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Formation of Complex Ions03:45

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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...
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Modulating Solvation Shell with Acrylamide Electrolyte Additives for Reversible Zn Anodes.

Hengshuo Liu1, Yongxin Sun2, Yutian Yang1

  • 1School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.

ACS Applied Materials & Interfaces
|August 19, 2024
PubMed
Summary
This summary is machine-generated.

Acrylamide additive stabilizes aqueous zinc-ion batteries by preventing dendrite growth and side reactions. This enhances battery lifespan and performance, advancing energy storage solutions.

Keywords:
additivesaqueous zinc-ion batteriesdendritesside reactionssolvation structure

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Aqueous zinc-ion batteries (ZIBs) are promising due to zinc's high capacity and low cost.
  • Zinc metal anodes suffer from dendrite growth and side reactions with water, limiting battery stability.
  • Developing stable zinc anodes is crucial for practical ZIB applications.

Purpose of the Study:

  • To enhance the stability and performance of zinc metal anodes in ZIBs.
  • To mitigate detrimental side reactions and dendrite formation in aqueous electrolytes.
  • To explore the use of acrylamide as a stabilizing additive for ZIB electrolytes.

Main Methods:

  • Electrolyte modification with acrylamide (AM) additive.
  • Electrochemical performance testing of Zn//Zn symmetric and Zn//VO2 full batteries.
  • Analysis using experimental data and theoretical simulations to understand reaction mechanisms.

Main Results:

  • Acrylamide reconstructs the Zn2+ solvation shell, reducing active water molecules and H2O decomposition.
  • Zn//Zn symmetric batteries demonstrated over 2000 hours of stability at 1 mA cm-2.
  • Zn//VO2 full batteries showed improved cycling performance and high initial discharge capacity.

Conclusions:

  • Acrylamide additive effectively suppresses parasitic reactions and dendrite growth on zinc anodes.
  • Electrolyte optimization via AM incorporation significantly enhances ZIB long-term stability and performance.
  • This strategy provides valuable insights for developing advanced aqueous zinc-ion batteries.