Ceria-carbon-sulfur composite, method for preparing same, and positive electrode and lithium-sulfur battery comprising same
AssigneesLG Energy Solution, Ltd., Sogang University Research Foundation
InventorsSeungbo YANG, Kwonnam SOHN, Jun Hyuk MOON, Doo Kyung YANG, Donghee GUEON, Jeong Tae HWANG
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Abstract
A ceria-carbon-sulfur (CeO2—C—S) composite including a ceria-carbon (CeO2—C) composite in which cylindrical carbon materials having ceria (CeO2) particles bonded to surfaces thereof are entangled and interconnected to each other in three dimensions; and sulfur introduced into at least a portion of an outer surface and an inside of the ceria-carbon composite, a method for preparing the same, and positive electrode for a lithium-sulfur battery and a lithium-sulfur battery including the same.
Claims5
A method for preparing a ceria-carbon-sulfur composite, comprising steps of:
- (a) preparing a dispersion in which template particles and cylindrical carbon materials are mixed;
- (b) spray-drying the dispersion to prepare template particle-carbon composites;
- (c) heat-treating the template particle-carbon composites to prepare carbon agglomerates having a hierarchical porosity structure;
- (d) preparing a mixed solution of the carbon agglomerates and cerium precursors;
- (e) preparing a ceria-carbon composite through a hydrothermal reaction by heating the mixed solution and then adding an acid;
- and
- (f) impregnating the ceria-carbon composite with sulfur to prepare the ceria-carbon-sulfur composite.
Dependencies are inferred from the claim text.