Growth of SnO(2) Nanoflowers on N-doped Carbon Nanofibers as Anode for Li- and Na-ion Batteries

It is urgent to solve the problems of the dramatic volume expansion and pulverization of SnO(2) anodes during cycling process in battery systems. To address this issue, we design a hybrid structure of N-doped carbon fibers@SnO(2) nanoflowers (NC@SnO(2)) to overcome it in this work. The hybrid NC@SnO(2) is synthesized through the hydrothermal growth of SnO(2) nanoflowers on the surface of N-doped carbon fibers obtained by electrospinning. The NC is introduced not only to provide a support framework in guiding the growth of the SnO(2) nanoflowers and prevent the flower-like structures from agglomeration, but also serve as a conductive network to accelerate electronic transmission along one-dimensional structure effectively. When the hybrid NC@SnO(2) was served as anode, it exhibits a high discharge capacity of 750 mAh g(−1) at 1 A g(−1) after 100 cycles in Li-ion battery and 270 mAh g(−1) at 100 mA g(−1) for 100 cycles in Na-ion battery, respectively. [Image: see text] ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s40820-017-0172-2) contains supplementary material, which is available to authorized users.