Abstract
The precursor of plate-like Li3PS4 solid electrolyte (75Li2S▪25P2S5, SE (LS)), about 3 μm in length, 500 nm in width, and 100–200 nm in thickness, was successfully prepared from Li2S and P2S5 using ethyl propionate (EP) as a synthetic medium via liquid-phase shaking. Upon evacuating at 170 °C, the precursor decomposed to SE (LS), which exhibited ionic conductivity of about 2.0 × 10−4 Scm−1 at room temperature. SEM observation revealed that the SE (LS) thus obtained had plate-like morphology with dimension of 3 μm in length, 500 nm in width, and 100–200 nm in thickness. Owing to the nanosized SE (LS), an all-solid-state half-cell using composite anode consisting of 90 wt% LiNi1/3Mn1/3Co1/3O2 (NMC) and 10 wt% SE (LS) delivered a high capacity up to 130 mAhg−1(NMC) at the first discharge.
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Acknowledgements
This study was supported by the Advanced Low Carbon Technology Specially Promoted Research for Innovative Next Generation Batteries (JST-ALCA-SPRING) program of the Japan Science and Technology Agency. The authors thank Prof. Tatsumisago (Osaka Prefecture University), Prof. Hayashi (Osaka Prefecture University), and Dr. Sakuda (National Institute of Advanced Industrial Science and Technology, AIST) for their assistance and useful discussions. The authors also gratefully acknowledge Dr. Tsukasaki and Prof. Mori of Osaka Prefecture University, Dr. Kobayashi and Dr. Takahashi of Osaka Municipal Technical Research Institute for their assistance in TEM and SEM observations.
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Phuc, N.H.H., Morikawa, K., Mitsuhiro, T. et al. Synthesis of plate-like Li3PS4 solid electrolyte via liquid-phase shaking for all-solid-state lithium batteries. Ionics 23, 2061–2067 (2017). https://doi.org/10.1007/s11581-017-2035-8
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DOI: https://doi.org/10.1007/s11581-017-2035-8