Studies on the Interfacial Impedance of Superconcentrated Non-Aqueous Electrolytes in Contact with Li-Ion Conductive Ceramic Membranes

Abstract

Superconcentrated nonaqueous electrolytes have recently received considerable attention for their various unusual functionalities within rechargeable batteries.1,2 These include high reductive and oxidative stabilities and enhanced thermal stability of the solvent. Our research focuses on the interfacial effects of superconcentrated lithium salts in aprotic solvents, on ceramic Li-ion conductive membranes of varying porosity. Electrochemical impedance spectroscopy was employed with a four-electrode setup to study the interfacial kinetics, and was processed by analyzing the Nyquist plots. These methods revealed promising trends that may lead to the finding an optimal concentration range of LiTFSI in DMC solvent with high porosity ceramic membranes, that would minimize interfacial impedance. This presentation will highlight some of our recent findings. 1. Y. Yamada, M. Yaegashi, T. Abe, and A. Yamada, Chem. Commun., 49, 11194–11196 (2013) http://dx.doi.org/10.1039/C3CC46665E. 2. Y. Yamada and A. Yamada, J. Electrochem. Soc., 162, A2406–A2423 (2015) http://jes.ecsdl.org/content/162/14/A2406.abstract.