Cylindrical lithium-sulfur batteries

Patent metadata

Field	Value
Publication number	US-12009470-B2
Application number	US-202318137028-A
Country	US
Kind code	B2
Filing date	Apr 20, 2023
Priority date	Jul 23, 2021
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A lithium-sulfur battery includes a casing having a length and a width, the casing including at least an anode and a cathode wound into a jelly roll oriented parallel to the length of the casing, an electrolyte disposed in the lithium-sulfur battery, a negative terminal extending along the length of the casing, and a positive terminal extending along the length of the casing, the positive terminal and the negative terminal parallel to one another.

First claim

What is claimed is:

1. A lithium-sulfur battery including:
a lid circumferentially welded to a cylindrical casing;
a cylindrical jelly roll including:
an anode including one or more of lithium or lithium-containing alloys; and
a cathode including one or more structured layers of agglomerates of carbonaceous particles disposed on opposing sides of a cathode current collector;

a negative terminal disposed along the length of the cylindrical casing and attached length-wise to the anode, wherein the negative terminal is partially exposed outside the casing; and
a positive terminal including a mandrel attached to the cathode and separated from the casing by an insulator.

2. The lithium-sulfur battery of claim 1 , further including a separator disposed between the anode and the cathode.

3. The lithium-sulfur battery of claim 2 , wherein the separator includes a ceramic containing material.

4. The lithium-sulfur battery of claim 1 , wherein the negative terminal is formed of nickel.

5. The lithium-sulfur battery of claim 1 , wherein the anode further includes an anode protective layer disposed on the anode and configured to protect the anode from lithium erosion.

6. The lithium-sulfur battery of claim 5 , wherein the anode protective layer includes one or more of a polymeric network including one or more layers of carbonaceous materials grafted with fluorinated polymer chains cross-linked with each other, a carbonaceous material, or fluorinated poly(meth)acrylates.

7. The lithium-sulfur battery of claim 1 , wherein a cathode loading associated with the cathode is at least 7 g/cm 2 .

8. The lithium-sulfur battery of claim 1 , wherein a ratio of a reversible capacity (mAh) of the anode to that of the cathode (N/P ratio) is between about 2 and about 4.

Assignees

• Lyten Inc

Inventors

• Bell Jeffrey
• Bugga Ratnakumar
• Gazda Jerzy

Classifications

• H01M50/474

  characterised by their position inside the cells · CPC title

• H01M2004/021

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

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M10/0431

  Cells with wound or folded electrodes (H01M10/045 takes precedence) · CPC title