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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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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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Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy
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The Construction of Binary Phase Electrolyte Interface for Highly Stable Zinc Anodes.

Jiacai Zhu1, Min Yang1, Yang Hu1

  • 1Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, Haihe Laboratory of Sustainable Chemical Transformations, College of Chemistry, Nankai University, Tianjin, 300071, P. R. China.

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Summary

A novel binary phase electrolyte (BPE) using triethyl phosphate (TEP) and water suppresses hydrogen evolution reaction (HER) and dendrite growth in zinc anodes for aqueous zinc-ion batteries.

Keywords:
Zn anodesaqueous batteriesbinary phase electrolytesinterfaces

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Metal zinc is a key anode material for aqueous zinc-ion batteries due to its high capacity, low cost, and safety.
  • However, zinc anodes face challenges like hydrogen evolution reaction (HER), dendrite formation, and by-product generation.

Purpose of the Study:

  • To develop a stable interface for zinc anodes in aqueous zinc-ion batteries.
  • To suppress parasitic reactions and improve the cycling performance of zinc anodes.

Main Methods:

  • A binary phase electrolyte (BPE) interface was created using triethyl phosphate (TEP)-wetted hydrophobic polypropylene (PP) separator on the zinc anode.
  • The BPE interface modifies the Zn2+ solvation structure, reducing water content and suppressing HER.

Main Results:

  • The BPE interface induced a shift from [Zn(H2O)x]2+ to [Zn(TEP)n(H2O)y]2+ solvation structures.
  • Zinc anodes with BPE showed a high Coulombic efficiency of 99.12% and 6000 hours of stable cycling.
  • Zn/AlxV2O5 full cells utilizing the BPE demonstrated enhanced cycling performance.

Conclusions:

  • The TEP/H2O BPE effectively suppresses HER and by-product formation on zinc anodes.
  • This interface engineering strategy significantly improves the electrochemical performance and stability of aqueous zinc anodes.
  • The BPE approach offers a promising pathway for developing high-performance and long-lasting aqueous zinc-ion batteries.