Microwave-assisted high-yield exfoliation of vanadium pentoxide nanoribbons for supercapacitor applications

A multi-chromic supercapacitor of high coloration efficiency integrating a MOF-derived V2O5electrode

“…On deconvolution, the weaker and broader peaks at 516.3 eV and 523.6 eV are related to the presence of V 4+ oxidation states and the relatively stronger peaks (at 517.3 and 524.9 eV) are assigned to the V 5+ states of V 2 O 5 . 35,36,46 The O 1s spectra provided in Fig. 1l and Fig.…”

Electrode Materials for Supercapacitors: A Review of Recent Advances

“…The SSC developed using the hybrid material provides a high E d of 58.8 Wh•kg −1 at and an average P d of 500 W•kg −1 as well as an excellent high-rate capability. The specific capacitance remained nearly constant after up to 1800 charge-discharge cycles [294].…”

Synthesis of V2O5 Nanoribbon–Reduced Graphene Oxide Hybrids as Stable Aqueous Zinc-Ion Battery Cathodes via Divalent Transition Metal Cation-Mediated Coprecipitation

“…Clearly, the exfoliated V 2 O 5 NRs preserve the orthorhombic α-V 2 O 5 crystal structure 40,41 and are aligned in specific crystal orientations. Figure 2e,f 24,42,43 In addition, the Raman spectra of Zn-V 2 O 5 NR/rGO and (Mn + Zn)-V 2 O 5 NR/rGO show a broad peak around 870 cm −1 (marked with the arrows) that can be attributed to the presence of multiple oxidation states of vanadium due to the intercalation or surface binding of Zn 2+ and Mn 2+ cations. 44 The Raman spectra of Zn-V 2 O 5 NR/rGO and (Mn + Zn)-V 2 O 5 NR/rGO also show two major peaks at 1350 and 1598 cm −1 , attributed to the D and G bands of the rGO nanosheets, originating from the vibrational modes of sp 3 carbon at the defect sites and the in-plane vibration of sp 2 -bonded carbon atoms.…”

“…V 2 O 5 NRs were synthesized using microwave-assisted exfoliation reported in our previous work. 24 In brief, commercial orthorhombic α-V 2 O 5 (bulk V 2 O 5 ) powder was soaked in deionized (DI) water for about 4 h to facilitate intercalation of water molecules between the V 2 O 5 layers. The soaked V 2 O 5 powder was then transferred to a low-microwave-absorption solvent tetrahydrofuran (THF) and irradiated with microwave at a constant power of 300 W in a Discover SP microwave reactor (CEM, Matthews, NC).…”

“…The microwave-assisted synthesis is known as a faster and more environmentally friendly technique compared to conventional hydrothermal techniques. 24 In this study, a unique specific heating method provides additional advantages. The microwave absorbing capability of a material is defined by its dielectric properties, i.e., the loss tangent value (tanδ = ε″/ε′), where ε′ and ε″ represent the time-dependent polarizability and permittivity, respectively.…”