KR102164007B1 - 리튬 이차 전지 - Google Patents
리튬 이차 전지 Download PDFInfo
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- KR102164007B1 KR102164007B1 KR1020140041457A KR20140041457A KR102164007B1 KR 102164007 B1 KR102164007 B1 KR 102164007B1 KR 1020140041457 A KR1020140041457 A KR 1020140041457A KR 20140041457 A KR20140041457 A KR 20140041457A KR 102164007 B1 KR102164007 B1 KR 102164007B1
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Abstract
[화학식 1]
LiaNixCoyMnzO2
(상기 화학식 1에서, a, x, y 및 z는 각각 명세서에 정의된 바와 같다.)
Description
| 양극 활물질 조성 | 전해액 첨가제 조성 | |
| 실시예 1 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 0.5 중량부 |
| 실시예 2 | LiNi0.5Co0.2Mn0.3O2 80 중량% 및 LiMnO2 20 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 0.5 중량부 |
| 실시예 3 | LiNi0.5Co0.2Mn0.3O2 100 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 0.5 중량부 |
| 실시예 4 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 1 중량부 |
| 실시예 5 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 3 중량부 |
| 비교예 1 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | LiPO2F2 1 중량부 |
| 비교예 2 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | 비닐렌 카보네이트 0.5 중량부 |
| 비교예 3 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | LiPO2F2 0.5 중량부 및 비닐렌 카보네이트 4 중량부 |
| 비교예 4 | LiNi0.5Co0.2Mn0.3O2 90 중량% 및 LiMnO2 10 중량% | LiPO2F2 3 중량부 및 비닐렌 카보네이트 0.3 중량부 |
| 참고예 1 | LiNi0.5Co0.2Mn0.3O2 50 중량% 및 LiMnO2 50 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 0.5 중량부 |
| 참고예 2 | LiNi0.5Co0.2Mn0.3O2 40 중량% 및 LiMnO2 60 중량% | LiPO2F2 1 중량부 및 비닐렌 카보네이트 0.5 중량부 |
| 초기용량 대비 300사이클시 용량비율(%) | 초기저항 대비 300사이클시 저항비율(%) | 초기용량 대비 60℃ 30일 방치시 용량비율(%) | 초기저항 대비 60℃ 30일 방치시 저항비율(%) | |
| 실시예 1 | 97.1 | 95.5 | 90.2 | 110 |
| 실시예 2 | 96.9 | 94.8 | 88.8 | 111 |
| 실시예 3 | 97.2 | 95.7 | 91.1 | 109 |
| 실시예 4 | 97.3 | 96.2 | 89 | 112 |
| 실시예 5 | 96.7 | 99.8 | 87.8 | 117 |
| 비교예 1 | 92.8 | 95.7 | 87.9 | 89 |
| 비교예 2 | 96.9 | 107.2 | 91 | 144 |
| 비교예 3 | 96.6 | 102.1 | 83.5 | 148 |
| 비교예 4 | 95.8 | 94.9 | 83.4 | 112 |
| 참고예 1 | 95.3 | 97.2 | 84.3 | 108 |
| 참고예 2 | 95.8 | 98.3 | 82.1 | 107 |
| 초기용량 대비 500사이클시 용량비율(%) | 초기저항 대비 500사이클시 저항비율(%) | 초기용량 대비 60℃ 60일 방치시 용량비율(%) | 초기저항 대비 60℃ 60일 방치시 저항비율(%) | |
| 실시예 1 | 94.2 | 103.1 | 88.4 | 114 |
| 실시예 2 | 93.9 | 103.3 | 87.1 | 113 |
| 실시예 3 | 93.4 | 104.3 | 89.7 | 111 |
| 실시예 4 | 94.3 | 104.6 | 88.6 | 118 |
| 실시예 5 | 94.1 | 107 | 87.8 | 127 |
| 비교예 1 | 90.1 | 103.3 | 85.1 | 102 |
| 비교예 2 | 91.4 | 110.5 | 86.3 | 146 |
| 비교예 3 | 92.3 | 112.1 | 82.3 | 156 |
| 비교예 4 | 91.2 | 105.3 | 84.4 | 115 |
| 참고예 1 | 90.8 | 108.2 | 80.2 | 113 |
| 참고예 2 | 90.7 | 107.8 | 79.6 | 114 |
112: 음극
113: 세퍼레이터
114: 양극
120: 전지 용기
140: 봉입 부재
Claims (9)
- 양극 활물질을 포함하는 양극;
음극; 및
리튬염, 유기용매 및 첨가제를 포함하는 전해액을 포함하고,
상기 양극 활물질은 하기 화학식 1로 표시되는 화합물 80 내지 99 중량% 및 하기 화학식 2로 표시되는 화합물 1 내지 20 중량%를 포함하고,
상기 첨가제는 상기 유기용매 100 중량부에 대하여 리튬 디플루오로포스페이트(LiPO2F2) 0.5 내지 2 중량부 및 비닐렌 카보네이트 0.5 내지 3 중량부를 포함하는 리튬 이차 전지.
