Three-dimensional porous titanium nitride as a highly efficient sulfur host

A simple, efficient, and scalable one-step high-temperature nitriding method was used to convert titanium dioxide into titanium nitride, meanwhile, the continuous three-dimensional porous network with good electrical conductivity and high porosity was formed under high-temperature sintering. As a highly efficient sulfur host, the continuous three-dimensional porous titanium nitride network not only effectively increases the electron transport path, enhances the electron transfer, and promotes the ion migration, but also strongly restricts the shuttle effect of lithium polysulfides from both physical limiting and chemisorption, and effectively increases the sulfur loading. The as-prepared sulfur cathode with high conductivity, high catalytic activity, and high sulfur loading shows high discharge capacity and excellent cyclic stability.