Journal article
Reduced graphene oxide as a multi-functional conductive binder for supercapacitor electrodes
Energy Storage Materials, v 12, pp 128-136
May 2018
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
To date, significant effort has been focused on the active materials in the supercapacitor electrodes. However, very little has been done for the binder materials. Insulating fluorinated polymer binders, which are used for fabrication of carbon electrodes in supercapacitors, reduce electrode conductivity, capacitance, and rate performance. Here we propose to use reduced graphene oxide (rGO) as a multi-functional conductive binder as a general strategy for manufacturing freestanding, flexible, high-performance supercapacitor electrodes from various micron-sized porous carbons. The two-dimensional structure, high specific surface area and effective electronic conductivity of rGO enable us to eliminate the addition of insulating binder, conductive additive, and current collector. The synergetic effect of rGO with carbon materials produces a 3D conductive network and enlarges the electrode/electrolyte interface, enhancing electrode capacitance and rate performance in both aqueous and non-aqueous electrolytes. Using rGO as a binder, we prepared various high-performance and flexible electrodes from activated carbon powders, fibers and spheres, in which both the composition and thickness are controllable. This demonstrates that rGO can be used as a binder for porous carbons with different morphologies. As this strategy is environmentally friendly and easy to scale-up, we believe it is a promising method for fabrication of all-carbon and composite electrodes.
Using rGO as a multi-functional conductive binder, we propose a novel strategy to fabricate freestanding, flexible, and high-performance carbon electrodes for supercapacitors. The synergetic effect between rGO and porous carbon materials results in significantly improved electrode capacitance and rate performance in both aqueous and non-aqueous electrolytes. Various porous carbons with different morphologies and sizes can be fabricated into electrodes with tunable areal mass and thickness using rGO as a binder. [Display omitted]
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Details
- Title
- Reduced graphene oxide as a multi-functional conductive binder for supercapacitor electrodes
- Creators
- Bin Xu - State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaHaoran Wang - State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaQizhen Zhu - State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaNing Sun - State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaBabak Anasori - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USALongfeng Hu - State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaFeng Wang - State Key Laboratory of Organic-Inorganic Composites, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, ChinaYibiao Guan - State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems, China Electric Power Research Institute, Beijing 100192, ChinaYury Gogotsi - Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Energy Storage Materials, v 12, pp 128-136
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000428083400017
- Scopus ID
- 2-s2.0-85038219777
- Other Identifier
- 991014970144304721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology