Method for manufacturing carbon-sulfur composite, carbon-sulfur composite manufactured thereby, and lithium-sulfur battery

摘要

The present invention relates to a method for manufacturing a carbon-sulfur composite, a carbon-sulfur composite manufactured by the method, and a lithium-sulfur battery including the same. In the carbon-sulfur composite manufactured by the method for manufacturing the carbon-sulfur composite, the sulfur is filled up to inside of the carbon balls, and thereby uniformly distributed. Accordingly, the sulfur content is increased, resulting to increase of capacity property, and also electrode structure does not collapse even though the sulfur is changed to a liquid phase while charging or discharging the battery, resulting to showing stable cycle property.

主权项

1. A method for manufacturing a carbon-sulfur composite, which comprises the steps of:
a) preparing a plurality of carbon balls; b) mixing the carbon balls and sulfur; c) filling the sulfur in the carbon balls by heating the mixture of the carbon balls and the sulfur under gas atmosphere at a temperature of 130 to 170° C. d) cooling the sulfur-filled carbon balls to room temperature; and e) heating the sulfur-filled carbon balls at a temperature of 250 to 350° C. under a pressure of 1.5 to 2.0 Mpa.