A robust strategy for stabilizing SnO 2 : TiO 2 -supported and carbon-immobilized TiO 2 /SnO 2 /C composite towards improved lithium storage

With a much higher theoretical capacity than that of graphite anodes, SnO 2 has attained great attention as a potential anode material for next-generation lithium-ion batteries. However, it's practical application yet be impeded by such disadvantages of poor conductivity and terrible structure stability during repeated discharge/charge process. Herein, a unique TiO 2 /SnO 2 /C hybrid (TiO 2 SS@SnO 2 @C) consist of one-dimensional TiO 2 nanobelts, zero-dimensional SnO 2 nanoparticles and conformal carbon coating has been fabricated based on a strategy of synergistic effect of components with different dimensional nanostructures, which can provide improved electrochemical kinetic and outstanding structure stability for the TiO 2 SS@SnO 2 @C. As a result, the TiO 2 SS@SnO 2 @C is able to exhibit outstanding lithium storage performance as an anode material, delivering capacities of 904.9 and 492.4 mAhh g −1 after even 400 cycles at 200 and even 1000 mA g −1, respectively. It is demonstrated that the synergistic effect of these components is responsible for thus outstanding electrochemical performance.