JP7150012B2 - リチウム電極及びこれを含むリチウム二次電池 - Google Patents
リチウム電極及びこれを含むリチウム二次電池 Download PDFInfo
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Description
本発明は、電池のエネルギー密度を増加させることができるリチウム電極に関する。
本発明はまた、集電体;前記集電体の両面に形成されたリチウム化されたSiOコーティング層;及び前記リチウム化されたSiOコーティング層上にそれぞれ形成された保護層;を含むリチウム電極に関する。
本発明はまた、電池のエネルギー密度を増加させることができるリチウム電極の製造方法に係り、(S1)基材上にリチウム金属保護用高分子をコーティングして保護層を形成する段階;(S2)前記保護層上にリチウム金属を蒸着してリチウム金属層を形成する段階;及び(S3)前記リチウム金属層を集電体の少なくとも一面に転写する段階;を含むリチウム電極の製造方法に関する。
(S1)段階では、基材上にリチウム金属保護用高分子をコーティングしてリチウム金属保護用保護層を形成することができる。
(S2)段階では、前記保護層上にリチウム金属を蒸着してリチウム金属層を形成することができる。
(S3)段階では、前記リチウム金属層を集電体に転写することができる。この時、転写は前記基材、保護層及びリチウム金属層が順次積層された構造体を捲取した後、ロールプレスのような装置を利用して集電体上に前記リチウム金属層が転写させることができる。
本発明は、前述したようなリチウム電極を含むリチウム二次電池に関する。
基材として両面に離型層が形成された離型PET フィルム(SKC Haas社製、RX12G 50μm)を準備した。
実施例1と同様に実施するが、保護層形成用高分子としてPVDF-HFPの代わりにPVDFを利用してPVDF保護層を形成した。
実施例1と同様に実施するが、両面にSiOコーティング層が形成された集電体を利用してリチウム電極を製造した。
Cu集電体上にリチウム金属を直接蒸着してリチウム金属層を形成した後、前記リチウム金属層上にPVDF-HFPコーティング液を塗布してリチウム電極を製造した。この時、蒸着工程は600℃温度で真空蒸着法(Evaporation Deposition)で実施して厚さ12μmのリチウム金属層を形成し、前記PVDF-HFPコーティング液はNMP溶媒にPVDF-HFP(Arkema社製、LBG Grade)を溶解させ、5%溶液になるようにして製造してスピンコーティングによって前記リチウム金属層上にPVDF-HFP保護層を形成した。
図9は実施例1で製造されたリチウム電極を示す写真で、図10は比較例1で製造されたリチウム電極を示す写真である。
20a、20b:リチウム金属層
30a、30b:保護層
40a、40b:基材
41:離型層
50a、50b:SiOコーティング層
60:積層された構造体
Claims (9)
- 集電体;
前記集電体の少なくとも一面に形成されたリチウム金属層;
前記集電体とリチウム金属層の間に形成されたSiOコーティング層;
前記リチウム金属層上に形成された保護層;
前記保護層上に形成された基材;及び
前記基材の少なくとも一面に形成された離型層;を含む、リチウム電極であって、
前記保護層は、ポリフッ化ビニリデン(PVDF:Poly Vinylidene Fluoride)、ポリフッ化ビニリデン-ヘキサフルオロプロピレンコポリマー(PVDF-HFPコポリマー:Poly Vinylidene Fluoride-hexafluoropropylene copolymer)、シクロオレフィンポリマー(Cyclo olefin polymer)、シクロオレフィンコポリマー(Cyclo olefin copolymer)及びスチレンブタジエンゴム-カルボキシメチルセルロース(SBR-CMC:Styrene Butadiene Rubber-Carboxymethyl Cellulose)からなる群から選択される1種以上を含む、リチウム電極。 - 前記SiOコーティング層は、SiOとグラファイト(graphite)の混合コーティング層である、請求項1に記載のリチウム電極。
- 前記SiOとグラファイトは1:1ないし1:9の重量比で混合された、請求項2に記載のリチウム電極。
- 前記集電体は、銅;ステンレススチール;アルミニウム;ニッケル;チタン;焼成炭素;銅;カーボン、ニッケル、チタンまたは銀で表面処理されたステンレススチール;及びアルミニウム-カドミウム合金;からなる群から選択される、請求項1から3の何れか一項に記載のリチウム電極。
- 前記リチウム金属層の厚さは1ないし50μmである、請求項1から4の何れか一項に記載のリチウム電極。
- 前記離型層は、シリコン系樹脂、メラミン系樹脂及びフッ素系樹脂からなる群から選択される1種以上を含む、請求項1から5のいずれか一項に記載のリチウム電極。
- 前記基材は、ポリエチレンテレフタレート(polyethylene terephthalate、PET)、ポリイミド(polyimide、PI)、ポリメチルメタクリル酸(poly(methylmethacrylate)、PMMA)、TAC(cellulose tri-acetate)、ポリプロピレン(Polypropylene)、ポリエチレン(Polyethylene)及びポリカーボネート(Polycarbonate)からなる群から選択される1種以上を含む、請求項1から6の何れか一項に記載のリチウム電極。
- 集電体;
前記集電体の少なくとも一面に形成されたリチウム化されたSiOコーティング層;
