Direct visualization of sulfur cathodes: new insights into Li-S batteries via <i>operando</i> X-ray based methods.

ABSTRACT: As the need for the development of "beyond lithium" ion battery technologies continuous unabated, lithium sulfur batteries have attracted widespread attention due to their very high theoretical energy density of 2,600 Wh kg^-1. However, despite much effort, the detailed reaction mechanism remains poorly understood. In this study, we have combined operando X-ray diffraction and X-ray microscopy along with X-ray tomography, to visualize the evolution of both the morphology and crystal structure of the materials during the entire battery cycling (discharging/charging) process. The dissolution and reformation of sulfur clusters is clearly observed during cycling. In addition, we demonstrate, for the first time, the critical role of current density and temperature in determinin

SUBMITTER: Yu SH 

PROVIDER: S-EPMC9037110 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature