Porous SnO2-CuO nanotubes for highly reversible lithium storage

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Facile synthesis of rationally designed structures is critical to realize a high performance electrode for lithium-ion batteries (LIBs). Among different candidates, tin(IV) oxide (SnO2) is one of the most actively researched electrode materials due to its high theoretical capacity (1493 mAh g−1), abundance, inexpensive costs, and environmental friendliness. However, severe capacity decay from the volume expansion and low conductivity of SnO2 have hampered its use as a feasible electrode for LIBs. Rationally designed SnO2-based nanostructures with conductive materials can be an ideal solution to resolve such limitations. In this work, we have successfully fabricated porous SnO2-CuO composite nanotubes (SnO2-CuO p-NTs) by electrospinning and subsequent calcination step. The porous nanotubular structure is expected to mitigate the volume expansion of SnO2, while the as-formed Cu from CuO upon lithiation allows faster electron transport by improving the low conductivity of SnO2. With a synergistic effect of both Sn and Cu-based oxides, SnO2-CuO p-NTs deliver stable cycling performance (91.3% of capacity retention, ∼538 mAh g−1) even after 350 cycles at a current density of 500 mA g−1, along with enhanced rate capabilities compared with SnO2.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2018-01
Language
English
Article Type
Article
Keywords

ION BATTERY ANODE; ELECTRON-MICROSCOPY; SCALE SYNTHESIS; HIGH-CAPACITY; PERFORMANCE; COMPOSITE; NANOCRYSTALS; DESIGN; NANOSTRUCTURES; CHALLENGES

Citation

JOURNAL OF POWER SOURCES, v.373, pp.11 - 19

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2017.10.090
URI
http://hdl.handle.net/10203/238754
Appears in Collection
MS-Journal Papers(저널논문)
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