Synthesis and electrochemical properties of multi-layered SnO/rGO composite as anode materials for sodium ion batteries

Metal oxide-based anodes have gained attention with their high theoretical capacity for Sodium-Ion Batteries (SIBs). However, their practical application is restricted due to huge volume expansion and low electronic conductivity caused by continuous cycling. This paper uses tin oxide/reduced graphene oxide (SnO/rGO) composites to solve the problems of low discharge capacity and poor cycling stability. The SnO/rGO nano -composite electrode exhibits improved specific capacity, superior stability, and excellent rate property (a discharge capacity of 391.9 mAh/g at 100 mA/g after 120 cycles with capacity retention of 96.2 % and 338.7 mAh/g at 500 mA/g after 500 cycles with capacity retention of 92.2 %). Also, ex-situ XRD measurements are conducted to analyze the Na+ storage process in SnO. This study aims to expand the prospects of SnO/rGO nanocomposite anode for application in SIBs.