Direct and in situ examination of Li+ transport kinetics in an isotope-labeled solid–electrolyte interphase

Proceedings of the National Academy of Sciences, Volume 122, Issue 45, November 2025. <br/>SignificanceThe solid–electrolyte interphase (SEI) has long been recognized as the most critical yet least understood component in lithium-ion batteries, particularly in terms of Li+transport mechanisms. This study directly addresses the question of how …