January 20173-dimensional diffusion pathways in a solid ion conductor -Besides the establishment of novel preparation and processing methods, the development of functioning solid state lithium batteries requires deep understanding of the underlying intercalation- and diffusion mechanisms in the used components. Li10GeP2S12 (LGPS) is one of the most popular solid lithium ion conductors due to its enormously high ionic conductivity of more than 10 mS/cm. The picture shows the different steps from the synthesis of the light gray compound to the visualization of lithium diffusion pathways, which were determined from neutron powder diffraction, utilizing the maximum-entropy-method (MEM). This method allows to illustrate the actual distribution of the nuclear density for lithium, which has a negative scattering length in neutron diffraction. It becomes obvious that the tetragonal elementary cell of LGPS does not only comprise diffusion pathways for lithium ions along the c-axis, but also in the a-b-plane. (Picture submitted by Dominik Weber.)https://www.uni-giessen.de/en/faculties/f08/departments/physchem/janek/gallerypotm/pom2017/BdM0117.jpg/viewhttps://www.uni-giessen.de/@@site-logo/logo.png
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January 2017
3-dimensional diffusion pathways in a solid ion conductor -Besides the establishment of novel preparation and processing methods, the development of functioning solid state lithium batteries requires deep understanding of the underlying intercalation- and diffusion mechanisms in the used components. Li10GeP2S12 (LGPS) is one of the most popular solid lithium ion conductors due to its enormously high ionic conductivity of more than 10 mS/cm. The picture shows the different steps from the synthesis of the light gray compound to the visualization of lithium diffusion pathways, which were determined from neutron powder diffraction, utilizing the maximum-entropy-method (MEM). This method allows to illustrate the actual distribution of the nuclear density for lithium, which has a negative scattering length in neutron diffraction. It becomes obvious that the tetragonal elementary cell of LGPS does not only comprise diffusion pathways for lithium ions along the c-axis, but also in the a-b-plane. (Picture submitted by Dominik Weber.)
