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Updated: Sep 19, 2025
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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Boosting Ultra-Wide Temperature Sodium-Bromine Batteries via Chlorine-Bromine Activation
Wenting Feng1, Jianhang Yang2, Xinru Wei3
1School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao, 266580, P.R. China.
Angewandte Chemie (International Ed. in English)
|June 4, 2025
Summary
This study introduces a novel sodium-bromine-positive (Na-Br(+)) battery that enhances safety and performance. The innovative design enables wide-temperature operation and improved energy storage for sustainable solutions.
Area of Science:
- Electrochemistry
- Materials Science
- Sustainable Energy
Background:
- High-energy-density batteries are crucial for sustainable energy storage.
- Sodium-chlorine batteries offer high energy density but pose safety risks due to gaseous chlorine.
- Sodium-bromine batteries mitigate gas risks but suffer from slow kinetics and volatility.
Purpose of the Study:
- To develop a safer and more practical metal-halogen battery.
- To overcome the limitations of Na-Cl2 and Na-Br2 batteries.
- To create a battery with wide-temperature functionality and improved kinetics.
Main Methods:
- Development of a Na-Br(+) battery utilizing activated Br+ via Cl- anions.
- Pioneering a stabilized redox process through Br-/BrCl2- conversion.
- Investigating heterogeneous halogen activation strategies.
Main Results:
- The Na-Br(+) battery demonstrates low polarization (0.18 V).
- Achieved wide-temperature functionality from -60 °C to 60 °C.
- Exhibited a cycle life exceeding 400 cycles with enhanced reversibility kinetics.
Conclusions:
- The Na-Br(+) battery offers a practical solution for metal-halogen battery safety concerns.
- Heterogeneous halogen activation enhances bromine species kinetics and stability.
- This technology advances the feasibility of high-performance, wide-temperature batteries.
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