Hexagonal Sb Nanocrystals as High-Capacity and Long-Cycle Anode Materials for Sodium-Ion Batteries

Abstract

Antimony (Sb) is regarded as a promising anode material for sodium ion batteries (SIBs) on account of its high theoretical specific capacity (∼660 mAh g–1) and low cost. However, the large volume expansion (∼390%) during charging has inhibited its practical application. Herein, hexagonal Sb nanocrystals encapsulated by P/N-co-doped carbon nanofibers (Sb@P-N/C) were prepared using a low-cost but mass-produced electrospinning method. The as-prepared Sb@P-N/C, used as anode material for SIBs, exhibits unexpected cycling stability and rate capability, with 500.1 mAh g–1 at 50 mA g–1 after 200 cycles and 295.6 mAh g–1 at 500 mA g–1 after 400 cycles. Especially, the full battery fabricated by Na (Ni1/3Fe1/3Mn1/3) O2 || Sb@P-N/C possesses a reversible specific capacity of 66.8 mAh g–1 at 50 mA g–1 over 60 cycles. This simple and low-cost fabrication technology combined with unique crystal morphology offers new strategies for the advancement of sodium ion batteries (SIBs) in energy storage and electrical transportation.

Bismuth-Antimony Alloy Nanoparticles Embedded in 3D Hierarchical Porous Carbon Skeleton Film for Superior Sodium Storage

“…Electrochemical impedance spectroscopy (EIS) is performed on BiSb@CSF-0.5 to reveal its charge transport kinetics ( Figure 5 c). The Nyquist plots are fitted with a classical equivalent circuit model [ 7 , 32 , 41 ]. CPE1 and CPE2 represent the constant phase elements.…”

“…Sodium-ion batteries (SIBs) are considered a competitive alternative to LIBs because of the natural abundance and low cost of sodium (Na) [ 1 , 2 , 3 , 4 ]. Many efforts have been devoted to developing the electrode materials of SIBs, particularly anode materials [ 5 , 6 , 7 , 8 , 9 ]. Various carbonaceous materials and transition metal oxides have been studied as anode materials for SIBs [ 10 , 11 , 12 ].…”

Flower‐like Hierarchical Ti3C2Tx@MoS2/Nitrogen‐doped Carbon Composite as High‐performance Anodes for Sodium‐ion Batteries

“…[9,10] In addition, the large size of the Na + inevitably leads to hysteresis reaction kinetics and a tremendous volume expansion of the electrode materials during Na + insertion. [11][12][13] Therefore, it becomes critical to explore novel high-performance anode materials to facilitate the early commercial production application of SIBs.…”

“…Since the weight and radius of Na + is larger than that of Li + , graphite, a commercial LIB anode material with a small layer spacing, is not suitable for sodium storage [9,10] . In addition, the large size of the Na + inevitably leads to hysteresis reaction kinetics and a tremendous volume expansion of the electrode materials during Na + insertion [11–13] . Therefore, it becomes critical to explore novel high‐performance anode materials to facilitate the early commercial production application of SIBs.…”

Controllable Fabrication of Sn/Sb Nanodomains Improved Sb2SnO5 Anodes for Sodium Ion Batteries

“…[1][2][3] The larger ionic radius (1.02 Å) of Na + compared to that of Li + (0.76 Å), as well as the sluggish diffusion kinetics and enormous volume variation of active materials during the charging/discharging process are the main challenges faced by the SIBs, which stimulating to find suitable electrode materials with high capacity and prolonged life. [4][5][6] So far, the property of Na + ions storage has been studied in varied substances, such as the carbon-based materials, [7][8][9] alloy-based composite, [10][11][12][13][14] and metal oxides, [15][16][17] etal. Of which, the metal oxide Sb 2 SnO 5 has a considerable theoretical capacity of 590.8 mAh g À 1 and low cost that shows a great potential prospect.…”