JP7110400B2 - リチウム-硫黄電池用電解液及びそれを含むリチウム-硫黄電池 - Google Patents
リチウム-硫黄電池用電解液及びそれを含むリチウム-硫黄電池 Download PDFInfo
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- JP7110400B2 JP7110400B2 JP2020566249A JP2020566249A JP7110400B2 JP 7110400 B2 JP7110400 B2 JP 7110400B2 JP 2020566249 A JP2020566249 A JP 2020566249A JP 2020566249 A JP2020566249 A JP 2020566249A JP 7110400 B2 JP7110400 B2 JP 7110400B2
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- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
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- H01M2300/0028—Organic electrolyte characterised by the solvent
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Description
本発明は、リチウム塩、有機溶媒及び添加剤を含むリチウム-硫黄電池用電解液であって、
前記添加剤は、一つ以上の二重結合を含むヘテロ環化合物を含み、
前記ヘテロ環は、酸素原子または硫黄原子を含むリチウム-硫黄電池用電解液を提供する。
前記負極は、リチウム系金属であり、
前記電解液は、前記本発明の電解液であるリチウム-硫黄電池を提供する。
本発明は、リチウム塩、有機溶媒及び添加剤を含むリチウム-硫黄電池用電解液であって、
前記添加剤は、一つ以上の二重結合を含むヘテロ環化合物を含み、
前記ヘテロ環は、酸素原子または硫黄原子を含むリチウム-硫黄電池用電解液に関する。
本発明は、正極;負極;前記正極と負極との間に介在される分離膜;及び電解液を含むリチウム-硫黄電池であって、
前記負極は、リチウム系金属であり、
前記電解液は、上述した本発明の電解液であるリチウム-硫黄電池に関する。
実施例1~9及び比較例1~2
硫黄をアセトニトリル中で導電材とバインダーとボールミルを使用してミキシングして正極活物質スラリーを製造した。このとき、導電材としてはカーボンブラックを、バインダーとしてはポリエチレンオキシド(分子量5,000,000g/mol)をそれぞれ用い、混合比率は重量比で硫黄:導電材:バインダーが90:5:5となるようにした。前記正極活物質スラリーをアルミニウム集電体に塗布した後、乾燥して正極を製造した。
前記実施例1~9及び比較例1~2で製造したリチウム-硫黄電池を下記の条件で充電及び放電を繰り返しながら寿命特性を測定し、その結果を表2、図1及び図2に示した。
放電:レート0.5C、電圧1.8V、CC
Claims (6)
- リチウム塩、有機溶媒及び添加剤を含むリチウム-硫黄電池用電解液であって、
前記添加剤は、一つ以上の二重結合を含むヘテロ環化合物を含み、
前記ヘテロ環化合物のヘテロ環は、酸素原子または硫黄原子を含み、
前記ヘテロ環化合物は、フラン、2-メチルフラン、3-メチルフラン、2-エチルフラン、2-プロピルフラン、2-ブチルフラン、2,3-ジメチルフラン、2,4-ジメチルフラン、2,5-ジメチルフラン、ピラン、2-メチルピラン、3-メチルピラン、4-メチルピラン、ベンゾフラン、2-(2-ニトロビニル)フラン、チオフェン、2-メチルチオフェン、2-エチルチオフェン、2-プロピルチオフェン、2-ブチルチオフェン、2,3-ジメチルチオフェン、2,4-ジメチルチオフェン及び2,5-ジメチルチオフェンからなる群より選択される1種以上を含み、
前記有機溶媒100体積比に対してヘテロ環化合物は、25以上100未満の体積比で含まれる、リチウム-硫黄電池用電解液。 - 前記添加剤は、開環重合反応により負極表面に高分子保護膜を形成させることを特徴とする、請求項1に記載のリチウム-硫黄電池用電解液。
- 前記リチウム塩は、LiCl、LiBr、LiI、LiClO4、LiBF4、LiB10Cl10、LiPF6、LiCF3SO3、LiCF3CO2、LiC4BO8、LiAsF6、LiSbF6、LiAlCl4、CH3SO3Li、CF3SO3Li、(CF3SO2)2NLi、(C2F5SO2)2NLi、(SO2F)2NLi、(CF3SO2)3CLi、クロロボランリチウム、低級脂肪族カルボン酸リチウム、4-フェニルホウ酸リチウム及びリチウムイミドからなる群より選択される1種以上を含むことを特徴とする、請求項1または2に記載のリチウム-硫黄電池用電解液。
- 前記リチウム塩は、0.1~4Mの濃度で含まれることを特徴とする、請求項1から3のいずれか一項に記載のリチウム-硫黄電池用電解液。
- 正極;負極;前記正極と負極との間に介在される分離膜;及び電解液を含むリチウム-硫黄電池であって、
前記負極は、リチウム系金属であり、
