Solvation-driven Kinetics and Interphase Engineering for Organic Electrode towards Sodium Storage

Abstract

While prior studies have primarily attributed the performance enhancement of organic electrodes in ether-based electrolytes to their good compatibility, this work roots the performance improvement in a complete causal chain centered on solvation-driven interfacial kinetics and interphase composition. Using trisodium 1,2,4-benzenetricarboxylate as a model case, we systematically dissect the disparities between ester (0.8 M NaPF6 in EC/DEC) and ether (0.8 M NaPF6 in DME) electrolytes, demonstrating that the latter’s optimized solvation structure enables accelerated interfacial kinetics and an inorganic-rich interphase, synergistic unlocking superior electrochemical performance.