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|a (NLM)27019548
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a Wagner, Reinhard
|e verfasserin
|4 aut
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|a Crystal Structure of Garnet-Related Li-Ion Conductor Li7-3x Ga x La3Zr2O12
|b Fast Li-Ion Conduction Caused by a Different Cubic Modification?
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|c 2016
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|a Text
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|a ohne Hilfsmittel zu benutzen
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|a Date Revised 20.11.2019
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Li-oxide garnets such as Li7La3Zr2O12 (LLZO) are among the most promising candidates for solid-state electrolytes to be used in next-generation Li-ion batteries. The garnet-structured cubic modification of LLZO, showing space group Ia-3d, has to be stabilized with supervalent cations. LLZO stabilized with Ga3+ shows superior properties compared to LLZO stabilized with similar cations; however, the reason for this behavior is still unknown. In this study, a comprehensive structural characterization of Ga-stabilized LLZO is performed by means of single-crystal X-ray diffraction. Coarse-grained samples with crystal sizes of several hundred micrometers are obtained by solid-state reaction. Single-crystal X-ray diffraction results show that Li7-3x Ga x La3Zr2O12 with x > 0.07 crystallizes in the acentric cubic space group I-43d. This is the first definite record of this cubic modification for LLZO materials and might explain the superior electrochemical performance of Ga-stabilized LLZO compared to its Al-stabilized counterpart. The phase transition seems to be caused by the site preference of Ga3+. 7Li NMR spectroscopy indicates an additional Li-ion diffusion process for LLZO with space group I-43d compared to space group Ia-3d. Despite all efforts undertaken to reveal structure-property relationships for this class of materials, this study highlights the potential for new discoveries
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|a Journal Article
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|a Redhammer, Günther J
|e verfasserin
|4 aut
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|a Rettenwander, Daniel
|e verfasserin
|4 aut
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|a Senyshyn, Anatoliy
|e verfasserin
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|a Schmidt, Walter
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|a Wilkening, Martin
|e verfasserin
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|a Amthauer, Georg
|e verfasserin
|4 aut
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|i Enthalten in
|t Chemistry of materials : a publication of the American Chemical Society
|d 1998
|g 28(2016), 6 vom: 22. März, Seite 1861-1871
|w (DE-627)NLM098194763
|x 0897-4756
|7 nnns
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| 773 |
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|g volume:28
|g year:2016
|g number:6
|g day:22
|g month:03
|g pages:1861-1871
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