Morphology effect on the performances of SnO2 nanorod arrays as anodes for Li-ion batteries

Abstract Ni foam suppported-SnO 2 nanorod arrays with controllable diameter were prepared via a template-free growth method, which was a convenient route for the large-scale growth of pure-phase metal oxide nanorod arrays on metal substrates. The relationship between electrochemical behavior and the shape of SnO 2 nanorod arrays has been investigated in detail. SnO 2 nanorod arrays with diameter of about 25 nm, as anode materials for Li-ion batteries revealed a capacity of 607 mAh g −1 (at 0.2 C) up to 50 cycles. The superior performance of the SnO 2 nanorods can be mainly attributed to small size of nanorods which reduce volume expansion and lithium diffusion length.

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