Modification of sulfur by carbonaceous materials with excellent electrical conductivity and low density has been proved effective to conquer the intrinsic deficiencies of sulfur.(13) To facilitate fast transport of electrons and Li ions, homogeneous and intimate contact between sulfur and carbon at the nanoscale needs to be realized by careful structural design. Fortunately, the diversity of carbonaceous materials provides scientists with opportunities to tune the architecture of the sulfur/carbon composites.(14-17) One successful example was reported by Ji et al. in 2009.(14) A sulfur–carbon interwoven nanostructure was constructed by filling sulfur in the tube-like nanopores of mesoporous carbon. The carbon network not only served as an excellent conducting agent but also trapped the polysulfides during redox. Therefore, a relatively high capacity up to 1320 mA h g–1 could be reached. However, the fully filled mesopores hindered the penetration of electrolytes, which was unfavorable to fast diffusion of Li ions and gave rise to limited rate capability.(18, 19) Therefore, accessible pores within the sulfur/carbon composites are essential to shorten the diffusion length of Li ions. The carbon nanotube (CNT), which has an anisotropic 1D and flexible nanostructure, is suitable for the construction of nanoporous structures and has been extensively used in the modification of the sulfur cathode.(20-27) The structure of the sulfur–CNT (S–CNT) composites significantly affects their electrochemical performance. In some recent studies, S–CNT composites with a structure of a thin layer of sulfur coated on the outer surface of CNTs were reported and exhibited enhanced electrochemical performance.(20, 22) The intimate contact between sulfur and CNTs guaranteed fast electron transport within each composite nanotube, and sulfur was readily exposed to electrolytes, which was beneficial for the rapid diffusion of Li ions.