Multi-Layer Graphene/SnO2 Nanocomposites as Negative Electrode Materials for Lithium-Ion Batteries

摘要

We report the synthesis of SnO_(2)/multi-layer graphene nanocomposites by an easy low temperature (60 °C) electroless plating route. An aqueous suspension containing Sn(BF_(4))_(2) with multi-layer graphene is reacted at 60 °C in an acidic environment for 1 h, and Na_(2)S_(2)O_(4) is used to reduce tin ion from Sn(BF_(4))_(2). After electroless plating, the presence of SnO_(2) particle (15–35 nm) attached to the multi-layer graphene is confirmed by transmission electron microscopy. Tin oxide (SnO_(2)) can be used to modify multi-layer graphene via electroless plating process decorating with oxygen-containing functional groups. It is found that the electroless plating has enhanced the electrochemical performance of SnO_(2) and multi-layer graphene that shows reasonably good capacity (～243 mAh g~(?1) after 50 charge/discharge cycles) and high Coulombic efficiency (～78%).