JP7064068B2 - 安全性が向上したリチウム金属二次電池及びそれを含む電池モジュール - Google Patents
安全性が向上したリチウム金属二次電池及びそれを含む電池モジュール Download PDFInfo
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Description
0.002Mのリチウムポリスルフィド(ジメトキシエタン(DME)中のLi2S8 0.002M)溶液に、λ-カラギーナン高分子を投入した。
ポリフッ化ビニリデン-ヘキサフルオロプロピレン(PVDF-co-HFP)高分子と酸化アルミニウム(Al2O3)とプロピレンカーボネート(PC)とを1:4:1の重量比で混合した後、ジメチルアセトアミド(DMAC)に入れて均一に撹拌した溶液を、ドクターブレードを用いてガラス板に150μmの厚さでキャスティングした。これを常温で真空乾燥してDMACを揮発させた後、蒸留水槽に入れてPCを除去した。そして、製造したフィルムを60℃で2日間真空乾燥することで残っている水を完全に除去し、独立した保護層(厚さ約30μm)を製造した。
ポリフッ化ビニリデン-ヘキサフルオロプロピレン(PVDF-co-HFP)高分子と酸化アルミニウム(Al2O3)とプロピレンカーボネート(PC)とを1:4:1の重量比で混合した後、ジメチルアセトアミド(DMAC)に入れて均一に撹拌した溶液を、ドクターブレードを用いてガラス板に150μmの厚さでキャスティングした。これを常温で真空乾燥してDMACを揮発させた後、蒸留水槽に入れてPCを除去した。そして、製造したフィルムを60℃で2日間真空乾燥することで残っている水を完全に除去し、独立した保護層基材を製造した。乾燥後に得られた保護層基材の厚さは約30μmであり、気孔度は約40%であった。次いで、製造例で製造した硫黄鎖基を有するカラギーナン高分子を0.2重量%の濃度で水に溶解した溶液に、上記のように製造した高分子フィルムをディップコーティングして、硫黄鎖基を有するカラギーナン高分子が導入された保護層を製造した。最終的に得られた保護層は、厚さが約30μmであった。
硫黄鎖基を有するカラギーナン高分子を保護層に導入するとき、硫黄鎖基を有するカラギーナン高分子を0.4重量%の濃度で水に溶解した溶液に保護層をディップコーティングすることを除き、実施例1と同じ方法でリチウム対称セルを製造した。
硫黄鎖基を有するカラギーナン高分子を保護層に導入するとき、硫黄鎖基を有するカラギーナン高分子を0.6重量%の濃度で水に溶解した溶液に保護層をディップコーティングすることを除き、実施例1と同じ方法でリチウム対称セルを製造した。
硫黄鎖基を有するカラギーナン高分子を保護層に導入するとき、硫黄鎖基を有するカラギーナン高分子を0.8重量%の濃度で水に溶解した溶液に保護層をディップコーティングすることを除き、実施例1と同じ方法でリチウム対称セルを製造した。
硫黄鎖基を有するカラギーナン高分子を保護層に導入するとき、硫黄鎖基を有するカラギーナン高分子を1.0重量%の濃度で水に溶解した溶液に保護層をディップコーティングすることを除き、実施例1と同じ方法でリチウム対称セルを製造した。
まず、セルの駆動条件は、初サイクルのみ0.1mA/cm2の電流密度でそれぞれ10時間ずつ充電及び放電を行い、その後は1mA/cm2の電流密度でそれぞれ1時間ずつ充電及び放電を行った。
Claims (9)
- 正極、負極、及び前記正極と前記負極との間に介在されたセパレータを備える電極組立体と、
前記電極組立体を含浸させる非水電解液と、を含むリチウム金属二次電池であって、
前記負極がリチウム金属を含み、
前記リチウム金属二次電池は、前記負極と前記セパレータとの間に介在された保護層を含み、
前記保護層が、硫黄鎖基を有する高分子を含み、
前記保護層の気孔度が5vol%~95vol%である、リチウム金属二次電池。 - 前記硫黄鎖基を有する高分子が、硫酸基(SO4 2-)を有する高分子とリチウムポリスルフィド(Li2Sn、0<n<10)との反応生成物である、請求項1に記載のリチウム金属二次電池。
- 前記硫酸基(SO4 2-)を有する高分子がカラギーナン高分子を含む、請求項2に記載のリチウム金属二次電池。
- 前記カラギーナン高分子がλ-カラギーナンを含む、請求項3に記載のリチウム金属二次電池。
- 前記保護層が、保護層基材として、多孔性高分子層または無機物が混合された多孔性混合層を含み、前記硫黄鎖基を有する高分子が、前記保護層基材に導入された、請求項1から4のいずれか一項に記載のリチウム金属二次電池。
- 前記非水電解液がLiNO3を添加剤としてさらに含む、請求項1から5のいずれか一項に記載のリチウム金属二次電池。
- 前記保護層の厚さが0.1μm~100μmである、請求項1から6のいずれか一項に記載のリチウム金属二次電池。
- 前記保護層が保護層基材を含み、前記保護層基材がビニリデン重合単位を含むポリビニリデン系高分子樹脂を含む、請求項1から4のいずれか一項に記載のリチウム金属二次電池。
- 前記保護層が無機物粒子をさらに含み、前記無機物粒子がBaTiO3、SrTiO3、SnO2、CeO2、MgO、NiO、CaO、ZnO、ZrO2、Y2O3、Al2O3、TiO2、SiC、またはこれらのうち二つ以上を含む、請求項8に記載のリチウム金属二次電池。
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| KR10-2018-0053846 | 2018-05-10 | ||
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| PCT/KR2019/005667 WO2019216713A1 (ko) | 2018-05-10 | 2019-05-10 | 안전성이 향상된 리튬 금속 이차전지 및 그를 포함하는 전지모듈 |
