CoS2–MnS@Carbon nanoparticles derived from metal–organic framework as a promising anode for lithium-ion batteries

Abstract

Transition metal sulfide materials (TMSs) with remarkable rate stability and desirable energy density have become the promising anode materials for lithium-ion batteries (LIBs). However, the low electrical conductivity and severe volume variation, always result in serious capacity decay during the charge-discharge process. In this work, we report a convenient and facile strategy to prepare MOFs-derived CoS2–MnS nanoparticles by using Co–Mn-based metal-organic frameworks (Co–Mn MOFs) as a precursor. In addition, CoS2–MnS/C (terephthalic acid, PTA), CoS2–MnS@CNT (carbon nanotubes) and CoS2–MnS@rGO (reduced graphene oxide) electrode materials are successfully synthesized by introducing carbon matrix materials. Benefiting from the synergistic between CoS2–MnS and the different carbon, CoS2–MnS@carbon electrode materials display excellent rate capability and cycle stability. The CoS2–MnS@rGO composites offer outstanding rate performance (1620 mA h g−1 at 100 mA g−1) and high reversible capacity (1327 and 927 mA h g−1 at 100 and 1000 mA g−1, respectively, after 100 cycles). Because of its high cycle performance and excellent lithium storage performance, the CoS2–MnS@rGO can be considered as a promising anode material for lithium-ion batteries.