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Abstract
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In this work, we synthesized a Li6-xPS5-xCl1.0Br0.5 solid electrolytes by solution technique process to facilitate mass production. First, the precursor was dissolved in acetonitrile for 8 h, and then solvent was removed by vacuum evaporator. The product was then obtained after sintering at 480 °C for 15 h. X-ray diffraction (XRD) measurement and Raman spectral analysis were conducted to determine the structural characteristic of the solid electrolytes. The ionic conductivity of the resulting Li5.5PS4.5Cl1.0Br0.5 was highest at 7.0 mS cm−1 at 25 °C. The critical current density was also higher than that of Li6PS5Cl. When Li5.5PS4.5Cl1.0Br0.5 was used in ASSLBs (All-solid-state lithium batteries) with LiNi0.8Mn0.1Co0.1O2 as cathode material and Li-In alloy as an anode material, the initial discharge capacity was 183.6 mAh g-1 at a rate of 0.1 C and the capacity retention was 78% after 50 cycles. |
