writer：M. A. Memon, W. Bai, J. Sun, M. Imran, S. N. Phulpoto, S. Yan, Y. Huang, J. Geng,*
keywords：Macroporous structured graphene thin films, Graphene papers, Conducting polymers, Electropolymerization, Flexible supercapacitors
source：期刊
specific source：ACS Appl. Mater. Interfaces 2016, 8, 11711-11719
Issue time：2016年
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 flexibleMGTF@GPs are demonstrated as a versatile conductive platform for depositing conducting polymers (CPs), e.g., polyaniline (PAn), polypyrrole, and polythiophene, through in situ 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(-2)), high cycling stability, and remarkable capacitive stability to, deformation, due to the unique electrode structures.