6.5 Lithium-Sulfur Battery
175
Table 6.7 The structure and
performance of various
organic sulfides
Category
Structure
Specific
capacity
(mAh g −1 )
Disulfide
425
Poly-disulfide
362
Dithio-polymer
270
Organo-multi
sulfide
200–350
Sulfurized
polymers
345–720
Sulfurized
polymers
850
Sulfurized
polymers
600
physically limit the polysulfide, prevent the dissolution and diffusion of polysulfides,
and inhibit the “shuttle effect”. In addition, utilizing the excellent mechanical strength
and porous structure of the carbon material can reduce the volume expansion and
contraction of the electrode caused by the charging and discharging of lithiumsulfur batteries At the moment, sulfur/carbon composites, sulfur/carbon nanotube
composites, sulfur/graphene composites, and sulfur/carbon fiber composites are the
most widely studied among sulfur/carbon composites.
Sulfur/Carbon Nanotubes Composites
Carbon nanotubes are the first carbon materials used in lithium-sulfur electrodes,
they have many advantages, such as large specific surface area, high electrical