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Related Concept Videos

Electrodeposition01:08

Electrodeposition

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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.
Electrodeposition can...
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Standard Electrode Potentials03:02

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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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Formation of Complex Ions03:45

Formation of Complex Ions

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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 are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
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Extraction: Advanced Methods00:56

Extraction: Advanced Methods

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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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Ion Exchange

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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...
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Updated: Jun 4, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
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A Stable Solid-Electrolyte Interphase Constructed by a Nucleophilic Molecule Additive for the Zn Anode with High

Linyu Xiao1, Jifei Sun2, Mingming Wang2

  • 1College of Chemistry, Chemical Engineering and Materials Science, Jiangsu Key Laboratory of Advanced Functional Polymer Materials, Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou 215123, China.

ACS Applied Materials & Interfaces
|January 4, 2025
PubMed
Summary

Methoxy ethylamine (MOEA) additive improves aqueous Zn-ion batteries by creating a stable solid-electrolyte interphase (SEI). This suppresses side reactions, enhancing zinc utilization and battery durability.

Keywords:
Helmholtz planeZn-ion batterieshigh utilization rationucleophilic moleculessolid-electrolyte interphase

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • The solid-electrolyte interphase (SEI) is critical for aqueous Zn-ion battery (AZIB) stability and reversibility.
  • Nonuniform SEI layers, caused by parasitic reactions like hydrogen evolution (HER), limit zinc utilization ratios (ZURs).

Purpose of the Study:

  • To develop a strategy for constructing a stable SEI layer in AZIBs.
  • To enhance the performance and durability of AZIBs by suppressing parasitic reactions.

Main Methods:

  • Utilized methoxy ethylamine (MOEA) as a nucleophilic additive in the electrolyte.
  • Investigated MOEA's adsorption on the Zn anode's Helmholtz plane (HP) to exclude water.
  • Evaluated SEI layer formation and electrochemical performance in Zn||Cu asymmetric and Zn||Zn symmetric cells.

Main Results:

  • MOEA successfully modified the HP, suppressing side reactions and forming a smooth SEI layer.
  • Achieved high ZURs and areal capacities, with a Zn||Cu cell reaching 4 Ah cm-2 at 10 mA cm-2 (99.8% CE).
  • Zn||Zn symmetric cells demonstrated 80% ZUR at 20 mAh cm-2 for 130 h, improving full cell performance.

Conclusions:

  • Nucleophilic electrolyte additives like MOEA are effective in optimizing the SEI layer for AZIBs.
  • This strategy significantly enhances zinc anode reversibility and overall battery durability.
  • Opens a viable pathway for developing high-performance, long-lasting aqueous Zn batteries.