Stacked vanadium pentoxide–zinc oxide interface for optically-chargeable supercapacitors

Abstract

Light-rechargeable supercapacitors effectively convert photon energy into electrochemical energy and store them for further utilization. In this work, we developed a metal oxide-based optically responsive symmetrical supercapacitor using a novel...

Mechanochemically-assisted synthesis of 3D, 2D and quasi 2D lead halide perovskites for supercapacitor applications

“…B0.05 to B0.035 mW h cm À2 for MSP) occurs with increment in P A (from B0.077 to B0.274 mW cm À2 for SCP and from B0.074 to 0.196 mW cm À2 for MSP), which is in agreement with previous reports. 34,35 At a particular P A value of B0.17 mW cm À2 , the E A value is higher (B0.038 mW h cm À2 ) for MAPbBr 3 MSP than the corresponding value of B0.011 mW h cm À2 for MAPbBr 3 SCP, which signifies better electrochemical performance for MAPbBr 3 MSP. 36 The air stability of the MAPbBr 3 MSP based electrode was investigated over time by monitoring changes in the XRD patterns of the thick film on a glass slide.…”

Highly Efficient Photo Rechargeable Supercapacitor based on Ambipolar Interface of Graphitic Carbon Nitride and MXene

“…[51] CPE L " is used to describe pseudocapacitance, which arises due to voltage-dependent Faradaic charge transfer processes. [50] The capacitance enhancement in pC 3 N 4 /MXene device due to light exposure is compared with previously reported supercapacitors utilized with photo-assisted enhancement e. g., bR/ PANI supercapacitor (550 nm, 37.2 %), [52] Co(OH) 2 supercapacitor (470 nm, 240 %), [53] carbon dot supercapacitor (visible light, 54.4 %), [54] Ti 3 C 2 T X -carbon dots supercapacitors (400 to 800 nm, 35.9 %), [55] nanoporous Cu@Cu 2 O supercapacitor (700 to 300 nm, 37.9 %), [56] V 2 O 5 /ZnO [57] (365 nm, 178 %) (Figure 4e). We report the considerably high enhancement of capacitance (~1960 %) under illumination among the state-of-the art reported energy storage devices for photo charged enhanced capacitance.…”

A mass-producible polyoxovanadate cathode for ultrafast-kinetics zinc-ion batteries

“…15–17 By contrast, vanadium-based materials generally present high capacities, and outstanding cyclability, owing to the multiple valence states of V and robust layered/tunneled structures that can withstand the insertion/removal of divalent charge carriers. 18–25 Ever since Nazar et al synthesized a Zn 2+ -ion intercalated V 2 O 5 positive material Zn 0.25 V 2 O 5 · n H 2 O by a microwave hydrothermal method, which featured the nanobelt morphology and enlarged interlayer spacing, and exhibited high capacity (300 mA h g −1 at 50 mA g −1 ) and exceptional long-term cycling stability, 26 various layered metal-preinsertion vanadium oxides such as Zn 3 V 2 O 7 (OH) 2 · n H 2 O, 27 Mn 0.15 V 2 O 5 · n H 2 O, 28 Na 2 V 6 O 16 ·3H 2 O, 29 Ba 1.2 V 6 O 16 ·3H 2 O, 30 KV 3 O 8 ·0.75H 2 O, 31 and MnV 2 O 6 , 32 displaying encouraging specific capacities and good cycling sustainability, have been reported. However, these layered vanadium oxides are still confronted with unsatisfactory rate performance owing to the confined two-dimensional (2D) Zn 2+ -ion mobilities in narrow interlayer gaps.…”