Reaction Mechanism of a Ag[sub 36.4]Sb[sub 15.6]Sn[sub 48] Nanocomposite Electrode for Advanced Li-Ion Batteries

Abstract

The phase transformations of an nanocomposite electrode, were investigated during electrochemical lithium insertion/extraction. The high performance gives 410 mAh/g for 300 cycles. Electrodes were prepared at selected voltage points in the discharge-charge curves and high-energy synchrotron X-ray data was collected in order to study the reaction mechanism in detail. Both and SbSn insert Li stepwise to form compounds with the partial compositions and At lower voltages, AgLi, and could be observed. The intermetallic compounds before and after lithiation have a strong crystallographic relation. © 2004 The Electrochemical Society. All rights reserved.