Design of Hierarchically Porous Carbons with Interlinked Hydrophilic and Hydrophobic Surface and Their Capacitive Behavior
Hao GP, Zhang Q, Sin M, Hippauf F, Borchardt L, Brunner E, Kaskel S (2016)
Publication Type: Journal article
Publication year: 2016
Journal
Book Volume: 28
Pages Range: 8715-8725
Journal Issue: 23
DOI: 10.1021/acs.chemmater.6b03964
Abstract
In this contribution, we report a general surface engineering strategy to transform nonpolar nanocarbons (e.g., carbon nanotube and graphene) into amphiphilic nanocarbons with unique ultrahydrophilic@ultrahydrophobic surface configuration and hierarchical structure by grafting a thin layer of metal-organic frameworks followed by pyrolysis and leaching. The outer ultrahydrophilic carbon layer features rich surface heterogeneity (B-/N-doping both up to ca. 10 at. %) and high density of microporosity, while the inner nonpolar CNT or graphene provides a high electronic conductivity. The unique bipolar surface and high heterogeneity as well as highly accessible hierarchical structures render this family of nanocarbons capable of a high surface efficiency under both aqueous and organic conditions, as it is reflected in the behavior of the electrodes for supercapacitors by comparing a wide range of highly porous nonpolar carbons. The bipolar hierarchical carbons' efficiency in terms of areal capacitance and energy density are 3-6 times and 2-3 times higher than that of typical benchmark materials (e.g., commercially popular YP-50F carbons, CNT, and graphene etc.). More importantly, the study of this series of model carbon materials may help researchers to understand in-depth how carbon surface chemistry with a high density of doping sites influences the wetting, transport, and electrosorption behavior of charged ions in aqueous and organic conditions.
Involved external institutions
Germany (DE)
China (CN)How to cite
APA:
Hao, G.-P., Zhang, Q., Sin, M., Hippauf, F., Borchardt, L., Brunner, E., & Kaskel, S. (2016). Design of Hierarchically Porous Carbons with Interlinked Hydrophilic and Hydrophobic Surface and Their Capacitive Behavior. Chemistry of Materials, 28(23), 8715-8725. https://doi.org/10.1021/acs.chemmater.6b03964
MLA:
Hao, Guang-Ping, et al. "Design of Hierarchically Porous Carbons with Interlinked Hydrophilic and Hydrophobic Surface and Their Capacitive Behavior." Chemistry of Materials 28.23 (2016): 8715-8725.
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