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Evolution of the SEI layer with increasing number of cycles: (a) time series of ADF-STEM images showing the evolution of the SEI at the glassy-carbon electrode; (b–d) first, second, third, and fourth CVs, respectively, obtained from an operando ec liquid cell STEM experiment showing charge–discharge from GC electrode in LiPF6/EC/EMC liquid electrolyte at a flow rate of 2.5 μL/min.
