Preparation and Electrochemical Performance of Reduced Graphene and SnO₂ Nanospheres Composite Materials for Lithium‐Ion Batteries and Sodium‐Ion Batteries

Abstract

SnO 2 has been considered a promising anode material for lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) owing to the high capacity, and environmental friendliness. In this study, a mixture of reduced graphene oxide and SnO 2 nanospheres (SnO 2 NPs) was prepared via a simple method in the solution of graphene oxide (GO), Vitamin C and SnO 2 . Vitamin C plays an important role in reducing graphene oxide. In addition, graphene can alleviate volume changes of SnO 2 as host and induce effective charge transfer through its interconnected network structure. As a consequence, the SnO 2 NPs/ rGO-1composite exhibits excellent reversible capacity and cycling stability (400 mA h g À 1 at 1000 mA g À 1 after 100 cycles for LIBs and 212 mA h g À 1 at 100 mA g À 1 after 100 cycles for SIBs). The simple, economical, and environmentally friendly synthetic route will be of great significance to the design of anode materials for LIBs and SIBs in the future.

Applications of graphene-based composites in the anode of lithium-ion batteries

“…SnO 2 nanomaterials have attracted widespread attention due to their high theoretical capacity (790 mAh g −1 ), high specific surface area and low synthesis cost (Chen et al, 2021). In 2009, Honma et al first assembled a 3D layered SnO 2 /graphene electrode with a reversible capacity of 810 mAh g −1 .…”