Lithium Diffusion Pathway in Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) Superionic Conductor
2016; American Chemical Society; Volume: 55; Issue: 6 Linguagem: Inglês
10.1021/acs.inorgchem.5b02821
ISSN1520-510X
AutoresMykhailo Monchak, Thomas Hupfer, Anatoliy Senyshyn, H. Boysen, D. Chernyshov, Thomas C. Hansen, Karl G. Schell, Ethel C. Bucharsky, Michael J. Hoffmann, Helmut Ehrenberg,
Tópico(s)Advanced Battery Technologies Research
ResumoThe Al-substituted LiTi2(PO4)3 powders Li1+xAlxTi2–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.
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