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US 7,029,796 B2Granted
Positive active material of a lithium-sulfur battery and method of fabricating same
AssigneeSamsung SDI Co., Ltd.
InventorsSoo-Seok Choi, Yun-Suk Choi, Ji-Seong Han, Seung-Hee Park, Yong-Ju Jung, Il-Young Lee
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Abstract
A positive active material of a lithium-sulfur battery includes a sulfur-conductive agent-agglomerated complex in which a conductive agent particle is attached onto a surface of a sulfur particle having an average particle size less than or equal to 7 μm. The sulfur-conductive agent-agglomerated complex is manufactured by mixing a sulfur powder and a conductive agent powder to form a mixture, and milling the mixture.
Claims31
A positive active material of a lithium-sulfur battery comprising:
- a sulfur-conductive agent-agglomerated complex in which a conductive agent particle is attached onto a surface of a sulfur particle having an average particle size less than or equal to 7 μm,
- wherein the conductive agent has an average particle size between 10 nm and 20 μm.
A lithium-sulfur battery comprising:
- a positive electrode comprising a sulfur-conductive agent-agglomerated complex, in which a conductive agent particle is attached onto a surface of a sulfur particle having an average particle size less than or equal to 7 μm;
- a negative electrode including a negative active material selected from the group consisting of a material capable of reversibly intercalating lithium ions, a material capable of reversibly reacting with lithium ions to form a lithium-included compound, a lithium metal, and a lithium alloy;
- and
- an electrolyte impregnated in the positive electrode and the negative electrode,
- wherein the conductive agent has an average particle size between 10 nm and 20 μm.
2 more elements
Dependencies are inferred from the claim text.