Related Experiment Video
Updated: Jul 29, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
21.7K
A Stabilized Li-Metal Anode with a Ti-Based Metal-Organic Framework Electronic Shield
Wangcong Xu1, Jiaming Cao1, Chu Qi1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
ACS Applied Materials & Interfaces
|October 25, 2023
Summary
Researchers developed a new surface coating for lithium-metal anodes using a metal-organic framework (MOF). This coating effectively prevents lithium dendrite growth, enhancing battery safety and lifespan for commercial applications.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Lithium-metal anodes offer high energy density but suffer from dendrite growth, limiting commercial use.
- Developing a stable solid electrolyte interphase (SEI) is crucial for safe and efficient lithium-metal batteries.
Purpose of the Study:
- To engineer a stable surface layer on lithium metal anodes.
- To inhibit uncontrolled lithium dendrite formation using a scalable method.
Main Methods:
- Functionalizing lithium metal surfaces with a metal-organic framework (MOF), specifically MIL-125(Ti).
- Utilizing in-situ optical microscopy to observe dendrite inhibition.
- Testing MOF-modified lithium anodes in symmetric cells and with sulfur cathodes.
Main Results:
- The MIL-125(Ti) MOF layer effectively suppressed lithium dendrite growth.
- Uniform and dense lithium deposition was achieved due to the MOF's properties.
- MOF-modified anodes showed a 2000-hour lifespan with low overpotential in symmetric cells.
Conclusions:
- Surface engineering with MIL-125(Ti) MOF provides a viable strategy for stabilizing lithium-metal anodes.
- This approach mitigates dendrite issues, paving the way for safer and more durable lithium batteries.
Keywords:
electronic shieldlithium dendriteslithium−sulfur batterymetal−organic frameworksolid electrolyte interphasesurface engineeringMore Related Videos
Related Concept Videos
02:32Bonding in Metals
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
02:37Metallic Solids
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
02:51Metal-Ligand Bonds
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...
01:09Complexation Equilibria: Factors Influencing Stability of Complexes
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
01:24Metal-Semiconductor Junctions
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The semiconductor's...
01:30The Electrical Double Layer
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...