Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage

Author:

Wrogemann Jens Matthies1ORCID,Lüther Marco Joes1,Bärmann Peer2,Lounasvuori Mailis2,Javed Ali3,Tiemann Michael3,Golnak Ronny2,Xiao Jie2,Petit Tristan2,Placke Tobias1,Winter Martin14

Affiliation:

1. University of Münster MEET Battery Research Center Corrensstraße 46 48149 Münster Germany

2. Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB) Albert-Einstein-Straße 15 12489 Berlin Germany

3. Paderborn University Department of Chemistry Warburger Str. 100 33098 Paderborn Germany

4. Helmholtz Institute Münster IEK-12 Forschungszentrum Jülich GmbH Corrensstraße 46 48149 Münster Germany

Abstract

AbstractFaradaic 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.

Funder

Ministerium für Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen

Publisher

Wiley

Subject

General Chemistry,Catalysis

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