Journal article
Graphene-containing flowable electrodes for capacitive energy storage
Carbon (New York), v 92(C), pp 142-149
Oct 2015
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
High conductivity and extended particle contacts are required for rapid charge percolation in flowable electrodes. In this study, carbon spheres (CS) were wrapped by highly conductive reduced graphene oxide sheets (rGO) to address these issues. Various compositions of the conductive, 3D interconnected hybrid materials (rGO@CS) were synthesized by a hydrothermal method. Synergistic effects of both materials were utilized where CS served to minimize the sheet stacking for better flowability of the suspensions, and wrapped rGO sheets enabled higher conductivity for fast charge transport throughout the suspension network. When tested as flowable electrodes, the composition with a 1:2 ratio of GO to CS exhibited the highest capacitance of 200F/g and an improved rate performance. The improved performance is attributed to the fast charge transport in the suspension network due to higher conductivity and enhanced connectivity of the active material particles. Optimized electrodes were also examined in a flow mode which yielded a capacitance of 45F/g.
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Details
- Title
- Graphene-containing flowable electrodes for capacitive energy storage
- Creators
- M Boota - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAK.B Hatzell - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAM Alhabeb - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAE.C Kumbur - Electrochemical Energy Systems Laboratory, Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, PA 19104, USAY Gogotsi - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Carbon (New York), v 92(C), pp 142-149
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000358810400015
- Scopus ID
- 2-s2.0-84937401823
- Other Identifier
- 991014970043104721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary