Lithium Diffusion Pathway in Li1.3Al0.3Ti1.7(PO4)3 (LATP) Superionic Conductor

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• 作者：Mykhailo Monchak ; Thomas Hupfer ; Anatoliy Senyshyn ; Hans Boysen ; Dmitry Chernyshov ; Thomas Hansen ; Karl G. Schell ; Ethel C. Bucharsky ; Michael J. Hoffmann ; Helmut Ehrenberg
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：March 21, 2016
• 年：2016
• 卷：55
• 期：6
• 页码：2941-2945
• 全文大小：392K
• ISSN：1520-510X

文摘

The Al-substituted LiTi₂(PO₄)₃ powders Li_1+xAl_xTi_2–x(PO₄)₃ (LATP) were successfully prepared by a water-based sol–gel process with subsequent calcination and sintering. The crystal structure of obtained samples was characterized at different temperatures using high-resolution synchrotron-based X-ray and neutron powder diffraction. Possible lithium diffusion pathways were initially evaluated using the difference bond-valence approach. Experimental 3D lithium diffusion pathway in LATP was extracted from the negative nuclear density maps reconstructed by the maximum entropy method. Evaluation of the energy landscape determining the lithium diffusion process in NASICON-type superionic conductor is shown for the first time.