VN and SeS2 embedded porous carbon-nanofiber film as a free-standing electrode for improved Li-SeS2 batteries

We design a vanadium nitride (VN) modified porous carbon nanofiber film as the host to load SeS2 as the cathode (SeS2@VN/CNFs) for improving Li storage capacity. The conductive porous carbon nanofibers can accommodate active SeS2 and release the volume change. The introduced VN nanoparticles can chemically anchor the intermediate species and improve the utilization of SeS2. As a result, the SeS2@VN/CNFs cathode displays a superior electrochemical performance including a high reversible capacity of 806 mAh g(-1) at 0.2 C and good long-term cycling stability in Li-SeS2 batteries.

Automated summary

In this study, a VN modified porous carbon nanofiber film was designed as a host for loading SeS2 as the cathode material, leading to enhanced Li storage capacity. The conductive porous carbon nanofibers were able to accommodate active SeS2 and accommodate the volume changes. Introducing VN nanoparticles effectively anchored the intermediate species and improved the utilization of SeS2. As a result, the SeS2@VN/CNFs cathode exhibited superior electrochemical performance and good long-term cycling stability in Li-SeS2 batteries.