JP7516552B2 - 全固体二次電池 - Google Patents
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Description
実施例1による正極層100に含まれる正極活物質は、LiNi0.9Co0.07Mn0.03O2(NCM)を含むものでもある。また、固体電解質として、アルジロダイト(argyrodite)型結晶体であるLiCl-Li2S-Li3PS4を含むものでもある。また、バインダとして、ポリテトラフルオロエチレン(テフロン(登録商標)バインダ(デュポン社))を含むものでもある。また、導電助剤として、炭素ナノファイバ(CNF)を含むものでもある。実施例1によれば、正極活物質:固体電解質:導電助剤:バインダ=83.8:14.8:0.2:1.2の重量比で混合し、混合物をシート形態に大きく成形し、正極シートを作製することができる。また、該正極シートを、18μm厚のアルミニウムホイルの正極集電体に圧着させ、正極層を作製することができる。
実施例2の場合、負極活物質層202に含まれた、負極活物質としての銀(Ag)と、非晶質炭素としてのカーボンブラック(CB)との混合比(質量比)が1:1であるという点を除いた残り事項は実施例1と同一である。
比較例1の場合、負極活物質層202に、別途の負極活物質なしに、非晶質炭素としてカーボンブラック(CB)だけが含まれる点を除いた残り事項は、実施例1と同一である。
比較例2の場合、負極活物質層202に含まれた、負極活物質としての銀(Ag)と、非晶質炭素としてのカーボンブラック(CB)の混合比(質量比)が25:1であるという点を除いた残り事項は、実施例1と同一である。
比較例3の場合、負極活物質層202に含まれた、負極活物質としての銀(Ag)と、黒鉛(graphite)との混合比(質量比)が1:3という点を除いた残り事項は、実施例1と同一である。
第1実施例及び第2実施例、並びに比較例1ないし比較例3によって作製された全固体二次電池の充放電特性を、次の充放電試験によって評価することができる。該充放電試験は、全固体二次電池を60℃の恒温槽に入れて遂行することができる。第1サイクルは、バッテリ電圧が4.25Vになるまで、0.62mA/cm2の定電流で充電し、電流が0.31mA/cm2になる時まで、4.25Vの定電圧充電を実施した。その後、バッテリ電圧が2.5Vになるまで、0.62mA/cm2の定電流で放電を実施した。第2サイクルは、バッテリ電圧が4.25Vになるまで、0.62mA/cm2の定電流で充電し、電流が0.31mA/cm2になるまで、4.25Vの定電圧充電を実施した。その後、バッテリ電圧が2.5Vになるまで、6.2mA/cm2の定電流で放電を実施した。
11 全固体二次電池
100 正極層
101 正極集電体
102 正極活物質層
200 負極層
201 負極集電体
202 負極活物質層
203 金属層
204 薄膜
210 負極層
211 負極集電体
212 負極活物質層
213 金属層
300 固体電解質層
Claims (14)
- 正極活物質層を含む正極層と、
負極集電体と、前記負極集電体上に配され、負極活物質と非晶質炭素とを含む負極活物質層とを含む負極層と、
前記正極活物質層と前記負極活物質層との間に配された固体電解質層と、を含み、
前記負極活物質と前記非晶質炭素との重量比は、1:3ないし1:1であり、前記負極層の表面抵抗値が0.5mΩcm以下であり、
前記負極活物質は、少なくともチタン(Ti)を含む、全固体二次電池。 - 前記負極活物質層の全体重量を基準に、前記負極活物質は、1wt%ないし50wt%の比率で含まれる、請求項1に記載の全固体二次電池。
- 前記負極活物質は、金(Au)、白金(Pt)、パラジウム(Pd)、シリコン(Si)、銀(Ag)、アルミニウム(Al)、ビズマス(Bi)、スズ(Sn)、または亜鉛(Zn)のうち少なくとも1以上をさらに含む、請求項1に記載の全固体二次電池。
- 前記非晶質炭素は、カーボンブラック(CB)、アセチレンブラック(AB)、ファーネスブラック(FB)のうち1以上を含む、請求項1に記載の全固体二次電池。
- 前記負極活物質層は、バインダをさらに含む、請求項1に記載の全固体二次電池。
- 前記バインダの含量は、前記負極活物質の総重量を基に、0.3重量%ないし15重量%である、請求項5に記載の全固体二次電池。
- 前記負極活物質層の厚みは、1μm~20μmである、請求項1に記載の全固体二次電池。
- 前記負極集電体と前記負極活物質層との間に配された金属層をさらに含み、前記金属層は、リチウムまたはリチウム合金のうち少なくとも一つを含む、請求項1に記載の全固体二次電池。
- 前記金属層は、全固体二次電池が充電される前、前記負極集電体と前記負極活物質層との間に配される、請求項8に記載の全固体二次電池。
- 前記金属層の厚みは、1μm~200μmである、請求項9に記載の全固体二次電池。
- 前記負極集電体上に、リチウムと合金を形成することができる元素を含む薄膜がさらに具備され、
前記薄膜は、前記負極集電体と前記負極活物質層との間に配される、請求項1に記載の全固体二次電池。 - 前記薄膜の厚みは、1nm~500nmである、請求項11に記載の全固体二次電池。
- 前記負極集電体、前記負極活物質層、及びそれら間の領域は、前記全固体二次電池の初期状態または放電後状態において、リチウム(Li)を含まないLiフリー領域である、請求項1に記載の全固体二次電池。
- 前記全固体二次電池は、リチウム電池である、請求項1に記載の全固体二次電池。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020200051825A KR102857425B1 (ko) | 2020-04-28 | 2020-04-28 | 전고체 이차 전지 |
| KR10-2020-0051825 | 2020-04-28 | ||
| PCT/KR2021/001147 WO2021221272A1 (ko) | 2020-04-28 | 2021-01-28 | 전고체 이차 전지 |
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| Publication Number | Publication Date |
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| JP2023524057A JP2023524057A (ja) | 2023-06-08 |
