Liquid electrolyte lithium-sulfur batteries
AssigneePolyPlus Battery Company
InventorsBruce D. Katz, May-Ying Chu, Lutgard C. DeJonghe, Steven J. Visco
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Abstract
A high performance lithium-sulfur battery cell includes the following features: (a) a negative electrode including a metal or an ion of the metal; (b) a positive electrode comprising an electronically conductive material; and (c) a liquid catholyte including a solvent and dissolve electrochemically active material comprising sulfur in the form of at least one of a sulfide of the metal and a polysulfide of the metal. Such battery cells are characterized by an energy density, calculated based upon a laminate weight, of at least about 400 Watt-hours/kilogram when discharged at a rate of at least 0.1 mA/cm2. Cells meeting these criteria often find use as primary cells.
Claims26
A battery cell comprising:
- a) a negative electrode including a metal or an ion of the metal;
- b) a positive electrode comprising an electronically conductive material;
- and
- c) a liquid catholyte including a solvent and dissolved electrochemically active material comprising sulfur in the form of at least one of a sulfide of the metal and a polysulfide of the metal,
- wherein the battery cell is characterized by an energy density, calculated based upon a laminate weight, of at least about 400 Watt-hours/kilogram when discharged at a rate of at least 0.1 mA/cm2.
A rechargeable battery cell comprising:
- a) a negative electrode including a metal or an ion of the metal;
- b) a positive electrode comprising an electronically conductive material;
- and
- c) a liquid catholyte including a solvent and dissolved electrochemically active material comprising sulfur in the form of at least one of a sulfide of the metal and a polysulfide of the metal,
- wherein the rechargeable battery cell is characterized by at least one of the following criteria:
- i) the battery cell attains at least about 10% utilization over at least fifty cycles at an average current density of at least about 0.5 mA/cm2, and
- ii) the battery cell attains at least about 50% utilization over two or more cycles at an average current density of at least about 0.5 mA/cm2.
Dependencies are inferred from the claim text.