Li-Ion Conduction and Stability of Perovskite Li3/8Sr7/16Hf1/4Ta3/4O3

A solid Li-ion conductor with a high room temperature Li-ion conductivity and small interfacial resistance is required for its application in next-generation Li-ion batteries. Here, we prepared a cubic perovskite-related oxide with the general formula Li3/8Sr7/16Hf1/4Ta3/4O3 (LSHT) by a conventional...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2016-06, Vol.8 (23), p.14552-14557
Main Authors: Huang, Bing, Xu, Biyi, Li, Yutao, Zhou, Weidong, You, Ya, Zhong, Shengwen, Wang, Chang-An, Goodenough, John B
Format: Article
Language:English
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Summary:A solid Li-ion conductor with a high room temperature Li-ion conductivity and small interfacial resistance is required for its application in next-generation Li-ion batteries. Here, we prepared a cubic perovskite-related oxide with the general formula Li3/8Sr7/16Hf1/4Ta3/4O3 (LSHT) by a conventional solid-state reaction method, which was studied by X-ray diffraction, electrochemical impedance spectroscopy, and 7Li MAS NMR. Li3/8Sr7/16Hf1/4Ta3/4O3 has a high Li-ion conductivity of 3.8 × 10–4 S cm–1 at 25 °C and a low activation energy of 0.36 eV in the temperature range 298–430 K. It exhibits both high stability and small interfacial resistance with commercial organic liquid electrolytes, which makes it promising as a separator in Li-ion batteries.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.6b03070