Lithium-sulfur (Li-S) batteries are considered as one of the candidates for next-generation energy-storage devices. Despite their very high specific energy, commercialization of Li-S batteries is negatively affected by few drawbacks, such as irreversible capacity fade and volumetric expansion of the crystalline sulfur during the discharge. Recently, a huge amount of studies has been concentrated on using polymeric sulfur cathodes to overcome these problems. In particular, sulfur/carbon copolymers such as poly(sulfur-n-1,3-diisopropenylbenzene) (S/DIB) have attracted much attention. Thanks to a straightforward synthesis procedure, 1,2 S/DIB copolymers could be mass produced relatively easily. In addition, it has been demonstrated that S/DIB copolymers show a promising performance in alleviating the shuttle effect and therefore, can result in a stable cycling performance of a Li-S battery.