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Related Concept Videos

Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Electrochemical Systems01:24

Electrochemical Systems

Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution, the Zn metal, composed...
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
Standard Electrode Potentials03:02

Standard Electrode Potentials

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...
DC Battery01:21

DC Battery

A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...

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Updated: Jul 9, 2026

Fabrication of VB2/Air Cells for Electrochemical Testing
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Engineering In Situ Loose Selective Interface with Conducting Channels for Practical Ah-Level Aqueous Zinc Metal

Dongdong Wang1,2, Shuo Dou3, Qiongying Huang2

  • 1State Key Laboratory of Utilization of Woody Oil Resource, Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China.

Nano-Micro Letters
|July 8, 2026
PubMed
Summary

Researchers developed a self-repairing porous organic cage interface for aqueous zinc batteries. This loose selective interface (LSI) enables stable, dendrite-free zinc deposition and enhances battery performance and longevity.

Keywords:
Aqueous zinc metal batteriesLoose selective interfaceMolecular engineeringPorous organic cages

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing stable electrode interfaces is crucial for practical aqueous batteries.
  • Porous materials offer potential for conductive and self-repairing interfaces.

Purpose of the Study:

  • To in situ construct a loose selective interface (LSI) using porous organic cages (POCs) for aqueous zinc metal batteries.
  • To investigate the self-assembly mechanism and electrochemical properties of the LSI.

Main Methods:

  • Self-assembly of porous organic cages (POCs) to form a loose selective interface (LSI).
  • Characterization of LSI structure, Zn2+ transport, and interfacial properties.
  • Electrochemical testing of Zn//Zn symmetric cells and Zn//NVO full cells, including Ah-level pouch cells.

Main Results:

  • LSI exhibits a loose porous structure with selective Zn2+-conducting channels and self-repairing capability.
  • High Zn2+ transfer number (0.8), fast desolvation, and homogeneous electric field leading to dendrite-free Zn deposition.
  • Inhibition of water-induced side reactions and enhanced interfacial hydrophobicity.
  • Exceptional cycling stability for Zn//Zn cells (>3200 cycles) and Zn//NVO full cells (>10,000 cycles).
  • Ah-level pouch cells demonstrate high capacity and stability.

Conclusions:

  • The novel LSI methodology provides a stable, highly conductive interface for practical aqueous zinc metal batteries.
  • POC self-assembly offers a promising route for advanced battery interface engineering.