Flexible thermoelectric foil for wearable energy harvesting

Wan, Chunlei; Tian, Ruoming; Azizi, Azrina Binti; Huang, Yujia; Wei, Qingshuo; Sasai, Ryo; Soontornchaiyakul, Wasusate; Ishida, Takao; Koumoto, Kunihito

doi:10.1016/j.nanoen.2016.09.011

Cited by 97 publications

(91 citation statements)

References 25 publications

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“…For instance, in batteries, larger interlayer distance means the decrease of volumetric energy [133] Copyright 2016, Elsevier. Some ions with larger radius or more charge such as Na + , Mg 2+ can also transport freely in the expanded interlayer.…”

Section: Discussionmentioning

confidence: 99%

“…Due to the relatively high electrical conductivity and lower thermal conductivity, representative thermoelectric semiconductors, such as Bi 2 Te 3 , [129,130] SnSe, [131] and TiS 2 , [132][133][134] have been widely utilized in industry for small-scale cooling components and low temperature power generators. Due to the relatively high electrical conductivity and lower thermal conductivity, representative thermoelectric semiconductors, such as Bi 2 Te 3 , [129,130] SnSe, [131] and TiS 2 , [132][133][134] have been widely utilized in industry for small-scale cooling components and low temperature power generators.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

“…Due to the relatively high electrical conductivity and lower thermal conductivity, representative thermoelectric semiconductors, such as Bi 2 Te 3 , [129,130] SnSe, [131] and TiS 2 , [132][133][134] have been widely utilized in industry for small-scale cooling components and low temperature power generators. [132][133][134] Basing on this point, Wan et al prepared TiS 2 intercalated by organic polymer, which demonstrated an electrical conductivity of 790 S cm −1 and a power factor of 0.45 mW m −1 K −2 . As reported, inserting organic conducting polymers into the interlayer of TMDs can significantly reduce the thermal conductivity and strikingly enhance the flexibility at the same time.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

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Opening Two‐Dimensional Materials for Energy Conversion and Storage: A Concept

Xue

Zhang

Wang

et al. 2017

Advanced Energy Materials

348

211

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The development of two‐dimensional (2D) materials is experiencing a renaissance since the adventure of graphene. 2D materials typically exhibit strong in‐plane covalent bonding and weak out‐of‐plane van der Waals interactions through the interlayer gap. Opening 2D materials is an effective way to alter the physical and chemical properties, such as band gap, conductivity, optical property, thermoelectric property, photovoltaic property and superconductivity. A larger interlayer distance means more accessible active sites for catalysis, an ion‐accessible surface in the interlayer space, which may greatly enhance the performance of 2D materials for energy conversion and storage. Moreover, opening 2D materials by intercalation can change the band filling state and the Fermi level. This review mainly focuses on the opening of 2D materials and their subsequent applications in energy conversion and storage fields, expecting to promote the development of such a new class of materials, namely expanded 2D materials. The exciting progresses of these expanded materials made in both energy conversion and storage devices including solar cells, thermoelectric devices, electrocatalyst, supercapacitors and rechargeable batteries, is presented and discussed in depth. Furthermore, prospects and further developments in these exciting fields of the expanded 2D materials are also commented.

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Section: Discussionmentioning

confidence: 99%

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

“…Due to the relatively high electrical conductivity and lower thermal conductivity, representative thermoelectric semiconductors, such as Bi 2 Te 3 , [129,130] SnSe, [131] and TiS 2 , [132][133][134] have been widely utilized in industry for small-scale cooling components and low temperature power generators. [132][133][134] Basing on this point, Wan et al prepared TiS 2 intercalated by organic polymer, which demonstrated an electrical conductivity of 790 S cm −1 and a power factor of 0.45 mW m −1 K −2 . As reported, inserting organic conducting polymers into the interlayer of TMDs can significantly reduce the thermal conductivity and strikingly enhance the flexibility at the same time.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

