Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 7, Pages 2634-2640Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am400055a
Keywords
three-dimensional; Ni/SnOx/C nanostructured arrays; lithium-ion microbatteries; anode; enhanced areal capacity
Funding
- National Natural Science Foundation of China [51170285, 51102105]
- Natural Science Foundation of Hubei Province [2011CDB154]
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The areal capacity of lithium-ion microbatteies (LIMBs) can be potentially increased by adopting a three-dimensional (3D) architectured electrode. Herein, we report the novel 3D Ni/SnOx/C hybrid nanostructured arrays that were built directly on current collectors via a facile hydrothermal method followed by a calcination-reduction process. Branched SnO2 nanorods grew uniformly on Ni-2(OH)(2)CO3 nanowall arrays, resulting in the formation of precursors with a 3D interconnected architecture. By using ethylene glycol as the reducing agent, the glucose-coated SnO2/Ni-2(OH)(2)CO3 precursors were evolved into an interesting 3D Ni/SnOx/C hybrid nanostructured arrays within the calcination treatment. Compared to conventional 2D SnOx/C nanorod arrays, the electrode of 3D Ni/SnOx/C hybrid nanostructured arrays exhibited enhanced lithium storage capacity per unit area, preferable rate capability and improved cycling performance when tested for LIMBs. The superior performance might be attributed to the open-up Ni frameworks that can not only serve as effective channels for electrons transport and Li+ diffusion but also help to accommodate the large volume changes upon lithiation/delithiation.
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