Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 4, Pages 1034-1038Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201710502
Keywords
2D materials; carbonization; covalent organic frameworks; graphene; supercapacitors
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Funding
- European Union [696656]
- Carl Tryggers Stiftelse
- Romanian Ministry of Research and Innovation
- Executive Agency for Higher Education, Research, Development and Innovation under M-ERA.net [37/2016, ENIAC 04/2014]
- COST Action [CA 15107]
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Hybrid 2D-2D materials composed of perpendicularly oriented covalent organic frameworks (COFs) and graphene were prepared and tested for energy storage applications. Diboronic acid molecules covalently attached to graphene oxide (GO) were used as nucleation sites for directing vertical growth of COF-1 nanosheets (v-COF-GO). The hybrid material has a forest of COF-1 nanosheets with a thickness of 3 to 15 nm in edge-on orientation relative to GO. The reaction performed without molecular pillars resulted in uncontrollable growth of thick COF-1 platelets parallel to the surface of GO. The v-COF-GO was converted into a conductive carbon material preserving the nanostructure of precursor with ultrathin porous carbon nanosheets grafted to graphene in edge-on orientation. It was demonstrated as a high-performance electrode material for supercapacitors. The molecular pillar approach can be used for preparation of many other 2D-2D materials with control of their relative orientation.
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