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- W3186307904 abstract "Graphene foam (GF) has grabbed considerable attention for microwave absorption (MA) due to its high specific surface area, rich micro-nano structures and versatile processing. However, restricted by the intrinsic electromagnetic properties of graphene, the MA property of GF is usually unsatisfactory. To further improve the absorption strength of GF, groundbreakingly, the thermoelectric material Bi2Te2.7Se0.3 (BTS) and graphene are combined to form Bi2Te2.7Se0.3/GF (BTSGF) composites through a solvothermal self-assembly method. BTSGF composites have achieved much enhanced MA properties. The minimal reflection loss (RLmin) and the qualified absorption bandwidth of BTS9GF-200 (90 wt% BTS, annealed at 200 °C) reaches improved −73.0 dB and 5.32 GHz, respectively. Meanwhile, BTS3GF-300 (30 wt% BTS, annealed at 300 °C) exhibits an impressive qualified absorption bandwidth of 8.9 GHz and achieves an enhanced RLmin of −58 dB. The enhanced MA performance of BTSGF stems from various synergistic effects of BTS and GF, such as conduction loss and polarization. More importantly, BTS's thermal energy-electric energy conversion capability is believed to can quickly convert heat into electricity and strengthen the attenuation of electromagnetic waves. Therefore, a new electromagnetic wave-thermo-electric loss MA mechanism is proposed, which is of great significance to the study of thermoelectric materials as high-efficiency MA materials." @default.
- W3186307904 created "2021-08-02" @default.
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- W3186307904 date "2021-10-01" @default.
- W3186307904 modified "2023-09-28" @default.
- W3186307904 title "High-performance microwave absorption of 3D Bi2Te2.7Se0.3/Graphene foam" @default.
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- W3186307904 doi "https://doi.org/10.1016/j.carbon.2021.07.049" @default.
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