KR20130003583A - 리튬이차전지용 전해액 첨가제, 이를 포함하는 비수성 전해액 및 리튬이차전지 - Google Patents
리튬이차전지용 전해액 첨가제, 이를 포함하는 비수성 전해액 및 리튬이차전지 Download PDFInfo
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- KR20130003583A KR20130003583A KR1020110065021A KR20110065021A KR20130003583A KR 20130003583 A KR20130003583 A KR 20130003583A KR 1020110065021 A KR1020110065021 A KR 1020110065021A KR 20110065021 A KR20110065021 A KR 20110065021A KR 20130003583 A KR20130003583 A KR 20130003583A
- Authority
- KR
- South Korea
- Prior art keywords
- group
- unsubstituted
- substituted
- lithium secondary
- positive electrode
- Prior art date
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- Ceased
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- 239000000654 additive Substances 0.000 title claims abstract description 29
- 230000000996 additive effect Effects 0.000 title claims abstract description 28
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- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 125000004093 cyano group Chemical group *C#N 0.000 claims abstract description 18
- 239000007774 positive electrode material Substances 0.000 claims abstract description 18
- 238000009830 intercalation Methods 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 13
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- 239000011255 nonaqueous electrolyte Substances 0.000 claims description 35
- 239000007773 negative electrode material Substances 0.000 claims description 14
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Images
Classifications
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- C07C255/09—Carboxylic acid nitriles having cyano groups bound to acyclic carbon atoms of an acyclic and unsaturated carbon skeleton containing at least two cyano groups bound to the carbon skeleton
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Abstract
Description
도 2는 실험예 1~3과 비교실험예 1~2에 대한 60℃에서의 고온 저장 후의 내부저항 및 커패시턴스 유지율을 측정한 결과를 나타내는 그래프이다.
도 3은 실험예 1~3과 비교실험예 1~2에 대한 45℃에서의 300사이클 후의 내부저항 및 용량 유지율을 측정한 결과를 나타내는 그래프이다.
구분 | 실험예 1 | 실험예 2 | 비교실험예1 | 비교실험예2 |
첨가제 | 디시아노 에틸렌 (0.1 wt%) |
1,2-디시아노-3,3 -디메틸에텐 (0.1 wt%) |
숙신니트릴 (3 wt%) | 무첨가 |
104: 양극 활물질층 110: 음극
112: 전류 집전체 114: 음극 활물질층
120: 세퍼레이터 130: 비수성 전해액
Claims (9)
- 불포화 결합 및 상기 불포화 결합 탄소의 시스 또는 트랜스 위치에 결합한 2개 이상의 시아노기를 포함하는 하기 화학식 1로 표현되는 디시아노 불포화 화합물 또는 디시아노아세틸렌을 포함하는 리튬이차전지용 비수성 전해액 첨가제.
[화학식 1]
상기 화학식 1에서,
R1 및 R2는 각각 동일하거나 상이하며, 각각 독립적으로 수소, 아민기, 시아노기, 티올레이트기, 치환 또는 비치환된 C1 내지 C15의 알킬기, 알콕시기(-OR3), 실릴기(-SiR4R5R6), 실록시기(-OSiR7R8R9), 설파이드기(-SR10), 술폭시드기(-SOR11), 보릴기(-BR12R13) 및 보리닉산기(borinic acid)(-OBR14R15)로 이루어진 군에서 선택되거나,
R1 및 R2가 함께 결합하여 치환 또는 비치환된 C3 내지 C15의 사이클로알킬기, 치환 또는 비치환된 C3 내지 C15의 헤테로사이클로알킬기 및 치환 또는 비치환된 C2 내지 C20의 헤테로아릴기로 이루어진 군에서 선택된 어느 하나를 형성하고,
R3 내지 R15는 각각 동일하거나 상이하며, 치환 또는 비치환된 C1 내지 C12의 알킬기, 치환 또는 비치환된 C3 내지 C15의 사이클로알킬기, 치환 또는 비치환된 C3 내지 C15의 헤테로사이클로알킬기, 치환 또는 비치환된 C6 내지 C20의 아릴기 및 치환 또는 비치환된 C2 내지 C20의 헤테로아릴기로 이루어진 군에서 선택된다. - 제1 항에 있어서, 상기 비수성 전해액 첨가제는 상기 첨가제가 사용되는 리튬이차전지의 양극으로부터 용출된 금속 이온과 5환 고리 착물을 형성하는 비수성 전해액 첨가제.
- 비수성 유기용매와 상기 비수성 유기용매에 용해되어 있는 리튬염을 포함하는 기본전해액; 및
불포화 결합 및 상기 불포화 결합 탄소의 시스 또는 트랜스 위치에 결합한 2개 이상의 시아노기를 포함하는 하기 화학식 1로 표현되는 디시아노 화합물 또는 디시아노아세틸렌을 포함하는 리튬이차전지용 비수성 전해액 첨가제를 포함하는 리튬이차전지용 비수성 전해액.
