Journal
ADVANCED ENERGY MATERIALS
Volume 8, Issue 19, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201703237
Keywords
in situ high-temperature XRD; lithium-ion batteries; N-doped carbon hollow nanotubes; Sb anodes; sodium-ion batteries
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Funding
- National Key Research and Development Program of China [2016YFA0202603]
- National Basic Research Program of China [2013CB934103]
- National Natural Science Foundation of China [51521001, 51602239]
- National Natural Science Fund for Distinguished Young Scholars [51425204]
- Yellow Crane Talent (Science & Technology) Program of Wuhan City
- Fundamental Research Funds for the Central Universities [WUT: 2016III001, 2016III003, 2016IVA090]
- China Scholarship Council [201606955096]
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Antimony (Sb) has emerged as an attractive anode material for both lithium and sodium ion batteries due to its high theoretical capacity of 660 mA h g(-1). In this work, a novel peapod-like N-doped carbon hollow nanotube encapsulated Sb nanorod composite, the so-called nanorod-in-nanotube structured Sb@N-C, via a bottom-up confinement approach is designed and fabricated. The N-doped-carbon coating and thermal-reduction process is monitored by in situ high-temperature X-ray diffraction characterization. Due to its advanced structural merits, such as sufficient N-doping, 1D conductive carbon coating, and substantial inner void space, the Sb@N-C demonstrates superior lithium/sodium storage performance. For lithium storage, the Sb@N-C exhibits a high reversible capacity (650.8 mA h g(-1) at 0.2 A g(-1)), excellent long-term cycling stability (a capacity decay of only 0.022% per cycle for 3000 cycles at 2 A g(-1)), and ultrahigh rate capability (343.3 mA h g(-1) at 20 A g(-1)). For sodium storage, the Sb@N-C nanocomposite displays the best long-term cycle performance among the reported Sb-based anode materials (a capacity of 345.6 mA h g(-1) after 3000 cycles at 2 A g(-1)) and an impressive rate capability of up to 10 A g(-1). The results demonstrate that the Sb@N-C nanocomposite is a promising anode material for high-performance lithium/sodium storage.
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