[화학식 1]
LiaNixCoyMnzO2
(상기 화학식 1에서,
0≤a≤2, 0.2≤x≤0.6, 0.2≤y≤0.6, 0.2<z≤0.6, x+y+z=1 이다.)
[화학식 2]
LiMnO2 - 삭제
- 삭제
- 제1항에 있어서,
상기 리튬 디플루오로포스페이트는 상기 유기용매 100 중량부에 대하여 1 내지 1.5 중량부로 포함되는 리튬 이차 전지. - 제1항에 있어서,
상기 비닐렌 카보네이트는 상기 유기용매 100 중량부에 대하여 0.5 내지 1 중량부로 포함되는 리튬 이차 전지. - 제1항에 있어서,
상기 비닐렌 카보네이트 및 상기 리튬 디플루오로포스페이트의 중량비는 1:1 내지 1:3 인 리튬 이차 전지. - 제1항에 있어서,
상기 리튬염은 LiPF6, LiBF4, LiSbF6, LiAsF6, LiC4F9SO3, LiClO4, LiAlO2, LiAlCl4, LiN(CxF2x+1SO2)(CyF2y+1SO2)(여기서, x 및 y는 자연수임), LiCl, LiI, LiB(C2O4)2(lithium bis(oxalato) borate, LiBOB) 또는 이들의 조합을 포함하는 리튬 이차 전지. - 제1항에 있어서,
상기 유기용매는 에틸렌 카보네이트, 프로필렌 카보네이트, 부틸렌 카보네이트, 디메틸 카보네이트, 디에틸 카보네이트, 디프로필 카보네이트, 메틸프로필 카보네이트, 에틸프로필 카보네이트, 메틸에틸 카보네이트, 아세테이트, 메틸아세테이트, n-프로필아세테이트, 디메틸술폭사이드, 아세토니트릴, 디메톡시에탄, 디에톡시에탄, 술포란, 감마-부티로락톤, 에틸렌 술파이트, 프로필렌 술파이트, 테트라하이드로 퓨란, 메틸 프로피오네이트, 에틸 프로피오네이트, 프로필 프로피오네이트, 데카놀라이드(decanolide), 발레로락톤, 메발로노락톤(mevalonolactone), 카프로락톤(caprolactone), 디부틸에테르, 테트라글라임, 디글라임, 2-메틸테트라히드로퓨란, 테트라히드로퓨란, 사이클로헥사논, 에틸알코올, 이소프로필 알코올 또는 이들의 조합을 포함하는 리튬 이차 전지. - 제1항에 있어서,
상기 첨가제는 비닐에틸렌 카보네이트, 플루오로에틸렌 카보네이트 또는 이들의 조합을 더 포함하는 리튬 이차 전지.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020140041457A KR102164007B1 (ko) | 2014-04-07 | 2014-04-07 | 리튬 이차 전지 |
| US14/630,603 US9768471B2 (en) | 2014-04-07 | 2015-02-24 | Rechargeable lithium battery |
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| KR102810119B1 (ko) | 2015-11-13 | 2025-05-19 | 시온 파워 코퍼레이션 | 전기화학 전지용 첨가제 |
| CN106920992A (zh) * | 2015-12-27 | 2017-07-04 | 深圳市沃特玛电池有限公司 | 一种高倍率容量型动力电池电解液 |
| TWI633692B (zh) | 2016-03-31 | 2018-08-21 | 烏明克公司 | 供汽車應用的鋰離子電池組 |
| CN108123172B (zh) * | 2016-11-29 | 2020-08-28 | 宁德时代新能源科技股份有限公司 | 电解液及二次锂电池 |
| KR102664549B1 (ko) | 2017-05-19 | 2024-05-09 | 시온 파워 코퍼레이션 | 전기화학 전지용 부동태화제 |
| US10868306B2 (en) | 2017-05-19 | 2020-12-15 | Sion Power Corporation | Passivating agents for electrochemical cells |
| WO2019025980A1 (en) * | 2017-07-31 | 2019-02-07 | Tesla Motors Canada ULC | NEW BATTERY SYSTEMS BASED ON LITHIUM DIFLUOROPHOSPHATE |
