Lightweight Kevlar-Reinforced Graphene Oxide Architectures with High Strength for Energy Storage Academic Article uri icon

abstract

  • AbstractA multifunctional supercapacitor based on reduced graphene oxide (rGO) hydrogels deposited onto Kevlar fibers and woven cloth is reported, which exhibits both excellent mechanical performance and electrochemical energy storage. The specific strength of rGO hydrogelKevlar fibers reaches 1.6 MPa m3 kg1 and the specific capacitance is 57 F g1 with 38.1% of rGO. Such high specific strength is comparable to one of the asreceived Kevlar fibers (2.0 MPa m3 kg1), indicating that the gelation process does not harm the fibers. The gelstate symmetric device based on rGO hydrogelKevlar cloth survives impact from a 9.1 N force from a falling metal ball as well as deformation during bending to 90. The high specific strength is due to the Kevlar while the specific capacitance stems from the 3D interconnected macrostructure of rGO hydrogels. To demonstrate the combination of these properties, a multifunctional efficiency is introduced based on the geometric average of mechanical and energy storage properties as compared to epoxy and carbon aerogel supercapacitor, respectively. This metric predicts an optimum combination or properties at a volume ratio of Kevlar/rGO gel between 0.0008 and 0.35.

published proceedings

  • ADVANCED MATERIALS INTERFACES

altmetric score

  • 4.2

author list (cited authors)

  • Sun, W., Shah, S. A., Lowery, J. L., Oh, J. H., Lutkenhaus, J. L., & Green, M. J.

citation count

  • 14

complete list of authors

  • Sun, Wanmei||Shah, Smit A||Lowery, Joseph L||Oh, Ju Hyun||Lutkenhaus, Jodie L||Green, Micah J

publication date

  • November 2019

publisher