Electrochemical Properties & Local Structure Of Tin Borate Glasses For Lithium Secondary Batteries

SnO-B2O3 glasses were prepared by melt quenching & mechanical milling. SnO-B2O3 glasses had relatively low glass transition temperatures & worked as high capacity reversible electrode materials in lithium cells with, not only liquid electrolytes, but also solid electrolytes. The thermal & electrochemical properties of the glasses were closely related to the local structure around the boron atoms in the glass network. The relationship between reversible capacity & local structure of glasses are discussed on the basis of the electrochemical Li insertion mechanism. The electrochemical performance of the SnO-based glassy electrodes depended on the charge-discharge cutoff voltages & the local structure of the glasses.