The invention relates to a carbon-
sulfur-shell matter
composite material having a network dual-
core shell structure and a preparation method thereof. The carbon-
sulfur-shell matter
composite material has a carbon-
sulfur-shell three layer structure, a central core (inner core) is
nano carbon particles, sulfur elemental or a
polysulfide containing-Sm-structure (m>2) is directly deposited on the
nano carbon particles, or functional groups are introduced onto the
nano carbon particles by use of
polycyclic aromatic hydrocarbon like reaction capacity of the carbon material and through an irreversible
chemical reaction, polymeric chains are introduced in, a crosslinked
network structure is formed through stretching, bending and crosslinking of the polymeric chains on the surface of the nano carbon particles, the sulfur elemental or the
polysulfide containing the-Sm-structure (m>2) is composited onto the crosslinked
network structure to form a nano sulfur layer having a
network structure, then a mono-
core shell nano
composite material having a network structure is obtained and is used as a second layer (
outer core) of the carbon-sulfur-
polymer composite material having the network dual-
core shell structure, an outermost layer is a shell matter layer, electronic and / or
ionic conductivity of the material are / is improved, dissolving loss of
discharge products can be further inhibited, and
structural stability of the material is improved. The material is suitable for positive poles of
lithium sulfur batteries, and has a prominent effect on improvement of cycle stability of the
lithium sulfur batteries.