Facile Hydrothermal Synthesis of Binder-Free Hexagonal MnO2 Nanoparticles for a High-Performance Supercapacitor’s Electrode Material

Manganese dioxide (MnO2)-based nanostructures are promising electrode materials for supercapacitors (SCs) due to their low cost, eco-friendly nature, and high theoretical capacitance. However, the conductivity of MnO2 is poor, which a big problem when trying achieve desired capacitance value. Herein, hexagonal-phase nanoparticles (NPs) directly grown on 3D conductive carbon cloth (CC) (denoted as MnO2-NPs@CC) binder-free through simple scalable hydrothermal strategy. The results show that MnO2-NPs@CC with large specific surface area porosity could be employed positive material high-performance SCs. Owing these attractive properties, delivers 660 F/g at current density 2 A/g in 6 M KOH aqueous electrolytes. Moreover, demonstrates excellent cycling stability retention 92.8% over 10,000 cycles. Such remarkable findings suggest enhanced electrochemical performance favorable next-generation