High Thermoelectric Performance in n‐Type Perylene Bisimide Induced by the Soret Effect

Jiang, Qinglin; Sun, Hengda; Zhao, Duokai; Zhang, Fengling; Hu, Dehua; Jiao, Fei; Qin, Leiqiang; Linseis, Vincent; Fabiano, Simone; Crispin, Xavier; Ma, Yan; Cao, Yong

doi:10.1002/adma.202002752

Cited by 58 publications

(60 citation statements)

References 45 publications

(67 reference statements)

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“…The expected P max considering the experimentally measured Seebeck coefficient at thermoelement level ( S = +15.8 µV·K −1 ) for the SWCNT at 1.0 wt.%, shown in Figure 2 , would be 0.789 μW at ∆ T = 60 K, which was also the highest temperature gradient used in this study to characterize the performance of the TEG device. However, the P max of the device, considering the experimentally measured V out and the second part of Equation (3), was calculated to be 0.695 µW at ∆ T = 60 K. Moreover, it should be mentioned that in the present study, thermoelectrically generated electronic charge carriers were the ones to contribute to the thermoelectric measured effect, in contrast to plausible mixed thermoelectrically generated carriers, i.e., electronic and ionic charge carriers, as reported in other studies, which resulted also in significantly high experimentally measured Seebeck coefficient values [ 44 ].…”

Section: Resultssupporting

confidence: 69%

Thermoelectric Energy Harvesting from Single-Walled Carbon Nanotube Alkali-Activated Nanocomposites Produced from Industrial Waste Materials

Davoodabadi¹,

Vareli

Liebscher³

et al. 2021

Nanomaterials

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A waste-originated one-part alkali-activated nanocomposite is introduced herein as a novel thermoelectric material. For this purpose, single-walled carbon nanotubes (SWCNTs) were utilized as nanoinclusions to create an electrically conductive network within the investigated alkali-activated construction material. Thermoelectric and microstructure characteristics of SWCNT-alkali-activated nanocomposites were assessed after 28 days. Nanocomposites with 1.0 wt.% SWCNTs exhibited a multifunctional behavior, a combination of structural load-bearing, electrical conductivity, and thermoelectric response. These nanocomposites (1.0 wt.%) achieved the highest thermoelectric performance in terms of power factor (PF), compared to the lower SWCNTs’ incorporations, namely 0.1 and 0.5 wt.%. The measured electrical conductivity (σ) and Seebeck coefficient (S) were 1660 S·m−1 and 15.8 µV·K−1, respectively, which led to a power factor of 0.414 μW·m−1·K−2. Consequently, they have been utilized as the building block of a thermoelectric generator (TEG) device, which demonstrated a maximum power output (Pout) of 0.695 µW, with a power density (PD) of 372 nW·m−2, upon exposure to a temperature gradient of 60 K. The presented SWCNT-alkali-activated nanocomposites could establish the pathway towards waste thermal energy harvesting and future sustainable civil engineering structures.

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Section: Resultssupporting

confidence: 69%

Thermoelectric Energy Harvesting from Single-Walled Carbon Nanotube Alkali-Activated Nanocomposites Produced from Industrial Waste Materials

Davoodabadi¹,

Vareli

Liebscher³

et al. 2021

Nanomaterials

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“…RH, as shown in Fig. 1d, which is significantly higher than some recently reported i-TE materials such as PEO-NaOH (0.014) 15 , PSSNa (0.013) 39 and PVDF-HFP/EMMI:TFSI (0.007) 8 and close to the tetrachloro-perylene bisimide (4Cl-PBI) (0.23) 40 , PVDF-HFP-EMIM:DCA (0.75) 7 . The original porous morphologies of T-PhNPs gradually became more dense structures and the pores were even fulfilled at higher concentrations of the TPFPB ( Supplementary Fig.…”

mentioning

confidence: 62%

Tailoring P-N Conversion in All-solid-state Polymer Composites with A Record Ionic Thermopower

Chi¹,

An²,

Qi³

et al. 2021

Preprint

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All-solid-state organic polymer composites are promising ionic thermoelectric (i-TE) materials, however, the transition from aqueous to organic gelation always sacrifices their thermoelectric performance, especially the n-type thermopowers are severely unexplored, leaving the unrealized large-scale application of p-n integrated i-TE devices. Herein, we successfully developed all-solid-state PVDF-HFP/NaTFSI/PC (PhNP) with ultrahigh thermopower (Si) of +20 mV K-1. The experimental and molecular simulation results detailly specified the relationship between the interactions among ions and polymers and the highly enhanced thermopower. Meanwhile, a major scientific breakthrough in p-n conversion from +20 to -6 mV K-1 was achieved by incorporating tris(pentafluorophenyl)borane (TPFPB) to capture Na+ and TFSI- anions dominating the thermodiffusion process. As a result, an all-solid-state i-TE generator generated a high voltage over 2.6 V at ΔT=10 K and exhibited excellent cyclic stability under ambient air condition employing only 13 pairs of p-n couples, showing great potential for developing high-performance i-TE systems.

