Surface structural disordering in graphite upon lithium intercalation/deintercalation

By V. Sethuraman, Laurence Hardwick, Venkat Srinivasan, R. Kostecki. 2010

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We report on the origin of the surface structural disordering in graphite anodes induced by lithium intercalation and deintercalation processes. Average Raman spectra of graphitic anodes reveal that cycling at potentials that correspond to low lithium concentrations in Lix C( 0≤ x 0.33) are present. Electrochemical impedance spectra show larger interfacial impedance for the electrodes that were fully delithiated during cycling as compared to electrodes that were cycled at lower potentials (U < 0.15 V vs. Li/Li + ). Steep Li

Subfields: Automotive Engineering, Electrical and Electronic Engineering, Materials Chemistry

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