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

Inorganics

Franziska Thoss¹  Lars Giebeler¹  Karsten Wei෾r¹  Jörg Feller²  Jürgen Eckert¹ 

[1] Leibniz Institute for Solid State and Materials Research Dresden (IFW), Institute for Complex Materials, Helmholtzstr. 20, D-01069 Dresden, Germany; E-Mails:;Hochschule für Technik und Wirtschaft Dresden, Faculty of Mechanical Engineering/Process Engineering, Friedrich-List-Platz 1, D-01069 Dresden, Germany; E-Mail:

关键词: Li-ion batteries;    metallic anodes;    amorphous;    ball milling;    iron oxide;   

DOI  :  10.3390/inorganics2040674

来源: mdpi

【 摘 要 】

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/kg_Al, respectively, after the third cycle.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.