The Significant Role of Solid Oxide Interphase in Enhancement of Cycling Performance of Sn Thin-Film Anodes

Abstract

Sn thin-film anodes have been prepared by radio-frequency magnetron sputtering with additional anode shielding on the sputter gun. The anode shielding effectively reduced kinetic energy of the adatoms during deposition, and the deposited thin films were X-ray amorphous and exhibited fine and smooth morphology with nanoparticles (5-10 nm) uniformly dispersed on the surface. By changing the charge-discharge scheme and deliberately depositing a Sn O2 surface coating, the properties of the solid electrolyte interphase of these anodes can be modulated. The cycling properties of the Sn thin films with deliberate Sn O2 surface coating are significantly improved. © 2006 The Electrochemical Society.