Abstract
Three-dimensional (3-D) porous copper with stable pore structure is prepared by electroless plating. 3-D porous Sn–Co alloy/carbon nanotube (CNT) composite is synthesized by electrodeposition using 3-D porous copper as the substrate. The scanning electron microscope results indicate that 3-D porous Sn–Co alloy/CNT composite contains a large amount of interconnected pores with the diameter size of ~3 μm. Upon cycling, the pore structure gradually disappears, but no serious exfoliation appears due to porous structure and reinforcement by CNT. The charge/discharge results demonstrate that the 3-D porous Sn–Co alloy/CNT composite electrode delivers high first reversible specific capacity of 490 mAh g−1, and remains 441 mAh g−1 after 60 cycles tested at different current densities. Even at the current density of 3,200 mA g−1, the reversible specific capacity remains 319 mAh g−1, which is 65 % of the first specific capacity cycled at the current density of 100 mA g−1.
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Acknowledgments
This work was financially supported by National Natural Science Foundation of China (grant no. 20903016), Cultivation Fund of the Key Scientific and Technical Innovation Project, Ministry of Education of China (grant no. 708084), National Natural Science Foundation of China (grant no. 21073021), the Special Fund for Basic scientific Research of Central Colleges, Chang’an University (grant no. CHD2010JC006).
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Fan, XY., Shi, YX., Wang, JJ. et al. Electrochemical synthesis and lithium storage properties of three-dimensional porous Sn–Co alloy/CNT composite. Ionics 19, 1551–1558 (2013). https://doi.org/10.1007/s11581-013-0895-0
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DOI: https://doi.org/10.1007/s11581-013-0895-0