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000023008 084__ $$2WoS$$aChemistry, Physical
000023008 1001_ $$0P:(DE-HGF)0$$aKuhn, A.$$b0
000023008 245__ $$aLi Ion Dynamics in Al-Doped Garnet-Type Li7La3Zr2O12 Crystallizing with Cubic Symmetry
000023008 260__ $$aMünchen$$bOldenbourg$$c2012
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000023008 440_0 $$06031$$aZeitschrift für physikalische Chemie$$v226$$x0942-9352$$y5
000023008 500__ $$aWe thank Marc Krey for the ICP-OES analysis. Financial support by the Federal Ministry of Education and Science (BMBF) within the framework of the "Kompetenzverbund Nord" and by the Deutsche Forschungsgemeinschaft (DFG) via the Research Unit 1277 (molife) is gratefully acknowledged. A. K. acknowledges support by the Studienstiftung des deutschen Volkes e.V.
000023008 520__ $$aLithium-ion dynamics in the garnet-type solid electrolyte "Li7La3Zr2O12" (LLZ) crystallizing with cubic symmetry was probed by means of variable-temperature Li-7 NMR spectroscopy and ac impedance measurements. Li jump rates of an Al-containing sample follow Arrhenius behavior being characterized by a relatively high activation energy of 0.54(3) eV and a pre-exponential factor of 2.2(5) x 10(13) s(-1). The results resemble those which were quite recently obtained for an Al-free LLZ sample crystallizing, however, with tetragonal symmetry. Hence, most likely, the significantly higher Li conductivity previously reported for a cubic LLZ sample cannot be ascribed solely to the slight structural distortions accompanying the change of the crystal symmetry. Here, even Al impurities, acting as stabilizer for the cubic polymorph at room temperature, do not lead to the high ion conductivity reported previously.
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000023008 65320 $$2Author$$aSolid Electrolytes
000023008 65320 $$2Author$$aGarnets
000023008 65320 $$2Author$$aLithium Ion Dynamics
000023008 65320 $$2Author$$aNMR
000023008 65320 $$2Author$$aSpin-Lattice Relaxation
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000023008 7001_ $$0P:(DE-HGF)0$$aWilkening, M.$$b1
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000023008 7001_ $$0P:(DE-Juel1)VDB92645$$aChoi, J.-Y.$$b3$$uFZJ
000023008 7001_ $$0P:(DE-Juel1)129667$$aTietz, F.$$b4$$uFZJ
000023008 7001_ $$0P:(DE-HGF)0$$aHeitjans, P.$$b5
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