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Related Concept Videos

Masking and Demasking Agents01:19

Masking and Demasking Agents

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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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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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Related Experiment Video

Updated: Sep 20, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Trace tea polyphenols enabling reversible dendrite-free zinc anode.

Peng Cui1, Jiugang Hu1, Yuqing Luo1

  • 1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.

Journal of Colloid and Interface Science
|June 6, 2022
PubMed
Summary

Trace tea polyphenols (TP) protect zinc anodes in zinc ion batteries (ZIBs) by preventing corrosion and dendrite growth. This additive creates a stable anode/electrolyte interface (AEI), enhancing battery lifespan and performance.

Keywords:
Dendritic inhibitionElectrolyte additiveIn situ X-ray imagingPolyphenolsZinc anode

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Last Updated: Sep 20, 2025

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Zinc ion batteries (ZIBs) face challenges with anode/electrolyte interface (AEI) instability, leading to corrosion and dendrite growth.
  • A stable AEI is crucial for improving the cycle life and safety of ZIBs.

Purpose of the Study:

  • To investigate the use of trace tea polyphenols (TP) as an additive in zinc acetate electrolyte.
  • To enhance the stability of the zinc anode/electrolyte interface (AEI) and improve ZIB performance.

Main Methods:

  • Introduction of trace tea polyphenols (TP) as an additive to zinc acetate electrolyte.
  • In situ synchrotron radiation X-ray imaging to observe zinc deposition.
  • Assembly and testing of Zn-Na3V2(PO4)3 full cells.

Main Results:

  • TP additive promotes uniform zinc deposition and prevents dendrite formation.
  • Stable AEI formation reduces side reactions (hydrogen and oxygen evolution) and increases coulombic efficiency.
  • TP additive (0.028 g L-1) enables 720 h cycling stability and a Zn-Na3V2(PO4)3 full cell with 130 mAh g-1 energy density and 78% capacity retention after 300 cycles.

Conclusions:

  • Trace tea polyphenols are effective in stabilizing the zinc anode/electrolyte interface (AEI) in ZIBs.
  • TP additive engineering offers a promising strategy for developing high-performance and long-lasting aqueous ZIBs.