Sulfide-based solid electrolytes are pursued for their application in bulk-type all-solid-state lithium batteries. Although the usefulness of Li10GeP2S12-type materials have been demonstrated in all-solid-state cathodes, a suitable material with both high ionic conductivity and good interfacial properties with common anode materials is still lacking. In this work, we explore the phase and transport properties of mechanically-milled Li7P2S8Br0.5I0.5, with emphasis on the favorable kinetics at Li metal anode. The low temperature crystalline phase Li7P2S8Br0.5I0.5 (LT-LPSBI) has exceptionally high ionic conductivity of 4.7 mS/cm at room temperature. Moreover, the LT-LPSBI supports long-term Li cycling at 0.5 mA cm-2 with low and stable interfacial resistance (5 O cm2). Transport phenomenon of Li/LT-LPSBI interface and cycling behavior of Li symmetric cells are studied and discussed in detail.
Revised: December 18, 2020 |
Published: May 1, 2019
Citation
Wang Y., J. Xiao, D. Lu, Y. He, G.J. Harvey, C. Wang, and J. Zhang, et al. 2019.Superionic Conduction and Interfacial Properties of the Low Temperature Phase Li7P2S8Br0.5I0.5.Energy Storage Materials 19.PNNL-SA-134611.doi:10.1016/j.ensm.2019.02.029