An in-depth Study of the Solid Electrolyte Interphase Compositional Evolution in Sodium-Ion Batteries: Unravelling the Effects of a Na Metal Counter Electrode on the SEI.

ABSTRACT: A comprehensive understanding of the solid electrolyte interphase (SEI) is crucial for ensuring long-term battery stability. This is particularly pertinent in sodium-ion batteries (NIBs), where the SEI remains poorly understood, and investigations are typically undertaken in half-cell configurations with sodium metal as the counter electrode. Na metal is known to be highly reactive with common carbonate-based electrolytes; nevertheless, its effects on SEI formation at the working electrode are largely unexplored. This work investigates the evolution of the SEI in NIBs during cycling, with an emphasis on the consequences of using a sodium metal counter electrode. Advanced analytical techniques, including hard X-ray photoelectron spectroscopy (HAXPES) and time-of-flight secondary ion mass sp

SUBMITTER: Fitzpatrick JR 

PROVIDER: S-EPMC12407315 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature