Related Experiment Video
Updated: Sep 28, 2025
08:12
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
16.2K
Ethylene oxide functionalization enhances the ionic conductivity of a MOF
Sorout Shalini1, Adam J Matzger1,2
1Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, MI 48109, USA. matzger@umich.edu.
Chemical Communications (Cambridge, England)
|April 1, 2022
Summary
Two novel zirconium-based metal-organic frameworks (MOFs) functionalized with ethylene oxide (EO) chains demonstrate promising solvent-free ionic conductivity for lithium-ion battery applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Metal-organic frameworks (MOFs) are crystalline porous materials with tunable structures.
- Ethylene oxide (EO) functionalization can introduce specific chemical properties into MOFs.
- Ionic conductivity in solid-state electrolytes is crucial for advanced battery technologies.
Purpose of the Study:
- To synthesize and characterize novel MOFs with varying degrees of ethylene oxide functionalization.
- To investigate the potential of these functionalized MOFs as solid-state electrolytes for lithium-ion batteries.
- To correlate the EO content with ionic conductivity properties.
Main Methods:
- Synthesis of zirconium-based MOF UiO-68 with controlled ethylene oxide (EO) functionalization.
- Loading of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) into the MOF pores.
- Measurement of ionic conductivity at elevated temperatures (90 °C).
Main Results:
- Two novel MOFs, UiO-68-EO and UiO-68-2EO, were successfully synthesized.
- Both MOFs exhibited solvent-free ionic conductivity upon LiTFSI loading.
- UiO-68-2EO/LiTFSI showed significantly higher ionic conductivity (3.9 × 10-4 S cm-1) compared to UiO-68-EO/LiTFSI (3.8 × 10-7 S cm-1) at 90 °C.
- The presence of EO chains facilitated lithium ion migration.
Conclusions:
- Ethylene oxide functionalization in UiO-68 MOFs enhances their capability as solid-state electrolytes.
- The degree of EO functionalization directly impacts lithium ion conductivity.
- These novel MOFs show potential for developing safer and more efficient lithium-ion batteries.
More Related Videos
Related Concept Videos
02:51Metal-Ligand Bonds
21.6K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
21.6K
01:23Properties of Organometallic Compounds
1.2K
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
1.2K
01:19Complexation Equilibria: The Chelate Effect
705
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
705
00:56Extraction: Advanced Methods
564
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
564
02:58Crystal Field Theory - Octahedral Complexes
28.1K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
28.1K