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A self-assembled 3D urchin-like Ti₀.₈Sn₀.₂O₂–rGO hybrid nanostructure as an anode material for high-rate and long cycle life Li-ion batteries

Dong, Yutao, Li, Dan, Gao, Chengwei, Liu, Yushan, Zhang, Jianmin
Journal of materials chemistry A 2017 v.5 no.17 pp. 8087-8094
anodes, electrochemistry, lithium batteries, nanomaterials, tin dioxide, titanium dioxide
The controllable synthesis of electrode materials with unique nanostructures, high specific surface areas, and excellent electrochemical performance is crucially demanded for lithium-ion power batteries. In this paper, a 3D urchin-like Ti₀.₈Sn₀.₂O₂–rGO hybrid nanostructure was successfully fabricated by a one-step hydrothermal process based on the coordination principle and molecular self-assembly theory. This novel graphene-supported Ti₀.₈Sn₀.₂O₂ solid solution material efficiently combined the mechanical stability of TiO₂ and high capacity of SnO₂, leading to excellent electrochemical activity and superior cycling stability. High specific capacities of about 430 mA h g⁻¹ at a current density of 0.5 A g⁻¹ and 400 mA h g⁻¹ after 500 cycles at 1 A g⁻¹ with an efficiency of nearly 100% were achieved. This strategy could be applied to develop novel structures as electrode materials with facile synthesis, low cost, and high performance.