Cycle life Characterization of Lithium-ion Batteries with Artificial Solid-electrolyte Interphase Coating on Both Electrodes

In recent years, the use of lithium ion batteries (LIBs) has shown tremendous increases in areas of mobile device applications and electric vehicles. The capacity fade with charge-discharge cycles is a serious issue, especially for automotive application, and is generally associated with structural and chemical changes in electrodes. Coating of artificial solid-electrolyte interphase (SEI) on electrode suppresses the dissolution of electrode active materials and inhibits the formation and growth of thick resistive layer at electrode-electrolyte interface during electrochemical cycling. In earlier publications, lithium phosphorus oxynitride (LiPON) and Al2O3 were studied as the artificial SEI materials, and reduced capacity fades were obtained for both materials [1-2]. However, most studies on artificial SEI are focused on cathode surfaces