On the correlation among surface chemistry, 3D structure, morphology, electrochemical and impedance behavior of various lithiated carbon electrodes

摘要

This work relates to a rigorous study of the correlation among surface chemistry (FTIR, XPS), 3D structure (X-ray and neutron scattering), morphology (SEM, AFM), and electrochemical and impedance behavior of lithiated carbon electrodes in commonly used liquid electrolyte solutions. Four different types of carbons were explored in a single study. These included, for comparison, two types of disordered carbons, single-wall carbon nanotubes (SWNT), and synthetic graphite powder as a reference system. All four types of carbons develop a similar surface chemistry in alkyl carbonate solutions which is dominated by solvent reduction.