articleAdvanced Functional MaterialsFeb 26, 2025BRONZE OA

Polyimide Derived Carbon/Graphene Hybrid Aerogel Microspheres for Strong and Wide Bandwidth Microwave Absorption

YCYifan CaiZWZhanhua WangGFGuoxia FeiMLMarino LavorgnaHXHesheng Xia

Sichuan University · National Research Council · +1 more institution

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Abstract

Abstract Graphene‐based aerogel microspheres (GAMs) are effective electromagnetic wave (EMW) absorbers due to their excellent impedance matching and high loss capabilities. The main challenge in the development of GAMs is to improve their dielectric loss and also the mechanical strengthto meet practical application requirements. Herein, the polyimide derived carbon/graphene hybrid aerogel microspheres (PI∼NC‐GAMs) are prepared by high‐pressure spraying, freeze shaping, freeze drying, in‐situ thermal reduction and imidization, and high temperature pyrolysis. Due to the reinforcing and supporting effect of the PI‐derived carbon layer, the prepared ultralight hybrid PI∼NC‐GAMs with a low packing density have a…

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45
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100%
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5

Topics & keywords

Topics
Keywords
  • Materials science
  • Aerogel
  • Polyimide
  • Microwave
  • Graphene
  • Microsphere
  • Absorption (acoustics)
  • Optoelectronics
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