A new FeS2/N-C nanoparticle from NH2-MIL-101 for high performance lithium ion batteries

Among multitudinous lithium storage electrode materials, transition metal sulfides have attracted widespread attention because of high theoretical capacity and wide availability. However, these anodes still suffer poor capacity retention and limited cycle life. Metal organic frameworks (MOFs) are important precursors for fabricating functional materials for energy conversion and storage. A study of their derivatization process is of great significance for the design of materials with specific functional properties. In this paper, a new FeS2/N-C nanoparticle is synthesized by calcination strategy from NH2-MIL-101 prepared by solvothermal method. Due to the coordination effect of nitrogen-doped carbon and special particle morphology, the synthesized FeS2/N-C nanoparticles have superior cycling stability and high reversible capacity. This work provides a better understanding of the carbonization process of MOFs and reveals the effect of N-doped and MOF synthesis time on transition metal sulfides.