High loading electrodes having high areal capacity and energy storage devices including the same

Patent metadata

Field	Value
Publication number	US-2025233163-A1
Application number	US-202519059197-A
Country	US
Kind code	A1
Filing date	Feb 20, 2025
Priority date	Aug 16, 2019
Publication date	Jul 17, 2025
Grant date	—

Abstract

Provided is a high areal capacity loading electrode that includes: a metal current collector; and an active material layer on the metal current collector, wherein the electrode has high areal capacity loading of greater than or equal to about 2.0 mAh/cm 2 , and the electrode is perforated with holes spaced from each other at an average distance ranging from about 70 μm to about 900 μm. An energy storage device including the high loading electrode is also provided.

First claim

What is claimed is:

1 . A high loading electrode comprising
a metal current collector, and an active material layer disposed on the metal current collector, the electrode has holes spaced from each other at an interval ranging from about 450 μm to about 900 μm, and a total volume occupied by holes in the active material layer is about 0.1 vol % to about 5 vol % based on a total volume, 100 vol %, of the active material layer.

2 . The high loading electrode of claim 1 , wherein
wherein the electrode has an areal capacity of greater than or equal to about 4 mAh/cm2.

3 . The high loading electrode of claim 1 , wherein
the electrode has holes spaced from each other at an average distance ranging from about 70 μm to about 900 μm.

4 . The high loading electrode of claim 1 , wherein
the holes have a regular hexagonal pattern.

5 . The high loading electrode of claim 1 , wherein
when the high loading electrode is a negative electrode, the active material layer comprises a negative active material including intercalated graphite, soft carbon, hard carbon, or a related carbon.

6 . The high loading electrode of claim 1 , wherein
when the high loading electrode is a positive electrode, the active material layer comprises a layered lithium nickel cobalt manganese oxide (NCM), a lithium nickel cobalt aluminum oxide (NCA), or a related layered nickel-containing oxide positive active material.

7 . The high loading electrode of claim 1 , wherein the holes have a depth of about 30% to about 100%.

8 . The high loading electrode of claim 1 , wherein the positive active material layer has porosity of about 5 vol % to about 40 vol % based on a total volume, 100 vol %, of the active material layer.

9 . The high loading electrode of claim 6 , wherein
when the electrode is a positive electrode, the porosity is about 5 vol % to about 25 vol % based on a total volume, 100 vol %, of the active material layer.

10 . The high loading electrode of claim 6 , wherein when the electrode is a negative electrode, the porosity may be about 15 vol % to about 35 vol % based on a total volume, 100 vol %, of the active material layer.

11 . The high loading electrode of claim 1 , wherein the active material layer comprises at least two layers having different porosities.

12 . The high loading electrode of claim 1 , wherein the holes have a cone shape.

13 . The high loading electrode of claim 11 , wherein the holes have a concave cone shape.

14 . The high loading electrode of claim 11 , wherein the holes have a cone shape with a blunt end.

15 . The high loading electrode of claim 11 , wherein the base of the cone is elliptical or circular.

16 . The high loading electrode of claim 14 , wherein the base of the cone has a diameter of about 5 μm to about 300 μm.

17 . An energy storage device comprising the high loading electrode of claim 1 .

18 . The energy storage device of claim 15 , wherein the energy storage device is a battery or a capacitor.

19 . The energy storage device of claim 16 , wherein
the battery comprises: a negative electrode and a positive electrode facing each other; an electrolyte ionically coupling the negative electrode and the positive electrode; and a separator electrically separating the negative electrode and the positive electrode, wherein at least one of the negative electrode and the positive electrode is the high loading electrode.

Assignees

• Samsung Sdi Co Ltd
• Georgia Tech Res Inst

Inventors

• Lee Seunghun
• Yushin Gleb
• Kim Doyoub

Classifications

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01G11/52

  Separators · CPC title

• H01G11/24

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title