|Title||Ultrafast laser induced breakdown spectroscopy of electrode/electrolyte interfaces|
|Publication Type||Journal Article|
|Year of Publication||2012|
|Authors||Vassilia Zorba, Jaroslaw S Syzdek, Xianglei Mao, Richard E Russo, Robert Kostecki|
|Journal||Applied Physics Letters|
|Keywords||electrochemical electrodes, graphite, high-speed optical techniques, laser beam effects, organic compounds, pyrolysis, solid electrolytes|
Direct chemical analysis of electrode/electrolyte interfaces can provide critical information on surface phenomena that define and control the performance of Li-based battery systems. In this work, we introduce the use of ex situ femtosecond laser induced breakdown spectroscopy to probe compositional variations within the solid electrolyte interphase (SEI) layer. Nanometer-scale depth resolution was achieved for elemental and molecular depth profiling of SEI layers formed on highly oriented pyrolytic graphite electrodes in an organic carbonate-based electrolyte. This work demonstrates the unique ability of ultrafast laser spectroscopy as a highly versatile, light element-sensitive technique for direct chemical analysis of interfacial layers in electrochemical energy storage systems.