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(top) Anion-dominated Li solvation structure formed by weakly solvating TFMSPyr solvent with LiFSI salt showing two anion participation in primary solvation shell, and (bottom) HR-STEM image showing the formation of a robust thin CEI (Cathode-Electrolyte Interphase).
Scientific Achievement: Weakly solvating electrolytes revealed that reduced Li⁺ solvent coordination promotes stable anion-derived interphases, improving Li deposition and electrochemical stability.
Significance and Impact: This work advances understanding of ion-solvent-anion interactions that control interfacial stability and lithium deposition behavior, which is critical for the advancement of next generation high-energy-density energy storage systems and their safety.
DOI: 10.1002/advs.75550
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