Facile ZnO-based nanomaterial and its fabrication as a supercapacitor electrode: synthesis, characterization and electrochemical studies

Abstract

In recent times, tremendous efforts have been devoted to the efficient and cost-effective advancements of electrochemically active metal oxide nanomaterials.

Synthesis of manganese molybdate/MWCNT nanostructure composite with a simple approach for supercapacitor applications

“…Additionally, the value of x -intercept ( R s ) is attributed to the internal resistance of the powders as the electroactive materials. 56–60…”

Fabrication of Fe3O4-incorporated MnO2nanoflowers as electrodes for enhanced asymmetric supercapacitor performance

“…8,9 In particular, PCs have gained considerable industrial and academic attention because of their higher energy density than EDLCs and sustainable power density. [10][11][12] Transition metal oxides (TMOs), such as cobalt oxide (Co 3 O 4 ), 4,13 zinc oxide (ZnO), 6,14 ruthenium oxide (RuO 2 ), [15][16][17] vanadium oxide (V 2 O 5 ) 18,19 and manganese dioxide (MnO 2 ), [20][21][22] have been widely employed as materials for PCs. Among the extensively studied PC electrode materials, MnO 2 has received considerable attention owing to its merits such as natural abundance, low work function (4.4 eV), reversible charge-discharge characteristics, cost-effectiveness and high specific theoretical capacitance (1370 F g −1 ).…”

Ultra-thin flexible paper of BNNT–CNF/ZnO ternary nanostructure for enhanced solid-state supercapacitor and piezoelectric response

“…6(f), the BNNT-CNF/ZnO ternary nanostructure device showed good energy and power densities of 37.25 W h kg À1 and 0.9 kW kg À1 , respectively, at a current density of 1 A g À1 ; when the current density was increased to 10 A g À1 , the power density was 9 kW kg À1 and the energy density was still retained at 6.25 W h kg À1 , which is higher than those of the other prepared electrodes and previously published reports. 15,16,[44][45][46] The BNNT-CNF/ZnO ternary nanostructure showed an overall higher symmetric supercapacitor performance because of the uniform ZnO NPs attached to the surface of the CNFs and BNNTs, which not only enhanced the intrinsic conductivity and reduced the ion transmission channel, but also enhanced the polarization because of the addition of BNNTs.…”