Enhanced Electrochemical Performance of Fe-Sn Alloy with Cu Additive As Anode in Lithium-Ion Batteries

Thursday, 5 October 2017: 11:50
Maryland C (Gaylord National Resort and Convention Center)
F. Xin, H. Zhou, D. Ji, X. Wang, J. Ding, Y. Shi (Binghamton University), F. Omenya (NECCESS at Binghamton University), N. A. Chernova (Binghamton University), and M. S. Whittingham (NECCES at Binghamton University)
Tin based alloys have attracted much attention as one of the promising anode materials because of their higher gravimetric/volumetric capacity and safer thermodynamic potential for next generation lithium-ion batteries. Ultrasmall Fe-Sn alloy with Cu additive (Fe-Sn-(Cu)) was synthesized using Sn nanoparticles as template by modified polyol method. Compared with Fe-Sn alloy, the cycling performance and rate capability were largely enhanced when Fe-Sn-(Cu) alloy was used as anode with the average loading weight of 1.5 mg/cm2. It could deliver 465 mAh/g after 200 cycles at the C/2 rate, corresponding to an average capacity loss of only 0.08% per cycle. The calculated volumetric capacity was more than 1.5 times of commercial carbon. It also has exceptional rate capability, delivering 91.9%, 82.6%, 74.4%, 63.5% of the 0.1C capacity (557 mAh/g) at 0.2C, 0.5C, 1C and 2C, respectively. Fe-Sn-(Cu) alloy with higher capacity and enhanced cycling performance may become a potential candidate as anode in lithium-ion battery. This work is supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) program under Award No. DE-EE0006852.