POWDER FOR CATHODE OF LITHIUM-SULFUR SECONDARY BATTERY AND METHOD OF FABRICATING THE SAME

摘要

Provided is powder for a cathode of a lithium-sulfur secondary battery that maximizes the utilization rate of sulfur by increasing the ratio of sulfur and an absolute content of sulfur, increases the capacity of the lithium-sulfur secondary battery and improves energy density and life-span characteristics, and a method of fabricating the same. The provided powder comprises a fibrous conductive material inserted in and penetrating a sulfur powder, a nano sized spherical conductive material coated on a surface of the sulfur powder to surround the surface of the sulfur powder, and a conductive polymer protective film is coated on an outer surface of the coated spherical conductive material layer.

主权项

1. Powder for a cathode of a lithium-sulfur secondary battery, comprising:
a fibrous conductive material inserted in a sulfur powder to penetrate the sulfur powder; a nano sized spherical conductive material coated on an outer surface of the sulfur powder which the fibrous conductive material penetrates, such that and the spherical conductive material forms a layer surrounding the entire outer surface of the sulfur powder; and a conductive polymer protective film is coated on an outer surface of the coated spherical conductive material layer.