[화학식 1]
상기 화학식 1에서,
R1 및 R2는 각각 동일하거나 상이하며, 각각 독립적으로 수소, 아민기, 시아노기, 티올레이트기, 치환 또는 비치환된 C1 내지 C15의 알킬기, 알콕시기(-OR3), 실릴기(-SiR4R5R6), 실록시기(-OSiR7R8R9), 설파이드기(-SR10), 술폭시드기(-SOR11), 보릴기(-BR12R13) 및 보리닉산기(borinic acid)(-OBR14R15)로 이루어진 군에서 선택되거나,
R1 및 R2가 함께 결합하여 치환 또는 비치환된 C3 내지 C15의 사이클로알킬기, 치환 또는 비치환된 C3 내지 C15의 헤테로사이클로알킬기 및 치환 또는 비치환된 C2 내지 C20의 헤테로아릴기로 이루어진 군에서 선택된 어느 하나를 형성하고,
R3 내지 R15는 각각 동일하거나 상이하며, 치환 또는 비치환된 C1 내지 C15의 알킬기, 치환 또는 비치환된 C3 내지 C15의 사이클로알킬기, 치환 또는 비치환된 C3 내지 C15의 헤테로사이클로알킬기, 치환 또는 비치환된 C6 내지 C20의 아릴기 및 치환 또는 비치환된 C2 내지 C20의 헤테로아릴기로 이루어진 군에서 선택된다. - 제3 항에 있어서, 상기 비수성 전해액 첨가제는 상기 비수성 전해액이 사용되는 리튬이차전지의 양극으로부터 용출된 금속 이온과 5환 고리 착물을 형성하는 비수성 전해액.
- 제3 항에 있어서, 상기 비수성 전해액 첨가제는 상기 기본 전해액에 대해 0.01~20 중량%로 함유된 비수성 전해액.
- 리튬을 인터칼레이션 및 디인터칼레이션할 수 있는 양극 활물질층을 포함하는 양극;
상기 리튬을 인터칼레이션 및 디인터칼레이션할 수 있는 음극 활물질층을 포함하는 음극;
상기 양극과 음극 사이의 세퍼레이터; 및
제3 항 내지 제5 항 중 어느 한 항의 비수성 전해액을 포함하는 리튬이차전지. - 제6 항에 있어서, 상기 양극 활물질은 LiaA1 - bRbD2(상기 식에서, 0.90 ≤ a ≤ 1.8 및 0 ≤ b ≤ 0.5이다); LiaE1 - bRbO2 - cDc(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 및 0 ≤ c ≤ 0.05이다); LiE2 - bRbO4 - cDc(상기 식에서, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05이다); LiaNi1 -b-cCobRcDα(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05 및 0 < α ≤ 2이다); LiaNi1 -b- cCobRcO2 -αZα(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05 및 0 < α < 2이다); LiaNi1 -b- cCobRcO2 -αZ2(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05 및 0 < α < 2이다); LiaNi1 -b- cMnbRcDα(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05 및 0 < α ≤ 2이다); LiaNi1 -b- cMnbRcO2 -αZα(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05 및 0 < α < 2이다); LiaNi1 -b- cMnbRcO2 -αZ2(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.5, 0 ≤ c ≤ 0.05 및 0 < α < 2이다); LiaNibEcGdO2(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5 및 0.001 ≤ d ≤ 0.1이다.); LiaNibCocMndGeO2(상기 식에서, 0.90 ≤ a ≤ 1.8, 0 ≤ b ≤ 0.9, 0 ≤ c ≤ 0.5, 0 ≤ d ≤0.5 및 0.001 ≤ e ≤ 0.1이다.); LiaNiGbO2(상기 식에서, 0.90 ≤ a ≤ 1.8 및 0.001 ≤ b ≤ 0.1이다.); LiaCoGbO2(상기 식에서, 0.90 ≤ a ≤ 1.8 및 0.001 ≤ b ≤ 0.1이다.); LiaMnGbO2(상기 식에서, 0.90 ≤ a ≤ 1.8 및 0.001 ≤ b ≤ 0.1이다.); LiaMn2GbO4(상기 식에서, 0.90 ≤ a ≤ 1.8 및 0.001 ≤ b ≤ 0.1이다.); QO2; QS2; LiQS2; V2O5; LiV2O5; LiTO2; LiNiVO4; Li(3-f)J2(PO4)3(0 ≤ f ≤ 2); Li(3-f)Fe2(PO4)3(0 ≤ f ≤ 2); LiFePO4 또는 이들의 조합으로 이루어진 군에서 선택되며,
A는 Ni, Co, Mn 또는 이들의 조합이고; R은 Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, 희토류 원소 또는 이들의 조합이고; D는 O, F, S, P 또는 이들의 조합이고; E는 Co, Mn 또는 이들의 조합이고; Z는 F, S, P 또는 이들의 조합이고; G는 Al, Cr, Mn, Fe, Mg, La, Ce, Sr, V 또는 이들의 조합이고; Q는 Ti, Mo, Mn 또는 이들의 조합이고; T는 Cr, V, Fe, Sc, Y 또는 이들의 조합이고; J는 V, Cr, Mn, Co, Ni, Cu 또는 이들의 조합인 리튬이차전지. - 리튬을 인터칼레이션 및 디인터칼레이션할 수 있는 양극 활물질층을 포함하는 양극;
상기 리튬을 인터칼레이션 및 디인터칼레이션할 수 있는 음극 활물질층을 포함하는 음극;
상기 양극과 음극 사이의 세퍼레이터;및
상기 양극의 표면에 결합하거나 상기 양극 활물질로부터 용출된 금속 이온과 착물을 형성하며, 불포화 결합 및 상기 불포화 결합 탄소의 시스 또는 트랜스 위치에 결합한 2개 이상의 시아노기를 포함하는 하기 화학식 1로 표현되는 디시아노 불포화 화합물 또는 디시아노아세틸렌을 포함하는 리튬이차전지.
