Journal article
New structural insights into densely assembled reduced graphene oxide membranes
Advanced Functional Materials, Vol.32(42), 2201535
2022
Abstract
Densely assembled graphene-based membranes have attracted substantial interest for their widespread applications, such as compact capacitive energy storage, ion/molecular separation, gas barrier films, and flexible electronics. However, the multiscale structure of densely packed graphene membranes remains ambiguously understood. This article combines X-ray and light scattering techniques as well as dynamic electrosorption analysis to uncover the stacking structure of the densely stacked reduced graphene oxide (rGO) membranes. The membranes are produced by reducing graphene oxide (GO) membranes with hydrazine, during which the colloidal interactions between GO sheets are modulated by the electrolyte solution. In contrast to the common notion that direct reduction of densely assembled GO sheets in parallel tends to result in significant “graphitization”, this article unexpectedly discovers that the resultant densely packed rGO membrane can still retain the interconnected network nanochannels and show good capacitive performances. This inspires the development of a hierarchical structural model to describe the densely packed rGO membranes. This article further shows that the nanochannel network can be fine-tuned at the sub-nanometer level by tailoring the salt concentration and the reduction temperature to render exceptional volumetric capacitance and good rate performance for rGO membranes even with increased packing density.
Details
- Title
- New structural insights into densely assembled reduced graphene oxide membranes
- Authors/Creators
- Y. Cao (Author/Creator) - The University of MelbourneZ. Xiong (Author/Creator) - The University of MelbourneF. Xia (Author/Creator) - Murdoch UniversityG.V. Franks (Author/Creator) - The University of MelbourneL. Zu (Author/Creator) - The University of MelbourneX. Wang (Author/Creator) - The University of MelbourneY. Hora (Author/Creator) - Monash UniversityS. Mudie (Author/Creator) - Australian SynchrotronZ. He (Author/Creator) - The University of MelbourneL. Qu (Author/Creator) - The University of MelbourneY. Xing (Author/Creator) - Monash UniversityD. Li (Author/Creator) - The University of Melbourne
- Publication Details
- Advanced Functional Materials, Vol.32(42), 2201535
- Publisher
- John Wiley & Sons Ltd.
- Identifiers
- 991005541374707891
- Copyright
- © 2022 The Authors.
- Murdoch Affiliation
- Harry Butler Institute
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Citation topics
- 2 Chemistry
- 2.76 2D Materials
- 2.76.39 Graphene
- Web Of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter
- ESI research areas
- Materials Science