Li-Ion Transfer Kinetics at Interface Between Intercalation Electrode and Organic Electrolyte

Li+-ion conducting inorganic solid electrolytes have gained significant attention as alternatives to conventional organic liquid electrolytes owing to the high thermal stability and single-ion conducting property. However, they still suffer from the difficulty of interface construction between electrode and electrolyte, leading to the increase in the interfacial resistance. Integration of soft organic electrolytes (e.g., gel polymer electrolytes) into electrode/solid electrolyte interface is considered to be one of the promising strategies to form a low-resistive interface. Such configurations require the fast Li+ ion transfer across the electrode/organic electrolyte interface toward high-rate performance of batteries. In this chapter, the effects of salt concentration and anion species in organic electrolytes on the Li+ ion transfer kinetics at electrode/electrolyte interface are reviewed. Furthermore, we describe how physicochemical properties of organic electrolytes affect the interfacial Li+ ion transfer kinetics based on the classical Butler–Volmer model and solvent dynamics theory.