Significant enhancement of dielectric permittivity and percolation behaviour of La2−xSrxNiO4/poly(vinylidene fluoride) composites with different Sr doping concentrations

Meeporn, Keerati; Chanlek, Narong; Thongbai, Prasit

doi:10.1039/c9ra09719h

Cited by 9 publications

(6 citation statements)

References 42 publications

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“…The enhanced dielectric properties presumably resulted from interfacial polarization at the semiconductor-insulator interface, with consideration of the micro-capacitor model and percolation threshold theory, when incorporating the semiconducting-phase P3HT polymer into the PVDF-HFP polymer. 25,39,40 In summary, the dramatic increase in the electrical output of the P3HT/PVDF-HFP TENG over the PVDF-HFP TENG arose from enhancements in the surface charge and potential and from improvements in the dielectric constant after adding the P3HT polymer. Fig.…”

Section: Resultsmentioning

confidence: 98%

Electrospun P3HT/PVDF-HFP Semiconductive Nanofibers for Triboelectric Nanogenerators

Lin

Chang

Lee

et al. 2022

Preprint

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This paper describes a simple electrospinning approach for fabricating poly(3-hexylthiophene) (P3HT)/poly(vinylidene fluoride–co–hexafluoropropylene) (PVDF-HFP) semiconductive nanofiber mat triboelectric nanogenerators (TENGs). Measurements of the electrical properties of the P3HT/PVDF-HFP semiconductive nanofiber TENGs revealed that the output voltage could be enhanced up to 78 V with an output current of 7 μA. The output power of the device reached 0.55 mW, sufficient to power 500 red light-emitting diodes instantaneously, as well as a digital watch. The P3HT/PVDF-HFP semiconductive nanofiber TENG could be used not only as a self-powered device but also as a sensor for monitoring human action. Furthermore, it displayed good durability when subjected to 20,000 cycles of an external force test.

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Section: Resultsmentioning

confidence: 98%

Electrospun P3HT/PVDF-HFP Semiconductive Nanofibers for Triboelectric Nanogenerators

Lin

Chang

Lee

et al. 2022

Preprint

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“…Explicitly, the Ni‐3p core levels exhibit a new component at BE = 67.6 eV, associated with the formation of a NiO bond. [ 26 ] Correspondingly, Te‐4d core levels in the O 2 ‐exposed NiTe 2 display three emerging components related to TeO 2 (10% of total spectral area), TeO (16% of the total spectral area), and TeO x (13% of total spectral area) at BEs of 43.6, 43.1, and 42.6 eV, respectively. [ 25b,27 ]…”

Section: Surface Chemical Reactivity and Ambient Stabilitymentioning

confidence: 99%

Sustainable Hydrogen Production Using Group‐10 Metal Chalcogenides as Low‐Cost Effective Electrocatalysts

D’Olimpio

Santoro

Kuo

et al. 2022

Advanced Sustainable Systems

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Clean hydrogen production is crucial to the prospects of the energy transition. Electrochemical water splitting is one of the most promising tools for the sustainable and efficient production of hydrogen. One of the main open challenges is the replacement of precious Pt for electrodes with new materials combining cheapness, robustness to CO poisoning, and fast reaction kinetics. Group‐10 metal chalcogenides represent suitable candidates to address all main open challenges in the quest for alternative materials to pure Pt as electrocatalysts, with the further advantage of the ease of their synthesis as both bulk crystals and nanostructures. All compounds of this class of materials show surface stability, chemical inertness toward CO adsorption, and electrode durability in acidic and alkaline environments. Here, the physicochemical mechanisms ruling hydrogen production with group‐10 metal chalcogenides are focused on by combining surface‐science experiments and theory. Especially, the Tafel slope in Pt3Te4 nanocrystals and NiTe2 nanotubes is as low as 32 and 59 mV dec−1, respectively, making them competitive with state‐of‐the‐art reference materials Pt and Pt/C already in the first implementation. Moreover, the presence of massless Dirac‐cone electrons in many group‐10 metal chalcogenides, with an intrinsically large electron mobility, is naturally beneficial for fast electron transfer, and correspondingly, for fast reaction kinetics. These results pave the way for the advent of this new class of materials in electrocatalysis, and for sustainable hydrogen production through water splitting.

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“…Alternatively, a combination of the PT and EMT models, i.e., the effective medium percolation theory model (EMPT), may be more suitable than either model alone. 27,42 The EMPT model is usually used to predict the 3 0 value of ceramic-metal/polymer composites (e.g., BaTiO 3 -Cu/PVDF composites). 43 The effective dielectric permittivity (3 eff ) of the composites can be expressed as eqn (1),…”

Section: View Article Onlinementioning

confidence: 99%

Suppressing loss tangent with significantly enhanced dielectric permittivity of poly(vinylidene fluoride) by filling with Au–Na_1/2Y_1/2Cu₃Ti₄O₁₂ hybrid particles

2020

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Significant enhancement of dielectric permittivity and percolation behaviour of La_2−xSr_xNiO₄/poly(vinylidene fluoride) composites with different Sr doping concentrations

Abstract: The percolation behaviour and dielectric properties of La2−xSrxNiO4 (LSNO)/poly(vinylidene fluoride) (PVDF) composites with different Sr doping concentrations were investigated.

Cited by 9 publications

References 42 publications

Electrospun P3HT/PVDF-HFP Semiconductive Nanofibers for Triboelectric Nanogenerators

Electrospun P3HT/PVDF-HFP Semiconductive Nanofibers for Triboelectric Nanogenerators

Sustainable Hydrogen Production Using Group‐10 Metal Chalcogenides as Low‐Cost Effective Electrocatalysts

Suppressing loss tangent with significantly enhanced dielectric permittivity of poly(vinylidene fluoride) by filling with Au–Na_1/2Y_1/2Cu₃Ti₄O₁₂ hybrid particles

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Significant enhancement of dielectric permittivity and percolation behaviour of La2−xSrxNiO4/poly(vinylidene fluoride) composites with different Sr doping concentrations

Abstract: The percolation behaviour and dielectric properties of La2−xSrxNiO4 (LSNO)/poly(vinylidene fluoride) (PVDF) composites with different Sr doping concentrations were investigated.

Cited by 9 publications

References 42 publications

Electrospun P3HT/PVDF-HFP Semiconductive Nanofibers for Triboelectric Nanogenerators

Electrospun P3HT/PVDF-HFP Semiconductive Nanofibers for Triboelectric Nanogenerators

Sustainable Hydrogen Production Using Group‐10 Metal Chalcogenides as Low‐Cost Effective Electrocatalysts

Suppressing loss tangent with significantly enhanced dielectric permittivity of poly(vinylidene fluoride) by filling with Au–Na1/2Y1/2Cu3Ti4O12 hybrid particles

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Significant enhancement of dielectric permittivity and percolation behaviour of La_2−xSr_xNiO₄/poly(vinylidene fluoride) composites with different Sr doping concentrations

Suppressing loss tangent with significantly enhanced dielectric permittivity of poly(vinylidene fluoride) by filling with Au–Na_1/2Y_1/2Cu₃Ti₄O₁₂ hybrid particles