Stretchable helical architecture inorganic-organic hetero thermoelectric generator

Rojas, Jhonathan Prieto; Singh, Devendrá; Castells-Rufas, David; Arevalo, Arpys; Foulds, Ian G.; Hussain, Muhammad Mustafa

doi:10.1016/j.nanoen.2016.10.054

Cited by 61 publications

(58 citation statements)

References 57 publications

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“…A simpler fabrication process was achieved with a much lower resistance. Furthermore, the performance of this second implementation was compared with polyester-paper material as substrate and with the same TE materials 25 . It is important to highlight that all these implementations were stretchable thanks to the helix/spiral structures.…”

Section: Materials and Designsmentioning

confidence: 99%

“…The released spirals, from the soft mold, were sequentially sputtered with the TE materials. Finally, the Au/Ti was sputtered as interconnect between the TE materials 25 .…”

Section: Stretchable Tegsmentioning

confidence: 99%

“…These masks were employed for the deposition of the TE materials to the thickness of ~2 μm. To reduce the internal electrical resistance, both sides (top and down) of the helix/spirals were sputtered with the TE materials 25 . …”

Section: Stretchable Tegsmentioning

confidence: 99%

“…Therefore, efforts are underway to devise new ways to develop power sources with same mechanical properties as the devices themselves, such as flexibility and even stretchability. Hence, development of a stretchable and flexible energy harvester might become the solution to this very important issue 25 .…”

Section: Introductionmentioning

confidence: 99%

“…Thermoelectric generators (TEGs) are capable of harvesting energy through a temperature gradient, thus providing an environment friendly power source by harvesting this wasted energy 29,30,35 . A larger temperature difference between the hot and cold ends of a TEG result in higher output power 25 . Consequently, the development of a fully stretchable and foldable TEG, would allow us to produce adaptive output power by controlling the distance between the hot and cold ends, thus the temperature difference itself as shown in Figure 1 25 .…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Folding and stretching a thermoelectric generator

Rojas

Rehman

Albettar

et al. 2018

Micro- And Nanotechnology Sensors, Systems, and Applications X

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Columbia, Canada V1V1V7. ABSTRACTAs we are at the verge of entering the era of Internet-of-Things (IoT), there is a clear need to produce continuous power supply to the huge amount of electronic devices that must be wirelessly interconnected and operate uninterruptedly. At the same time, new mechanical constrains arise from the fact that these devices should be ubiquitous, which leads to the need of lightweight and mechanical compliance to any shape or surface. As an important renewable energy source, a mechanically adaptable thermoelectric generator (TEG) can make use of the usually wasted thermal differences between ambient and technology-users to power-up such systems. With this idea in mind, we have developed a simple approach to fabricate TEGs, based on commonly available substrates (paper or polymers) and assisted through simple folding and cutting techniques (born from origami and kirigami) to form strategic structures (serpentine, helical, spiral, etc.) with the mechanical advantage of foldability and over 100% demonstrated stretchability. The use of these methods and structures allows the mechanical reconfigurability of the devices to, for example, increase the temperature difference in a TEG, thus its power, or allow a more efficient use of area and therefore increase the power density. We will discuss the strategies to effectively integrate folding and cutting techniques with common materials and the basic TEG configuration, as well as demonstrate the devices' implementation and characterization. Finally, we believe our simple integration approach offers an interesting and versatile methodology, which can be easily extrapolated to new materials and technologies for a greater variety of applications.

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Section: Materials and Designsmentioning

confidence: 99%

“…The released spirals, from the soft mold, were sequentially sputtered with the TE materials. Finally, the Au/Ti was sputtered as interconnect between the TE materials 25 .…”

Section: Stretchable Tegsmentioning

confidence: 99%

Section: Stretchable Tegsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Folding and stretching a thermoelectric generator

Rojas

Rehman

Albettar

et al. 2018

Micro- And Nanotechnology Sensors, Systems, and Applications X

Self Cite

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Self‐Healable and Stretchable Organic Thermoelectric Materials: Electrically Percolated Polymer Nanowires Embedded in Thermoplastic Elastomer Matrix

Jeong

Jung

Suh

et al. 2019

Adv Funct Materials

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Self‐healable and stretchable energy‐harvesting materials can provide a new avenue for the realization of self‐powered wearable electronics, including electronic skins, whose main materials are required to be robust to and stable under external damage and severe mechanical stresses. However, thermoelectric (TE) materials showing both self‐healing properties and stretchability have not yet been demonstrated despite their great potential to harvest thermal energy in the human body. As most existing TE materials are either mechanically brittle or unrecoverable after being subjected to damage, a novel approach is necessary for designing such materials. Herein, self‐healable and stretchable TE materials based on all‐organic composite system wherein polymer semiconductor nanowires are p‐doped with a molecular dopant and embedded in a thermoplastic elastomer matrix are reported. The polymer nanowires are electrically percolated in the matrix, and the resulting composite materials exhibit good TE performance. The composites also exhibit both excellent self‐healing properties under mild heat and pressure conditions and good stretchability. It is believed that this work can be a cornerstone for the design of self‐healable and stretchable energy‐harvesting materials as it provides useful guidelines for imparting electrical conductivity to insulating thermoplastic elastomers, which typically possess versatile and useful mechanical properties.

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Stretchable and Transparent Ionogels with High Thermoelectric Properties

Fang

Cheng

et al. 2020

Adv Funct Materials

182

223

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Stretchable electronic materials and devices have important applications in flexible electronic systems including wearable electronics and bioelectronics. Convenient electricity generation such as thermoelectric conversion is required for the flexible electronic systems. Hence, it is development of high‐performance thermoelectric materials with high mechanical stretchability would be highly desirable. Here, stretchable and transparent ionogels with high thermoelectric properties are demonstrated. The ionogels made of elastomeric waterborne polyurethane and 1‐ethyl‐3‐methylimidazolium dicyanamide (EMIM:DCA, an ionic liquid) are prepared by solution processing. Their mechanical and electrical properties depend on the loading of EMIM:DCA. The ionogels with 40 wt% EMIM:DCA can have a high mechanical stretchability of up to 156%, low tensile strength of 0.6 MPa, and low Young's modulus of 0.6 MPa. They also exhibit a high ionic thermovoltage of 34.5 mV K−1, high ionic conductivity of 8.4 mS cm−1 and low thermal conductivity of 0.23 W m−1 K−1 at a relative humidity of 90%. As a result, it can have a high ionic figure of merit (ZTi) of 1.3 ± 0.2. Both the thermovoltage and the ZTi value are the highest for stretchable thermoelectric materials. They can be used in ionic thermoelectric capacitors to convert heat into electricity.

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Stretchable helical architecture inorganic-organic hetero thermoelectric generator

Cited by 61 publications

References 57 publications

Folding and stretching a thermoelectric generator

Folding and stretching a thermoelectric generator

Self‐Healable and Stretchable Organic Thermoelectric Materials: Electrically Percolated Polymer Nanowires Embedded in Thermoplastic Elastomer Matrix

Stretchable and Transparent Ionogels with High Thermoelectric Properties

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