Li9GaP4, reveals a high superionic conductivity of 1.6 mS cm–1 and a low activation energy. Li9GaP4 is easily accessible via ball milling of the elements and subsequent annealing at quite moderate temperatures. Temperature-dependent single-crystal X-ray diffraction reveals that lithium is not located at the center of the octahedral voids of the slightly distorted cubic close packing of P atoms but occurs with split positions. Impedance spectroscopy and temperature-dependent static 7Li NMR experiments reveal activation energies of 36 and 25 kJ mol–1, respectively.
Fast Lithium-Ion Conduction in Phosphide Li9GaP4
Tassilo M. F. Restle, Christian Sedlmeier, Holger Kirchhain, Wilhelm Klein, Gabriele Raudaschl-Sieber, Leo van Wüllen, and Thomas F. Fässler*
Chem. Mater. 2021, 33, 8, 2957–2966
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