During battery charge/discharge, various physical and chemical processes usually occur in the electrode material, such as volume changes, structural and electronic transitions and structural degradation. These processes significantly influence the electrochemical behavior and therefore have to be studied in detail to maintain or improve the battery performance.
Operando X-ray diffraction (XRD) and Operando X-ray absorption spectroscopy (XAS) are efficient and complementary analytical methods which allow to understand physical and chemical changes in electrode materials during battery operation.
At the EBZ Dresden a detailed characterization of novel silicon anodes and oxide cathodes will be performed using Operando-XRD and XAS. The aim is to understand the underlying redox and degradation mechanisms and to develop new materials with increased energy density and cycle stability.