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Preparation and Cycling Performance of Iron or Iron Oxide Containing Amorphous Al-Li Alloys as Electrodes

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Leibniz Institute for Solid State and Materials Research Dresden (IFW), Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany
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Institute of Materials Science, Technische Universität Dresden, Helmholtzstr. 7, D-01069 Dresden, Germany
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Hochschule für Technik und Wirtschaft Dresden, Faculty of Mechanical Engineering/Process Engineering, Friedrich-List-Platz 1, D-01069 Dresden, Germany
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Author to whom correspondence should be addressed.
Inorganics 2014, 2(4), 674-682; https://doi.org/10.3390/inorganics2040674
Received: 23 September 2014 / Revised: 3 November 2014 / Accepted: 4 December 2014 / Published: 12 December 2014
Crystalline phase transitions cause volume changes, which entails a fast destroying of the electrode. Non-crystalline states may avoid this circumstance. Herein we present structural and electrochemical investigations of pre-lithiated, amorphous Al39Li43Fe13Si5-powders, to be used as electrode material for Li-ion batteries. Powders of master alloys with the compositions Al39Li43Fe13Si5 and Al39Li43Fe13Si5 + 5 mass-% FeO were prepared via ball milling and achieved amorphous/nanocrystalline states after 56 and 21.6 h, respectively. In contrast to their Li-free amorphous pendant Al78Fe13Si9, both powders showed specific capacities of about 400 and 700 Ah/kgAl, respectively, after the third cycle. View Full-Text
Keywords: Li-ion batteries; metallic anodes; amorphous; ball milling; iron oxide Li-ion batteries; metallic anodes; amorphous; ball milling; iron oxide
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Thoss, F.; Giebeler, L.; Weißer, K.; Feller, J.; Eckert, J. Preparation and Cycling Performance of Iron or Iron Oxide Containing Amorphous Al-Li Alloys as Electrodes. Inorganics 2014, 2, 674-682.

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