An aqueous lithium-iodine battery with solid polymer electrolyte-coated metallic lithium anode

Abstract

An aqueous lithium-iodine (Li-I2) cell with solid polymer electrolyte (SPE)-passivated metallic Li is demonstrated. The metallic Li anode is isolated from the aqueous I3-/I- cathode by the SPE and a Li-ion-conductive solid electrolyte layer. The proposed aqueous Li-I2 cells exhibit a discharge potential of approximately 3.4 V versus Li+/Li, stable capacity retention for 50 cycles, and adequate rate capability.