Xiao You1,3,†,*, Huiying Ouyang1,3,5,†, Ruixiang Deng2,†...,**, Qiuqi Zhang1,3,7,†, Zhenzhong Xing1,3,5,†, Xiaowu Chen1,3,†, Qingliang Shan6,†, Jinshan Yang1,3,†, and Shaoming Dong1,3,4,†***|Show fewer author(s)
Author Affiliations
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People’s Republic of China2Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People’s Republic of China3Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People’s Republic of China4Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China5School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, People’s Republic of China6School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People’s Republic of China7University of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of Chinashow less
DOI: 10.1007/s40820-024-01541-y
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Xiao You, Huiying Ouyang, Ruixiang Deng, Qiuqi Zhang, Zhenzhong Xing, Xiaowu Chen, Qingliang Shan, Jinshan Yang, Shaoming Dong. Graphene Aerogel Composites with Self-Organized Nanowires-Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption[J]. Nano-Micro Letters, 2025, 17(1): 047
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【AIGC One Sentence Reading】：Graphene aerogel composites with SiCnws and BN achieve -37.8 dB reflection loss & 9.2 GHz EAB, maintaining performance at high temperatures.
【AIGC Short Abstract】：A novel graphene aerogel composite with a self-organized nanowire-packed honeycomb structure is developed for efficient EM wave absorption. It exhibits a minimum reflection loss of -37.8 dB and a broad EAB of 9.2 GHz, retaining good performance even after high-temperature annealing, thanks to the unique composite design.
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Abstract
With vigorous developments in nanotechnology, the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave absorbers. Herein, a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss capacity. The macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires (SiCnws) grown in situ, while boron nitride (BN) interfacial structure is introduced on graphene nanoplates. The unique composite structure forces multiple scattering of incident EMWs, ensuring the combined effects of interfacial polarization, conduction networks, and magnetic-dielectric synergy. Therefore, the as-prepared composites present a minimum reflection loss value of - 37.8 dB and a wide effective absorption bandwidth (EAB) of 9.2 GHz (from 8.8 to 18.0 GHz) at 2.5 mm. Besides, relying on the intrinsic high-temperature resistance of SiCnws and BN, the EAB also remains above 5.0 GHz after annealing in air environment at 600 °C for 10 h.
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