Capacity Contribution Mechanism of rGO for SnO2/rGO Composite as Anode of Lithium-ion Batteries

Abstract Compared with ordinary graphite anode, SnO 2 possesses higher theoretical specific capacity, rich raw materials and low price. While the severe volume expansion of during lithium-ion extraction/intercalation limits its further application. To solve this problem, in work reduced graphene oxide (rGO) was introduced as buffer matrix . Herein, /rGO composite is obtained through one-step hydrothermal method. Three-dimensional structure rGO could effectively hinder polymerization nanoparticles provide more lithium storage sites attributed to high surface area density defects. The initial discharge capacity cathode 959 mA·h·g -1 remained at 300 after 1000 cycles 1 C. It proved that added anode has a contribution battery. changes mechanism from diffusion process dominance driven capacitive contribution. Due addition rGO, material gains stable great conductivity.