Electrode for Lithium Rechargeable Battery and Lithium Rechargeable Battery Using the Same

Patent metadata

Field	Value
Publication number	US-2025096424-A1
Application number	US-202318729638-A
Country	US
Kind code	A1
Filing date	Sep 15, 2023
Priority date	Sep 15, 2022
Publication date	Mar 20, 2025
Grant date	—

Abstract

An electrode for a lithium rechargeable battery includes an electrode substrate and a porous layer formed on the electrode substrate. The porous layer includes a binder resin and inorganic fine particles. The inorganic fine particles include boehmite and barium sulfate. A lithium rechargeable battery comprising the electrode is also provided.

First claim

1 . An electrode for a lithium rechargeable battery comprising:
an electrode substrate; and a porous layer formed on the electrode substrate, the porous layer comprising a binder resin and inorganic fine particles, wherein the inorganic fine particles include boehmite and barium sulfate.

2 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the inorganic fine particles include boehmite and barium sulfate in a weight ratio ranging from 9:1 to 6:4.

3 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the barium sulfate has a green density ranging from 2 g/cm 3 to 3 g/cm 3 , and a BET specific surface area ranging from 5 m 2 /g to 50 m 2 /g.

4 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the boehmite has a green density ranging from 1 g/cm 3 to 1.8 g/cm 3 , and a BET specific surface area ranging from 5 m 2 /g to 120 m 2 /g.

5 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the boehmite and the barium sulfate each include primary particles having a diameter ranging from 5 nm to 90 nm.

6 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the porous layer has a porosity ranging from 30% to 90%.

7 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the porous layer has a thickness ranging from 0.1 μm to 100 μm.

8 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the porous layer includes 110 parts by weight to 5000 parts by weight of the inorganic fine particles based on 100 parts by weight of the binder resin.

9 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the porous layer includes 50 parts by weight to 500 parts by weight of barium sulfate based on 100 parts by weight of the binder resin.

10 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the porous layer includes 110 parts by weight to 1000 parts by weight of boehmite based on 100 parts by weight of the binder resin.

11 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the binder resin comprises one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene, polyvinylidene fluoride-tetrafluoroethylene, polyvinylidene fluoride-trichlorethylene, polyvinylidene fluoride-chlorotrifluoroethylene, polymethyl methacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinyl acetate, ethylene vinyl acetate copolymer, polyethylene oxide, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, cyanoethyl pullulan, cyanoethyl polyvinyl alcohol, cyanoethyl cellulose, cyanoethyl sucrose, pullulan, carboxyl methyl cellulose, acrylonitrile-styrene-butadiene copolymer, polyurethane, polyacrylic acid, polyimide, or styrene butadiene rubber.

12 . The electrode for the lithium rechargeable battery of claim 1 , wherein:
the porous layer is coupled to the electrode substrate via an adhesive layer or an adhesive pattern formed on at least one surface of the porous layer.

13 . A lithium rechargeable battery comprising:
the electrode for the lithium rechargeable battery of claim 1 ; a counter electrode to the electrode of the lithium rechargeable battery; and an electrolyte interposed between the electrode for the lithium rechargeable battery and the counter electrode.

14 . The lithium rechargeable battery of claim 13 , wherein:
the lithium rechargeable battery does not include a porous polymer separator.

Assignees

• Lg Chemical Ltd

Inventors

• Kim Su Jun
• Park Jeongsoo
• Jin Sun Mi
• Lee Hana
• Yu Ingyoung

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M50/477

  characterised by their shape · CPC title

• H01M50/491

  Porosity · CPC title

• H01M50/486

  Organic material · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title