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Issue 45, 2018
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Influence of the electrode nano/microstructure on the electrochemical properties of graphite in aluminum batteries

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Abstract

Herein we report on a detailed investigation of the irreversible capacity in the first cycle of pyrolytic graphite electrodes in aluminum batteries employing 1-ethyl-3-methylimidazolium chloride:aluminum trichloride (EMIMCl:AlCl3) as electrolyte. The reaction mechanism, involving the intercalation of AlCl4 in graphite, has been fully characterized by correlating the micro/nanostructural modification to the electrochemical performance. To achieve this aim a combination of X-ray diffraction (XRD), small angle X-ray scattering (SAXS) and computed tomography (CT) has been used. The reported results evidence that the irreversibility is caused by a very large decrease in the porosity, which consequently leads to microstructural changes resulting in the trapping of ions in the graphite. A powerful characterization methodology is established, which can also be applied more generally to carbon-based energy-related materials.

Graphical abstract: Influence of the electrode nano/microstructure on the electrochemical properties of graphite in aluminum batteries

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Publication details

The article was received on 27 Aug 2018, accepted on 12 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8TA08319C
Citation: J. Mater. Chem. A, 2018,6, 22673-22680
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    Influence of the electrode nano/microstructure on the electrochemical properties of graphite in aluminum batteries

    G. Greco, D. Tatchev, A. Hoell, M. Krumrey, S. Raoux, R. Hahn and G. A. Elia, J. Mater. Chem. A, 2018, 6, 22673
    DOI: 10.1039/C8TA08319C

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