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Related Experiment Video

Updated: Jan 23, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

A Single-Phase Mixed Ion-Electron Conducting Metal-Organic Framework.

Petru Apostol¹, Xiaodong Lin¹, Simon M-M Dubois¹

¹Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Louvain-la-Neuve B-1348, Belgium.

Journal of the American Chemical Society

|January 22, 2026

Summary

Researchers developed a new cation-rich strategy for mixed ionic-electronic conductors using a 2D metal-organic framework. This breakthrough enables efficient solid-state lithium-ion batteries with enhanced performance.

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Mixed ionic-electronic conductors (MIECs) are crucial for electrochemical devices, enabling simultaneous charge and mass transport.
Structurally defined single-phase MIECs are rare, with most systems relying on physical mixtures of components.

Purpose of the Study:

To introduce a cation-rich design strategy for creating solid-state mixed ionic-electronic conductors.
To engineer tunable transport properties in a two-dimensional copper-catecholate metal-organic framework (MOF).

Main Methods:

A cation-rich design strategy was employed using a 2D copper-catecholate MOF, Cu 3 (HOTAT) 2 .
Controlled fractional reduction of the MOF generated a series of Li x Cu 3 (HOTAT) 2 phases with varying Li content.
Electronic-structure calculations were used to analyze transport properties.

Main Results:

The Li-rich phase, Li 7.50 Cu 3 (HOTAT) 2 , demonstrated intrinsic mixed conduction at room temperature.
Achieved electronic conductivity of 2.8 × 10 -3 S cm -1 and Li + conductivity of 1.1 × 10 -3 S cm -1 .
As a cathode in all-solid-state Li batteries, it delivered 100 mAh g -1 over 100 cycles with high Coulombic efficiency.

Conclusions:

Cation-rich reduction of redox-active 2D MOFs is an effective method for engineering solid-state mixed ionic-electronic conductors.
This approach opens new avenues for developing dual-conducting porous materials for advanced electrochemical technologies.
The developed material shows promise for high-performance, stable solid-state lithium-ion batteries.