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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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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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EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
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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...
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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.
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Trehalose in Trace Quantities as a Multifunctional Electrolyte Additive for Highly Reversible Zinc Metal Anodes.

Xiao Huang1, Taisong Pan1,2, Jian Shao3

  • 1School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, P.R. China.

ACS Applied Materials & Interfaces
|January 16, 2024
PubMed
Summary

Adding trehalose to aqueous zinc-ion batteries (AZIBs) significantly improves zinc metal anode performance. This electrolyte additive enhances stability and reversibility, paving the way for commercial AZIB applications.

Keywords:
electrolytes regulationhydrogen bondssolvation structuretrehalose additivezinc metal anodes

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Aqueous zinc-ion batteries (AZIBs) are promising for energy storage but limited by zinc metal anode instability.
  • Poor Zn anode performance hinders the commercial viability of AZIB technology.

Purpose of the Study:

  • To enhance the stability and reversibility of zinc metal anodes in AZIBs.
  • To investigate the effect of a novel trehalose additive on Zn anode performance.

Main Methods:

  • Introduction of a trace amount of trehalose as a multifunctional additive in the electrolyte.
  • Electrochemical testing of Zn//Zn symmetric cells and pouch cells (Zn//NH4V4O10, Zn//MnO2).
  • Analysis of Zn-electrolyte interface and solvation structure.

Main Results:

  • Trehalose additive demonstrated strong Zn2+ ion affinity, disrupting water hydrogen bonds and regulating solvation.
  • Achieved remarkable Coulombic efficiency (99.80%) and cycle stability (>4500 h at 1 mA cm-2).
  • Maintained cumulative capacity of 2500 mA h cm-2 at 10 mA cm-2 and excellent low-temperature performance (>400 h at -10 °C).

Conclusions:

  • Trehalose additive effectively stabilizes Zn metal anodes in AZIBs.
  • This strategy offers a pathway for developing high-performance and durable AZIBs.
  • The findings support trehalose as a key component for advanced zinc anode electrolytes.