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| KR102322714B1 (ko) * | 2019-02-01 | 2021-11-08 | 주식회사 엘지에너지솔루션 | 절연층이 형성되어 있는 전극을 포함하는 스택형 전극조립체 및 이를 포함하는 리튬 이차전지 |
| KR102390657B1 (ko) | 2019-02-01 | 2022-04-26 | 주식회사 엘지에너지솔루션 | 절연필름을 포함하는 전극 조립체, 이의 제조방법, 및 이를 포함하는 리튬 이차전지 |
| JP2022091637A (ja) * | 2020-12-09 | 2022-06-21 | 株式会社Gsユアサ | 非水電解質蓄電素子用の負極、非水電解質蓄電素子、及びそれらの製造方法 |
| CA3210805A1 (en) * | 2021-03-15 | 2022-09-22 | Simon PARK | Method of manufacturing anode electrode for lithium metal battery using irradiation of photoelectromagnetic energy and anode electrode for lithium metal battery |
| KR20220151327A (ko) | 2021-05-06 | 2022-11-15 | 현대자동차주식회사 | 인-도핑된 흑연질 탄소 질화물로 이루어진 계면층을 포함하는 리튬이차전지용 음극, 이를 포함하는 리튬이차전지 및 이의 제조방법 |
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| CN118402128A (zh) * | 2021-12-24 | 2024-07-26 | 松下知识产权经营株式会社 | 二次电池用分隔件和其制造方法以及二次电池 |
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| KR102806351B1 (ko) * | 2022-06-13 | 2025-05-09 | 인천대학교 산학협력단 | 람다 카라기난 기반의 고분자를 포함하는 수성 실리콘 음극용 바인더, 이를 포함하는 실리콘 음극 및 이를 포함하는 리튬 이차전지 |
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| CN106848384A (zh) * | 2017-03-10 | 2017-06-13 | 合肥中航新能源技术研究院有限责任公司 | 一种高能量密度长寿命的锂硫动力电池 |
| KR102582050B1 (ko) * | 2019-07-16 | 2023-09-21 | 주식회사 엘지에너지솔루션 | 리튬 금속 음극 및 이를 포함하는 리튬 금속 전지 |
-
2019
- 2019-05-10 KR KR1020190055203A patent/KR102292727B1/ko active Active
- 2019-05-10 PL PL19800698.3T patent/PL3694042T3/pl unknown
- 2019-05-10 ES ES19800698T patent/ES2960888T3/es active Active
- 2019-05-10 EP EP19800698.3A patent/EP3694042B1/en active Active
- 2019-05-10 JP JP2020524479A patent/JP7064068B2/ja active Active
- 2019-05-10 HU HUE19800698A patent/HUE064162T2/hu unknown
- 2019-05-10 WO PCT/KR2019/005667 patent/WO2019216713A1/ko not_active Ceased
- 2019-05-10 US US16/756,683 patent/US11450894B2/en active Active
- 2019-05-10 CN CN201980005585.7A patent/CN111328435B/zh active Active
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| EP3694042B1 (en) | 2023-09-13 |
| KR20190129767A (ko) | 2019-11-20 |
| ES2960888T3 (es) | 2024-03-07 |
| PL3694042T3 (pl) | 2024-01-29 |
| HUE064162T2 (hu) | 2024-02-28 |
| EP3694042A1 (en) | 2020-08-12 |
| KR102292727B1 (ko) | 2021-08-23 |
| CN111328435A (zh) | 2020-06-23 |
| EP3694042A4 (en) | 2021-04-07 |
| WO2019216713A1 (ko) | 2019-11-14 |
| JP2021501456A (ja) | 2021-01-14 |
| US11450894B2 (en) | 2022-09-20 |
| CN111328435B (zh) | 2023-07-14 |
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