Hollow porous titanium nitride tubes as a cathode electrode for extremely stable Li–S batteries

Porous titanium nitride (TiN) tubes which have a high conductivity are used as the sulfur host material. The TiN tubes have a strong affinity for sulfur atoms/ions in LiPSs, and can catalyze the oxidation of LiPSs. The TiN/S cathode presented a high specific capacity, excellent cycling performance and high coulombic efficiency.