JP7175968B2 - リチウム‐硫黄電池用バインダー、これを含む正極及びリチウム‐硫黄電池 - Google Patents
リチウム‐硫黄電池用バインダー、これを含む正極及びリチウム‐硫黄電池 Download PDFInfo
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Description
また、本発明は前記正極を含むリチウム‐硫黄電池を提供する。
本明細書及び特許請求の範囲に使用された用語や単語は通常的や辞書的な意味に限定して解釈されてはならず、発明者は自分の発明を最善の方法で説明するために用語の概念を適切に定義することができる原則に基づいて本発明の技術的思想に符合する意味と概念で解釈しなければならない。
前記正極は本発明によるもので、前述した内容にしたがう。
例えば、前記非環状エーテルでは、ジメチルエーテル、ジエチルエーテル、ジプロピルエーテル、メチルエチルエーテル、メチルプロピルエーテル、エチルプロピルエーテル、エチレングリコールジメチルエーテル、エチレングリコールジエチルエーテル、エチレングリコールエチルメチルエーテル、ジエチレングリコールジメチルエーテル、ジエチレングリコールジエチルエーテル、ジエチレングリコールメチルエチルエーテル、トリエチレングリコールジメチルエーテル、トリエチレングリコールジエチルエーテル、トリエチレングリコールメチルエチルエーテル、テトラエチレングリコールジメチルエーテル、テトラエチレングリコールジエチルエーテル、テトラエチレングリコールメチルエチルエーテル、ポリエチレングリコールジメチルエーテル、ポリエチレングリコールジエチルエーテル、ポリエチレングリコールメチルエチルエーテルからなる群から選択される1種以上が使用されてもよいが、これに限定されない。
前記電池モジュールは、高温安定性、長いサイクル特性及び高い容量特性などが求められる中大型デバイスの電源で使われてもよい。
[実施例1]
反応器に硫黄4.2g、炭素ナノチューブ1.8gを均一に混合した後、155℃で30分間熱処理して硫黄‐炭素複合体を製造した。
リチウム‐硫黄電池をスタッキング(Stacking)方法によってポーチ型で製造したことを除いて、前記実施例1と同様に行ってポーチ型のリチウム‐硫黄電池を製造した。
正極スラリー組成物を製造する時、ポリビニルアルコールを使わずに、硫黄‐炭素複合体を88重量%で使用したことを除いて、前記実施例1と同様に行ってコイン型のリチウム‐硫黄電池を製造した。
正極スラリー組成物を製造する時、ポリビニルアルコールの代わりに同量のポリビニルピロリドンを使用したことを除いて、前記実施例1と同様に行ってコイン型のリチウム‐硫黄電池を製造した。
正極スラリー組成物を製造する時、ポリビニルアルコールを使わずに硫黄‐炭素複合体を88重量%で使用したことを除いて、前記実施例2と同様に行ってポーチ型のリチウム‐硫黄電池を製造した。
前記実施例及び比較例で製造された電池を充放電測定装置を利用し、コインセルの場合に初期0.1C rateで放電/充電を2.5回繰り返し、0.2C rateで充放電を3回繰り返した後、0.3C rateで充電して0.5C rateで放電するサイクルを繰り返して行い、ポーチセルの場合に初期0.05C rateで1回放電、0.1C rateで充放電3回繰り返した後、0.1C rateで充電して0.2C rateで放電するサイクルを繰り返して行い、比放電容量を測定して寿命特性を確認した。この時、得られた結果を図1及び図2に示す。
Claims (7)
- ポリアクリル酸リチウム及びポリビニルアルコールの混合物を含み、
前記ポリアクリル酸リチウムの分子量は、450,000ないし1,250,000であり、
前記ポリビニルアルコールは、粘度(4%水溶液、20℃)が3.2ないし3.6mPas、鹸化度が87ないし89mol%である、リチウム‐硫黄電池用バインダー。 - 前記リチウム‐硫黄電池用バインダー全体100重量%を基準にして
ポリアクリル酸リチウム85ないし95重量%と、
ポリビニルアルコール5ないし15重量%とを含む、請求項1に記載のリチウム‐硫黄電池用バインダー。 - 前記ポリアクリル酸リチウムとポリビニルアルコールは85:15ないし95:5の重量比で含む、請求項1または2に記載のリチウム‐硫黄電池用バインダー。
- 正極活物質と、請求項1から3のいずれか一項に記載のバインダーとを含む、リチウム‐硫黄電池用正極。
- 前記正極は、導電材及びバインダーの中から選択される1種以上をさらに含む、請求項4に記載のリチウム‐硫黄電池用正極。
- 前記正極活物質は、無機硫黄(S8)、Li2Sn(n≧1)、ジスルフィド化合物、有機硫黄化合物及び炭素‐硫黄ポリマー((C2Sx)n、x=2.5ないし50、n≧2)からなる群から選択される1種以上を含む、請求項4または5に記載のリチウム‐硫黄電池用正極。
