Related Experiment Video
Updated: Oct 15, 2025
09:36
In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
Published on: September 12, 2018
8.9K
Enabling Mg metal anodes rechargeable in conventional electrolytes by fast ionic transport interphase
Ruijing Lv1, Xuze Guan1, Jiahua Zhang1
1Key Laboratory for Green Chemical Technology of Ministry of Education, State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
National Science Review
|October 25, 2021
Summary
Researchers developed a Sn-based artificial layer for magnesium anodes, enhancing rechargeable battery performance. This modification enables stable plating/stripping over 4000 cycles, overcoming passivation issues in conventional electrolytes.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Rechargeable magnesium batteries are promising due to high volumetric capacity and dendrite-free Mg anodes.
- Mg anodes face challenges with surface passivation films in conventional electrolytes, causing irreversible plating/stripping.
- Developing stable Mg anodes is crucial for advancing next-generation energy storage.
Purpose of the Study:
- To create a modified Mg metal anode with a Sn-based artificial layer.
- To improve the plating/stripping behavior and ion conductivity of Mg anodes.
- To enable stable cycling of Mg anodes in conventional electrolytes.
Main Methods:
- A facile and safe method involving ion-exchange and alloying reactions was employed.
- A Sn-based artificial coating layer was applied to the Mg metal anode.
- Electrochemical performance was evaluated using Mg symmetric cells in Mg(TFSI)2/DME electrolyte.
Main Results:
- The Sn-based artificial layer, comprising Mg2Sn alloy composites and MgCl2/SnCl2, facilitates fast ion transport.
- Improved ion conductivity and decreased overpotential were observed in the solid electrolyte interfaces.
- The coated Mg anodes demonstrated stable plating/stripping for over 4000 cycles at 6 mA cm-2.
Conclusions:
- The Sn-based artificial layer effectively prevents Mg anode passivation in conventional electrolytes.
- The modified Mg anode exhibits enhanced ion diffusion kinetics and long-term cycling stability.
- This approach offers a viable strategy for developing high-performance rechargeable magnesium batteries.
Related Concept Videos
00:56Extraction: Advanced Methods
572
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...
572
01:17Ion Exchange
717
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
717
03:45Formation of Complex Ions
24.4K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
24.4K
01:08Electrodeposition
782
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
782
02:51Metal-Ligand Bonds
22.2K
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...
22.2K
01:15Potentiometry: Membrane Electrodes
882
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
882