High‐Performance Flexible Thermoelectric Devices Based on All‐Inorganic Hybrid Films for Harvesting Low‐Grade Heat

2019 ◽  
Vol 29 (25) ◽  
pp. 1900304 ◽  
Author(s):  
Bo Wu ◽  
Yang Guo ◽  
Chengyi Hou ◽  
Qinghong Zhang ◽  
Yaogang Li ◽  
...  
Keyword(s):  
High Performance ◽  
Low Grade ◽  
Hybrid Films ◽  
Thermoelectric Devices ◽  
Inorganic Hybrid ◽  
Low Grade Heat ◽  
Flexible Thermoelectric

Flexible low-grade energy utilization devices based on high-performance thermoelectric polyaniline/tellurium nanorod hybrid films

2016 ◽  
Vol 4 (9) ◽  
pp. 3554-3559 ◽  
Author(s):  
Y. Wang ◽  
S. M. Zhang ◽  
Y. Deng
Keyword(s):  
Energy Conversion ◽  
High Performance ◽  
Low Cost ◽  
Energy Utilization ◽  
Low Grade ◽  
Thermoelectric Generation ◽  
Hybrid Films ◽  
Direct Energy ◽  
Low Grade Heat ◽  
Polymer Thermoelectric

Solution based polymer thermoelectric generation technologies provide a low-cost and eco-friendly means of direct energy conversion from low-grade heat to electricity.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

scholarly journals Towards tellurium-free thermoelectric modules for power generation from low-grade heat

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Pingjun Ying ◽  
Ran He ◽  
Jun Mao ◽  
Qihao Zhang ◽  
Heiko Reith ◽  
...  
Keyword(s):  
Power Generation ◽  
Thermoelectric Properties ◽  
Conversion Efficiency ◽  
High Performance ◽  
State Of The Art ◽  
Low Grade ◽  
Thermoelectric Modules ◽  
P Type ◽  
Low Grade Heat ◽  
Promising Source

AbstractThermoelectric technology converts heat into electricity directly and is a promising source of clean electricity. Commercial thermoelectric modules have relied on Bi2Te3-based compounds because of their unparalleled thermoelectric properties at temperatures associated with low-grade heat (<550 K). However, the scarcity of elemental Te greatly limits the applicability of such modules. Here we report the performance of thermoelectric modules assembled from Bi2Te3-substitute compounds, including p-type MgAgSb and n-type Mg3(Sb,Bi)2, by using a simple, versatile, and thus scalable processing routine. For a temperature difference of ~250 K, whereas a single-stage module displayed a conversion efficiency of ~6.5%, a module using segmented n-type legs displayed a record efficiency of ~7.0% that is comparable to the state-of-the-art Bi2Te3-based thermoelectric modules. Our work demonstrates the feasibility and scalability of high-performance thermoelectric modules based on sustainable elements for recovering low-grade heat.

A flexible thermoelectric film based on Bi2Te3 for wearable applications

2021 ◽  
Author(s):  
Changxin Liu ◽  
Kaiyuan Zhao ◽  
Yuhang Fan ◽  
Yu Gao ◽  
Zhenghui Zhou ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermoelectric Materials ◽  
High Performance ◽  
Thermoelectric Devices ◽  
Simple Method ◽  
Pdms Film ◽  
Cu Substrate ◽  
Text Type ◽  
Thermoelectric Thin Film ◽  
Flexible Thermoelectric

In recent years, with the development of the Internet of Things (IoT) and wearable technology, the research and exploration of thermoelectric materials have been greatly promoted. However, traditional thermoelectric materials are rigid and brittle. Thermoelectric devices made of these materials usually cannot be closely attached to the heat and cold sources that provide temperature differences, thus limiting the application of thermoelectric materials. Therefore, manufacturing new high-performance flexible thermoelectric devices is still a huge challenge. In this work, polyimide/copper (PI/Cu) substrate was deposited by electron deposition technology. The flexible thermoelectric thin film device was fabricated by bonding [Formula: see text]-type and [Formula: see text]-type bismuth telluride (Bi2Te[Formula: see text] slurries onto the PI/Cu substrate. Then, the PDMS film was coated on the device to make the device waterproof and oxidation resistant. The output voltage and maximum power of this device, at the temperature of 80 K, reach 97.5 mV and 60 uW, respectively. After 200 cycles of cyclic bending experiments, 90% high conductivity retention can be maintained. It demonstrates that the new flexible thermoelectric thin film has good flexibility and excellent stability. This work provides a simple method for the preparation of flexible thermoelectric thin films and opens up a new way for its application in the sensing equipment and wearable device of the IoT.

Printed flexible thermoelectric materials and devices

2021 ◽  
Author(s):  
Jiaqing Zang ◽  
Jiayi Chen ◽  
Zhewei Chen ◽  
Ya Li ◽  
Jiye Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Thermoelectric Materials ◽  
Rapid Development ◽  
Low Grade ◽  
Application Potential ◽  
Low Grade Heat ◽  
Flexible Thermoelectric ◽  
Solid State Cooling

The innate capability of direct heat-electricity conversion endows thermoelectric (TE) materials great application potential in the fields of low-grade heat harvesting, solid-state cooling, and sensing. Recently, the rapid development of...

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