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“…Our group proposed a mixed organic ion‐electron n‐type conductor based on highly crystalline and reduced perylene bisimide ( Figure a). [ 21 ] Quasi‐frozen ionic carriers yielded a large ionic Seebeck coefficient of −3021 µV K –1 while electronic carriers dominated electrical conductivity, which was as high as 0.18 S cm –1 at 60% RH. The overall power factor was remarkably high (165 µW mK –2 ), with ZT = 0.23 at room temperature.…”

Section: Challengesmentioning

confidence: 99%

Section: Challengesmentioning

confidence: 99%

“…[12][13][14][15][16][17] The ZT values of nanostructured (Bi,Sb) 2 Te 3 was improved to 1.75 at room temperature by Liu et al [18] By contrast, ZT value of the organic TE materials were improved to 10 -1 by doping engineering. [19][20][21][22] From the perspective of wearable, the TE materials should be durable above 30% mechanically strain to meet the dynamic motions carried out by a living body (e.g., bending, stretching, and folding). [23] Due to the fact that rigid and bulky material are hard to be used in wearable devices, various strategies were proposed to improve their mechanical properties and comfort.…”

Section: Introductionmentioning

confidence: 99%

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Wearable Thermoelectric Materials and Devices for Self‐Powered Electronic Systems

et al. 2021

Self Cite

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Because of their readiness and high power bandwidth, batteries are the preeminent source of power supply for portable electronics, but are subject to periodic recharging and replacement. Hence, a key challenge is to design suitable and sustainable power sources for portable electronic devices. Harvesting energy from the human body is suitable for providing consistent and uninterrupted energy for wearable electronic devices. The daily activities of a 68-kg adult can generate over 100 W of power, through breathing, heating, blood transport, and walking. [3] Thus, converting 1% of the power generated by the human body may be enough to support the work of most portable electronics. Various energy-harvesting technologies, such as, triboelectric nanogenerators (TENGs), [4][5][6] piezoelectric nanogenerators, [7] and thermoelectric generators (TEGs), [8] have been developed to convert human energy (from human motion and body heat) into electricity. In line with recent developments in wearable electronics and e-skins, the use of a self-powered direct-current (DC) electric power supplier is inevitable for activating human body-adjustable electronic systems. [9] Among the various energy-autonomous devices, [10] only TEGs can permanently produce DC electric power without complex power managing components, and they are maintenance free. Moreover, solar energy and vibration-based energy harvesters areThe emergence of artificial intelligence and the Internet of Things has led to a growing demand for wearable and maintenance-free power sources. The continual push toward lower operating voltages and power consumption in modern integrated circuits has made the development of devices powered by body heat finally feasible. In this context, thermoelectric (TE) materials have emerged as promising candidates for the effective conversion of body heat into electricity to power wearable devices without being limited by environmental conditions. Driven by rapid advances in processing technology and the performance of TE materials over the past two decades, wearable thermoelectric generators (WTEGs) have gradually become more flexible and stretchable so that they can be used on complex and dynamic surfaces. In this review, the functional materials, processing techniques, and strategies for the device design of different types of WTEGs are comprehensively covered. Wearable self-powered systems based on WTEGs are summarized, including multi-function TE modules, hybrid energy harvesting, and all-in-one energy devices. Challenges in organic TE materials, interfacial engineering, and assessments of device performance are discussed, and suggestions for future developments in the area are provided. This review will promote the rapid implementation of wearable TE materials and devices in self-powered electronic systems.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202102990.

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High Thermoelectric Performance in n‐Type Perylene Bisimide Induced by the Soret Effect

Cited by 58 publications

References 45 publications

Thermoelectric Energy Harvesting from Single-Walled Carbon Nanotube Alkali-Activated Nanocomposites Produced from Industrial Waste Materials

Thermoelectric Energy Harvesting from Single-Walled Carbon Nanotube Alkali-Activated Nanocomposites Produced from Industrial Waste Materials

Tailoring P-N Conversion in All-solid-state Polymer Composites with A Record Ionic Thermopower

Wearable Thermoelectric Materials and Devices for Self‐Powered Electronic Systems

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