬 이차 전지의 사이클에 따른 25℃ 방전 용량 유지율을 나타낸 그래프이다.
도 3은 리튬 이차 전지의 사이클에 따른 0℃ 방전 용량 유지율을 나타낸 그래프이다.
초기 직류 저항 (mOhm) |
20일 고온 보관 후 직류 저항 (mOhm) |
|
비교예 1 | 20.3 | 25.9 |
실시예 1 | 19.9 | 24.9 |
초기 직류 저항 (mOhm) |
20일 고온 보관 후 직류 저항 (mOhm) |
|
비교예 2 | 19.5 | 30.7 |
실시예 2 | 19.0 | 28.9 |
실시예 3 | 18.8 | 28.4 |
실시예 4 | 18.9 | 27.4 |
실시예 5 | 19.0 | 27.1 |
CID OPEN TIME (hr) (@90℃) |
|
비교예 1 | 20.4 |
실시예 1 | 21.3 |
112: 음극
113: 세퍼레이터
114: 양극
120: 전지 용기
140: 봉입 부재
Claims (9)
- 비수성 유기 용매, 리튬염 및 첨가제를 포함하고,
상기 첨가제는 하기 화학식 1로 표현되는 화합물을 포함하는 리튬 이차 전지용 전해액:
[화학식 1]
상기 화학식 1에서,
R1 내지 R6은 각각 독립적으로 수소, 치환 또는 비치환된 C1 내지 C10 알킬기, 치환 또는 비치환된 C1 내지 C10 알콕시기, 치환 또는 비치환된 C2 내지 C10 알케닐기, 치환 또는 비치환된 C2 내지 C10 알키닐기, 치환 또는 비치환된 C3 내지 C10 사이클로알킬기, 또는 치환 또는 비치환된 C3 내지 C10 사이클로알케닐기이고,
n은 1 내지 10의 정수 중 하나이다. - 제2항에서,
상기 R1 및 R2는 각각 독립적으로 치환 또는 비치환된 C1 내지 C4 알킬기, 또는 치환 또는 비치환된 C2 내지 C4 알케닐기인 리튬 이차 전지용 전해액. - 제2항에서,
상기 R1 및 R2는 각각 독립적으로 할로겐기 또는 시아노기로 치환되거나 비치환된 C1 내지 C4 알킬기, 또는 할로겐기 또는 시아노기로 치환되거나 비치환된 C2 내지 C4 알케닐기인 리튬 이차 전지용 전해액. - 제1항에서,
상기 R1 및 R2는 각각 독립적으로 메틸기, 에틸기 또는 비닐기이고,
상기 R3 내지 R6은 각각 독립적으로 치환 또는 비치환된 C1 내지 C5 알킬기인 리튬 이차 전지용 전해액. - 제1항에서,
상기 화학식 1로 표현되는 화합물은 상기 리튬 이차 전지용 전해액 총량에 대하여 0.05 중량% 내지 2 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 1 중량%의 함량으로 포함되는 리튬 이차 전지용 전해액. - 제1항에서,
상기 첨가제는 상기 화학식 1로 표현되는 화합물인 리튬 이차 전지용 전해액. - 양극;
음극; 및
제1항 내지 제8항 중 어느 한 항의 전해액
을 포함하는 리튬 이차 전지.
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