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Advanced design and fabrication of high performance sulfur cathodes with improved conductivity and chemical adsorption towards lithium polysulfides (LiPS) are crucial for further development of Li–S batteries. Hence, we designed a TiO 2 /Co 3 O 4 -CNTs composite derived from Ti-MOF (MIL-125) as the host matrix for sulfur cathode. The polar nature of metal oxides (TiO 2 , Co 3 O 4 ) creates the adsorptive sites in the composite and leads to an efficient chemical capture of LiPS. The CNTs ensure the contact between S/Li 2 S and the host material with high conductivity, enhanced charge transfer and fast electrochemical kinetics. At the same time, the CNTs strengthen the stability of the electrode material. Consequently, the as-prepared TiO 2 /Co 3 O 4 -CNTs composite showed excellent electrochemical performance. The cell with S–TiO 2 /Co 3 O 4 -CNTs delivers an initial specific capacity of 1270 mAh g –1  at 0.2 C and high rate performance with a capacity of 603 mAh g –1  at 3 C.

Carbon nanotubes assembled on porous TiO2 matrix doped with Co3O4 as sulfur host for lithium–sulfur batteries

Carbon nanotubes assembled on porous TiO₂ matrix doped with Co₃O₄ as sulfur host for lithium–sulfur batteries