Conductivity and thermopower of blends of polyaniline with insulating polymers (PETG and PMMA)

Subramaniam, C. K.; Kaiser, A. B.; Gilberd, P.W.; Liu, Chia‐Jyi; Weßling, B.

doi:10.1016/0038-1098(95)00653-2

Cited by 64 publications

(35 citation statements)

References 14 publications

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“…Room temperature electrical conductivities for ropes are on the order of 10 6 Sm -1 , in a region classified as "glassy metals" below that of highly conducting crystalline materials like copper (10 8 Sm -1 ), and above that of short range order materials like polyaniline and other conducting polymers (10 5 Sm -1 ) (38,(45)(46)(47)(48). Much work has been done in an attempt to increase the conductivity of CNT buckypapers through chemical modification of the CNTs (49)(50)(51)(52)(53), and physical manipulation of the CNT network (50,(54)(55)(56)(57)(58)(59)(60), however, 10 6 Sm -1 remains the benchmark electrical conductivity.…”

Section: Carbon Nanotube Conductivitymentioning

confidence: 99%

Carbon Nanotube-Based Polymer Composite Thermoelectric Generators

Hewitt

Carroll

2014

ACS Symposium Series

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Carbon nanotube-based polymer composites possess several properties that make them ideal for use in low powered waste heat recovery applications not suitable to nonorganic crystalline materials even though their thermoelectric performance is lower, such as their light weight and flexible physical structure. Additionally, the favorable thermoelectric properties of the carbon nanotubes with moderate Seebeck coefficients and potentially large electrical conductivities result in modest power factors, while the low thermal conductivity of the polymer host aids in maintaining a temperature gradient across the composite. In order to effectively utilize a thermoelectric material in a practical application, they must be combined in a thin film device structure consisting of alternating p-type and n-type elements that are connected electrically in series and thermally in parallel. The device performance is then dictated by the intrinsic thermoelectric properties of the individual layers in the device. Ultimately, the total power output is limited by several extrinsic properties of the specific application.

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Section: Carbon Nanotube Conductivitymentioning

confidence: 99%

Carbon Nanotube-Based Polymer Composite Thermoelectric Generators

Hewitt

Carroll

2014

ACS Symposium Series

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“…2(b)) at its peak. Such a giant Seebeck effect has never been reported in any other materials including conducting polymers 31 and Pani-CSA films. 32 The maximum Seebeck coefficient S max systematically decreases with increase in x, whilst the samples become more metallic, i.e., S max is 0.58 V/K at 40 K, 0.17 V/K at 25 K, 0.09 V/K at 10 K, and 0.07 V/K at 14 K for 0.1 M, 0.5 M, 1.0 M, and 2.0 M CSA, respectively.…”

mentioning

confidence: 94%

High thermoelectric figure of merit in nanocrystalline polyaniline at low temperatures

Nath

Kumar

Kuo

et al. 2014

Applied Physics Letters

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Thermoelectric coolers with figure of merit (ZT) close to unity at low temperatures are the need of the hour with new advances in high temperature superconductors, superconducting microelectronic circuits, quantum computers, and photonics. Here, we demonstrate that the conducting polymer polyaniline (Pani) doped with camphor sulfonic acid synthesized in semi-crystalline nanostructures, possesses a giant Seebeck effect at low temperatures. The resulting enormously large Seebeck coefficient (up to 0.6 V/K) combined with an intrinsically low electrical conductivity and thermal conductivity give rise to a ZT = 0.77 at 45 K and ZT = 2.17 at 17 K.

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“…Based on the detailed studies of electronic transport in polyacetylene, PANI blends with various dopants, Kaiser et al [8][9][10] suggested a heterogeneous model combining hopping-tunnelling with quasione-dimensional (quasi-1D) metallic conduction, which can explain the change from negative TCR to positive TCR with temperature increase.…”

Section: Introductionmentioning

confidence: 99%