A flexible electromagnetic wave-electricity harvester

Hualiang Lv, Zhihong Yang, Bo Liu, Guanglei Wu, Zhichao Lou, Ben Fei and Renbing Wu ()
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Hualiang Lv: Fudan University
Zhihong Yang: Nanjing University of Aeronautics and Astronautics
Bo Liu: Hunan University
Guanglei Wu: Qingdao University
Zhichao Lou: Nanjing Forestry University
Ben Fei: Fudan University
Renbing Wu: Fudan University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Developing an ultimate electromagnetic (EM)-absorbing material that can not only dissipate EM energy but also convert the generated heat into electricity is highly desired but remains a significant challenge. Here, we report a hybrid Sn@C composite with a biological cell-like splitting ability to address this challenge. The composite consisting of Sn nanoparticles embedded within porous carbon would split under a cycled annealing treatment, leading to more dispersed nanoparticles with an ultrasmall size. Benefiting from an electron-transmitting but a phonon-blocking structure created by the splitting behavior, an EM wave-electricity device constructed by the optimum Sn@C composite could achieve an efficiency of EM to heat at widely used frequency region and a maximum thermoelectric figure of merit of 0.62 at 473 K, as well as a constant output voltage and power under the condition of microwave radiation. This work provides a promising solution for solving EM interference with self-powered EM devices.

Date: 2021
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DOI: 10.1038/s41467-021-21103-9

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