Journal
SMALL
Volume 14, Issue 27, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201800534
Keywords
anticorrosion; electromagnetic interference shielding; metal-based sponges; supper-elasticity; ultralightweight
Categories
Funding
- National Natural Science Foundation of China [21571186]
- National Key R&D Project from Minister of Science and Technology of China [2017YFB0406300]
- Research Grants Council of the Hong Kong Special Administrative Region, China, under Theme-based Research Scheme [T23-407/13-N]
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Metal-based materials with exceptional intrinsic conductivity own excellent electromagnetic interference (EMI) shielding performance. However, high density, corrosion susceptibility, and poor flexibility of the metal severely restrict their further applications in the areas of aircraft/aerospace, portable and wearable smart electronics. Herein, a lightweight, flexible, and anticorrosive silver nanowire wrapped carbon hybrid sponge (Ag@C) is fabricated and employed as ultrahigh efficiency EMI shielding material. The interconnected Ag@C hybrid sponges provide an effective way for electron transport, leading to a remarkable conductivity of 363.1 S m(-1) and superb EMI shielding effectiveness of around 70.1 dB in the frequency range of 8.2-18 GHz, while the density is as low as 0.00382 g cm(-3), which are among the best performances for electrically conductive sponges/aerogels/foams by far. More importantly, the Ag@C sponge surprisingly exhibits super-hydrophobicity and strong corrosion resistance. In addition, the hybrid sponges possess excellent mechanical resilience even with a large strain (90% reversible compressibility) and an outstanding cycling stability, which is far better than the bare metallic aerogels, such as silver nanowire aerogels and copper nanowire foams. This strategy provides a facile methodology to fabricate lightweight, flexible, and anticorrosive metal-based sponge for highly efficient EMI shielding applications.
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