Abstract
Values of the diffusion coefficient for lithium in thermoexpanded graphite (TEG) are measured during cathodic intercalation from an aprotic electrolyte and during the TEG plate in contact with metallic lithium without electrolyte. In the course of cathodic intercalation, the diffusion coefficient is measured by method of galvanostatic switching-on curves. During TEG contact with lithium, the variation of x-ray diffraction pattern of TEG with time is recorded. It is established that during TEG contact with lithium the lattice spacing decreases and the characteristic size of TEG particles increases with time until the lithiation is complete and intercalate LiC6 forms. Values of the diffusion coefficient determined by either method coincide and amount to 10–10 cm2 s–1.
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Grigor'eva, O.Y., Kulova, T.L., Pushko, S.V. et al. Lithium Intercalation into Graphite during Direct Contact and Anodic Polarization. Russian Journal of Electrochemistry 38, 1327–1333 (2002). https://doi.org/10.1023/A:1021672822768
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DOI: https://doi.org/10.1023/A:1021672822768