Bottom‐Up Confined Synthesis of Nanorod‐in‐Nanotube Structured Sb@N‐C for Durable Lithium and Sodium Storage |
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Authors: | Wen Luo Feng Li Jean‐Jacques Gaumet Pierre Magri Sébastien Diliberto Liang Zhou Liqiang Mai |
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Affiliation: | 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, P. R. China;2. Laboratoire de Chimie et Physique: Approche Multi‐échelles des Milieux Complexes (LCP‐A2MC), Institut Jean Barriol, Université de Lorraine, Metz, France;3. Institut Jean Lamour, UMR CNRS 7198, Université de Lorraine, Campus Artem, Nancy, France;4. Department of Chemistry, University of California, Berkeley, CA, USA |
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Abstract: | 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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Keywords: | in situ high‐temperature XRD lithium‐ion batteries N‐doped carbon hollow nanotubes Sb anodes sodium‐ion batteries |
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