JP2023508087A - リチウム親和物質がコーティングされたリチウム二次電池用負極及びその製造方法 - Google Patents
リチウム親和物質がコーティングされたリチウム二次電池用負極及びその製造方法 Download PDFInfo
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- JP2023508087A JP2023508087A JP2022539034A JP2022539034A JP2023508087A JP 2023508087 A JP2023508087 A JP 2023508087A JP 2022539034 A JP2022539034 A JP 2022539034A JP 2022539034 A JP2022539034 A JP 2022539034A JP 2023508087 A JP2023508087 A JP 2023508087A
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- Prior art keywords
- negative electrode
- lithium
- secondary battery
- current collector
- lithium secondary
- Prior art date
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Abstract
Description
<実施例1>
網状(mesh)構造の銅(copper)集電体の一側面にマスキング部材としてポリイミドテープを付着した。
前記実施例1で、LPMコーティング液のHAuCl4の濃度を2mg/mlから5mg/mlに変更したことを除き、前記実施例1と同様な方法で負極を製造した。
前記実施例1で、LPMコーティング液のHAuCl4をAgNO3に変更したことを除き、前記実施例1と同様な方法で負極を製造した。
前記実施例1で、銅集電体をブロンズ(bronze)集電体に変更したことを除き、前記実施例1と同様な方法で負極を製造した。
LPMコーティングを遂行しなかった表面の滑らかな銅集電体を準備して負極として使った。
LPMコーティングを遂行しなかった網状構造の銅集電体を準備して負極として使った
比較例2で製造された負極のSEM写真を図11及び図12に示す。図12は図11の白色四角部の拡大図である。
マスキング部材を塗布しなかった網状構造の銅集電体を、2mg/mlのHAuCl4をエタノールに溶解したLPMコーティング液に10秒間担持することで、銅集電体の両面にLPMコーティング層が形成された負極を製造した。
前記実施例1から実施例4及び比較例1から比較例3で製造された負極を使ってコイン電池(coin cell)を製造した。
放電条件:CC(定電流)条件3V、0.5C
マスキング部材を塗布しなかった網状構造の銅集電体を、2mg/mlのHAuCl4をエタノールに溶解したLPMコーティング液に10秒間浸漬することで、銅集電体の両面にLPMコーティング層が形成された負極を製造した。
Claims (11)
- リチウム二次電池用負極であって、
負極集電体は内部気孔を有する多孔性構造または上下面が貫通された貫通口を含み、
正極と対面する第1面を除いた前記多孔性構造または前記貫通口の表面にリチウム親和物質(lithiophilic material、LPM)が塗布された、リチウム二次電池用負極。 - 前記リチウム親和物質上でリチウムプレーティング(Li plating)がなされる、請求項1に記載のリチウム二次電池用負極。
- 前記リチウム親和物質は、金属及び金属酸化物のうちの少なくとも一つである、請求項1または2に記載のリチウム二次電池用負極。
- 前記リチウム親和物質は、Au、Ag、Pt、Zn、Si及びMgを含む金属及びCuO、ZnO、CoO及びMnOを含む金属酸化物のうちのいずれか1種以上である、請求項3に記載のリチウム二次電池用負極。
- 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の製造方法であって、
内部気孔を有する多孔性構造または上下面が貫通された貫通口を有する負極集電体を準備する段階と、
前記負極集電体のうち正極と対面する第1面をマスキングする段階と、
前記マスキングされた負極集電体をリチウム親和物質でコーティングする段階と、
前記マスキングを除去する段階と、
を含む、リチウム二次電池用負極の製造方法。 - 前記コーティングする段階は、浸漬(Immersing)、スピンコーティング(Spin Coating)、ディップコーティング(Dip Coating)、スプレーコーティング(Spray Coating)、ドクターブレード(Doctor Blade)、溶液キャスティング(Solution Casting)、ドロップコーティング(Drop Coating)、物理蒸着(Physical Vapor Deposition;PVD)、及び化学蒸着(Chemical Vapor Deposition;CVD)からなる群から選択される少なくとも一つによって遂行する、請求項5に記載のリチウム二次電池用負極の製造方法。
- 前記マスキングする段階は、前記負極集電体の第1面にテープを付着する方法で遂行する、請求項5または6に記載のリチウム二次電池用負極の製造方法。
- 前記マスキングを除去する段階の後、前記リチウム親和物質コーティング液を除去する過程をさらに含む、請求項5から7のいずれか一項に記載のリチウム二次電池用負極の製造方法。
- 前記マスキングが除去された前記負極集電体は、前記マスキングされた前記正極と対面する第1面を除いた内部気孔及び貫通口にリチウム親和物質がコーティングされている、請求項5から8のいずれか一項に記載のリチウム二次電池用負極の製造方法。
- 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を含む、電極組立体。
- 前記電極組立体は、互いに異なる2個の電極が分離膜を挟んで配置されるモノセル(mono-cell)、または隣接した電極の極性が互いに異なる3個の電極が分離膜を挟んで配置されるバイセル(bi-cell)である、請求項10に記載の電極組立体。
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PCT/KR2021/005192 WO2021221397A1 (ko) | 2020-04-27 | 2021-04-23 | 리튬 친화물질이 코팅된 리튬 이차전지용 음극 및 이의 제조방법 |
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