SnO2 encapsulated TiO2 hollow nanofibers as anode material for lithium ion batteries

Nanoparticulate SnO2 was encapsulated into TiO2 hollow nanofibers to achieve high energy density and robust electrochemical performance as an anode material for lithium ion batteries. The SnO2 encapsulated TiO2 hollow nanofibers exhibit improved electrochemical performances over the TiO2 hollow nanofibers, including a high discharge capacity of ~ 517 mAh g− 1 and doubled capacity at a 10 C rate. These improvements on electrochemical performances are attributed to favorable mechanics and kinetics associated with lithium.

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► SnO2 nanoparticles encapsulated into TiO2 hollow nanofibers were synthesized.
► A facile coaxial electrospinning method was exploited.
► The rigid TiO2 hollow shell confined the volume expansion of SnO2 nanoparticles.
► This material shows excellent electrochemical performance.