JP2021513208A - リチウム二次電池用負極及びこれを含むリチウム二次電池 - Google Patents
リチウム二次電池用負極及びこれを含むリチウム二次電池 Download PDFInfo
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Abstract
Description
本リチウム金属層;及び
前記リチウム金属層の少なくとも一面に形成される炭素系薄膜層;を含むリチウム二次電池用負極であって、
前記炭素系薄膜層は、複数の多孔性炭素材が水平方向に一方向に整列されたリチウム二次電池用負極を提供する。
前記負極は、本発明の負極であるリチウム二次電池を提供する。
本発明は、
リチウム金属層;及び
前記リチウム金属層の少なくとも一面に形成される炭素系薄膜層;を含むリチウム二次電池用負極であって、
前記炭素系薄膜層は、複数の多孔性炭素材が水平方向に一方向に整列されたリチウム二次電池用負極に関する。
また、本発明は、正極;負極;前記正極と負極の間に介在される分離膜;及び電解質を含むリチウム二次電池に関するものであって、
前記負極は、上述した本発明の負極であってもよい。
実施例1.
直径が30nm以下の複数のカーボンナノチューブが一方向に整列され、カーボンナノチューブの間に20ないし100nmの大きさの気孔を形成する炭素系薄膜を厚さ40μmのリチウム金属板に形成させて負極を製造した。このとき、前記炭素系薄膜層の厚さは3ないし8μmで、炭素系薄膜層を構成するカーボンナノチューブは、リチウム金属板を基準にして水平に一方向に配向された構造を有している。図2に炭素系薄膜層のSEM写真を図示した。
直径が60nm以下の複数のカーボンナノチューブが放射形構造からなるカーボンナノチューブ集合体を物理気相蒸着法(PVD:Physical Vapor Deposition)で厚さ40μmのリチウム金属板に炭素系薄膜層(厚さ:18μm)を形成して負極を製造した。このとき、炭素系薄膜層は200ないし500nm大きさの気孔を含んでいて、前記気孔はカーボンナノチューブの間の空間で形成されたものである。図3に炭素系薄膜層のSEM写真を図示した。
直径が50nm以下の複数のカーボンナノチューブが放射形構造からなるカーボンナノチューブ集合体を物理気相蒸着法(PVD:Physical Vapor Deposition)で厚さ40μmのリチウム金属板に炭素系薄膜層(厚さ:30μm)を形成して負極を製造した。このとき、炭素系薄膜層は200ないし500nm大きさの気孔を含んでいて、前記気孔はカーボンナノチューブの間の空間で形成されたものである。図4に炭素系薄膜層のSEM写真を図示した。
直径が10μm以下の複数のカーボンナノチューブが放射形構造からなる炭素ナノチーブ集合体を物理気相蒸着法(PVD:Physical Vapor Deposition)で厚さ40μmのリチウム金属板に炭素系薄膜層(厚さ:100μm)を形成して負極を製造した。このとき、炭素系薄膜層は30ないし100μm大きさの気孔を含んでいて、前記気孔はカーボンナノチューブの間の空間で形成されたものである。図5に炭素系薄膜層のSEM写真を図示した。
厚さ40μmのリチウム金属板を負極で使用した。
前記実施例1及び比較例1ないし4で製造した負極を含むリチウム二次電池を製作した後、0.5mAの条件で40回充・放電した。次いで、リチウムデンドライトの形成可否を確認するために、電池から負極を分離して表面を観察した。
前記実施例1及び比較例1ないし4で製造したリチウム二次電池の寿命特性を測定した。
111:リチウム金属層
112:炭素系薄膜層
Claims (9)
- リチウム金属層;及び
前記リチウム金属層の少なくとも一面に形成される炭素系薄膜層;を含むリチウム二次電池用負極であって、
前記炭素系薄膜層は、複数の多孔性炭素材が水平方向に一方向に整列されたリチウム二次電池用負極。 - 前記炭素系薄膜層の厚さは1ないし20μmであることを特徴とする請求項1に記載のリチウム二次電池用負極。
- 前記多孔性炭素材はカーボンナノチューブまたはカーボンナノファイバーであることを特徴とする請求項1または2に記載のリチウム二次電池用負極。
- 前記多孔性炭素材の直径は10ないし1000nmであることを特徴とする請求項3に記載のリチウム二次電池用負極。
- 前記炭素系薄膜層の気孔の大きさは1ないし200nmであることを特徴とする請求項1から4のいずれか一項に記載のリチウム二次電池用負極。
- 前記炭素系薄膜層の気孔の大きさは10ないし100nmであることを特徴とする請求項5に記載のリチウム二次電池用負極。
- 前記リチウム二次電池はリチウム−硫黄電池であることを特徴とする請求項1から6のいずれか一項に記載のリチウム二次電池用負極。
- 正極;負極;前記正極と負極の間に介在される分離膜;及び電解質を含むリチウム二次電池であって、
前記負極は、請求項1ないし7のいずれか一項に記載の負極であることを特徴とするリチウム二次電池。 - 前記リチウム二次電池はリチウム−硫黄電池であることを特徴とする請求項8に記載のリチウム二次電池。
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KR1020180112863A KR102651783B1 (ko) | 2018-09-20 | 2018-09-20 | 리튬 이차전지용 음극 및 이를 포함하는 리튬 이차전지 |
KR10-2018-0112863 | 2018-09-20 | ||
PCT/KR2019/011446 WO2020060079A1 (ko) | 2018-09-20 | 2019-09-05 | 리튬 이차전지용 음극 및 이를 포함하는 리튬 이차전지 |
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CN (1) | CN111699575B (ja) |
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WO2018062844A2 (ko) * | 2016-09-30 | 2018-04-05 | 주식회사 엘지화학 | 전도성 직물로 형성된 보호층을 포함하는 리튬 이차전지용 음극 및 이를 포함하는 리튬 이차전지 |
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WO2018062844A2 (ko) * | 2016-09-30 | 2018-04-05 | 주식회사 엘지화학 | 전도성 직물로 형성된 보호층을 포함하는 리튬 이차전지용 음극 및 이를 포함하는 리튬 이차전지 |
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JP7069351B2 (ja) | 2022-05-17 |
KR102651783B1 (ko) | 2024-03-26 |
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CN111699575A (zh) | 2020-09-22 |
EP3731311B1 (en) | 2024-02-14 |
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EP3731311A4 (en) | 2021-04-28 |
EP3731311A1 (en) | 2020-10-28 |
PL3731311T3 (pl) | 2024-04-29 |
CN111699575B (zh) | 2024-02-27 |
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US20200411845A1 (en) | 2020-12-31 |
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