A Flexible Micro‐Thermoelectric Generator Sticker with Trapezoidal‐Shaped Legs for Large Temperature Gradient and High‐Power Density

Park, Ji Won; Kim, C. S.; Choi, Hyeongdo; Kim, Yong Jun; Lee, Gyu Soup; Cho, Byung Jin

doi:10.1002/admt.202000486

Cited by 15 publications

(4 citation statements)

References 30 publications

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“…That is, a decreased from 2 to 1 mm enabled U out-max increased from 18.96 to 44.53 mV, while P out-max in steady state decreased from 275.74 to 262.89 μW. Considering Bi 2 Te 3 -legs present their highest figure of merit at temperatures of 300-400 K [18][19][20] and their intrinsic brittleness, scrape rate could increase from 10% to 20%-30% when a decrease from 2 to 1 mm (cost about 1050 £/100 g). Thus, fabricated thermoelectric legs with the side length of 1.5 mm above thermal diodes in parallel type was the most cost-effective choice for the following experimental process.…”

Section: Simulation Of Thermoelectric Performance With Thermal-domina...mentioning

confidence: 93%

Thermoelectric Generator Through Dual‐Direction Thermal Regulation by Thermal Diodes for Waste Heat Harvesting

Li,

Jiang,

Tong

et al. 2023

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Thermal energy harvesting provides an opportunity for multi‐node systems to achieve self‐power autonomy. Thermoelectric generators (TEGs), either by thermocouple arrangement with higher‐aspect‐ratios or thermoelectric films overlay, are limited by the small temperature difference and its short‐duration (less than dozens of minutes), hindering the harvesting efficiency. Here, by introducing thermal diodes with dual‐direction thermal regulation ability to optimize the heat flux path, the proposed TEGs exhibit enhanced power‐supply capability with unprecedented long‐duration (more than hours). In contrast with conventional TEGs with fixed‐leg dimensions enabled single output, these compact‐TEGs can supply up to fourteen output‐channels for selection, the produced power ranges from 1.11 to 921.99 µW, open circuit voltage ranges from 8.07 to 51.32 mV, when the natural temperature difference is 53.84 °C. Compared to the most recent TEGs, the proposed TEGs in this study indicate higher power (more than hundreds times) and much longer output duration (2.4–120 times) in a compact manner.

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Section: Simulation Of Thermoelectric Performance With Thermal-domina...mentioning

confidence: 93%

Thermoelectric Generator Through Dual‐Direction Thermal Regulation by Thermal Diodes for Waste Heat Harvesting

Li,

Jiang,

Tong

et al. 2023

Small

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“…The characteristics of our radial TEGs may contribute to the development of selfsufficient power supplies for WSN devices. Radial TEG devices can be wrapped around hot water and steam pipes to harvest waste heat and convert it into usable energy for monitoring sensors that measure temperature, pressure, or steam leakage [13,14]. The obtained power output is sufficient to power various WSN modules that could be used in various condition monitoring devices around the waste heat pipes.…”

Section: 𝐴 2𝑚 𝐴 𝐴mentioning

confidence: 99%

“…Therefore, it becomes essential to develop a self-sufficient power supply that can meet the power requirements of WSNs, thereby eliminating the need to replace/recharge these devices to enable the continuous monitoring of physical data [8][9][10]. As a potential constant and renewable power supply, TEGs can directly convert heat into electrical energy without moving parts while being ecofriendly [11][12][13][14]. TEGs are easy to install and can use any waste heat available.…”

Section: Introductionmentioning

confidence: 99%

Stencil-Printed Scalable Radial Thermoelectric Device Using Sustainable Manufacturing Methods

