Electrodes of rechargeable lithium batteries and rechargeable lithium batteries

Patent metadata

Field	Value
Publication number	US-2025192243-A1
Application number	US-202418970281-A
Country	US
Kind code	A1
Filing date	Dec 5, 2024
Priority date	Dec 6, 2023
Publication date	Jun 12, 2025
Grant date	—

Abstract

Disclosed are an electrode for a rechargeable lithium battery, and a rechargeable lithium battery including the same, the electrode including a current collector, an electrode active material layer on the current collector, and a functional layer, wherein the functional layer includes a lithium-containing polyoxazoline.

First claim

What is claimed is:

1 . An electrode for a rechargeable lithium battery, comprising:
a current collector, an electrode active material layer on the current collector, and a functional layer, wherein the functional layer comprises a lithium-containing polyoxazoline.

2 . The electrode as claimed in claim 1 , wherein:
the functional layer is on the electrode active material layer and/or is between the current collector and the electrode active material layer.

3 . The electrode as claimed in claim 1 , wherein:
the functional layer has a thickness of about 5 nm to about 900 nm.

4 . The electrode as claimed in claim 1 , wherein:
the functional layer is coated by electrospinning.

5 . The electrode as claimed in claim 1 , wherein:
the lithium-containing polyoxazoline is a polyoxazoline initiated with a lithium salt.

6 . The electrode as claimed in claim 5 , wherein:
the lithium salt comprises LiPF 6 , LiBF 4 , LiSbF 6 , LiAsF 6 , LiClO 4 , LiAlO 2 , LiAlCl 4 , LiPO 2 F 2 , LiCl, Lil, LiFSI, LiTFSI, LiOTf, LiBOB, LiDFOB, or a combination thereof.

7 . The electrode as claimed in claim 1 , wherein:
the lithium-containing polyoxazoline comprises lithium-containing poly(2-alkyl-2-oxazoline), lithium-containing poly(2-aryl-2-oxazoline), or a combination thereof, wherein the alkyl is a substituted or unsubstituted C1 to C10 alkyl and the aryl is a substituted or unsubstituted C6 to C20 aryl.

8 . The electrode as claimed in claim 1 , wherein:
the lithium-containing polyoxazoline comprises lithium-containing poly(2-methyl-2-oxazoline), lithium-containing poly(2-ethyl-2-oxazoline), lithium-containing poly(2-propyl-2-oxazoline), lithium-containing poly(2-isopropyl-2-oxazoline), lithium-containing poly(2-cyclopropyl-2-oxazoline), or a combination thereof.

9 . The electrode as claimed in claim 1 , wherein:
the lithium-containing polyoxazoline has a weight average molecular weight (M w ) of about 500 g/mol to about 500,000 g/mol.

10 . The electrode as claimed in claim 1 , wherein:
the lithium-containing polyoxazoline has a polydispersity (PDI; M w /M n ) of about 1 to about 4.

11 . The electrode as claimed in claim 1 , wherein:
the electrode is a negative electrode, and the electrode active material layer is a negative electrode active material layer or a negative electrode coating layer.

12 . The electrode as claimed in claim 11 , wherein:
the electrode active material layer is a negative electrode active material layer, and the negative electrode active material layer comprises a lithium metal, a lithium alloy, a carbon-based negative electrode active material, a silicon-based negative electrode active material, or a combination thereof.

13 . The electrode as claimed in claim 11 , wherein:
the electrode active material layer is a negative electrode coating layer, and the negative electrode coating layer comprises a lithiophilic metal, a carbon material, or a combination thereof, and a lithium metal layer is formed between the current collector and the negative electrode coating layer by charging.

14 . A rechargeable lithium battery comprising the electrode as claimed in claim 1 and an electrolyte.

15 . The rechargeable lithium battery as claimed in claim 14 , wherein:
the electrode is a negative electrode, and the rechargeable lithium battery further comprises a positive electrode facing the negative electrode.

16 . The rechargeable lithium battery as claimed in claim 14 , wherein
the electrode is a negative electrode, and the rechargeable lithium battery further comprises a separator between a positive electrode and the negative electrode.

Assignees

• Samsung Sdi Co Ltd
• Ulsan Nat Inst Science & Tech Unist

Inventors

• Hwang Taehyun
• KA Bokhyun
• Kim Ho
• Jeon Seongho
• Nam Junghyun
• Seol Jongheon
• Song Hyun-Kon
• Lee Myeong-Hee
• Kim Seong Su
• Jeong Jihong

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/602

  Polymers · CPC title

• H01M4/366

  as layered products · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title