Ion transport in small-molecule electrolytes based on LiI/3-hydroxypropionitrile with high salt contents

摘要

Abnormal "polymer-in-salt" conduction behavior is observed in a solid electrolyte composed of lithium iodide (LiI) and 3-hydroxypropionitrile (HPN). Based on comprehensive investigations by X-ray diffraction (XRD) and Raman and infrared spectroscopy, this abnormal conduction behavior is attributed to the formation of new ionic associates [Li{sub}m+I{sub}n{sup}-]···N≡C (m>n) and the reinforced hydrogen bonding of I···HO in the electrolyte at high LiI concentrations.