“…Compared to physical adsorption, chemical adsorption is more attractive to immobilize polysulfides. Accordingly, many polar material composites, such as oxides (TiO 2 , 12,13 15,16 CoS, 17 NiCo 2 S 4 , 18 VS 2 , etc. ), selenides (NiSe 2 19 ) and transition metals (Co, 20 Ni/Co, 21 etc.…”