title: Polyaniline-Modified Oriented Graphene Hydrogel Film as the Free-Standing Electrode for Flexible Solid-State Supercapacitors.
abstract: In this study, we report polyaniline (PANI)-modified oriented graphene hydrogel (OGH) films as the free-standing electrode for flexible solid-state supercapacitors (SCs). The OGH films are prepared by a facile filtration method using chemically converted graphene sheets and then introduced to PANI on the surface of OGH films by in situ chemical polymerization. The PANI-modified OGH films possess high flexibility, high electrical conductivity, and mechanical robustness. The flexible solid-state SCs based on the PANI-modified OGH films exhibit a specific capacitance of 530 F/g, keeping 80% of its original value up to 10 000 charge-discharge cycles at the current density of 10 A/g. Remarkably, the flexible solid-state SCs maintain ∼100% capacitance retention bent at 180° for 250 cycles. Moreover, the flexible solid-state SCs are further demonstrated to be able to light up a red-light-emitting diode. These results indicate that the flexible solid-state SCs based on PANI-modified OGH films as the free-standing electrode have potential applications as energy-storage devices.
authors.affiliation: College of Polymer Science and Polymer Engineering, The University of Akron , Akron, Ohio 44325, United States.|College of Chemistry and Chemical Engineering, Lanzhou University , Lanzhou, P. R. China , 730000.
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Du
authors.affiliation: College of Polymer Science and Polymer Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Huckleberry C
authors.initials: HC
authors.lastname: Liu
authors.affiliation: College of Polymer Science and Polymer Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Chao
authors.initials: C
authors.lastname: Yi
authors.affiliation: College of Polymer Science and Polymer Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Kai
authors.initials: K
authors.lastname: Wang
authors.affiliation: College of Polymer Science and Polymer Engineering, The University of Akron , Akron, Ohio 44325, United States.
authors.forename: Xiong
authors.initials: X
authors.lastname: Gong
keywords: flexible; graphene; polyaniline; solid-state; supercapacitors