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

作　　者：Xiaole Cao Xuelian Wei Ruonan Li ZhongLin Wang Zhiyi Wu 

机构地区：[1]Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,China [2]School of Nanoscience and Technology,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA [4]CUSTech Institute of Technology,Wenzhou 325024,China

出　　处：《Nano Research》2023年第2期2502-2510,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61503051).

摘　　要：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 accessible.Despite 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 environment.Here,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 range.According 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 energy.During the steady rotation process,an open-circuit voltage(VOC)of 173 V and a short-circuit current(ISC)of 1.32μA are measured.We finally obtained a maximum power of 4.45 mW in the actual working conditions,and it successfully charged different capacitors.This 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 

分 类 号：TM31[电气工程—电机] TP391.44[自动化与计算机技术—计算机应用技术] TN929.5[自动化与计算机技术—计算机科学与技术]