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

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 limi...

Full description

Saved in:
Bibliographic Details
Published in:Angewandte Chemie International Edition 2023-06, Vol.62 (26), p.e202303111-n/a
Main Authors: Wrogemann, Jens Matthies, Lüther, Marco Joes, Bärmann, Peer, Lounasvuori, Mailis, Javed, Ali, Tiemann, Michael, Golnak, Ronny, Xiao, Jie, Petit, Tristan, Placke, Tobias, Winter, Martin
Format: Article
Language:English
Subjects:
Absorption spectroscopy
Batteries
Charge transfer
Copper
Diffusion
Diffusion rate
Electrochemistry
Energy Conversion
Ion storage
Ion transport
Lithium
Lithium ions
Lithium-Ion Storage
Metal-Organic Frameworks
Morphology
Optimization
Particle Design
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. A two‐dimensional MOF, (Cu3(HHTP)2), is synthesized with two different morphologies. Flake‐ and rod‐like shaped particles were evaluated to investigate the impact of the particle morphology of MOFs on electrochemical Li+ ion storage. By optimization of the particle morphology, diffusion limitation of the Faradaic process can be strongly reduced.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202303111