Temperature Dependence of Electrical Transport in a Pressure-Sensitive Nanocomposite

Webb, Alexander J.; Bloor, D.; Szablewski, Marek; Atkinson, D.

doi:10.1021/am502515u

Cited by 12 publications

(12 citation statements)

References 26 publications

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“…Nonetheless, a reversible low and high current switching behavior can be realized by controlling the applied electric field for these polymer/metallic nanoparticle composites. , Therefore, they are potentially useful as electrical switches. In addition, the FN electron tunneling effect can be utilized for elastomer/spiky metallic particle composites, or the so-called quantum tunneling composites (QTCs). , By mechanically deforming the QTCs with an external force, the bulk resistivity can substantially change, which is termed as the piezoresistive property.…”

Section: Polymer/conductive Particle Nanodielectricsmentioning

confidence: 99%

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Challenges and Opportunities of Polymer Nanodielectrics for Capacitive Energy Storage

Zhang

Allahyarov

et al. 2021

ACS Appl. Mater. Interfaces

129

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With the modern development of power electrification, polymer nanocomposite dielectrics (or nanodielectrics) have attracted significant research attention. The idea is to combine the high dielectric constant of inorganic nanofillers and the high breakdown strength/low loss of a polymer matrix for higher energy density polymer film capacitors. Although impressively high energy density has been achieved at the laboratory scale, there is still a large gap from the eventual goal of polymer nanodielectric capacitors. In this review, we focus on essential material issues for two types of polymer nanodielectrics, polymer/conductive nanoparticle and polymer/ceramic nanoparticle composites. Various material design parameters, including dielectric constant, dielectric loss, breakdown strength, high temperature rating, and discharged energy density will be discussed from both fundamental science and high-voltage capacitor application points of view. The objective is to identify advantages and disadvantages of the polymer nanodielectric approach against other approaches utilizing neat dielectric polymers and ceramics. Given the state-of-the-art understanding, future research directions are outlined for the continued development of polymer nanodielectrics for electric energy storage applications.

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Section: Polymer/conductive Particle Nanodielectricsmentioning

confidence: 99%

“…In addition, the FN electron tunneling effect can be utilized for elastomer/spiky metallic particle composites, or the so-called quantum tunneling composites (QTCs). 70,71 By mechanically deforming the QTCs with an external force, the bulk resistivity can substantially change, which is termed as the piezoresistive property.…”

Section: T H Imentioning

confidence: 99%

Challenges and Opportunities of Polymer Nanodielectrics for Capacitive Energy Storage

Zhang

Allahyarov

et al. 2021

ACS Appl. Mater. Interfaces

129

View full text Add to dashboard Cite

show abstract

“…As a result, both the real and imaginary parts of the complex permittivity of the LDPE/CB20 were found to increase significantly. Thus, the volume fraction of the CB particles ( CB  ) within the composite, as well as the microstructure, was affected by thermal expansion, which plays a remarkable role on the electrical properties of the composite [43][44][45] . The changes in the location of the interfacial relaxation peak with increasing temperature can be explained in a similar fashion by the disruption of the previously conductive aggregates (for 40, 50 and 60 °C).…”

Section: Effect Of Temperature On the Electrical Responsesmentioning

confidence: 99%

Electrical and thermal phenomena in low‐density polyethylene/carbon black composites near the percolation threshold

Azizi

David

Fréchette

et al. 2018

J of Applied Polymer Sci

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Low-density polyethylene (LDPE)/carbon black (CB) composites were fabricated via meltcompounding technique. The percolation threshold was found to be around 20 wt% CB, and an electrical network formed by conductive CB was proven by SEM investigation. Dielectric responses depicted an interfacial relaxation peak at 20 wt% CB content. LDPE/CB composites showed an electric field-dependent conductivity as well as a hysteresis behavior around the percolation threshold region. The CB particles with high thermal conductivity increased the heat conductance of the LDPE/CB20 up to 56%. The dynamic mechanical analysis (DMA) of the LDPE/CB composites exhibited a noticeable contribution of CB throughout the composites, increasing the storage and loss modulus. The physical interactions between CB particles in the

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“…carbons including carbon nanotubes, carbon fiber, graphite, pyrolytic carbons and carbon blacks or metals including metal powders, metal fiber or metal oxides), with the property of the electrical resistivity of which decreases under compression as the separation of the fillers decreases, while the electrical resistivity increases when the composites are stretched [7][8][9][10][11][12][13][14][15] . By choosing the proper type and amount of matrix and fillers, desirable pressure-sensitivity for various applications can be achieved from finger sensing [16] to vehicle sensing [17] .…”

Section: Introductionmentioning

confidence: 99%

Pressure-sensitive behaviors, mechanisms and model of field assisted quantum tunneling composites

Ding

Han

Dong

et al. 2017

Polymer

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Field assisted quantum tunneling composite (FAQTC) is a unique pressure-sensitive material with the advantages of large resistance change range under external force, easy preparation and excellent mechanical properties. In this paper, with attentions to the pressure-sensitivity of the FAQTCs, the effects of silicon rubber matrix, diameter and dosage of nickel particles as well as magnetic field treatment are systematically investigated. The reproducibility of the pressure-sensitivity of the FAQTCs under cyclic load is explored. Based on Cotton's equation and Burger's model, the descriptions of stress relaxation behavior and electrical resistance relaxation behavior of the composites under static compressive loading are given respectively. The results show that external magnetic field during curing process allows better adjustment of the pressure-sensitivity of the FAQTCs with fewer nickel particles. The increase of the dosage of nickel particles can improve the stability and reproducibility of the pressure-sensitivity of the composites. Electrical resistance relaxation behavior of the composites is partly controlled by the

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Temperature Dependence of Electrical Transport in a Pressure-Sensitive Nanocomposite

Cited by 12 publications

References 26 publications

Challenges and Opportunities of Polymer Nanodielectrics for Capacitive Energy Storage

Challenges and Opportunities of Polymer Nanodielectrics for Capacitive Energy Storage

Electrical and thermal phenomena in low‐density polyethylene/carbon black composites near the percolation threshold

Pressure-sensitive behaviors, mechanisms and model of field assisted quantum tunneling composites

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