Operando characterization of cathodic reactions in a liquid-state lithium-oxygen micro-battery by scanning transmission electron microscopy.

ABSTRACT: Rechargeable non-aqueous lithium-oxygen batteries with a large theoretical capacity are emerging as a high-energy electrochemical device for sustainable energy strategy. Despite many efforts made to understand the fundamental Li-O₂ electrochemistry, the kinetic process of cathodic reactions, associated with the formation and decomposition of a solid Li₂O₂ phase during charging and discharging, remains debate. Here we report direct visualization of the charge/discharge reactions on a gold cathode in a non-aqueous lithium-oxygen micro-battery using liquid-cell aberration-corrected scanning transmission electron microscopy (STEM) combining with synchronized electrochemical measurements. The real-time and real-space characterization by time-resolved STEM reveal

SUBMITTER: Liu P 

PROVIDER: S-EPMC5816613 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature