Electromagnetic Interference Shielding of Graphene Aerogel with Layered Microstructure Fabricated via Mechanical Compression

ACS Applied Materials & Interfaces
Chuan-Bing LiJian-Jun Jiang

Abstract

Graphene aerogel is a promising electromagnetic interference (EMI) shielding material because of its light weight, excellent electrical conductivity, uniform three-dimensional (3D) microporous structure, and good mechanical strength. The graphene aerogel with high EMI shielding performance is attracting considerable critical attention. In this study, a novel procedure to fabricate high EMI shielding graphene aerogel was presented, inspired by the irreversible deformation of hydrogels under mechanical pressure. The procedure involved a mechanical compression step on graphene hydrogels for the purpose of altering microstructures followed by freeze-drying and thermal annealing at 900 °C to generate the final products. Because of the flow of internal liquid caused by mechanical compression, the microstructures of hydrogels changed from a cellular configuration to a layered configuration. After a high degree of compression, GAs can be endowed with homogeneous layered structure and high density, which plays a leading role in electromagnetic wave dissipation. Consequently, the aerogels with excellent electrical conductivity (181.8 S/m) and EMI shielding properties (43.29 dB) could be obtained. Besides, the compression process enabled ...Continue Reading

References

Aug 14, 2010·Advanced Materials·Yanwu ZhuRodney S Ruoff
Aug 25, 2010·ACS Nano·Daniela C MarcanoJames M Tour
Jan 26, 2017·Journal of Colloid and Interface Science·Liying ZhangXiao Hu
Sep 26, 2017·ACS Applied Materials & Interfaces·Wei-Li SongDaining Fang

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