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Poly(benzimidazobenzophenanthroline)-Ladder-Type Two-Dimensional Conjugated Covalent Organic Framework for Fast Proton Storage** |
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| Authors: | Dr Mingchao Wang Dr Gang Wang Dr Chandrasekhar Naisa Dr Yubin Fu Dr Sai Manoj Gali Dr Silvia Paasch Dr Mao Wang Haiko Wittkaemper Dr Christian Papp Prof Eike Brunner Dr Shengqiang Zhou Dr David Beljonne Prof Hans-Peter Steinrück Prof Renhao Dong Prof Xinliang Feng |
| Institution: | 1. Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany;2. Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany
Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany These authors contributed equally to this work.;3. Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany;4. Laboratory for Chemistry of Novel Materials, University of Mons, Place du Parc 20, 7000 Mons, Belgium;5. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany Laboratory of Micro-Nano Optics, College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu, 610101 China;6. Institute of Physical Chemistry II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany;7. Institute of Physical Chemistry II, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany Physical Chemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany;8. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany |
| Abstract: | Electrochemical proton storage plays an essential role in designing next-generation high-rate energy storage devices, e.g., aqueous batteries. Two-dimensional conjugated covalent organic frameworks (2D c-COFs) are promising electrode materials, but their competitive proton and metal-ion insertion mechanisms remain elusive, and proton storage in COFs is rarely explored. Here, we report a perinone-based poly(benzimidazobenzophenanthroline) (BBL)-ladder-type 2D c-COF for fast proton storage in both a mild aqueous Zn-ion electrolyte and strong acid. We unveil that the discharged C?O? groups exhibit largely reduced basicity due to the considerable π-delocalization in perinone, thus affording the 2D c-COF a unique affinity for protons with fast kinetics. As a consequence, the 2D c-COF electrode presents an outstanding rate capability of up to 200 A g?1 (over 2500 C), surpassing the state-of-the-art conjugated polymers, COFs, and metal–organic frameworks. Our work reports the first example of pure proton storage among COFs and highlights the great potential of BBL-ladder-type 2D conjugated polymers in future energy devices. |
| Keywords: | 2D Conjugated COFs Poly(Benzimidazobenzophenanthroline) Proton Storage Strong Acid Zn-Ion Electrolyte |