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High-performance wood-based thermoelectric sponges for thermal energy harvesting and smart buildings

Nano Research 2024年第6期17卷 5349-5357页

作者： Ding Zhang Qi Li Yanjie Fang Peijia Bai Lili Liu Jiaqi Guo Guangfa Wang Yuetong Zhou Rujun Ma School of Materials Science and Engineering National Institute for Advanced MaterialsSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin 300350China

The development of renewable woods for power generation can help improve the energy efficiency of buildings,and promote the concept design and implementation of“smart buildings”.Here,with specific chemical treatment and hydrothermal synthesis,we demonstrated the practical value of natural wood for thermoelectric power generation in smart *** prepared wood-based thermoelectric sponges show high Seebeck coefficients of 320.5 and 436.6μV/K in the vertical and parallel directions of the longitudinal channel of *** 500 cycles of the compressive strain at 20%,the corresponding Seebeck coefficients increase up to 413.4 and 502.1μV/K,respectively,which is attributed to the improved contact and connection between tellurium thermoelectric *** Seebeck coefficients are much larger than those of most reported inorganic thermoelectric ***,the thermoelectric sponges maintain excellent thermoelectric and mechanical *** further modeled the application value of wood-based thermoelectric sponges in smart buildings for power *** high thermoelectric electricity can be obtained,such as in Beijing with over 1.5 million kWh every year,demonstrating the great potential in thermal energy harvest and energy supply.

关键词： wood thermoelectric effect thermal energy harvesting smart buildings energy supply

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thermal-mechanical-electrical energy conversion system based on Curie effect and soft-contact rotary triboelectric nanogenerator

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Nano Research 2023年第2期16卷 2502-2510页

作者： Xiaole Cao Xuelian Wei Ruonan Li ZhongLin Wang Zhiyi Wu Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA CUSTech Institute of Technology Wenzhou 325024China

Untapped thermal energy,especially low-grade heat below 373 K from various sources,namely ambient,industries residual,and non-concentrated solar energy,is abundant and widely *** that,there are huge constraints to recycle this valuable low-grade heat using the existing technologies due to the variability of thermal energy output and the small temperature difference between the heat source and ***,a thermal-mechanical-electrical energy conversion(TMEc)system based on the Curie effect and the soft-contact rotary triboelectric nanogenerator(TENG)is developed to recycle thermal energy in the mid-low temperature *** to the phase transition mechanism between ferromagnetic and paramagnetic,disk-shaped ferromagnetic materials can realize stable rotation under external magnetic and thermal fields,thus activating the operation of TENGs and realizing the conversion of thermal energy and electrical *** the steady rotation process,an open-circuit voltage(VOC)of 173 V and a short-circuit current(ISC)of 1.32μA are *** finally obtained a maximum power of 4.45 mW in the actual working conditions,and it successfully charged different *** work provides a new method for mid-low temperature energy harvesting and thermal energy transformation and broadens the application of TENG in the field of thermal energy recovery.

关键词： low-grade thermal energy Curie effect triboelectric nanogenerator thermal energy harvesting

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