Negative electrode plates, electrode assemblies, batteries and power consumption devices
Patent Information
- Application Number
- JP2025513066
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-02-02
- Filing Date
- 2023-09-19
- Publication Date
- 2025-08-28
- Estimated Expiration
- 2043-09-19
AI Technical Summary
【0005】 従来の技術に比べて、本出願は、以下に記載の有益な効果を少なくとも含む。本出願は、ナトリウム金属又はリチウム金属と反応してガスを発生させることができる機能性化合物が含まれるコーティングを負極極板のエッジに設置することにより、電池は、サイクルの後期に、デンドライトが負極極板の表面に平行に成長して延びる傾向は、デンドライトが負極極板の厚さ方向、即ち先端に沿って成長する傾向よりも大きく、負極極板の表面に平行に成長するデンドライトがコーティングまで延びると、このデンドライトは、コーティングと接触し、その中の機能性化合物と反応してガスを発生させて防爆弁を開くことによって、デンドライトがセパレータを突き破って電池の短絡を引き起こすリスクを回避する。
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Figure 2025528499000001_ABST
Abstract
Claims
1. A negative electrode plate, the edge of which is provided with a coating, the coating including a functional compound, the functional compound being capable of reacting with sodium metal or lithium metal to generate gas.
2. The negative electrode plate according to claim 1, wherein the functional compound includes at least one of an alcohol-based compound, a carboxylic acid-based compound, a phenol-based compound, an amine-based compound, a thiol-based compound, a benzophenone-based compound, and a cycloolefin-based compound.
3. 3. The negative electrode plate according to claim 1, wherein the number of carbon atoms on the main chain of the functional compound is 4 or more, preferably 4 to 12.
4. The negative electrode plate according to any one of claims 1 to 3, wherein the mass ratio of the functional compound in the coating is 70% to 90%.
5. The negative electrode plate according to any one of claims 1 to 4, wherein the coating has a thickness of 5 µm to 60 µm.
6. 6. The negative electrode plate according to claim 1, wherein the width of the coating is 3 mm or more, preferably 3 mm to 6 mm.
7. 7. The negative electrode plate of claim 1, wherein the coating extends to form an annulus around the outer periphery of the negative electrode plate.
8. The negative electrode plate according to claim 1 , wherein the coating is provided on both opposing sides in a width direction of the negative electrode plate.
9. The negative electrode plate according to claim 1 , wherein the negative electrode plate includes a negative electrode current collector, and the coating is provided on an edge of the negative electrode current collector.
10. 10. The negative electrode plate according to claim 1, wherein the negative electrode plate includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is provided on at least one side of the negative electrode current collector, and the coating is provided on an edge of the negative electrode active material layer.
11. 11. An electrode assembly comprising: a positive electrode plate; a negative electrode plate; and a separator, the separator being disposed between the positive electrode plate and the negative electrode plate; and the negative electrode plate comprising the negative electrode plate according to claim 1.
12. The electrode assembly of claim 11 , wherein an orthogonal projection of the coating on the negative electrode plate on the positive electrode plate is located outside the positive electrode plate.
13. 13. The electrode assembly according to claim 11, wherein a ceramic coating is provided on an end portion of the positive electrode plate along the longitudinal direction.
14. A battery comprising the electrode assembly of any one of claims 11 to 13.
15. 15. A power consuming device comprising the battery of claim 14, said battery being used to provide electrical energy.
Citation Information
Patent Citations
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