Lingqiao Wu

Haijun Yu

Xianwei Guo

Peipei Ding

The invention discloses A preparation method of polyrotaxane polymer electrolyte and its application, and belongs to the technical field of lithium ion batteries. The polyrotaxane polymer is composed of a linear polymer, a cyclic molecule and an end-capping molecule. The polyrotaxane polymer electrolyte is composed of a polyrotaxane polymer, a conductive lithium salt and a porous support material. The polymer electrolyte is simple in preparation process, free of byproducts and excellent in electrochemical performance. The room-temperature ionic conductivity can be greater than 10Scm, and the electrochemical window can be greater than 5V (vs.Li/Li); and the lithium metal battery assembled by the composite material has excellent cycle performance at room temperature. The interfacial compatibility of the polymer electrolyte and the electrode can be obviously improved, so that the electrochemical performance and the safety performance of the battery are improved.

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Beijing, China

Lingqiao Wu