Hierarchically 3D structured milled lamellar MoS2/nano-silicon@carbon hybrid with medium capacity and long cycling sustainability as anodes for lithium-ion batteries

A hierarchically 3D structured milled lamellar MoS2/nano-siIicon@carbon hybrid with medium capacity and long-term lifespan is designed by a green and scalable approach using ball milling process and spraydrying/ pyrolysis routes. The microspheres consist of low-content nano-silicon (20 wt%), milled lamellar M0S2 sheets and porous carbon skeletons. A mixture of silicon nanoparticles and M0S2 flakes serves as an inner core, while porous carbon pyrolyzed from petroleum pitch acts as a protective shell. The particular architecture affords robust mechanical support, abundant buffering space and enhanced electrical conductivity, thus effectively accommodating drastic volume variation during repetitive Li+ intercalation/ extraction. The Si/MoS2@C hybrid delivers a high initial discharge specific capacity of 1257.8 mA hg^-1 and exhibits a reversible capacity of 767.52 m A hg^-1 at a current density 100 mA g'1 after 250 cycles. Most impressively, the electrode depicts a superior long-cycling durability with a discharge capacity of 537.6 mA hg^-1 even after 1200 cycles at a current density of 500 m A g^-1. Meanwhile, the hybrid also shows excellent rate performance such as 388.1 mA h g^-1 even at a large current density of 3000 mA g^-1.

A hierarchically 3 D structured milled lamellar MoS2/nano-silicon@carbon hybrid with medium capacity and long-term lifespan is designed by a green and scalable approach using ball milling process and spraydrying/pyrolysis routes.The microspheres consist of low-content nano-silicon（20 wt%）,milled lamellar MoS2 sheets and porous carbon skeletons.A mixture of silicon nanoparticles and MoS2 flakes serves as an inner core,while porous carbon pyrolyzed from petroleum pitch acts as a protective shell.The particular architecture affords robust mechanical support,abundant buffering space and enhanced electrical conductivity,thus effectively accommodating drastic volume variation during repetitive Li+ intercalation/extraction.The Si/MoS2@C hybrid delivers a high initial discharge specific capacity of 1257.8 mA hg-1and exhibits a reversible capacity of 767.52 mAhg-1 at a current density 100 mAg-1after 250 cycles.Most impressively,the electrode depicts a superior long-cycling durability with a discharge capacity of537.6 mA hg-1even after 1200 cycles at a current density of 500 mAg-1.Meanwhile,the hybrid also shows excellent rate performance such as 388.1 mA hg-1even at a large current density of 3000 mAg-1.