The positive influence of graphene on the mechanical and electrochemical properties of SnxSb-graphene-carbon porous mats as binder-free electrodes for Li+ storage

摘要: Abstract SnSb alloys with high theoretical capacities for lithium-ion batteries always suffer from the quick capacity fading owing to their huge volume change. In this study, nanoparticles are fixed in nanochannels of flexible mats composed graphene, and multichannel porous carbon nanofiber which prepared by electrospinning subsequent thermal treatment at 700 °C Ar/H 2 . The can be bent 180 degree without any crack unfolded as usual. As binder-free anodes, suitable ratio GO precursor solution show discharge 617 mA h/g 300th cycle a current density 100 mA/g, much higher than those similar nanofibers added more or less GO. deliver rate 369 mA h/g 2 A/g, also nanofibers. electronic tests that graphene asrising linearly improve conductivity mats. enhanced properties Sn x Sb-graphene-carbon attributed improved mechanical property due presence multichannels accommodate change Sb during lithiation/delithiation, provide high-way diffusion channels electrons ions. It is believed method combined could useful approach prepare supercapacitors, batteries, fuel cells.