Lithium‑sulfur batteries (LSBs) have been appealing an increasing attention in last ten years with the overwhelming advantages of greatly higher theoretical energy density and specific capacity in comparison with traditional Li-ion batteries (LIBs). However, the commercial application of LSBs still confronts some intractable challenges, of which the shuttle effect and sluggish redox kinetics are reckoned as the most serious obstacles. Incorporation of polar sulfonate groups into cathode has been believed as an effective avenue to immobilize polysulfides and thus enables to alleviate the shuttle effect. Moreover, those grafted sulfonate groups create some more Li