Wen Luo1,2, Feng Li3,2, Jean‐Jacques Gaumet1, Pierre Magri1, Sébastien Diliberto4, Liang Zhou2, Liqiang Mai5,2
1Laboratoire de Chimie et Physique: Approche Multi‐échelles des Milieux Complexes (LCP‐A2MC) Institut Jean Barriol Université de Lorraine Metz 57070 France
2State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P.R. China
3Institut Jean Lamour
4Institut Jean Lamour UMR CNRS 7198 Université de Lorraine Campus Artem 2 allée André Guinier Nancy 54000 France
5Department of Chemistry, University of California, Berkeley, CA 94720 USA
Tóm tắt
AbstractAntimony (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.
