Preparation of Li 7 P 3 S 11 glass-ceramic electrolyte by dissolution-evaporation method for all-solid-state lithium ion batteries

By Ruifeng Xu, Xiaohu Xia, Z. Yao, X. Wang, C. Gu, J. Tu. Electrochimica Acta, 2016

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Abstract 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 Li 7 P 3 S 11 glass-ceramic electrolyte is successfully synthesized by dissolution- evaporation approach. The solvent effect on the electrochemical performance of Li 7 P 3 S 11 is investigated by electrochemical impedance spectroscopy and chronoamperometry tests. The Li 7 P 3 S 11 electrolyte prepared by a solution of acetonitrile has a high ionic conductivity of 9.7 × 10 −4  S cm −1 at 298 K and a low activation energy of 31.2 kJ mol −1 . Impressively, a wide and stable electrochemical window up to 5 V (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.

Subfields: Automotive Engineering, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/1d907414786e091d677aaf527a4c2015a7b45fcd