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Updated: Aug 7, 2025
06:44
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
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Solid Interhalogen Compounds with Effective Br0 Fixing for Stable High-energy Zinc Batteries
Shengmei Chen1, Yiran Ying2, Shengnan Wang1
1Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 999077, P. R. China.
Angewandte Chemie (International Ed. in English)
|March 7, 2023
Summary
A novel solid interhalogen compound, iodine monobromide (IBr), acts as an active cathode material in zinc batteries. This approach effectively suppresses the shuttle effect, enhancing energy density and Coulombic efficiency for advanced energy storage.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Bromine-based batteries face challenges with soluble bromine species (Br2/Br3-) causing shuttle effects, self-discharge, and low Coulombic efficiency.
- Conventional quaternary ammonium salts used to immobilize bromine species add mass and volume without contributing to capacity.
Purpose of the Study:
- To develop a novel cathode material for high-energy electrochemical energy storage.
- To address the shuttle effect and improve Coulombic efficiency in bromine-based batteries.
- To explore the potential of solid interhalogen compounds in battery applications.
Main Methods:
- Investigated iodine monobromide (IBr) as an all-active solid interhalogen cathode material.
- Fabricated and tested Zn||IBr batteries.
- Analyzed battery performance, including energy density and Coulombic efficiency, comparing it with existing cathode materials.
Main Results:
- The Zn||IBr battery achieved a high energy density of 385.8 Wh kg-1.
- The solid IBr cathode effectively fixed bromine species, eliminating the shuttle effect during charging and discharging.
- Performance surpassed that of iodine (I2), methyl ethyl morpholinium bromide (MEMBr3), and tetrapropylammonium bromide (TPABr3) cathodes.
Conclusions:
- Solid interhalogen compounds offer a promising avenue for developing high-energy electrochemical energy storage devices.
- Iodine monobromide (IBr) presents a viable alternative cathode material, overcoming key limitations of traditional bromine-based systems.
- This research opens new possibilities for active solid interhalogen chemistry in advanced battery technologies.
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