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Related Concept Videos

Electrodeposition01:08

Electrodeposition

704
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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Related Experiment Video

Updated: Sep 1, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Electrical-Conductive/Insulating Bi-Functional Layers for Stable Zn Metal Anode.

Lang Wang1, Xinyu Wang1, Zhe Wang1

  • 1Department of Materials Science and Engineering, Dalian Maritime University, Dalian, 116026, P. R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 18, 2022
PubMed
Summary

A novel conductive/insulating bi-functional coating layer (CIBL) stabilizes zinc anodes by preventing dendrite growth and side reactions. This strategy significantly enhances coulombic efficiency and cycling stability for zinc-ion batteries.

Keywords:
bi-functionconductive/insulating layernuclear barriershunting effectzinc anode

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Zinc-ion batteries (ZIBs) offer a cost-effective and safe solution for large-scale energy storage.
  • Challenges in ZIBs include zinc anode dendrite growth and side reactions, leading to low coulombic efficiency (CE) and poor cycling stability.
  • Addressing these issues is crucial for realizing the practical application of ZIBs.

Purpose of the Study:

  • To develop a stable zinc metal anode for enhanced ZIB performance.
  • To investigate the efficacy of a conductive/insulating bi-functional coating layer (CIBL) in mitigating anode degradation.
  • To demonstrate the long-term cycling stability and high CE of ZIBs utilizing the CIBL-modified anode.

Main Methods:

  • Fabrication of a CIBL comprising porous silver (Ag) nanowires (NWs) as the conductive layer and polyimide (PI) as the insulating layer.
  • Coating the CIBL onto zinc metal anodes to create CIBL-Zn.
  • Electrochemical testing of CIBL-Zn//CIBL-Zn symmetric cells and CIBL-Zn//V2O5 full cells.

Main Results:

  • The CIBL effectively reduces the nucleation barrier for zinc deposition and confines Zn2+ ions, promoting uniform plating.
  • CIBL-Zn//CIBL-Zn symmetric cells demonstrated stable plating/stripping for over 1300 hours at 1 mA cm-2 with a CE of 99.2% after 1000 cycles.
  • CIBL-Zn//V2O5 full cells exhibited a capacity of 289.2 mAh g-1 at 5 A g-1 after 3000 cycles with no capacity degradation.

Conclusions:

  • The CIBL strategy successfully suppresses dendrite growth and side reactions in zinc anodes.
  • The bi-functional coating significantly improves the coulombic efficiency and cycling stability of zinc metal anodes.
  • The CIBL shows great promise for practical applications in high-performance and long-lasting zinc-ion batteries.