1 research outputs found
Conjunction of Conducting Polymer Nanostructures with Macroporous Structured Graphene Thin Films for High-Performance Flexible Supercapacitors
Fabrication
of hybridized structures is an effective strategy to promote the performances
of graphene-based composites for energy storage/conversion applications.
In this work, macroporous structured graphene thin films (MGTFs) are
fabricated on various substrates including flexible graphene papers
(GPs) through an ice-crystal-induced phase separation process. The
MGTFs prepared on GPs (MGTF@GPs) are recognized with remarkable features
such as interconnected macroporous configuration, sufficient exfoliation
of the conductive RGO sheets, and good mechanical flexibility. As
such, the flexible MGTF@GPs are demonstrated as a versatile conductive
platform for depositing conducting polymers (CPs), e.g., polyaniline
(PAn), polypyrrole, and polythiophene, through <i>in situ</i> electropolymerization. The contents of the CPs in the composite
films are readily controlled by varying the electropolymerization
time. Notably, electrodeposition of PAn leads to the formation of
nanostructures of PAn nanofibers on the walls of the macroporous structured
RGO framework (PAn@MGTF@GPs): thereafter, the PAn@MGTF@GPs display
a unique structural feature that combine the nanostructures of PAn
nanofibers and the macroporous structures of RGO sheets. Being used
as binder-free electrodes for flexible supercapacitors, the PAn@MGTF@GPs
exhibit excellent electrochemical performance, in particular a high
areal specific capacity (538 mF cm<sup>–2</sup>), high cycling
stability, and remarkable capacitive stability to deformation, due
to the unique electrode structures