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Related Concept Videos

Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

348
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...
348

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Updated: Jun 13, 2025

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Gradient-Heterogeneous Lithium/Lithium-Magnesium Alloy for a Highly Stable Lithium Metal Anode.

Yi Shuai1,2,3, Yilong Hu2, Lan Geng3

  • 1State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.

ACS Applied Materials & Interfaces
|May 28, 2025
PubMed
Summary

Researchers developed a novel heterogeneous lithium/lithium-magnesium alloy anode with a gradient Mg distribution. This breakthrough enhances lithium metal battery stability and performance, paving the way for advanced energy storage solutions.

Keywords:
Li−Mg alloyMg powdergradient-heterogeneous alloylithium dendriteslithium metal battery

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Lithium metal anodes offer high specific capacity but suffer from reactivity and nonuniform deposition.
  • These challenges hinder the development of stable and efficient lithium metal batteries.

Purpose of the Study:

  • To develop a straightforward and efficient method for fabricating a heterogeneous Li/Li-Mg alloy anode.
  • To investigate the impact of Mg gradient distribution on anode performance.

Main Methods:

  • Fabrication of a gradient-heterogeneous Li/Li-Mg alloy anode.
  • Electrochemical characterization using symmetrical cells.
  • Performance evaluation in a full cell with a SPAN cathode.

Main Results:

  • The gradient-heterogeneous Li/Li-Mg alloy exhibits a higher electrochemical activity surface area than homogeneous alloys.
  • The surface-rich Li alloy prevents passivation, while the interior-rich Mg alloy ensures structural stability.
  • Symmetrical cells achieved stable cycling over 7000 hours.
  • Full cells retained 95% capacity over 500 cycles.

Conclusions:

  • The gradient-heterogeneous Li/Li-Mg alloy anode is a promising strategy for advancing lithium metal batteries.
  • This approach effectively addresses challenges related to lithium metal reactivity and deposition.
  • The developed anode demonstrates excellent electrochemical stability and cycling performance.