FABRICATION PROCESS OF SULFUR-INFILTRATED MESOPOROUS CONDUCTIVE NANOCOMPOSITES FOR CATHODE OF LITHIUM-SULFUR SECONDARY BATTERIES

摘要

The present invention relates to a method for fabricating sulfur-infiltrated mesoporous conductive nanocomposites for a cathode of a lithium-sulfur secondary battery, whereby a cathode material having a relatively high content of sulfur compared with traditional sulfur-infiltrated mesoporous conductive nanocomposites can be fabricated and a higher energy density than ever can be realized in a lithium-sulfur secondary battery. For the purpose, the present invention provides a method for fabricating sulfur-infiltrated mesoporous conductive nanocomposites for a cathode of a lithium-sulfur secondary battery, comprising the steps of: a) performing thermal treatment on sulfur particles in a reactor at a high temperature to melt the sulfur particles; b) adding a mesoporous conductive material in macroscale to a sulfur solution in the reactor; c) pressurizing the mesoporous conductive material in the reactor at the upper part of the reactor so that the mesoporous conductive material can be completely immersed in the sulfur solution, and then maintaining the pressurized and molten state; d) cooling the sulfur particles and the mesoporous conductive material in macroscale so that sulfur within pores of the mesoporous conductive material can be crystallized; and e) grinding sulfur-infiltrated mesoporous conductive composites to fabricate sulfur-infiltrated mesoporous conductive nanocomposites.