Preparation of Li7P3S11 glass-ceramic electrolyte by dissolution-evaporation method for all-solid-state lithium ion batteries

• Published in: Electrochimica acta Vol. 219; pp. 235 - 240
• Main Authors: Xu, R.C., Xia, X.H., Yao, Z.J., Wang, X.L., Gu, C.D., Tu, J.P.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 20-11-2016
• Subjects: Ion conductivity; Li7P3S11 glass-ceramic; Lithium ion battery; Solid state electrolyte; Li7P3S11 glass-ceramic; Lithium ion battery; Solid state electrolyte; Ion conductivity
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2016.09.155

Design/fabrication of solid state electrolytes with high ionic conductivity is of great importance to develop next-generation Li ion batteries. In this work, the Li7P3S11 glass-ceramic electrolyte is successfully synthesized by dissolution- evaporation approach. The solvent effect on the electrochemical performance of Li7P3S11 is investigated by electrochemical impedance spectroscopy and chronoamperometry tests. The Li7P3S11 electrolyte prepared by a solution of acetonitrile has a high ionic conductivity of 9.7×10−4Scm−1 at 298K and a low activation energy of 31.2kJmol−1. Impressively, a wide and stable electrochemical window up to 5V (vs. Li/Li+) is demonstrated between the solid electrolyte and lithium electrode. The developed dissolution-evaporation approach shows good industrial prospect due to its advantages of energy conservation and high efficiency.