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1. β-V ₂ O ₅ as Magnesium Intercalation Cathode

   https://doi.org/10.1021/acsaem.2c02371  

   Trócoli, Rafael; Parajuli, Prakash; Frontera, Carlos; Black, Ashley P.; Alexander, Grant C. B.; Roy, Indrani; Arroyo-de Dompablo, M. Elena; Klie, Robert F.; Cabana, Jordi; Palacín, M. Rosa (October 2022, ACS Applied Energy Materials)
2. Twist-engineered phonon polaritons in α − V ₂ O ₅

   https://doi.org/10.1364/OL.557267  

   Shiravi, H.; Zheng, W.; He, Y.; Ran, S.; Rhodes, D_A; Balicas, L.; Zhou, H_D; Ni, G_X (April 2025, Optics Letters)

   The advent of layered materials has unveiled new opportunities for tailoring electromagnetic waves at the subwavelength scale, particularly through the study of polaritons, a hybrid light–matter excitation. In this context, twist-optics, which investigates the optical properties of twisted stacks of van der Waals (vdW) layered specimens, has emerged as a powerful tool. Here, we explore the tunability of phonon polaritons in α-V₂O₅via interlayer twisting using scanning nano-infrared (IR) imaging. We show that the polaritonic response can be finely adjusted by varying their interlayer electromagnetic coupling, allowing for precise control over the propagation direction and phase transition from open unidirectional iso-frequency contours to closed elliptic geometries. Our experimental results, in conjugate with theoretical modeling, reveal the mechanisms underpinning this tunability, highlighting the role of twist-induced nano-light modifications for advanced nanophotonic control at the nanoscale. 

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3. Increased selectivity for allylic oxidation of cyclohexene using TiO 2 modified V 2 O 5 /MoO 3 catalysts

   https://doi.org/10.1016/j.catcom.2017.05.023  

   Yang, Guoqiang; Huff, Matthew D.; Du, Huiyuan; Zhang, Zhibing; Lei, Yu (August 2017, Catalysis Communications)
4. Enhanced charge storage of nanometric ζ-V ₂ O ₅ in Mg electrolytes

   https://doi.org/10.1039/d0nr05060a  

   Johnson, Ian D.; Nolis, Gene; Yin, Liang; Yoo, Hyun Deog; Parajuli, Prakash; Mukherjee, Arijita; Andrews, Justin L.; Lopez, Mario; Klie, Robert F.; Banerjee, Sarbajit; et al (November 2020, Nanoscale)

   null (Ed.)

   V 2 O 5 is of interest as a Mg intercalation electrode material for Mg batteries, both in its thermodynamically stable layered polymorph (α-V 2 O 5 ) and in its metastable tunnel structure (ζ-V 2 O 5 ). However, such oxide cathodes typically display poor Mg insertion/removal kinetics, with large voltage hysteresis. Herein, we report the synthesis and evaluation of nanosized ( ca . 100 nm) ζ-V 2 O 5 in Mg-ion cells, which displays significantly enhanced electrochemical kinetics compared to microsized ζ-V 2 O 5 . This effect results in a significant boost in stable discharge capacity (130 mA h g −1 ) compared to bulk ζ-V 2 O 5 (70 mA h g −1 ), with reduced voltage hysteresis (1.0 V compared to 1.4 V). This study reveals significant advancements in the use of ζ-V 2 O 5 for Mg-based energy storage and yields a better understanding of the kinetic limiting factors for reversible magnesiation reactions into such phases. 

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5. Interface Engineering V ₂ O ₅ Nanofibers for High‐Energy and Durable Supercapacitors

   https://doi.org/10.1002/smll.201901747  

   Bi, Wenchao; Wang, Jichao; Jahrman, Evan P.; Seidler, Gerald T.; Gao, Guohua; Wu, Guangming; Cao, Guozhong (June 2019, Small)

   Abstract A local electric field is induced to engineer the interface of vanadium pentoxide nanofibers (V₂O₅‐NF) to manipulate the charge transport behavior and obtain high‐energy and durable supercapacitors. The interface of V₂O₅‐NF is modified with oxygen vacancies (Vö) in a one‐step polymerization process of polyaniline (PANI). In the charge storage process, the local electric field deriving from the lopsided charge distribution around Vö will provide Coulombic forces to promote the charge transport in the resultant Vö‐V₂O₅/PANI nanocable electrode. Furthermore, an ≈7 nm porous PANI coating serves as the external percolated charge transport pathway. As the charge transfer kinetics are synergistically enhanced by the dual modifications, Vö‐V₂O₅/PANI‐based supercapacitors exhibit an excellent specific capacitance (523 F g⁻¹) as well as a long cycling lifespan (110% of capacitance remained after 20 000 cycles). This work paves an effective way to promote the charge transfer kinetics of electrode materials for next‐generation energy storage systems. 

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