Cylindrical lithium-sulfur batteries

Patent metadata

Field	Value
Publication number	US-2023275257-A1
Application number	US-202318137028-A
Country	US
Kind code	A1
Filing date	Apr 20, 2023
Priority date	Jul 23, 2021
Publication date	Aug 31, 2023
Grant date	—

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:
a mandrel;
an anode laminated sheet including an anode coupled to an anode current collector; and
a cathode laminated sheet including a cathode coupled to a cathode current collector, the cathode including one or more structured layers of agglomerates of carbonaceous particles disposed on opposing sides of the cathode current collector;
a negative terminal disposed along the length of the cylindrical casing and welded length-wise to the anode current collector, wherein the negative terminal is partially exposed outside the casing; and a positive terminal including the mandrel welded length-wise to the cathode current collector and separated from the casing by an insulator disposed in the lid.

2 . The lithium-sulfur battery of claim 1 , wherein the opposing sides of the cathode current collector include:
a first side disposed proximate to the casing; and a second side disposed opposite to the first side and proximate to the mandrel.

3 . The lithium-sulfur battery of claim 2 , wherein at least one of the one or more structured layers of agglomerates includes sulfur.

4 . The lithium-sulfur battery of claim 3 , wherein a sulfur loading in the one or more structured layers of agglomerates disposed on the first side of the cathode current collector is different from a sulfur loading in the one or more structured layers of agglomerates disposed on the second side of the cathode current collector.

5 . The lithium-sulfur battery of claim 2 , wherein the one or more structured layers of agglomerates of carbonaceous particles include agglomerates that are substantially spherical in shape.

6 . The lithium-sulfur battery of claim 5 , wherein the one or more structured layers of agglomerates of carbonaceous particles disposed on the first side of the cathode current collector include agglomerates that are similar in size to one another.

7 . The lithium-sulfur battery of claim 5 , wherein the one or more structured layers of agglomerates of carbonaceous particles disposed on the second side of the cathode current collector include agglomerates that are similar in size to one another.

8 . The lithium-sulfur battery of claim 5 , wherein an average size of the agglomerates of carbonaceous particles disposed on the first side of the cathode current collector is greater than an average size of the agglomerates of carbonaceous particles disposed on the second side of the cathode current collector.

9 . The lithium-sulfur battery of claim 5 , wherein a thickness of the one or more structured layers of agglomerates disposed on the first side of the cathode current collector is greater than a thickness of the one or structured layers of agglomerates disposed on the second side of the cathode current collector.

10 . The lithium-sulfur battery of claim 5 , wherein:
the first side of the cathode current collector includes one or more structured layers of agglomerates of carbonaceous particles, wherein each structured layer includes agglomerates that are similar in size to one another; and the second side of the cathode current collector includes one or more structured layers of agglomerates of carbonaceous particles, wherein each structured layer includes agglomerates that are similar in size to one another.

11 . The lithium-sulfur battery of claim 10 , wherein an average size of the agglomerates of carbonaceous particles disposed on the first side of the cathode current collector is greater than an average size of the agglomerates of carbonaceous particles disposed on the second side of the cathode current collector.

12 . The lithium sulfur battery of claim 10 , wherein an average size of the agglomerates of carbonaceous particles associated with a respective structured layer disposed on the first side of the cathode current collector is directly proportional to a distance between the first side of the cathode current collector and the respective structured layer.

13 . The lithium sulfur battery of claim 10 , wherein an average size of the agglomerates of carbonaceous particles associated with a respective structured layer disposed on the second side of the cathode current collector is directly proportional to a distance between the second side of the cathode current collector and the respective structured layer.

14 . The lithium-sulfur battery of claim 2 , wherein the one or more structured layers of agglomerates of carbonaceous particles include agglomerates that are substantially non-spherical in shape.

15 . The lithium-sulfur battery of claim 1 , wherein each of the carbonaceous particles includes a plurality of interconnected non-hollow carbonaceous particles.

16 . The lithium-sulfur battery of claim 15 , wherein the plurality of interconnected non-hollow carbonaceous particles collectively define a plurality of multi-porous pathways, at least some of the plurality of multi-porous pathways configured to retain elemental sulfur.

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

18 . The lithium-sulfur battery of claim 17 , wherein the separator includes a ceramic containing material.

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

Assignees

• Lyten Inc

Inventors

• Bell Jeffrey
• Bugga Ratnakumar
• Gazda Jerzy

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M4/667 Primary

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

• H01M4/663

  containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title