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Related Concept Videos

Batteries and Fuel Cells03:12

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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...
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Related Experiment Video

Updated: May 28, 2026

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
09:49

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Published on: February 13, 2017

Self-Assembled Liquid Crystal Interphase Enabling Long-Life All-Iron Redox Flow Batteries.

Zhikun Liu1, Jing Cui1, Han Shi1

  • 1School of Chemical Engineering and Technology, Tianjin University, Tianjin, China.

Angewandte Chemie (International Ed. in English)
|May 26, 2026
PubMed
Summary

A novel liquid crystal interphase created with Brij 56 surfactant significantly enhances aqueous all-iron redox flow batteries (AIRFBs). This interface improves anode stability and uniform iron deposition, boosting battery performance and durability for large-scale energy storage.

Keywords:
interphasesiron anodesliquid crystalsredox flow batteriessurfactants

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Aqueous all-iron redox flow batteries (AIRFBs) offer safe and cost-effective large-scale energy storage.
  • Key limitations include nonuniform iron plating, hydrogen evolution, and anode corrosion, hindering performance and durability.

Purpose of the Study:

  • To enhance the performance and durability of AIRFBs by addressing anode limitations.
  • To introduce a novel interfacial engineering strategy for improved iron deposition and stability.

Main Methods:

  • Incorporation of a non-ionic surfactant, polyethylene glycol cetyl ether (Brij 56), into the AIRFB electrolyte.
  • Formation of a dynamic liquid crystal interphase on the iron anode surface.
  • Electrochemical characterization to evaluate battery performance, efficiency, and cycling stability.

Main Results:

  • The liquid crystal interphase effectively stabilized the anode and inhibited side reactions like hydrogen evolution.
  • Uniform iron deposition was achieved, improving anode reversibility and battery efficiency.
  • High Coulombic efficiency (99.4%) and energy efficiency (74.5%) were maintained over 300 hours at 20 mA cm⁻².
  • The battery demonstrated sustained performance at high current densities (98.2% CE at 60 mA cm⁻²) and high capacity (26 mAh cm⁻²).

Conclusions:

  • Interfacial engineering using a liquid crystal interphase is a promising strategy for advancing AIRFB technology.
  • The Brij 56-modified interface significantly improves the electrochemical performance and long-term stability of iron anodes.
  • This approach holds potential for next-generation large-scale energy storage solutions.