Interfacial construction of Li2O2 for a performance-improved polymer Li–O2 battery†
Compared with conventional nonaqueous Li–O2 batteries using organic liquid electrolytes, polymer Li–O2 batteries have been considered as ideal alternatives based on the consideration of safety issues. However, high interfacial resistances and severe overpotential build-up during cycling remain unsolved problems for their future application. Much less attention has been devoted to the interfacial chemistries in polymer Li–O2 batteries. In this study, interfacial engineering was elaborately carried out for the design and construction of a Li–O2 battery with the aim of decreasing the overpotential and achieving a highly efficient polymer Li–O2 battery. A dramatically decreased overpotential (terminal voltage of charge lower than 4 V vs. Li/Li+) was obtained in a polymer Li–O2 battery assembled with a stable redox mediator decorated polymer electrolyte and a high catalytic RuO2@reduced graphene oxide based cathode for the first time. The feasibility study demonstrated that interfacial construction could be used as a promising alternative strategy for the development of a polymer Li–air battery.
- This article is part of the themed collection: 2016 Journal of Materials Chemistry A HOT Papers