Facile and large scale combustion synthesis of α-CoMoO4: Mimics the redox behavior of a battery in aqueous hybrid device

Abstract

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A high energy density asymmetric supercapacitor from ultrathin manganese molybdate nanosheets

“…Compared to these convention metal molybdate-based asymmetric devices like NiMoO 4 //FeMoO 4 asymmetric devices [48],ˇ-NiMoO 4 -CoMoO 4 ·xH 2 O composites//AC asymmeric devices [49] and CoMoO 4 -NiMoO 4 //AC asymmetric devices [50], our device performed much higher energy and power density. Compared to other metal molybdate based-binder free devices, our devices possess superior energy density and power density to CoMoO 4 -3D graphene//AC devices [13], CoMoO 4 //AC asymmetric devices [51], but less than NiMoO 4 //AC devices [17] and NiMoO 4 nanaosheets/carbon fibers//AC devices [18]. Therefore, the MnMoO 4 ·nH 2 O electrode has obvious potential advantages to other molybdate supercapacitors.…”

Tuning the Redox Properties of the Nanostructured CoMoO4 Electrode: Effects of Surfactant Content and Synthesis Temperature

“…CoMoO 4 coated with PANI nanorods had a specific capacitance of 380 F g −1 at a current density of 1 A g −1 . Further to the single‐electrode studies, the performance characteristics reported for the hybrid device (two‐electrode system) constructed from activated carbon (AC) and CoMoO 4 had a specific capacitance of 105 F g −1 with an energy density of 14.5 W h kg −1 when performed at a current density of 5 mA cm −2 . Interestingly, CoMoO 4 modified with chitosan exhibiting a specific capacitance of 81 F g −1 was reported when used as a device at 3 A g −1 but with an improved energy density of 25 W h kg −1 .…”

Role of polymeric surfactant in the synthesis of cobalt molybdate nanospheres for hybrid capacitor applications

“…The tri-block copolymer surfactant F127 belongs to a group of commonly used water-soluble surface active compounds. The objective of having surfactant during the chemical synthesis is to achieve (a) nanostructured morphology through the aid of structure directing agent such as F127, (b [18]. Figure 1 shows the schematic diagram for synthesis of CoMoO 4 in the presence of F127 surfactant.…”

“…Due to these specifications, a lot of efforts have been made to study the possibility of using metal molybdates in energy storage devices [6][7][8][9], [16][17][18][19][20]. Among various molybdate materials, MnMoO 4 /CoMoO 4 heterostructured nanowires showed specific capacitance of 187 F g -1 at current density of 1 A g -1 with an excellent reversibility after 1000 cycles.…”