[화학식 1]
상기 화학식 1에서,
R1 및 R2는 각각 동일하거나 상이하며, 각각 독립적으로 수소, 아민기, 시아노기, 티올레이트기, 치환 또는 비치환된 C1 내지 C12의 알킬기, 알콕시기(-OR3), 실릴기(-SiR4R5R6), 실록시기(-OSiR7R8R9), 설파이드기(-SR10), 술폭시드기(-SOR11), 보릴기(-BR12R13) 및 보리닉산기(borinic acid)(-OBR14R15)로 이루어진 군에서 선택되거나,
R1 및 R2가 함께 결합하여 치환 또는 비치환된 C3 내지 C15의 사이클로알킬기, 치환 또는 비치환된 C3 내지 C15의 헤테로사이클로알킬기 및 치환 또는 비치환된 C3 내지 C20의 헤테로아릴기로 이루어진 군에서 선택된 어느 하나를 형성하고,
R3 내지 R15는 각각 동일하거나 상이하며, 치환 또는 비치환된 C1 내지 C12의 알킬기, 치환 또는 비치환된 C3 내지 C15의 사이클로알킬기, 치환 또는 비치환된 C3 내지 C15의 헤테로사이클로알킬기, 치환 또는 비치환된 C6 내지 C20의 아릴기 및 치환 또는 비치환된 C2 내지 C20의 헤테로아릴기로 이루어진 군에서 선택된다. - 제8 항에 있어서, 상기 착물은 5환 고리 착물인 리튬이차전지.
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US13/358,528 US20130004861A1 (en) | 2011-06-30 | 2012-01-26 | Electrolyte additive for lithium secondary battery, non-aqueous electrolyte, and lithium secondary battery including the same |
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- 2011-06-30 KR KR1020110065021A patent/KR20130003583A/ko not_active Ceased
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2012
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WO2015083861A1 (ko) * | 2013-12-06 | 2015-06-11 | 에스케이이노베이션 주식회사 | 리튬 이차전지용 전해액 및 이를 포함하는 리튬 이차전지 |
US9548515B2 (en) | 2013-12-06 | 2017-01-17 | Sk Innovation Co., Ltd. | Electrolyte for lithium secondary battery and lithium secondary battery comprising same |
KR101535071B1 (ko) * | 2014-05-26 | 2015-07-10 | 충남대학교산학협력단 | 리튬이차전지용 전해액 |
WO2021261886A1 (ko) * | 2020-06-22 | 2021-12-30 | 주식회사 엘지에너지솔루션 | 리튬 이차 전지용 비수 전해질 및 이를 포함하는 리튬 이차 전지 |
WO2023008922A1 (ko) * | 2021-07-29 | 2023-02-02 | 주식회사 엘지에너지솔루션 | 비수 전해액, 및 이를 포함하는 리튬 이차전지 |
KR20230018342A (ko) * | 2021-07-29 | 2023-02-07 | 주식회사 엘지에너지솔루션 | 비수 전해액, 및 이를 포함하는 리튬 이차전지 |
CN114883649A (zh) * | 2022-06-17 | 2022-08-09 | 珠海冠宇电池股份有限公司 | 一种电解液及包括该电解液的电池 |
CN114883649B (zh) * | 2022-06-17 | 2025-07-04 | 珠海冠宇电池股份有限公司 | 一种电解液及包括该电解液的电池 |
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