Publica
Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten. Insights into the reversibility of aluminum graphite batteries
:
Elia, G.A.; Hasa, I.; Greco, G.; Diemant, T.; Marquardt, K.; Hoeppner, K.; Behm, R.J.; Hoell, A.; Passerini, S.; Hahn, R. | Journal of materials chemistry. A, Materials for energy and sustainability 5 (2017), No.20, pp.9682-9690
ISSN: 2050-7488
ISSN: 2050-7496 |
| European Commission EC
646286; ALION
High Specific Energy Aluminium-Ion Rechargeable Decentralized Electricity Generation Sources |
| Bundesministerium für Bildung und Forschung BMBF
03SF0486 |
|
| English |
| Journal Article |
| Fraunhofer IZM () |
Abstract
Herein 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.