前記リチウム化されたSiOコーティング層上に形成された保護層;
前記保護層上に形成された基材;及び
前記基材の少なくとも一面に形成された離型層;を含む、リチウム電極であって、
前記保護層は、ポリフッ化ビニリデン(PVDF:Poly Vinylidene Fluoride)、ポリフッ化ビニリデン-ヘキサフルオロプロピレンコポリマー(PVDF-HFPコポリマー:Poly Vinylidene Fluoride-hexafluoropropylene copolymer)、シクロオレフィンポリマー(Cyclo olefin polymer)、シクロオレフィンコポリマー(Cyclo olefin copolymer)及びスチレンブタジエンゴム-カルボキシメチルセルロース(SBR-CMC:Styrene Butadiene Rubber-Carboxymethyl Cellulose)からなる群から選択される1種以上を含む、リチウム電極。 - 請求項1ないし7のいずれか一項に記載のリチウム電極を含むリチウム二次電池。
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2017-0133772 | 2017-10-16 | ||
| KR20170133772 | 2017-10-16 | ||
| KR10-2018-0122935 | 2018-10-16 | ||
| KR1020180122935A KR102305482B1 (ko) | 2017-10-16 | 2018-10-16 | 리튬 전극 및 이를 포함하는 리튬 이차전지 |
| PCT/KR2018/012151 WO2019078571A2 (ko) | 2017-10-16 | 2018-10-16 | 리튬 전극 및 이를 포함하는 리튬 이차전지 |
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| JP2020535607A JP2020535607A (ja) | 2020-12-03 |
| JP7150012B2 true JP7150012B2 (ja) | 2022-10-07 |
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| US (1) | US11430977B2 (ja) |
| EP (1) | EP3667774A4 (ja) |
| JP (1) | JP7150012B2 (ja) |
| KR (1) | KR102305482B1 (ja) |
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| KR102305481B1 (ko) * | 2017-12-04 | 2021-09-27 | 주식회사 엘지에너지솔루션 | 리튬 전극, 이의 제조방법 및 이를 포함하는 리튬 이차전지 |
| KR102658723B1 (ko) * | 2019-09-06 | 2024-04-19 | 주식회사 엘지에너지솔루션 | 리튬 이차전지용 음극의 제조방법 |
| CN111725486A (zh) * | 2020-07-01 | 2020-09-29 | 昆山宝创新能源科技有限公司 | 锂金属负极及其制备方法和应用 |
| US12368155B2 (en) | 2020-08-28 | 2025-07-22 | Pure Lithium Corporation | Lithium metal anode and battery |
| US12431480B2 (en) | 2020-08-28 | 2025-09-30 | Pure Lithium Corporation | Methods for forming an energy storage device |
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| US20250140780A1 (en) * | 2022-02-11 | 2025-05-01 | Li-Metal Corp. | Processing pvd-deposited anode assemblies |
| US20250105242A1 (en) * | 2023-09-26 | 2025-03-27 | GM Global Technology Operations LLC | Lithium metal layer transfer onto anode current collector |
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| EP3667774A4 (en) | 2021-03-17 |
| US11430977B2 (en) | 2022-08-30 |
| US20200274142A1 (en) | 2020-08-27 |
| JP2020535607A (ja) | 2020-12-03 |
| EP3667774A2 (en) | 2020-06-17 |
| KR102305482B1 (ko) | 2021-09-27 |
| KR20190042471A (ko) | 2019-04-24 |
| CN111201645A (zh) | 2020-05-26 |
| CN111201645B (zh) | 2023-07-25 |
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