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US-2020168885-A1 · May 28, 2020 · US
Electrode for lithium secondary battery and lithium secondary battery comprising same
US12002961B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12002961-B2 |
| Application number | US-201917266802-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 31, 2019 |
| Priority date | Aug 8, 2018 |
| Publication date | Jun 4, 2024 |
| Grant date | Jun 4, 2024 |
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Abstract
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The present disclosure relates to an electrode for a lithium secondary battery which includes: an electrode current collector; a primer coating layer disposed on at least one surface of the electrode current collector and including a binder and a conductive material; and an electrode active material layer disposed on the primer coating layer, wherein the binder includes poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) containing vinylidene fluoride (VDF)-derived repeating units and hexafluoropropylene (HFP)-derived repeating units, the content of HFP-derived repeating units in PVDF-HFP is 2-13 wt %, and the primer coating layer has a thickness of 0.8-10 μm.
First claim
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What is claimed is: 1. An electrode for a lithium secondary battery comprising: an electrode current collector; a primer coating layer disposed on at least one surface of the electrode current collector and comprising a binder and a conductive material; and an electrode active material layer disposed on the primer coating layer, wherein the binder comprises poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) containing vinylidene fluoride (VDF)-derived repeating units and hexafluoropropylene (HFP)-derived repeating units, a content of the HFP-derived repeating units in PVDF-HFP is 2-13 wt %, and the primer coating layer has a thickness of 0.8-5 μm, wherein the primer coating layer comprises the binder in an amount of 26-80 parts by weight based on 100 parts by weight of the conductive material. 2. The electrode for a lithium secondary battery according to claim 1 , wherein the primer coating layer comprises the binder in an amount of 35-80 parts by weight based on 100 parts by weight of the conductive material. 3. The electrode for a lithium secondary battery according to claim 2 , wherein the primer coating layer comprises the binder in an amount of 35-65 parts by weight based on 100 parts by weight of the conductive material. 4. The electrode for a lithium secondary battery according to claim 1 , wherein the content of HFP-derived repeating units in PVDF-HFP is 3-10 wt %. 5. The electrode for a lithium secondary battery according to claim 1 , wherein the primer coating layer has a thickness of 1-2 μm. 6. The electrode for a lithium secondary battery according to claim 1 , wherein the primer coating layer has a thickness corresponding to 0.01-0.05 times of a thickness of the electrode active material layer. 7. The electrode for a lithium secondary battery according to claim 6 , wherein the primer coating layer has a thickness corresponding to 0.01-0.03 times of a thickness of the electrode active material layer. 8. The electrode for a lithium secondary battery according to claim 1 , wherein the binder includes PVDF-HFP in an amount of 50 wt % or more based on 100 wt % of the binder. 9. The electrode for a lithium secondary battery according to claim 1 , wherein the electrode active material layer comprises an electrode binder, and the electrode binder comprises PVDF-HFP in an amount of 5 wt % or less based on 100 wt % of the electrode binder. 10. A lithium secondary battery comprising a positive electrode, a negative electrode and a separator interposed between the positive electrode and the negative electrode, wherein the positive electrode or the negative electrode is the electrode according to claim 1 . 11. The electrode for a lithium secondary battery according to claim 1 , wherein the primer coating layer comprises the binder in an amount of 40-50 parts by weight based on 100 parts by weight of the conductive material. 12. The electrode for a lithium secondary battery according to claim 1 , wherein the content of HFP-derived repeating units in PVDF-HFP is 3-7 wt %. 13. The electrode for a lithium secondary battery according to claim 1 , wherein the electrode active material layer comprises an electrode binder including polyvinylidene fluoride (PVDF). 14. The electrode for a lithium secondary battery according to claim 1 , wherein the primer coating layer has a thickness of 1-1.5 μm.
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- What does patent US12002961B2 cover?
- The present disclosure relates to an electrode for a lithium secondary battery which includes: an electrode current collector; a primer coating layer disposed on at least one surface of the electrode current collector and including a binder and a conductive material; and an electrode active material layer disposed on the primer coating layer, wherein the binder includes poly(vinylidene fluoride…
- Who is the assignee on this patent?
- Lg Energy Solution Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/667. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 04 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).