FeSn2-Polyacrylonitrile Electrode Obtained by Using High-Intensity Ultrasonication

The high intensity ultrasonication treatment allows the formation of FeSn2 nanoparticles encapsulated in an organic matrix of polyacrylonitrile. The polymeric matrix stabilizes the intermetallic particles and improves the electrochemical cycling behavior in lithium batteries. For FeSn2@PAN, a capacity of 360 mAh/g (referred to the mass of iron and tin atoms or 418 mAh/g refereed to the mass of tin) is observed after 60 cycles, with a capacity loss of 12.8% from the cycle 10 to 60, while for PAN-free FeSn2 the capacity drop from cycle 20 to 30 is 20%. (C) 2011 The Electrochemical Society. [DOI:10.1149/1.3611014] All rights reserved.