Synthesis of silicon-tin/nitrogen-doped reduced graphene oxide nanocomposite as anode materials for lithium-ion batteries

Abstract

Abstract Silicon (Si) and Tin (Sn) have been demonstrated as high energy density anode materials in Lithium ion batteries due to their high theoretical capacity. However, the major problem with these metals is its large volume change during cycling, which results in cracking and climbing of the electrode. The effective solution is to employ the nano-sized Si, Sn and nanocomposite especially with carbon medium supporting. In this work, nitrogen-doped reduced graphene oxide (NrGO) was synthesized by simple chemical process. These NrGO were used as carbon supporting in the composite of Si and Sn. Percentages of Si and Sn in composite were varied as 10, 15 and 20 percent. The XRD results showed that Si and Sn were incorporated with NrGO. SEM and TEM results indicated that nano-sized Si and Sn particles were well dispersed on NrGO.