Two dimensional layered bismuthene nanosheets with ultra-fast charge transfer kinetics as a superior electrode material for high performance asymmetric supercapacitor

Compositing redox-rich Co–Co@Ni–Fe PBA nanocubes into cauliflower-like conducting polypyrrole as an electrode material in supercapacitors

“…Additionally, Trasatti's analysis was used to quantify the contribution of capacitive and diffusive currents to the total capacitance value. 54,[57][58][59][60][61] According to this approach, the total charge (q T ) is the sum of the diffusion-controlled inner (q i ) and non-diffusion-controlled outer surface charge (q o ); by dividing the charge with the CV potential window, total capacitance (C T ), diffusion-controlled inner capacitance (C i ), and non-diffusion controlled outersurface capacitance (C o ) can be determined. 54,62,63 The C T equals the reciprocal y-intercept of the C s À1 vs. n 1/2 plot (Fig.…”

Recent advances in ecofriendly 2D monoelemental bismuthene as an emerging material for energy, catalysis and biomedical applications

“…Particularly, due to their unique characteristics, such as their tunable band-gap (0.18 to 2.6 eV), enhanced carrier motilities, high surface area, adaptable interlayer gap, superior mechanical stability, and exceptional adjustability of the atomically thin monolayer sheets, bismuthene has caught the attention of researchers. 103 Researchers have demonstrated that 2D bismuthene can serve as a potential substitute electrode for prospective energy storage systems, particularly supercapacitors and the same has been reviewed in this section. The gravimetric capacity of the bismuthene nanosheets at 10 mV s À1 was determined by cyclic voltammetry analysis, and the findings were assessed.…”

“…Due to their high power density (104 W kg −1 ), quick charge-discharge speed, great cyclic stability (10 6 cycles), and low equivalent series resistance, supercapacitors (SC) are regarded as potential energy storage technology. 103 However, their unsatisfactory energy densities limit their practical applications, and thus to address the rising need for energy, research has been devoted to investigating sustainable, affordable, and efficient energy storage solutions. 104 Owning to the exceptional electrochemical activity of ultrathin, layered 2D metallenes, they have become a hot research topic to improve energy storage applications.…”

“…Additionally, employing bismuthene/activated carbon (AC), the asymmetric supercapacitor achieved the maximum specific capacity of 87.3 mA h g −1 at 1 A g −1 , with an energy density of 27.23 W h kg −1 and power density of 312.5 W kg −1 . 103 The fabrication of bismuthene-graphene with a hierarchical 3D microstructure as both the negative and positive electrode was studied by Wei et al , which showed a specific capacitance of 400.83 F g −1 at 0.67 A g −1 . The energy density of 45.55 W h kg −1 at 400 W kg −1 , together with the cycling stability of 89.24% after 3600 cycles was reported.…”

Exfoliation of Bismuth Dichalcogenide Crystals into Bi2O3 Nanosheets for the Photocatalysis of Hexavalent Chromium and Azo Compounds

“…The intercalation of organic molecules into the interlayer space of bismuth dichalcogenide crystals, followed by their heat removal, causes the crystals to exfoliate into nanosheets during exfoliation. 16 The resultant Bi 2 O 3 nanosheets have a vast surface area, which gives the photocatalytic process many active sites. Hexavalent chromium and azo compounds have been degraded photocatalytically in the past utilizing a variety of materials, including TiO 2 , 17 ZnO, 18 and CdS.…”