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Overcoming Diffusion Limitation of Faradaic Processes: Property-Performance Relationships of 2D Conductive Metal-Organic Framework Cu3(HHTP)2 for Reversible Lithium-Ion Storage |
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| Authors: | Jens Matthies Wrogemann Marco Joes Lüther Dr Peer Bärmann Dr Mailis Lounasvuori Dr Ali Javed Prof Michael Tiemann Dr Ronny Golnak Dr Jie Xiao Dr Tristan Petit Dr Tobias Placke Prof Martin Winter |
| Institution: | 1. University of Münster, MEET Battery Research Center, Corrensstraße 46, 48149 Münster, Germany;2. University of Münster, MEET Battery Research Center, Corrensstraße 46, 48149 Münster, Germany
These authors contributed equally to this work. Contribution: Conceptualization (equal), Formal analysis (equal), Investigation (equal), Writing - original draft (equal);3. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Albert-Einstein-Straße 15, 12489 Berlin, Germany Contribution: Formal analysis (supporting), Investigation (supporting), Writing - original draft (supporting);4. Paderborn University, Department of Chemistry, Warburger Str. 100, 33098 Paderborn, Germany Contribution: Formal analysis (supporting), Investigation (supporting);5. Paderborn University, Department of Chemistry, Warburger Str. 100, 33098 Paderborn, Germany Contribution: Supervision (supporting), Writing - review & editing (supporting);6. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Albert-Einstein-Straße 15, 12489 Berlin, Germany Contribution: Formal analysis (supporting), Investigation (supporting);7. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Albert-Einstein-Straße 15, 12489 Berlin, Germany Contribution: Funding acquisition (supporting), Supervision (supporting), Writing - review & editing (supporting);8. University of Münster, MEET Battery Research Center, Corrensstraße 46, 48149 Münster, Germany Helmholtz Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany Contribution: Funding acquisition (lead), Supervision (equal), Writing - review & editing (supporting) |
| Abstract: | Faradaic reactions including charge transfer are often accompanied with diffusion limitation inside the bulk. Conductive two-dimensional frameworks (2D MOFs) with a fast ion transport can combine both—charge transfer and fast diffusion inside their porous structure. To study remaining diffusion limitations caused by particle morphology, different synthesis routes of Cu-2,3,6,7,10,11-hexahydroxytriphenylene (Cu3(HHTP)2), a copper-based 2D MOF, are used to obtain flake- and rod-like MOF particles. Both morphologies are systematically characterized and evaluated for redox-active Li+ ion storage. The redox mechanism is investigated by means of X-ray absorption spectroscopy, FTIR spectroscopy and in situ XRD. Both types are compared regarding kinetic properties for Li+ ion storage via cyclic voltammetry and impedance spectroscopy. A significant influence of particle morphology for 2D MOFs on kinetic aspects of electrochemical Li+ ion storage can be observed. This study opens the path for optimization of redox active porous structures to overcome diffusion limitations of Faradaic processes. |
| Keywords: | Batteries Energy Conversion Lithium-Ion Storage Metal-Organic Frameworks Particle Design |