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Related Concept Videos

Standard Electrode Potentials03:02

Standard Electrode Potentials

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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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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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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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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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Synthesis and Performance Evaluations of ZnCoS/ZnCdS with Twin Crystal Structure for Multifunctional Redox Photocatalysis in Energy Applications
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Hybrid Coating with High Zn2+ Selectivity Achieves Stable Zinc Anodes.

Shunshun Jia1, Haifeng Bian1, Qing Zhou1

  • 1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, PR China.

Nano Letters
|October 17, 2025
PubMed
Summary

A new hybrid coating (CZ) using nano-zinc stannate (ZTO) and cellulose acetate (CA) stabilizes zinc anodes. This advanced coating improves ion flow and deposition, extending battery life significantly.

Keywords:
aqueous zinc-ion batteriesdendrite growthprotective coatingside reactions

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Zinc anodes are crucial for rechargeable batteries but suffer from dendrite formation and low Coulombic efficiency.
  • Developing protective coatings is essential to enhance the stability and performance of zinc anodes.

Purpose of the Study:

  • To design and synthesize a novel nano-zinc stannate (ZTO)/cellulose acetate (CA) hybrid coating (CZ) for zinc anodes.
  • To investigate the protective mechanisms of the CZ coating on zinc anode behavior using DFT calculations and experimental validation.

Main Methods:

  • Density Functional Theory (DFT) guided synthesis of the ZTO/CA hybrid coating.
  • Characterization of the coating's structure, composition, and electrochemical properties.
  • Electrochemical testing of CZ-coated zinc anodes in symmetric cells and full cells with NH4V4O10 cathodes.

Main Results:

  • DFT calculations predicted ZTO's Zn2+ selectivity and low migration barriers, confirming its suitability for ion-sieving and acceleration effects.
  • The CZ coating demonstrated excellent film-forming ability and high zinc affinity, suppressing side reactions and promoting uniform Zn2+ deposition.
  • CZ-Zn anodes achieved stable cycling for 3000 hours at 5 mA cm-2, significantly outperforming bare zinc anodes.
  • Full cells utilizing CZ-Zn anodes exhibited enhanced cyclability and improved rate performance.

Conclusions:

  • The multifunctional CZ hybrid coating effectively protects zinc anodes by regulating ion flux and deposition.
  • This work presents a universal and promising strategy for developing stable and high-performance zinc anodes for energy storage applications.