| US11961959B2 (en) | 2017-07-31 | 2024-04-16 | Tesla, Inc. | Battery systems based on lithium difluorophosphate |
| US20190036171A1 (en) | 2017-07-31 | 2019-01-31 | Tesla Motors Canada ULC | Novel battery systems based on two-additive electrolyte systems |
| JP2019125538A (ja) * | 2018-01-19 | 2019-07-25 | 株式会社日立製作所 | 負極、半二次電池、二次電池 |
| 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 |
| KR102807564B1 (ko) * | 2020-06-05 | 2025-05-13 | 닝더 엠프렉스 테크놀로지 리미티드 | 전기화학 디바이스 및 전자 디바이스 |
| US20220399574A1 (en) * | 2021-06-15 | 2022-12-15 | GM Global Technology Operations LLC | Electrolyte for lithium metal batteries |
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| US20090286155A1 (en) | 2006-08-22 | 2009-11-19 | Mitsubishi Chemical Corporation | Lithium difluorophosphate, electrolyte containing lithium difluorophosphate, process for producing lithium difluorophosphate, process for producing nonaqueous electrolyte, nonaqueous electrolyte, and nonaqueous electrolyte secondary battery containing the same |
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| US9093702B2 (en) * | 2009-09-03 | 2015-07-28 | Samsung Sdi Co., Ltd. | Electrolytic solution for lithium battery, lithium battery employing the same and method for operating the lithium battery |
| JP2011124123A (ja) | 2009-12-11 | 2011-06-23 | Sony Corp | 二次電池、二次電池用電解液、電動工具、電気自動車および電力貯蔵システム |
| JP2011134547A (ja) | 2009-12-24 | 2011-07-07 | Fuji Heavy Ind Ltd | リチウムイオン二次電池 |
| WO2012108505A1 (ja) * | 2011-02-10 | 2012-08-16 | 三菱化学株式会社 | 二次電池用非水系電解液及びそれを用いた非水系電解液二次電池 |
| CN105576282B (zh) * | 2011-02-10 | 2018-11-06 | 三菱化学株式会社 | 非水电解液及使用该非水电解液的非水电解质二次电池 |
| KR102030347B1 (ko) * | 2012-06-19 | 2019-11-18 | 에스케이이노베이션 주식회사 | 첨가제를 포함하는 리튬 이차 전지용 전해질 및 이를 포함하는 리튬 이차 전지 |
-
2014
- 2014-04-07 KR KR1020140041457A patent/KR102164007B1/ko active Active
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| Publication number | Publication date |
|---|---|
| US20150288033A1 (en) | 2015-10-08 |
| US9768471B2 (en) | 2017-09-19 |
| KR20150116330A (ko) | 2015-10-15 |
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