Mishra, Ajay KumarBulla, MamtaKumar, Vinay2026-03-252026-03-252025Padmanabhanunni, A. and Pretorius, T.B., 2025. An exploratory study of the mental health of first responders: depression, anxiety, and post-traumatic stress disorder. South African Journal of Psychology, p.00812463251317901.https://doi.org/10.1007/s10904-025-03647-1https://hdl.handle.net/10566/22122The advancement of flexible supercapacitors has been constrained by the inherent difficulty of fabricating flexible electrodes. In this work, the V2O5 nanostructures were synthesized at different temperatures (120–200 °C) via hydrothermal treatment, followed by calcination, resulting in materials with high porosity and optimized electrochemical properties. The fabricated electrode (synthesized V2O5 at 180 °C) shows a maximum capacitance (178.5 F g⁻1 at 1 A g⁻1 current density) compared to other prepared samples 1 in a 1.0 M Na2SO4 aqueous electrolyte. For practical applications, V2O5 nanostructures were integrated with f-CNTs to fabricate the V2O5//f-CNT asymmetric supercapacitor device, achieving a specific capacitance of 104.4 F g⁻1 at 1 A g⁻1 within a 1.6 V voltage window, signifying improved charge storage capabilities. The device achieved an energy density of 37.12 Wh kg⁻1 and a power density of 800 W kg⁻1 at 1 A g⁻1. The synergistic integration of Faradaic reactions from V₂O₅ with the EDL capacitance of f-CNTs enabled the device to retain 91.2% of its capacitance after 2000 GCD cycles, with enhanced performance sustained up to 5000 cycles. Furthermore, the device demonstrated remarkable flexibility, losing only 4.3% of its capacitance when bent at a 90° angle, underscoring its potential as a high-performance energy storage solution. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.enAsymmetric DeviceEnergy Storagef-CNTFlexibleV2O5Article