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An X-Ray Absorption Spectroscopy Study of Ball-Milled Lithium Tantalate and Lithium Titanate Nanocrystals

DOI: 10.1088/1757-899X/169/1/012015 DOI Help

Authors: A. V. Chadwick (University of Kent at Canterbury) , D. M. Pickup (University of Kent) , S. Ramos (University of Kent) , G. Cibin (Diamond Light Source) , Nuria Tapia-ruiz (University of Oxford) , S. Breuer (Graz University of Technology) , D. Wohlmuth (Graz University of Technology) , M. Wilkening (Graz University of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Iop Conference Series: Materials Science And Engineering , VOL 169

State: Published (Approved)
Published: February 2017
Diamond Proposal Number(s): 14239

Open Access Open Access

Abstract: Previous work has shown that nanocrystalline samples of lithium tantalate and titanate prepared by high-energy milling show unusually high lithium ion conductivity. Here, we report an X-ray absorption spectroscopy (XAS) study at the Ti K-edge and the Ta L3 edge of samples that have been milled for various lengths of time. For both systems the results show that milling creates amorphous material whose quantity increases with the milling time. The more extensive data for the tantalate shows that milling for only 30 minutes generates ~25% amorphous content in the sample. The content rises to ~60% after 16 hours. It is suggested that it is the motion of the lithium ions through the amorphous content that provides the mechanism for the high ionic conductivity.

Journal Keywords: Ball-milling, nanoparticles, lithium tantalate, lithium titanate

Subject Areas: Materials, Chemistry, Energy


Instruments: B18-Core EXAFS