- 請求項4から6のいずれか一項に記載の正極を含むリチウム‐硫黄電池。
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KR1020170180625A KR102328257B1 (ko) | 2017-12-27 | 2017-12-27 | 리튬-황 전지용 바인더, 이를 포함하는 양극 및 리튬-황 전지 |
KR10-2017-0180625 | 2017-12-27 | ||
PCT/KR2018/016212 WO2019132394A1 (ko) | 2017-12-27 | 2018-12-19 | 리튬-황 전지용 바인더, 이를 포함하는 양극 및 리튬-황 전지 |
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US (1) | US11038177B2 (ja) |
EP (1) | EP3664200B1 (ja) |
JP (1) | JP7175968B2 (ja) |
KR (1) | KR102328257B1 (ja) |
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WO2021091174A1 (ko) | 2019-11-06 | 2021-05-14 | 주식회사 엘지에너지솔루션 | 리튬 이차전지 전극용 바인더, 이를 포함하는 리튬 이차전지용 양극 및 리튬 이차전지 |
KR20210054989A (ko) | 2019-11-06 | 2021-05-14 | 주식회사 엘지에너지솔루션 | 리튬 이차전지 전극용 바인더, 이를 포함하는 리튬 이차전지용 양극 및 리튬 이차전지 |
CN112447961B (zh) * | 2020-12-12 | 2021-11-09 | 安徽嘉誉伟丰机电科技股份有限公司 | 一种高比容量的锂电池正极材料的制备方法 |
WO2022230835A1 (ja) * | 2021-04-28 | 2022-11-03 | 株式会社Gsユアサ | 非水電解質蓄電素子 |
WO2023090398A1 (ja) * | 2021-11-18 | 2023-05-25 | 東亞合成株式会社 | リチウム硫黄二次電池用の電極合剤層形成用組成物、リチウム硫黄二次電池用電極及びリチウム硫黄二次電池 |
CN114300682B (zh) * | 2021-11-29 | 2024-03-08 | 浙江清华柔性电子技术研究院 | 一种自修复阻燃粘结剂及其制备方法和应用 |
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JP2012064574A (ja) | 2010-09-17 | 2012-03-29 | Samsung Sdi Co Ltd | リチウム2次電池用バインダー組成物、およびそれを含むリチウム2次電池用電極およびリチウム2次電池 |
WO2013141195A1 (ja) | 2012-03-19 | 2013-09-26 | 国立大学法人横浜国立大学 | アルカリ金属-硫黄系二次電池 |
JP2013225496A (ja) | 2012-03-19 | 2013-10-31 | Yokohama National Univ | アルカリ金属−硫黄系二次電池 |
JP2014041811A (ja) | 2012-03-19 | 2014-03-06 | Yokohama National Univ | アルカリ金属−硫黄系二次電池 |
JP2015053152A (ja) | 2013-09-06 | 2015-03-19 | 日立マクセル株式会社 | 非水電解液二次電池 |
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KR102328257B1 (ko) | 2021-11-18 |
EP3664200B1 (en) | 2024-02-14 |
US11038177B2 (en) | 2021-06-15 |
CN111386621A (zh) | 2020-07-07 |
EP3664200A1 (en) | 2020-06-10 |
US20200287219A1 (en) | 2020-09-10 |
KR20190078882A (ko) | 2019-07-05 |
CN111386621B (zh) | 2023-05-02 |
WO2019132394A1 (ko) | 2019-07-04 |
EP3664200A4 (en) | 2020-11-25 |
JP2020532847A (ja) | 2020-11-12 |
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