Journal article

Authors list: Hofmann, P; Ariai, J; Zaichenko, A; Janek, J; Mollenhauer, D; Zeier, WG

Publication year: 2018

Pages: 170-179

Journal: Solid State Ionics

Volume number: 319

ISSN: 0167-2738

DOI Link: https://doi.org/10.1016/j.ssi.2018.01.049

Publisher: Elsevier

Abstract: 

Recent work has shown an increased interest in lithium titanium oxide phosphates as possible anode materials for lithium ion batteries. However, the intrinsic transport properties of these materials have not been studied yet. In this work, we employ X-ray diffraction and electrical impedance spectroscopy to characterize lithium titanium oxide phosphate LiTiOPO₄. In order to better understand the transport of lithium ions, substitution with metal cations of different charges and different radii are used to elucidate changes in the crystal structure and their effects on the lithium ion conductivity. We show that substitution of the transition metal has a small influence on the ionic conductivity only, but comes with a noticeable impact on the activation energy. In addition to the experimental work, density functional theory calculations are employed to provide possible diffusion pathways and mechanism, and explain the decrease in the activation barriers for ionic motion.

Harvard Citation style: Hofmann, P., Ariai, J., Zaichenko, A., Janek, J., Mollenhauer, D. and Zeier, W. (2018) Structural analysis and electrical characterization of cation-substituted lithium ion conductors Li1−xTi1−xMxOPO4 (M = Nb, Ta, Sb), Solid State Ionics, 319, pp. 170-179. https://doi.org/10.1016/j.ssi.2018.01.049

APA Citation style: Hofmann, P., Ariai, J., Zaichenko, A., Janek, J., Mollenhauer, D., & Zeier, W. (2018). Structural analysis and electrical characterization of cation-substituted lithium ion conductors Li1−xTi1−xMxOPO4 (M = Nb, Ta, Sb). Solid State Ionics. 319, 170-179. https://doi.org/10.1016/j.ssi.2018.01.049