Highly Compressible, Thermally Conductive, yet Electrically Insulating Fluorinated Graphene Aerogel

Abstract

Carbon-based aerogels have drawn substantial attention for a wide scope of applications. However, the high intrinsic electrical conductivity limits their potential thermal management application in electronic packaging materials. Herein, a highly compressible, thermally conductive, yet electrically insulating fluorinated graphene aerogel (FGA) is developed through a hydrofluoric acid-assisted hydrothermal process. The macroscopic-assembled FGA constituting of tailored interconnected graphene networks with tunable fluorine coverage shows excellent elasticity and fatigue resistance for compression, despite a low density of 10.6 mg cm–3. Moreover, the aerogel is proved to be highly insulating, with the observed lowest electrical conductivity reaching 4 × 10–7 S cm–1. Meanwhile, the aerogel exhibits prominent heat dissipation performance in a typical cooling procedure, which can be used to fabricate thermoconductive polymer composites for electronic packaging.

Recent Advances in Fluorinated Graphene from Synthesis to Applications: Critical Review on Functional Chemistry and Structure Engineering

“…Therefore, the FGA exhibited great potential to prepare thermoconductive polymer composite materials toward electronic packaging. [51] It is known that boron nitride is the traditional material with thermally conductive yet electrically insulating peculiarity, and here FG also presents great potentials as a novel and advanced material in this field. In fact, FG has showed the higher heat conductivity while maintaining the electrical insulating property.…”

“…Therefore, the FGA exhibited great potential to prepare thermoconductive polymer composite materials toward electronic packaging. [ 51 ]…”

“…[32] However, many new advances have been realized during the latest 5 years. For example, some novel applications of FG have been reported in lubrication, [45][46][47][48][49][50] ice resistance, [44] thermally conductive yet electrically insulating materials, [51][52][53][54][55] biomedicine, [56][57][58][59][60][61][62] and batteries. [63][64][65][66][67][68][69][70][71] Apart from physical properties, chemical properties of FG have been thoroughly analyzed as one important direction in recent years.…”

“…[ 32 ] However, many new advances have been realized during the latest 5 years. For example, some novel applications of FG have been reported in lubrication, [ 45–50 ] ice resistance, [ 44 ] thermally conductive yet electrically insulating materials, [ 51–55 ] biomedicine, [ 56–62 ] and batteries. [ 63–71 ]…”

Mechanically Tunable Spongy Graphene/Cellulose Nanocrystals Hybrid Aerogel by Atmospheric Drying and Its Adsorption Applications

“…With an increase of unload/reload loops, the modulus of CNG-5 decreases gradually and the compressibility tends to be stable (Figure 4c). Most graphene hybrid composites show the similar compressive properties after the residual stress is released [22,23].…”