See 1 more Smart Citation

Opening Two‐Dimensional Materials for Energy Conversion and Storage: A Concept

Xue

Zhang

Wang

et al. 2017

Advanced Energy Materials

348

211

View full text Add to dashboard Cite

show abstract

“…In this situation, extra charge carries can be generated from intercalation complexes that are formed by chemically bonded organic molecules and inorganic layers . Organic molecules can also endow the superlattice structure with flexibility, since intercalated organic molecules expand the interlayer distance, which enables the development of inorganic layers that are more tolerant toward deformation without deteriorating electrical transport …”

Section: Strategies To Optimize Organic/inorganic Hybridsmentioning

confidence: 99%

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

et al. 2019

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The urgent need for ecofriendly, stable, long‐lifetime power sources is driving the booming market for miniaturized and integrated electronics, including wearable and medical implantable devices. Flexible thermoelectric materials and devices are receiving increasing attention, due to their capability to convert heat into electricity directly by conformably attaching them onto heat sources. Polymer‐based flexible thermoelectric materials are particularly fascinating because of their intrinsic flexibility, affordability, and low toxicity. There are other promising alternatives including inorganic‐based flexible thermoelectrics that have high energy‐conversion efficiency, large power output, and stability at relatively high temperature. Herein, the state‐of‐the‐art in the development of flexible thermoelectric materials and devices is summarized, including exploring the fundamentals behind the performance of flexible thermoelectric materials and devices by relating materials chemistry and physics to properties. By taking insights from carrier and phonon transport, the limitations of high‐performance flexible thermoelectric materials and the underlying mechanisms associated with each optimization strategy are highlighted. Finally, the remaining challenges in flexible thermoelectric materials are discussed in conclusion, and suggestions and a framework to guide future development are provided, which may pave the way for a bright future for flexible thermoelectric devices in the energy market.

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“…Over the past few years, energy harvesters from body heat12345 and ambient available vibrations6789101112 such as human-walking, machine-vibrations, robotic movements, wind, ocean waves and aircrafts, etc. have been widely investigated as means to replace the battery in a system or to realize self-powered sensors131415161718192021.…”

mentioning

confidence: 99%

Broadband Energy Harvester Using Non-linear Polymer Spring and Electromagnetic/Triboelectric Hybrid Mechanism

Gupta

Shi

Dhakar

et al. 2017

Sci Rep

103

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Over the years, several approaches have been devised to widen the operating bandwidth, but most of them can only be triggered at high accelerations. In this work, we investigate a broadband energy harvester based on combination of non-linear stiffening effect and multimodal energy harvesting to obtain high bandwidth over wide range of accelerations (0.1 g–2.0 g). In order to achieve broadband behavior, a polymer based spring exhibiting multimodal energy harvesting is used. Besides, non-linear stiffening effect is introduced by using mechanical stoppers. At low accelerations (<0.5 g), the nearby mode frequencies of polymer spring contribute to broadening characteristics, while proof mass engages with mechanical stoppers to introduce broadening by non-linear stiffening at higher accelerations. The electromagnetic mechanism is employed in this design to enhance its output at low accelerations when triboelectric output is negligible. Our device displays bandwidth of 40 Hz even at low acceleration of 0.1 g and it is increased up to 68 Hz at 2 g. When non-linear stiffening is used along with multimodal energy-harvesting, the obtained bandwidth increases from 23 Hz to 68 Hz with percentage increment of 295% at 1.8 g. Further, we have demonstrated the triboelectric output measured as acceleration sensing signals in terms of voltage and current sensitivity of 4.7 Vg−1 and 19.7 nAg−1, respectively.

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Flexible thermoelectric foil for wearable energy harvesting

Cited by 97 publications

References 25 publications

Opening Two‐Dimensional Materials for Energy Conversion and Storage: A Concept

Opening Two‐Dimensional Materials for Energy Conversion and Storage: A Concept

Flexible Thermoelectric Materials and Generators: Challenges and Innovations

Broadband Energy Harvester Using Non-linear Polymer Spring and Electromagnetic/Triboelectric Hybrid Mechanism

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