UV-curable-based plastic crystal polymer electrolyte for high-performance all-solid-state Li-ion batteries

An all-solid-state polymer electrolyte has been prepared by polymerizing a monomer ethoxylated trimethylolpropane triacrylate (ETPTA) using ultraviolet irradiation (UV-curing) into crystal electrolyte (referred to as UV-PCCE) in this paper, which has the merit of outstanding interfacial compatibility with electrode materials. Otherwise, on account of the appearance of a unique plastic-crystalline phase, this polymer electrolyte presents a great electrochemical window (4.78 V vs Li/Li + ) and a high ionic conductivity at ambient temperature. The cell of LiFePO 4 /UV-PCCE/Li displays a high initial discharge capacity of 147.1 mAh g −1 at 0.5 C and 118.0 mAh g −1 at a rate of 8.0 C at room temperature. At the same time, it may deliver a high initial discharge capacity of 150.0 mAh g −1 and the coulombic efficiency approximate 100% over 120 cycles at 2.0 C at 55 °C. Its superior performances demonstrate that the UV-PCCE-based electrolyte via an ultraviolet irradiation is applied to the actual, which can be used for high-performance lithium-ion batteries. This technology can also be compatible with existing lithium-ion battery equipment.