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Abstract
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All solid-state Lithium–ion battery (ASSLB) is a promising energy storage device, owing to its high-energy density and safety. In this work, we report a Li3PS4–xOx by O-doped β–Li3PS4 using planetary ball-milling method. As-prepared Li3PS4–xOx is utilized as a solid electrolyte (SE) for the ASSLB. Experimental observation including electrochemical impedance spectroscopy (EIS), air stability, and electrochemical tests reveal that the small amount of O-doping into β–Li3PS4 can abruptly improve the ionic conductivity, air stability, and electrochemical properties. x = 0.2 amount of O-doping (Li3PS3.8O0.2) exhibits high ionic conductivity of 1.13 mS⋅cm−1, which is 2.56 times higher than that of the un-doped β–Li3PS4 (0.44 mS cm−1). Meanwhile, H2S suppression of Li3PS3.8O0.2 is 10 times higher than that of the β–Li3PS4. Different kinds of anode material (Li, In, and Li–In) for the Li3PS3.8O0.2 glass–ceramic SE with the Li (Ni0.8Co0.1Mn0.1)O2 (NCM811) as cathode is proposed for the fabrication of the ASSLB cell. The NCM811/Li3PS3.8O0.2/Li–In delivered higher reversible capacity and better rate performances than the NCM811/Li3PS4/Li–In ASSLB, owing to O-incorporation. These results reveal that the partial replacement of S2− with O2− could improve the ionic conductivity, air stability, and improve the elec-trochemical performances of β–Li3PS4. |
