Thin films as model system for understanding the electrochemical reaction mechanisms in conversion reaction of MgH$_2$ with lithium
| العنوان: | Thin films as model system for understanding the electrochemical reaction mechanisms in conversion reaction of MgH$_2$ with lithium |
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| المؤلفون: | Fermin Cuevas, A. Lacoste, Junxian Zhang, Efi Hadjixenophontos, Guido Schmitz, Michel Latroche, Pierre Dubot, Nicola Berti |
| المساهمون: | Institut de Chimie et des Matériaux Paris-Est (ICMPE), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| المصدر: | J.Power Sources J.Power Sources, 2018, 402, pp.99-106. ⟨10.1016/j.jpowsour.2018.09.033⟩ Journal of Power Sources Journal of Power Sources, Elsevier, 2018, 402, pp.99-106. ⟨10.1016/j.jpowsour.2018.09.033⟩ |
| بيانات النشر: | HAL CCSD, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | [PHYS]Physics [physics], Materials science, Renewable Energy, Sustainability and the Environment, Magnesium hydride, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, Substrate (electronics), 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 7. Clean energy, 0104 chemical sciences, Dielectric spectroscopy, Anode, chemistry.chemical_compound, chemistry, X-ray photoelectron spectroscopy, Chemical engineering, Sputtering, Lithium, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Thin film, 0210 nano-technology |
| الوصف: | International audience; Metal hydrides are promising high-capacity anode materials for Li-ion batteries but their conversion reaction with lithium suffers from low reversibility at room temperature (RT). Irreversibility issues in magnesium hydride MgH2 thin films are investigated, as well-defined model system. Films are deposited over Cu current collectors by means of microwave plasma-assisted sputtering and coated with aluminum to minimize formation of passivating MgO native oxide. Structural and chemical properties of the electrodes have been analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and electrochemical impedance spectroscopy (EIS). Galvanostatic cycling reversibility at RT and C/50 regime is limited to 25% in the first cycle for 1 μm thick films. The lithiation of the thin film is complete and doubles its thickness. Despite drastic volume changes, neither cracks, voids, nor detachment of the thin film from the substrate are noticed. Moreover, electronic resistivity decreases upon lithiation due to the formation of metallic Mg. The origin of irreversibility phenomena in MgH2 films is attributed to sluggish mass transport of species within the electrode at RT. |
| اللغة: | English |
| تدمد: | 0378-7753 1873-2755 |
| DOI: | 10.1016/j.jpowsour.2018.09.033⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a68c42e949a8cbbc9d405adb27e9d847 https://hal.archives-ouvertes.fr/hal-01880985 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....a68c42e949a8cbbc9d405adb27e9d847 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 03787753 18732755 |
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| DOI: | 10.1016/j.jpowsour.2018.09.033⟩ |