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In situ ATR‐FTIR spectroscopy reveals the inflection point of interfacial Li⁺‐solvent/anion concentration caused by the anti‐synergy effect. a) A snapshot of the LiCoO2‐electrolyte interface in the simulation system. b). The potential of mean force (PMF) of interfacial solvated‐Li⁺ as a function of distance from the electrode under different voltages. c) In situ ATR‐FTIR spectra of the LCO/electrolyte interface collected during initial charging. The current density is 25 mA g⁻¹. The spectrum collected at inflection voltage is colored in red. d) Schematic illustration of the electrolyte solvation configuration at the LCO/electrolyte interface during the Li⁺‐solvation (charging) process at different voltages.
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Electrolyte engineering is crucial for improving cathode electrolyte interphase (CEI) to enhance the performance of lithium‐ion batteries, especially at high charging cut‐off voltages. However, typical electrolyte modification strategies always focus on the solvation structure in the bulk region, but consistently neglect the dynamic evolution of el...
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