Enhanced Supercapacitance of Hydrous Ruthenium OxideMesocarbon Microbeads Composites toward Electrochemical Capacitors

Abstract EN

A facile hydrothermal strategy was proposed to synthesize RuO2⋅nH2O/mesocarbon microbeads (MCMBs) composites.

Further physical characterizations revealed that RuO2⋅nH2O nanoparticles (NPs) were well dispersed upon the surfaces of the MCMB pretreated in 6 M KOH solution.

Electrochemical data indicated that the RuO2⋅nH2O/MCMB composites owned higher electrochemical utilization of RuO2 species, better power property, and better electrochemical stability, compared with the single RuO2 phase.

The good dispersion of RuO2⋅nH2O NPs and enhanced electronic conductivity made the H+ ions and electrons easily contact the RuO2⋅nH2O phase for efficient energy storage at high rates.