Wound cylindrical lithium-sulfur battery including electrically-conductive carbonaceous materials
A lithium-sulfur battery includes a casing, a top lid circumferentially welded to the casing, a negative contact surface positioned opposite the top lid, a positive terminal disposed within the casing, welded to the top lid, and configured as a mandrel, a glass insulator circumferentially wound around the mandrel, and a jelly roll including at least an anode and a cathode wound around the mandrel. The jelly roll may also include a top surface not in contact with the top lid, a bottom surface partially in contact with the negative contact surface, and partially in contact with a plurality of non-hollow carbonaceous spherical particles disposed between the bottom surface of the jelly roll and the negative contact surface. At least some of the non-hollow carbonaceous spherical particles may provide one or more electrically-conductive pathways between the bottom surface and the negative contact surface.
1. A lithium-sulfur battery comprising:
a casing;
a top lid circumferentially welded to the casing;
a negative contact surface positioned opposite the top lid;
a positive terminal disposed within the casing and welded to the top lid, the positive terminal configured as a mandrel;
a glass insulator circumferentially wound around the mandrel; and
a jelly roll including at least an anode electroactive material and a cathode electroactive material wound around the mandrel, the jelly roll including:
a top surface not in contact with the top lid; and
a bottom surface partially in contact with the negative contact surface and partially in contact with a plurality of non-hollow carbonaceous particles, wherein the plurality of non-hollow carbonaceous spherical particles are disposed between the bottom surface of the jelly roll and the negative contact surface to provide one or more electrically-conductive pathways between the bottom surface and the negative contact surface.
2. The lithium-sulfur battery of claim 1 , wherein the casing is formed from one or more of aluminum or steel.
3. The lithium-sulfur battery of claim 1 , further comprising an electroactive material dispersed throughout the casing and within at least some of the plurality of non-hollow carbonaceous spherical particles.
4. The lithium-sulfur battery of claim 3 , wherein the electroactive material is sulfur.
5. The lithium-sulfur battery of claim 1 , further comprising a glass insulator wound around the mandrel and disposed within the casing.
6. The lithium-sulfur battery of claim 1 , wherein the jelly roll further includes:
an anode current collector coupled to the anode electroactive material;
a cathode current collector coupled to the cathode electroactive material; and
a ceramic separator disposed between the anode electroactive material and the cathode electroactive material.
7. The lithium-sulfur battery of claim 6 , wherein the cathode current collector includes a carbonaceous scaffold formed from materials oriented at one or more defined angles relative to the cathode electroactive material.
8. The lithium-sulfur battery of claim 6 , wherein the ceramic separator includes a plurality of pores configured to allow lithium ions to propagate between the anode electroactive material and the cathode electroactive material via the ceramic separator.
9. The lithium-sulfur battery of claim 6 , wherein the anode current collector is a copper foil, and the anode electroactive material a solid lithium layer.
10. The lithium-sulfur battery of claim 6 , wherein the positive terminal is welded to the cathode current collector, and the negative contact surface is welded to the anode current collector.
11. The lithium-sulfur battery of claim 6 , wherein the negative contact surface is welded to the anode current collector.
12. The lithium-sulfur battery of claim 6 , further comprising a separator pocket configured to house the ceramic separator.
13. The lithium-sulfur battery of claim 1 , further comprising an electrolyte configured to inhibit transport of lithium-containing polysulfide intermediate species from the cathode electroactive material to the anode electroactive material.
14. The lithium-sulfur battery of claim 1 , wherein the anode electroactive material is configured to output a plurality of lithium ions during operational discharge-charge cycling of the lithium-sulfur battery.
15. The lithium-sulfur battery of claim 1 , wherein one or both of the anode electroactive material and the cathode electroactive material has a length of 548 mm and a width of 100 mm.
16. The lithium-sulfur battery of claim 1 , wherein the cathode electroactive material comprises a plurality of interconnected non-hollow carbonaceous particles.
17. The lithium-sulfur battery of claim 16 , wherein the plurality of interconnected non-hollow carbonaceous particles collectively define a plurality of multi-porous pathways.
18. The lithium-sulfur battery of claim 17 , wherein at least some of the plurality of multi-porous pathways are configured to retain elemental sulfur.