title: Hybrid tin oxide nanowires as stable and high capacity anodes for Li-ion batteries.
abstract: In this report, we present a simple and generic concept involving metal nanoclusters supported on metal oxide nanowires as stable and high capacity anode materials for Li-ion batteries. Specifically, SnO(2) nanowires covered with Sn nanoclusters exhibited an exceptional capacity of >800 mAhg(-1) over hundred cycles with a low capacity fading of less than 1% per cycle. Post lithiation analyses after 100 cycles show little morphological degradation of the hybrid nanowires. The observed, enhanced stability with high capacity retention is explained with the following: (a) the spacing between Sn nanoclusters on SnO(2) nanowires allowed the volume expansion during Li alloying and dealloying; (b) high available surface area of Sn nanoclusters for Li alloying and dealloying; and (c) the presence of Sn nanoclusters on SnO(2) allowed reversible reaction between Sn and Li(2)O to produce both Sn and SnO phases.
authors.affiliation: Department of Chemical Engineering, University of Louisville, Louisville, Kentucky 40292, USA.
authors.forename: Praveen
authors.initials: P
authors.lastname: Meduri
authors.forename: Chandrashekhar
authors.initials: C
authors.lastname: Pendyala
authors.forename: Vivekanand
authors.initials: V
authors.lastname: Kumar
authors.forename: Gamini U
authors.initials: GU
authors.lastname: Sumanasekera
authors.forename: Mahendra K
authors.initials: MK
authors.lastname: Sunkara