Merging of Kirkendall Growth and Ostwald Ripening: CuO@MnO2 Core-shell Architectures for Asymmetric Supercapacitors

摘要: Fabricating hierarchical core-shell nanostructures is currently the subject of intensive research in electrochemical field owing to hopes it raises for making efficient electrodes high-performance supercapacitors. Here, we develop a simple and cost-effective approach prepare CuO@MnO2 without any surfactants report their applications as An asymmetric supercapacitor with nanostructure positive electrode activated microwave exfoliated graphite oxide (MEGO) negative yields an energy density 22.1 Wh kg−1 maximum power 85.6 kW kg−1; device shows long-term cycling stability which retains 101.5% its initial capacitance even after 10000 cycles. Such facile strategy fabricate significantly improved functionalities opens up novel avenue design materials on demand applications.