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Title: Ultralight and Highly Elastic Graphene/Lignin-Derived Carbon Nanocomposite Aerogels with Ultrahigh Electromagnetic Interference Shielding Performance
Authors: Zhang, Youfang
Wang, Peiyu
Pei, Yongmao
Chen, Mingji
Lu, Xuehong
Zeng, Zhihui
Wang, Changxian
Seyed Shahabadi, Seyed Ismail
Keywords: Porous Architectures
Issue Date: 2018
Source: Zeng, Z., Wang, C., Zhang, Y., Wang, P., Seyed Shahabadi, S. I., Pei, Y., et al. (2018). Ultralight and Highly Elastic Graphene/Lignin-Derived Carbon Nanocomposite Aerogels with Ultrahigh Electromagnetic Interference Shielding Performance. ACS Applied Materials and Interfaces, 10 (9), 8205–8213.
Series/Report no.: ACS Applied Materials and Interfaces
Abstract: Ultralight and highly elastic reduced graphene oxide (RGO)/lignin-derived carbon (LDC) composite aerogels with aligned micron-sized pores and cell walls are prepared using a facile freeze-drying method. The presence of a small fraction of LDC in the cell walls enhances the interfacial polarization effect while almost maintaining the amount of charge carriers and conductivity of the cell walls, greatly boosting the wave absorption capability of the cell walls. RGO/LDC aerogels also show a greater number of large cell walls with better integrity than RGO aerogels, further improving the multiple reflection ability of the aligned cell walls. Synergistic effects of the multiphase cell walls and the preferred microstructures of the RGO/LDC aerogels lead to their high electromagnetic interference (EMI) shielding effectiveness of 21.3–49.2 dB at an ultralow density of 2.0–8.0 mg/cm3. This corresponds to the surface-specific SE (SE divided by density and thickness) up to 53 250 dB·cm2/g, which is higher than the values reported for other carbon- and metal-based shields. Furthermore, the critical roles that microstructures play in determining the EMI shielding performance are directly revealed by comparing the shielding performance in directions parallel and normal to cell walls, as well as in an in situ compression process.
ISSN: 1944-8244
DOI: 10.1021/acsami.7b19427
Rights: © 2018 American Chemical Society (ACS). This is the author created version of a work that has been peer reviewed and accepted for publication by ACS Applied Materials and Interfaces, American Chemical Society (ACS). It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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