Back to results
US 9,882,243 B2Granted
Lithium-sulfur battery and methods of reducing insoluble solid lithium-polysulfide depositions
AssigneeEaglepicher Technologies, LLC
InventorsRamanathan Thillaiyan, Wujun Fu, Mario Destephen, Greg Miller
Life of this patent
Estimating the term…
Abstract
An improved electrolyte including a strontium additive suitable for lithium-sulfur batteries, a battery including the electrolyte, and a battery including a separator containing a strontium additive are disclosed. The presence of the strontium additive reduces sulfur-containing deposits on the battery anode, thereby providing a battery with relatively high energy density and good partial discharge performance.
Claims45
A lithium-sulfur battery, comprising:
- an anode comprising lithium;
- an electrolyte;
- a cathode comprising a cathode material including sulfur;
- a separator disposed between the anode and the cathode, wherein each of the separator and the electrolyte comprises a strontium additive;
- and
- a sheet of surface-functionalized carbonaceous material disposed between the separator and the anode or the cathode, the surface-functionalized carbonaceous material being functionalized with amine or amide groups, wherein the sheet of surface-functionalized carbonaceous material comprises 1 to 30% of amine or amide groups by weight of the sheet of surface-functionalized carbonaceous material.
3 more elements
A non-aqueous lithium-sulfur electrochemical cell comprising:
- an anode including an anode material comprising lithium;
- a cathode including a cathode material comprising sulfur;
- a separator disposed between the anode and the cathode;
- a non-aqueous electrolyte which is in fluid communication with the anode, the cathode and the separator, wherein each of the separator and the non-aqueous electrolyte includes a strontium additive;
- and
- a sheet of surface-functionalized carbonaceous material disposed between the separator and the anode or the cathode, the surface-functionalized carbonaceous material being functionalized with amine or amide groups, wherein the sheet of surface-functionalized carbonaceous material comprises 1 to 30% of amine or amide groups by weight of the sheet of surface-functionalized carbonaceous material.
3 more elements
Dependencies are inferred from the claim text.