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AKE: Arbeitskreis Energie
AKE 9: Energy Storage II
AKE 9.3: Talk
Tuesday, March 17, 2015, 14:45–15:00, A 151
Ionic Conductivity of Sodium based Electrolytes — •Kaustubh Bhat, Stefan Blügel, and Hans Lustfeld — Peter Grünberg Institut (PGI-1) and Institute for Advanced Simulation (IAS-1), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Sodium ionic conductors (SICs) are currently receiving renewed attention in the search for electrolytes that possess better ionic conductivity than the materials presently in use. Owing to their lower cost and abundant availability, SICs offer significant advantages over lithium ion batteries for application in large scale energy storage systems. The class of sodium phosphates and thiophosphates (Na3 PO4, Na3 PS4) and the class of NASICON materials are known from experiments to contain electronic insulators with good ionic conductivities [1]. To get an insight into the mechanism of ionic transport we determine in particular the energy barriers of ionic hopping for the following situations: i) several pathways, ii) several pressures [2], and iii) replacement of sodium ions by potassium ions. The aim is to detect from these results materials that have smaller energy barriers, and thus better ionic conductivity.
M. Guin and F. Tietz, J. Power Sources 273, 1056 (2015).
J. A. Hirschfeld and H. Lustfeld, Phys. Rev. B 84, 224308 (2011).