| JP7516552B2 true JP7516552B2 (ja) | 2024-07-16 |
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| US (2) | US12218358B2 (ja) |
| EP (1) | EP4145565A4 (ja) |
| JP (1) | JP7516552B2 (ja) |
| KR (1) | KR102857425B1 (ja) |
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| KR102895756B1 (ko) | 2020-10-12 | 2025-12-03 | 삼성에스디아이 주식회사 | 전고체이차전지 및 그 제조방법 |
| US20230378476A1 (en) * | 2020-11-05 | 2023-11-23 | Lg Energy Solution, Ltd. | Negative electrode including coating layer and ion transport layer, and lithium secondary battery including the same |
| KR102449415B1 (ko) * | 2022-02-04 | 2022-10-11 | (주)바이오제네시스 | 하이브리드 그래핀을 포함하는 리튬이온전지용 음극 |
| WO2024024302A1 (ja) * | 2022-07-28 | 2024-02-01 | 株式会社村田製作所 | 負極及び二次電池 |
| US20240038997A1 (en) * | 2022-07-29 | 2024-02-01 | Nissan North America, Inc. | Anode Current Collector Modification for Lithium Metal Batteries |
| WO2024063014A1 (ja) * | 2022-09-22 | 2024-03-28 | 国立研究開発法人物質・材料研究機構 | 全固体リチウムイオン二次電池およびその製造方法 |
| WO2025141751A1 (ja) * | 2023-12-27 | 2025-07-03 | 日産自動車株式会社 | リチウム二次電池 |
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| JP2016201310A (ja) | 2015-04-13 | 2016-12-01 | 株式会社日立製作所 | 全固体リチウム二次電池 |
| JP2019096610A (ja) | 2017-11-21 | 2019-06-20 | 三星電子株式会社Samsung Electronics Co.,Ltd. | 全固体二次電池およびその充電方法 |
| WO2019189311A1 (ja) | 2018-03-28 | 2019-10-03 | Tdk株式会社 | 全固体電池 |
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| KR100778450B1 (ko) * | 2006-11-22 | 2007-11-28 | 삼성에스디아이 주식회사 | 리튬 이차 전지용 음극 활물질, 이의 제조 방법 및 이를포함하는 리튬 이차 전지 |
| EP2696408B1 (en) * | 2011-05-23 | 2016-04-06 | LG Chem, Ltd. | High output lithium secondary battery having enhanced output density characteristic |
| CN104011912B (zh) * | 2011-05-23 | 2016-05-04 | 株式会社Lg化学 | 具有增强的能量密度特性的高能量密度锂二次电池 |
| KR101452029B1 (ko) * | 2011-09-20 | 2014-10-23 | 주식회사 엘지화학 | 고용량 양극활물질 및 이를 포함하는 리튬이차전지 |
| KR101495302B1 (ko) | 2012-04-13 | 2015-02-24 | 주식회사 엘지화학 | 다층구조 전극 및 그 제조방법 |
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| JP2016201310A (ja) | 2015-04-13 | 2016-12-01 | 株式会社日立製作所 | 全固体リチウム二次電池 |
| JP2019096610A (ja) | 2017-11-21 | 2019-06-20 | 三星電子株式会社Samsung Electronics Co.,Ltd. | 全固体二次電池およびその充電方法 |
| WO2019189311A1 (ja) | 2018-03-28 | 2019-10-03 | Tdk株式会社 | 全固体電池 |
| JP2019197728A (ja) | 2018-05-08 | 2019-11-14 | 日立造船株式会社 | 全固体電池およびその製造方法 |
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| WO2021221272A1 (ko) | 2021-11-04 |
| EP4145565A1 (en) | 2023-03-08 |
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| KR20210133085A (ko) | 2021-11-05 |
| EP4145565A4 (en) | 2024-10-30 |
| CN115443558A (zh) | 2022-12-06 |
| US20210336269A1 (en) | 2021-10-28 |
| US20250125371A1 (en) | 2025-04-17 |
| JP2023524057A (ja) | 2023-06-08 |
| US12218358B2 (en) | 2025-02-04 |
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