Sulfur/Silica/Polyaniline core-shell structure nanocomposite for cathode of lithium-sulfur battery and method for preparing same

摘要

The invention provides a sulfur/silica/polyaniline core-shell structure nanocomposite for a lithium sulfur battery positive electrode and a preparation method thereof. The composite uses sulfur-loadednano-silica as the core of the core-shell structure, the polyaniline is used as the shell of the core-shell structure, the nano-silica has a spherical structure; the spherical structure is internallyprovided with a plurality of radial mesopore channels; and sulfur is loaded in the radial mesopore channel of nano-silica. Through using silica as a sulfur main body and the synergistic effect of conductive polyaniline on the improvement of the conductive properties of active substances, a conductive polyaniline/silica/sulfur ternary composite with a special structure is prepared, and the composite can improve the electrochemical performance of the lithium sulfur battery.