Molten lithium-sulfur battery with solid electrolyte and method of manufacturing the same
AssigneeAgency for Defense Development
InventorsHae-Won Cheong, Chae-Nam Im, Ji-Youn Kim, Sung-Ho Kang, Jang-Hyeon Cho
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Abstract
This invention relates to a lithium-sulfur battery and a method of manufacturing the same, and more particularly, to a molten salt-based lithium-sulfur battery and a method of manufacturing the same, in which a metal foam including lithium or a lithium alloy, as an anode active material, and sulfur or metal sulfide, as a cathode active material, is used as a support and a current collector, and a solid-state electrolyte is used to thus improve energy density and power output characteristics.
Claims28
A method of manufacturing a molten lithium-sulfur battery, the method comprising manufacturing a cathode,
- wherein the manufacturing the cathode comprises:
- a first step of adding a cathode active material to a metal foam by immersing the metal foam in molten sulfur;
- a second step of subjecting a surface of the metal foam to sulfuration through heat treatment of the surface of the metal foam, which is obtained from the first step, in a sealed metal container;
- and
- a third step of additionally adding the cathode active material to the metal foam, which is obtained from the second step, by further immersing the metal foam in molten sulfur,
- wherein the molten lithium-sulfur battery includes:
- a sealed case;
- a solid electrolyte;
- a conductive metal foam having a plurality of pores;
- an anode using the metal foam and using lithium (Li) or a lithium alloy as an active material being accommodated into the metal foam;
- and
- a cathode using the metal foam and using sulfur (S) or a sulfide as an active material.
A method of manufacturing a molten lithium-sulfur battery, the method comprising manufacturing a cathode,
- wherein the manufacturing the cathode comprises:
- a first step of adding a cathode active material to a metal foam by injecting a slurry comprising a sulfur (S) powder into a plurality of pores of the metal foam;
- a second step of subjecting a surface of the metal foam to sulfuration through heat treatment of the surface of the metal foam, which is obtained from the first step, in a sealed metal container;
- and
- a third step of additionally adding the cathode active material to the metal foam, which is obtained from the second step, by further immersing the metal foam in molten sulfur,
- wherein the molten lithium-sulfur battery includes:
- a sealed case;
- a solid electrolyte;
- a conductive metal foam having a plurality of pores;
- an anode using the metal foam and using lithium (Li) or a lithium alloy as an active material being accommodated into the metal foam;
- and
- a cathode using the metal foam and using sulfur (S) or a sulfide as an active material.
Dependencies are inferred from the claim text.