Highly uniform deposition of MoO3 nanodots on multiwalled carbon nanotubes for improved performance of supercapacitors

In situ hydrogenation of molybdenum oxide nanowires for enhanced supercapacitors

“…The H x MoO 3 nanowire electrodes achieve specic capacitance of 120 F g À1 at a scan rate of 100 mV s À1 , which is a 20-fold enhancement compared to the pristine MoO 3 nanowires (6 F g À1 ) and also higher than the values recently reported for MoO 3 nanowires and their composites. 6,8 This enhancement in the electrochemical performance of H x MoO 3 nanowires is mainly due to the increase in their electronic conductivity and density of the hydroxyl groups on the surface of the MoO 3 nanowires, and thereby enhances the pseudocapacitance. It is imperative to note that the decrease in the specic capacitance of H x MoO 3 nanowires at the higher scan rate of 100 mV s À1 is only 19%, indicating that hydrogenated nanowires have excellent capacitive characteristics and are a promising material for supercapacitor applications.…”

“…1 Furthermore, it offers a broad range of oxidation states which offer a broad range of redox reactions and van der Waals gaps between octahedron Mo-O sheets, used for the intercalation of foreign atoms which results in an enhanced pseudo capacitance. [5][6][7] Despite the theoretical expectation that electrodes made from MoO 3 exhibit low specic capacitance, poor cycling stability and rate capability due to their inherent poor electronic and ionic conductivity their performance in practical applications is limited. 8 Many researchers have tried to improve the electronic conductivity of MoO 3 based electrodes by exploring hybrid composite structures of MoO 3 with polymers, MWCNTs or with graphite and its derivatives.…”

“…5,6,[9][10][11] Although MoO 3 nanocomposites with MWCNTs exhibit a pronounced increase in specic capacitances, the incorporation of MWCNTs does not change the intrinsic properties of MoO 3 . 6,9 Furthermore, the introduction of MWCNTs increases the fabrication cost and hence restricts the composite's potential development. Therefore, it is highly desirable to fundamentally improve the electrical conductivity, pseudocapacitance, and rate capability with a high specic capacitance while maintaining a low fabrication cost of MoO 3 .…”

Preparation and Characterization of Poly(N-Methylpyrrole)/MoO3 Hybrid Composites

“…[23] In practice, the utilization of alone MoO 3 particles is hindered by its poor electric conductivity, which limits the specific capacitance, cyclic stability and faradaic redox reaction kinetics. Nanocomposites with graphene [24] or 4 carbon nanotubes [25] have been found to overcome such shortcoming, enhancing the conductivity and improving the electrochemical performance of MoO 3 -based electrodes.…”

Super long-life supercapacitor electrode materials based on hierarchical porous hollow carbon microcapsules

“…To enhance the capacitance performance, considerable efforts have been devoted to fabricating hierarchical porous carbons with macro-/micro-or mesopores [12,13] . It has been proposed that macropores can act as bulk buffering reservoirs for electrolyte ions to minimize the diffusion distances to the interior surfaces of the pores, while meso-or micropores can provide a large accessible surface area for ion transport/charge storage, and can continuously increase charge accommodation [14,15] . Thus, hierarchical porous structures with macro-/micro-or mesopores are strongly desired for high-performance supercapacitors.…”