Melt-Spun Fe-Sb Intermetallic Alloy Anode for Performance Enhanced Sodium-Ion Batteries

作者：Edison Eldho; Sreejith Sivaramapanicker^*; Madhavi Srinivasan^*

来源：ACS Applied Materials & Interfaces, 2017, 9(45): 39399-39406.

DOI：10.1021/acsami.7b13096

• energy storage
• sodium-ion batteries
• intermetallic alloy electrodes
• melt-spinning
• Fe-Sb anode
• coin-cell
• battery

Owing to the high theoretical sodiation capacities, intermetallic alloy anodes have attracted considerable interest as electrodes for next-generation sodium-ion batteries (SIBs). Here, we demonstrate the fabrication of intermetallic Fe-Sb alloy anode for SIBs via a high-throughput and industrially viable melt-spinning process. The earth abundant and low-cost Fe-Sb-based alloy anode exhibits excellent cycling stability with nearly 466 mAh g(-1) sodiation capacity at a specific current of SO mA g(-1) with 95% capacity retention after 80 cycles. Moreover, the alloy anode displayed outstanding rate performance with-300 mAh sodiation capacity at 1 A g(-1). The crystalline features of the melt-spun fibers aid in the exceptional electrochemical performance of the alloy anode. Further, the feasibility of the alloy anode for real-life applications was demonstrated in a sodium-ion full-cell configuration which could deliver a sodiation capacity of over 300 mAh g(-1) (based on anode) at 50 mA g(-1) with more than 99% Coulombic efficiency. The results further exhort the prospects of melt spun alloy anodes to realize fully functional sodium-ion batteries.

• 出版日期2017-11-15
• 单位南阳理工学院