Electrode for rechargeable lithium battery, electrode assembly, and rechargeable lithium battery including the same

Patent metadata

Field	Value
Publication number	US-2025029985-A1
Application number	US-202418612723-A
Country	US
Kind code	A1
Filing date	Mar 21, 2024
Priority date	Jul 17, 2023
Publication date	Jan 23, 2025
Grant date	—

Abstract

Disclosed are an electrode for a rechargeable lithium battery, an electrode assembly including the same, and a rechargeable lithium battery, the electrode including an uncoated portion; an active material layer; and an endothermic ceramic layer which are provided sequentially from one end to the other end on the same single surface of the current collector.

First claim

What is claimed is:

1 . An electrode for a rechargeable lithium battery, comprising:
an uncoated portion; an active material layer; and an endothermic ceramic layer which are provided sequentially from one end to the other end on the same single surface of the current collector.

2 . The electrode as claimed in claim 1 , wherein:
the endothermic ceramic layer comprises pseudoboehmite.

3 . The electrode as claimed in claim 1 , wherein:
based on a total weight of 100 wt % of the endothermic ceramic layer, a content of pseudoboehmite is about 50 wt % to about 100 wt %.

4 . The electrode as claimed in claim 1 , wherein:
the electrode is a positive electrode, and a positive electrode tab is attached on the uncoated portion alone.

5 . The electrode as claimed in claim 1 , wherein:
the electrode is a positive electrode, and the active material layer comprises lithium nickel composite oxide represented by Chemical Formula 1:
Li a1 Ni x1 M 1 y1 M 2 1-x1-y1 O 2   Chemical Formula 1

wherein, in Chemical Formula 1, 0.9≤a1≤1.8, 0.3≤x1≤1, 0≤y1≤0.7, and M 1 and M 2 are each independently selected from Al, B, Ce, Co, Cr, F, Mg, Mn, Mo, Nb, P, S, Si, Sr, Ti, V, W, Zr, and a combination thereof.

6 . The electrode as claimed in claim 1 , wherein:
the uncoated portion; active material layer; and endothermic ceramic layer are on two opposing surfaces of the current collector, respectively.

7 . An electrode assembly for a rechargeable lithium battery, comprising a wound-type electrode assembly a stack of a negative electrode, a separator, and a positive electrode,
wherein at least one electrode of the negative electrode and the positive electrode is the electrode as claimed in claim 1 .

8 . The electrode assembly as claimed in claim 7 , wherein:
the endothermic ceramic layer is on the outermost layer of the wound-type electrode assembly.

9 . The electrode assembly as claimed in claim 7 , wherein:
the positive electrode is the electrode, and the positive electrode tab is on the uncoated portion alone of the positive electrode.

10 . A rechargeable lithium battery, comprising the electrode assembly as claimed in claim 7 and an electrolyte.

Assignees

• Samsung Sdi Co Ltd

Inventors

• Ha Jaehwan
• Kim Duckhyun
• Lee Dong Myung
• Yoo Heeeun

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/525 Primary

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/667

  in the form of layers, e.g. coatings · CPC title