XPS INVESTIGATION OF LITHIUM BORATE GLASS AND THE LI LIBO2 INTERFACE/

X-ray photoelectron spectroscopy (XPS) was used to examine the surface s of vacuum-fractured lithium borate glasses with composition of xLi2O -(1 - x)B2O3 for x = 0, 0.1, 0.2, and 0.3 and the vapor-deposited thin -film LiBO2. Binding energies for the Li 1s, B 1s and O 1s peaks have been determined, referenced to the Au 4f7/2 peak of a thin gold overla yer. The Li/LiBO2 interface was investigated by a sequence of depositi ons of lithium onto a LiBO2 surface followed by in situ XPS scans. Obs erved changes in XPS spectra of the interface region provide evidence of compositional and structural changes within the lithium borate film as a result of the lithium deposition.