Photovoltaically self-charging cells with WO<sub>3</sub>·H<sub>2</sub>O/CNTs/PVDF composite

Huang, Xuezhen; Zhang, Xi; Jiang, Hongrui

doi:10.1039/c6ra21303k

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…These interactions may lead to a little modification in the PVDF chain alignment, crystallinity. It may result in the formation of an interfacial electric field which strengthens polarization through synergistic action contributes to better piezoelectric properties 39–41 . The interaction of the surface charges on the WO 3 nanorods with the charges of the CH 2 –CF 2 is the prominent reason for the conversion of nonpolar into the polar phase in the PVDF polymeric nanocomposite nanofibers.…”

Section: Resultsmentioning

confidence: 99%

Flexible electrospun PVDF/WO₃ nanocomposite fibers for piezoelectric energy harvesting applications

Arul,

Suresh,

Satthiyaraju

et al. 2023

Polymer Composites

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The emerging field of energy harvesting depends on the electrically conductive materials that are highly flexible and deformable. The morphological, structural, thermal, mechanical, and piezoelectric output studies of electrospun polyvinylidene fluoride (PVDF) and PVDF/WO3 nanorods composite nanofibers were investigated for the piezoelectric energy harvesting applications. There is a significant enhancement in the piezoelectric β phase after the addition of the WO3 nanorods into the PVDF. The elemental composition of the PVDF/WO3 nanorods composite nanofibers is confirmed by the W, O, F, and C elements. The thermal stability of the WO3 nanorods added composite nanofibers was increased up to 30°C in reference to TGA responses. Based on the mechanical test, the maximum tensile strength and modulus of elasticity were enhanced around by 220 and 246% for the WO3‐integrated PVDF nanofibers. Furthermore, the piezoelectric coefficient of 18.98 pC/N is achieved for the composite PVDF nanofibers which are mainly due to the improvement of the electroactive β phase. The piezoelectric energy harvesting responses were found an output voltage of 2.1 V based on the microstrain set‐up. Thus, these WO3 nanorods incorporated PVDF nanofibers keep the great potential for the piezoelectric energy harvesting, wearable electronics and biomedical applications.

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Section: Resultsmentioning

confidence: 99%

Flexible electrospun PVDF/WO₃ nanocomposite fibers for piezoelectric energy harvesting applications

Arul,

Suresh,

Satthiyaraju

et al. 2023

Polymer Composites

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“…used a composite containing WO x at its counter electrode to convert a DSSC to a two‐terminal hybrid cell (Figure 16c). A voltage as high as 0.62 V was achieved but the voltage dropped sharply due to the small capacitance at the anode electrode [76] . As shown in Figure 16d, Cai et al.…”

Section: Review Of Hybrid Cellsmentioning

confidence: 93%

A Critical Review on the Voltage Requirement in Hybrid Cells with Solar Energy Harvesting and Energy Storage Capability

Takshi

Aljafari

Kareri

et al. 2020

Batteries & Supercaps

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Energy storage is essential in many electrical and electronic applications powered through solar cells. This has motivated many research groups around the world to design single hybrid cells with the capability of both energy harvesting and charge storage. Despite the general perception of being able to make more compact and lower‐cost solar panels with hybrid cells, as compared to conventional energy systems with separated panels and batteries, there are drawbacks in the series connection of hybrid cells in a panel form. These drawbacks are discussed in this review. The focus of the current manuscript is on the application of single hybrid cells in low‐voltage and low‐power electronics and wearable electronics. The voltage requirements in those applications are discussed and two‐terminal and three‐terminal hybrid cells are reviewed. Promising technologies are highlighted in the conclusions.

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Integrating a photovoltaic storage system in one device: A critical review

Vega‐Garita

Ramírez-Elizondo

Narayan

et al. 2018

Progress in Photovoltaics

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Due to the variable nature of the photovoltaic generation, energy storage is imperative, and the combination of both in one device is appealing for more efficient and easy-to-use devices.Among the myriads of proposed approaches, there are multiple challenges to overcome to make these solutions realistic alternatives to current systems. This paper classifies and identifies previous efforts to achieve integrated photovoltaic storage devices. Moreover, the gaps and future perspectives are analysed to give an overview of the field, paying attention to low-power devices (<10 W) as well as high-power devices (>10 W). We focus on devices that combine solar cells with supercapacitors or batteries, providing information about the structure, materials used, and performance. On the one hand, small power devices must concentrate on including power electronics to increase the efficiency of the system as well as ensuring a safe operation; likewise, more attention should be drawn to validate the feasibility of novel concepts by carrying out more realistic and standardised tests, including long-term testing. On the other hand, high-power devices must be researched thoroughly to evaluate the impact of high temperatures on energy storage and solar module ageing; furthermore, optimum system sizing is a relevant topic that deserves attention and its relation to modular solutions. This critical literature review serves as a guide to understand the characteristics of the approaches followed to integrate photovoltaic devices and storage in one device, shedding light on the improvements required to develop more robust products for a sustainable future. KEYWORDS battery, one device, PV-storage integration, solar-battery integration, solar energy, supercapacitor 1 INTRODUCTION Solar photovoltaic (PV) energy generation is highly dependent on weather conditions, making solar power intermittent and many times unreliable. Moreover, energy demand is widespread during the day, and solar energy is available for few hours, provoking a mismatch between demand and supply. These two issues are the driving force behind the use of energy storage (ES) devices, which help decrease the fluctuations from the generation side but also provide the possibility of performing ancillary services. Consequently, it is fundamental to find the most appropriate energy storage device for particular applications and operational conditions.According to the characteristics of ES devices, the criterion that defines when the energy is stored and utilised may vary, even for the same component. Some ES devices can supply power during extended periods (hours, days), while others are more suitable for shorter periods of operation (seconds, minutes). For instance, rapid changes in PV power due to rapidly changing illumination conditions can be smoothed using supercapacitors (SCs); they deliver power when solar supply is scarce, so the load is still satisfied. For devices with lower self-discharging values like electrochemical cells (batteries), the electrical energy produced by...

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Photovoltaically self-charging cells with WO₃·H₂O/CNTs/PVDF composite

Cited by 7 publications

References 28 publications

Flexible electrospun PVDF/WO₃ nanocomposite fibers for piezoelectric energy harvesting applications

Flexible electrospun PVDF/WO₃ nanocomposite fibers for piezoelectric energy harvesting applications

A Critical Review on the Voltage Requirement in Hybrid Cells with Solar Energy Harvesting and Energy Storage Capability

Integrating a photovoltaic storage system in one device: A critical review

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Photovoltaically self-charging cells with WO3·H2O/CNTs/PVDF composite

Cited by 7 publications

References 28 publications

Flexible electrospun PVDF/WO3 nanocomposite fibers for piezoelectric energy harvesting applications

Flexible electrospun PVDF/WO3 nanocomposite fibers for piezoelectric energy harvesting applications

A Critical Review on the Voltage Requirement in Hybrid Cells with Solar Energy Harvesting and Energy Storage Capability

Integrating a photovoltaic storage system in one device: A critical review

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Photovoltaically self-charging cells with WO₃·H₂O/CNTs/PVDF composite

Flexible electrospun PVDF/WO₃ nanocomposite fibers for piezoelectric energy harvesting applications

Flexible electrospun PVDF/WO₃ nanocomposite fibers for piezoelectric energy harvesting applications