Jang,

Ambade,

Banerjee

et al. 2024

Sustainability

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In this study, we used n-chitosan-Bi2Te2.7Se0.3 and p-chitosan-Bi0.5Sb1.5Te3 composite inks to print a circular thermoelectric generator (TEG) device using a low-energy-input curing method. Thermoelectric (TE) composite films were fabricated using varying sizes of thermoelectric particles and a small chitosan binder (0.05 wt. %). The particles and binder were hot pressed at an applied pressure of 200 MPa and cured at 200 °C for 30 min. We achieved ZT of 0.35 for the n-type and 0.7 for the p-type TE composite films measured at room temperature. A radial TEG was fabricated using the best-performing n-type and p-type composite inks and achieved a power output of 87 µW and a power density of 727 µW/cm2 at a temperature difference of 35 K; these are among the best-reported values for printed TEG devices. Using a low-energy-input fabrication method, we eliminated the need for high-temperature and long-duration curing processes to fabricate printing devices. Thus, we envisage that the low-energy-input curing process and cost-effective printable strategy presented in this work pave the way for sustainable manufacturing of large-scale energy harvesting TEG devices.

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“…The data are taken from refs. [7,12,50,52,59,62,64,68,70,76,77,83,[91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107][108] devices. The thermoelectric materials used in the flexible thermoelectric devices are usually prepared by deposition or printing methods.…”

Section: Summary and Outlooksmentioning

confidence: 99%

Recent Developments in Flexible Thermoelectric Devices

et al. 2021

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Wearables is a category of electronic devices that can be worn as accessories, embedded in clothing, implanted in the user's body, or even tattooed on the skin. The past decade has witnessed rapid development of wearables in medicine, healthcare, military, and other fields. As predicted by global technology research firm CCS Insight, the market of wearables will reach almost $30 billion and the sales will reach 260 million units in 2023. [1] The rapid development of wearables is originated from the great successes achieved in materials, electronics, and other related techniques. Inversely, it also proposes more requirements to them. One typical example is the battery for the wearables. The appearance of portable chemical battery, especially the ultrathin large capacity lithium battery, makes the service of wearables possible. Inversely, the rapid development of wearables requires the batteries have better flexibility, smaller volume, larger capacity, and longer lifetime. [2] Among them, the longer lifetime of battery is one of the most important issues because the frequently charging process greatly limits the long-term service of wearables, which is particularly critical for the applications in medicine and military fields.Beyond the traditional chemistry battery, self-powered technology is attracting increasing attention in both academic and industry fields because it can provide uninterruptable power supply to wearables. [3] The most promising self-powered technology is thermoelectric technique, which can directly generate power by using the temperature difference between human body and environment based on the Seebeck effect. [4] It has the advantages of silent, reliable, and without moving parts. As early as 1960s, thermoelectric technique has been already used to power the deep space satellite to perform long-term exploration in deep space. Since the last decade of 20th century, due to the energy crisis and aggravated greenhouse gas emissions, the applications of thermoelectric technique were extended to the fields of waste heat harvesting. [5] In these applications, the heat sources usually have large area and thus the rigid thermoelectric materials and planar devices can satisfy the requirements. However, in wearables, the thermoelectric devices should be flexible to well fit the curved surface of human skin and survive under frequently bending process. This makes the development of flexible thermoelectric devices a very challenging task. Currently, flexible thermoelectrics, including flexible thermoelectric materials and devices, has already become a hot topic in thermoelectric community. The number of published academic studies included in Web of Science Database (WOS) relevant to the keywords "flexible thermoelectric material" and "flexible thermoelectric device" is continuously increasing, from 18 in 2010 to 205 in 2019.Flexible organic thermoelectric materials are natural candidates for flexible thermoelectric devices due to their intrinsic flexibility. [6] Likewise, via the help of flexible substrat...

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A Flexible Micro‐Thermoelectric Generator Sticker with Trapezoidal‐Shaped Legs for Large Temperature Gradient and High‐Power Density

Cited by 15 publications

References 30 publications

Thermoelectric Generator Through Dual‐Direction Thermal Regulation by Thermal Diodes for Waste Heat Harvesting

Thermoelectric Generator Through Dual‐Direction Thermal Regulation by Thermal Diodes for Waste Heat Harvesting

Stencil-Printed Scalable Radial Thermoelectric Device Using Sustainable Manufacturing Methods

Recent Developments in Flexible Thermoelectric Devices

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