Elia, Giuseppe AntonioHasa, IvanaGreco, GiorgiaDiemant, ThomasMarquardt, KrystanHoeppner, KatrinBehm, R. JürgenHoell, ArminPasserini, StefanoHahn, Robert2018-04-192018-04-1920172050-7488https://depositonce.tu-berlin.de/handle/11303/7648http://dx.doi.org/10.14279/depositonce-6838Herein we report a novel study on the reaction mechanism of non-aqueous aluminum/graphite cell chemistry employing 1-ethyl-3-methylimidazolium chloride:aluminum trichloride (EMIMCl:AlCl3) as the electrolyte. This work highlights new insights into the reversibility of the anion intercalation chemistry besides confirming its outstanding cycle life exceeding 2000 cycles, corresponding to more than 5 months of cycling test. The reaction mechanism, involving the intercalation of AlCl4− in graphite, has been fully characterized by means of ex situ X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure spectroscopy (XANES) and small-angle X-ray scattering (SAXS), evidencing the accumulation of anionic species into the cathode as the main factor responsible for the slight initial irreversibility of the electrochemical process.en540 Chemie und zugeordnete WissenschaftenArticle2050-7496