JOURNAL OF POWER SOURCES | 卷:501 |
Electrochemical performance of the mixed solid electrolyte (100-x) Li3SI-xLi6PS5Cl (x=0, 10, 20, and 30) for all-solid-state lithium batteries | |
Article | |
Park, Min-ho1  Rajagopal, Rajesh1  Ryu, Kwang-Sun1  | |
[1] Univ Ulsan, Dept Chem, Ulsan 44610, South Korea | |
关键词: All-solid-state lithium battery; Solid electrolyte; Sulfide electrolyte; Li3SI; Li6PS5Cl; | |
DOI : 10.1016/j.jpowsour.2021.230031 | |
来源: Elsevier | |
【 摘 要 】
In this study, solid electrolytes with improved performance are synthesized by mixing Li3SI with an antiperovskite structure that is stable to lithium metal and Li6PS5Cl with high ionic conductivity. (100-x)Li(3)SIxLi(6)PS(5)Cl (x = 0, 10, 20, 30), which is a mixture of two sulfide-based solid electrolytes, is prepared by ball milling. The structural characteristics, surface morphology, and particle size of the electrolyte material are analyzed using physico-chemical characterization technologies, such as high-power X-ray diffraction and field emission scanning electron microscopy. Electrochemical impedance spectroscopy is used to calculate the ionic conductivity of the mixed solid electrolyte. The ionic conductivity of 80Li(3)SI-20Li(6)PS(5)Cl, which exhibits the best all-solid-state lithium battery performance, is 5.84 x 10(-4) S cm(-1). In addition, 80Li(3)SI-20Li(6)PS(5)Cl shows excellent stability against lithium metal. The 2032-type coin cell composed of fabricated Li-In/80Li(3)SI-20Li(6)PS(5)Cl/NCM811 composites shows a superior capacity of 165 mAh g(-1) in the initial cycle. This study provides high ionic conductivity and excellent electrochemical performance through the mixing of two kinds of solid electrolyte materials to obtain a promising solid electrolyte.
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