title: Ultrafast Molecular Stitching of Graphene Films at the Ethanol/Water Interface for High Volumetric Capacitance.
abstract: Compact graphene film electrodes with a high ion-accessible surface area have the promising potential to realize high-density electrochemical energy storage (or high volumetric capacitance), which is vital for the development of flexible, portable, and wearable energy storage devices. Here, a novel, ultrafast strategy for stitching graphene sheets into films, in which p-phenylenediamine (PPD) molecules are uniformly intercalated between the graphene sheets, is simply constructed at the ethanol/water interface. Due to uniformly interlayer spacing (∼1.1 nm), good wettability, and an interconnected ion transport channel, the binder-free PPD-graphene film with a high packing density (1.55 g cm-3) delivers an ultrahigh volumetric capacitance (711 F cm-3at a current density of 0.5 A g-1), high rate performance, high power and energy densities, and excellent cycling stability in aqueous electrolytes. This interfacial stitching strategy holds new promise for the future design of enhanced electrochemical energy-storage devices.
authors.affiliation: State Key Lab of Crystal Materials, Shandong University , Jinan 250100, P. R. China.|School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Gang
authors.initials: G
authors.lastname: Lian
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Chia-Chi
authors.initials: CC
authors.lastname: Tuan
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Liyi
authors.initials: L
authors.lastname: Li
authors.affiliation: State Key Lab of Crystal Materials, Shandong University , Jinan 250100, P. R. China.
authors.forename: Shilong
authors.initials: S
authors.lastname: Jiao
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Kyoung-Sik
authors.initials: KS
authors.lastname: Moon
authors.affiliation: Key Lab for Special Functional Aggregated Materials of Education Ministry, School of Chemistry & Chemical Engineering, Shandong University , Jinan 250100, P. R. China.
authors.forename: Qilong
authors.initials: Q
authors.lastname: Wang
authors.affiliation: State Key Lab of Crystal Materials, Shandong University , Jinan 250100, P. R. China.
authors.forename: Deliang
authors.initials: D
authors.lastname: Cui
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States.
authors.forename: Ching-Ping
authors.identifier: 0000-0003-3556-8053
authors.initials: CP
authors.lastname: Wong
keywords: PPD; Supercapacitors; graphene films; interfacial stitching; volumetric capacitance