前記電解液は、請求項1から4のいずれかに記載の電解液である、リチウム-硫黄電池。 - 前記リチウム-硫黄電池の初期放電段階で電解液に含まれたヘテロ環化合物の開環重合反応によりリチウム系金属表面に高分子保護膜が形成されることを特徴とする、請求項5に記載のリチウム-硫黄電池。
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KR20180145896 | 2018-11-23 | ||
KR10-2018-0145896 | 2018-11-23 | ||
KR10-2019-0039756 | 2019-04-04 | ||
KR20190039756 | 2019-04-04 | ||
KR10-2019-0144814 | 2019-11-13 | ||
KR1020190144814A KR102126252B1 (ko) | 2018-11-23 | 2019-11-13 | 리튬-황 전지용 전해액 및 이를 포함하는 리튬-황 전지 |
PCT/KR2019/015733 WO2020105981A1 (ko) | 2018-11-23 | 2019-11-18 | 리튬-황 전지용 전해액 및 이를 포함하는 리튬-황 전지 |
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JP2002075446A (ja) | 2000-08-02 | 2002-03-15 | Samsung Sdi Co Ltd | リチウム−硫黄電池 |
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CN1412882A (zh) * | 2001-10-15 | 2003-04-23 | 三星Sdi株式会社 | 用于锂-硫电池的电解质和含有该电解质的锂-硫电池 |
US7241535B2 (en) | 2001-10-15 | 2007-07-10 | Samsung Sdi Co., Ltd. | Electrolyte for lithium-sulfur batteries and lithium-sulfur batteries comprising the same |
KR100578797B1 (ko) | 2003-10-29 | 2006-05-11 | 삼성에스디아이 주식회사 | 리튬 금속 전지용 전해액 및 이를 포함하는 리튬 금속 전지 |
US7316868B2 (en) * | 2004-02-11 | 2008-01-08 | Sion Power Corporation | Electrolytes for lithium-sulfur electrochemical cells |
DE102004018929A1 (de) | 2004-04-20 | 2005-11-17 | Degussa Ag | Elektrolytzusammensetzung sowie deren Verwendung als Elektrolytmaterial für elektrochemische Energiespeichersysteme |
US7851092B2 (en) | 2005-03-02 | 2010-12-14 | U Chicago Argonne Llc | Redox shuttles for overcharge protection of lithium batteries |
KR101018142B1 (ko) | 2007-01-17 | 2011-02-25 | 주식회사 엘지화학 | 비수 전해액 및 이를 포함하는 이차 전지 |
KR102188424B1 (ko) | 2013-12-19 | 2020-12-08 | 에스케이이노베이션 주식회사 | 리튬 이차전지 전해액 및 이를 포함하는 리튬 이차전지 |
CN104051786B (zh) | 2014-06-24 | 2016-06-15 | 东莞市凯欣电池材料有限公司 | 一种电解液及其制备方法以及一种高电压锂离子电池 |
KR101858729B1 (ko) | 2015-04-28 | 2018-05-16 | 주식회사 엘지화학 | 리튬 금속 황 화합물을 포함하는 양극 합제 및 그로부터 제조된 양극 |
US10573933B2 (en) | 2015-05-15 | 2020-02-25 | Samsung Electronics Co., Ltd. | Lithium metal battery |
US10770721B2 (en) | 2017-04-10 | 2020-09-08 | Global Graphene Group, Inc. | Lithium metal secondary battery containing anode-protecting polymer layer and manufacturing method |
CN107946644A (zh) * | 2017-11-24 | 2018-04-20 | 杨彬 | 一种环保锂电池电解液 |
CN108281659A (zh) | 2018-01-18 | 2018-07-13 | 中国计量大学 | 硫正极和锂硫电池 |
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