TOF-SIMS Analysis of Lithium Reaction Products on Electrodes of Lithium Air Batteries

Abstract

For TOF-SIMS characterization of lithium reaction products on electrodes of lithium air batteries (LAB), characteristic secondary ion species were found for identification and differentiation of their chemical states utilizing gas cluster ion beam (GCIB) sputtering for surface stabilization. Lithium peroxide and related products such as carbonate and formate were identified and confirmed under coexistence of electrolyte components to be produced on the real LAB carbon cathode by conducting discharge experiments using ¹⁸O₂ reaction gas, which would be suitable method for further investigation on mechanisms of related electrode reactions. [DOI: 10.1380/ejssnt.2014.75]