Lithium-sulfur battery and methods of reducing insoluble solid lithium-polysulfide depositions
AssigneeEaglepicher Technologies, LLC
InventorsRamanathan THILLAIYAN, Wujun FU, Mario DESTEPHEN, Greg MILLER
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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.
Claims42
A lithium-sulfur battery, comprising:
- an anode comprising lithium;
- an electrolyte comprising an additive, wherein the additive comprises a strontium additive;
- and
- a cathode comprising a cathode material including sulfur.
(canceled)
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;
- and
- a non-aqueous electrolyte which is in fluid communication with the anode, the cathode and the separator,
- wherein the separator and/or the non-aqueous electrolyte includes a strontium additive.
(canceled)
A method of charging a lithium-sulfur electrochemical cell, comprising:
- supplying electrical energy to the lithium-sulfur electrochemical cell at a constant current;
- monitoring the voltage during charging;
- and
- terminating the charge when the monitored voltage is in a range of about 2.1 volts to about 3.0 volts,
- wherein the lithium-sulfur electrochemical comprises:
- 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;
- and
- a non-aqueous electrolyte which is in fluid communication with the anode, the cathode and the separator,
- wherein the separator and/or the non-aqueous electrolyte includes a strontium additive.
(canceled)
Dependencies are inferred from the claim text.