Recent Advances in Organic Thermoelectric Materials: Principle Mechanisms and Emerging Carbon-Based Green Energy Materials

Zhang, Yinhang; Heo, Young-Jung; Park, Soo‐Jin

doi:10.3390/polym11010167

Cited by 97 publications

(80 citation statements)

References 166 publications

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“…Organic materials including polyaniline (PANi), poly‐(3,4‐ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT:PSS), polypyrrole (PPy), and polyacetylene (PA) with a low thermal conductivity that are lightweight and flexible are widely studied as TMs . These organic TMs demonstrated advantages for assembling flexible TEG devices, but their low Seebeck coefficient and low electrical conductivity resulted in poor ZT values as well as lower power factors than those of inorganic TMs, which limits their applications.…”

Section: Materials For Energy Conversion Devicesmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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body is actually a tremendous storehouse of energy that is generated from body heat and motion. [15][16][17][18][19] Power generation from breathing, heating, blood transport, arm motion, typing, and walking could reach to over 100 W for a 68 kg adult's daily activities (Figure 1). [20] Thus, converting 1% of power from the human body may be enough to support the work of most portable electronics.In the past two decades, researchers have developed several energy conversion devices based on piezoelectricity, electrostaticity, triboelectricity, or thermoelectricity that can directly harvest the mechanical or thermal energy and convert it into electric energy (these conversion devices are so-called nanogenerators (NGs)). [21][22][23][24][25] The first nanogenerator (NG) based on ZnO was invented by Prof. Wang in 2006; after that, various NGs were developed to harvest the mechanical or thermal energy with the output performance increasing gradually. [26] These NGs are easy-to-construct flexible devices since most materials for these devices are polymers and nanomaterials. Generally, the flexible devices assembled by film materials can be stretchable and bendable in one direction. But their lack of air-permeability, poor 3D deformation, and low damage tolerance limit their application, especially for wearable electronics. Therefore, fiberbased energy conversion devices have been designed. [27] These fiber-based devices can also be knitted to yarn or fabric in the clothing system to build up a large area electronic system. [28,29] The energy generation and internal charging can be realized by means of a self-powered system that harvests the energy from natural sources around the human body to sustain the wearable electronics. [30][31][32] The search for functional materials that possess good conversion efficiency, as well as great mechanical and environmental stability, combined with a novel device design might push these devices to meet the requirement of a practical application. In the past decade, numerous contributions have been offered to improve the performance of fiber-based energy conversion devices (FBECD) and extend its application. This review specifically summarizes FBECD with different energy conversion mechanisms including piezoelectricity, electrostaticity, triboelectricity, and thermoelectricity in recent processes (Figure 2). The functional materials, fiber fabrication techniques, and device design strategies for different classes of FBECDs are covered in the article. We also introduce an overview of the fiber-based self-powered system and sensors and Following the rapid development of lightweight and flexible smart electronic products, providing energy for these electronics has become a hot research topic. The human body produces considerable mechanical and thermal energy during daily activities, which could be used to power most wearable electronics. In this context, fiber-based energy conversion devices (FBECD) are proposed as candidates for effective conversion of human-body energy into electricity...

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Section: Materials For Energy Conversion Devicesmentioning

confidence: 99%

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

et al. 2019

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“…The TC, in the two directions, show a converse tendency with an increase in GF content, and apparently the composites exhibit obviously anisotropic characteristics. It is easy to understand of this converse tendency, since the GF possesses a higher intrinsic TC than Cu matrix in the X-Y plane, but a lower intrinsic TC than Cu matrix in the Z direction [32,33]. However, the TiC-coated graphite flake/Cu composites exhibit lower TC than the uncoated one, which can be attributed to two reasons.…”

Section: Bending Strengthmentioning

confidence: 99%

Improvement in Mechanical and Thermal Properties of Graphite Flake/Cu Composites by Introducing TiC Coating on Graphite Flake Surface

Zhang

Liu

et al. 2019

Metals

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In this work, TiC coating was successfully deposited on a graphite flake surface via molten salt technique, for the purpose of promoting the interfacial connection between Cu and graphite flake. Vacuum hot pressing was then employed to prepare TiC-coated graphite flake/Cu composite. The results indicate that introducing TiC coating on graphite flake surface can evidently reduce the pores and gaps at the interface, resulting in a significant improvement on the bending strength. When the TiC-coated graphite flake content is 60 vol%, the bending strength is increased by 58% compared with the uncoated one. The coefficient of thermal expansion dropped from 6.0 ppm·K−1 to 4.4 ppm·K−1, with the corresponding thermal conductivity as high as 571 W·m−1·K−1. The outstanding thermal conductivity, apposite coefficient of thermal expansion, as well as superior processability, make TiC-coated graphite flake/Cu composite a satisfactory electronic packaging material with vast prospect utilized in microelectronic industry.

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“…Since the mean lifetime of radicals in polymerization reactions becomes longer and termination reactions are delayed, the chain length and orientation of the polymer chains synthesized under MF are expected to increase. It has been explained theoretically as well as experimentally that carrier mobility and consequently electrical conductivity is increased by molecular weights of the conductive polymers [14,15,26]. It was reported that the polymers synthesized in an external MF demonstrate increased thermal stability and lower swelling due to their regulated structures.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of poly (3,4-ethylenedioxy thiophene)/poly (sulfonic acid diphenyl aniline) composites synthesized in the absence and presence of magnetic field

Uğraşkan

Karaman

2020

Mater. Res. Express

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Poly(3,4-ethylenedioxy thiophene)/polysulfonic diphenyl aniline (PEDOT:PSDA) composites in the ratios of 1:0.5, 1:1, 1:1.5 and 1:2 were synthesized by oxidative chemical polymerization in the absence and presence of external constant magnetic field which the flux density is 3 kGa. The samples were characterized by UV-vis, FTIR-ATR and XRD. Their thermoelectric properties were obtained by means of electrical conductivities and Seebeck coefficients measurements. It was found that both the conductivity and Seebeck coefficients of the PEDOT:PSDA composites were increased in the presence of magnetic field. The conductivities of PEDOT:PSDA composites are lower whereas their Seebeck coefficients are considerably higher than that of commercial PEDOT:PSS. The highest power factor was obtained as 32 μW m -1 K −2 for the composite PEDOTPSDA=1:1 synthesized in the presence of magnetic field. The power factor of this sample was enhanced to 185 μW m -1 K −2 by a secondary doping with sodium dodecyl benzene sulfonate.

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Recent Advances in Organic Thermoelectric Materials: Principle Mechanisms and Emerging Carbon-Based Green Energy Materials

Cited by 97 publications

References 166 publications

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Fiber‐Based Energy Conversion Devices for Human‐Body Energy Harvesting

Improvement in Mechanical and Thermal Properties of Graphite Flake/Cu Composites by Introducing TiC Coating on Graphite Flake Surface

Thermoelectric properties of poly (3,4-ethylenedioxy thiophene)/poly (sulfonic acid diphenyl aniline) composites synthesized in the absence and presence of magnetic field

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