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

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@CNIT (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. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

Transition metal sulfide materials have shown great potential as anode materials for lithium-ion batteries due to their rate stability and energy density. By preparing CoS2-MnS nanoparticles derived from MOFs and introducing carbon matrix materials, electrode materials with excellent rate capability and cycle stability were successfully synthesized. The CoS2-MnS@rGO composites exhibit outstanding rate performance and high reversible capacity, making them a promising candidate for lithium-ion battery anodes.