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Updated: Nov 29, 2025
09:49
A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
Published on: February 13, 2017
10.8K
A Single-Flow Battery with Multiphase Flow.
Lihi Amit1, Danny Naar1, Robert Gloukhovski1
1Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel.
Chemsuschem
|November 23, 2020
Summary
This study introduces a novel, low-cost zinc-bromine redox flow battery (RFB) using a single flow emulsion. This design eliminates membranes and reduces complexity for efficient renewable energy storage.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Redox flow batteries (RFBs) are crucial for renewable energy storage but face high costs.
- Current RFB designs often require multiple flows, external tanks, and expensive membranes, limiting widespread adoption.
- Developing cost-effective and efficient RFB technologies is essential for grid-scale energy storage.
Purpose of the Study:
- To propose and investigate a novel, inexpensive, membraneless, single-flow zinc-bromine (Zn-Br2) redox flow battery.
- To explore the impact of polybromide-phase volume fraction and bromine concentration on cell performance.
- To demonstrate high efficiency and dendrite-free zinc plating for cost-effective energy storage.
Main Methods:
- Development of a prototype single-flow Zn-Br2 RFB utilizing a multiphase emulsion as the electrolyte.
- Systematic investigation of varying polybromide-phase volume fractions and bromine concentrations.
- Electrochemical characterization including discharge current, plating efficiency, and zinc plating morphology analysis.
Main Results:
- Achieved high discharge currents of up to 270 mA/cm².
- Demonstrated plating efficiencies up to 88%.
- Observed dendrite-free zinc plating at high zinc loadings (up to 250 mAh/cm²).
Conclusions:
- The proposed single-flow, membraneless Zn-Br2 RFB offers a promising pathway towards ultra-low-cost energy storage.
- Multiphase flow and emulsion electrolytes are key to overcoming current RFB limitations.
- Further optimization can unlock significant potential for grid-scale renewable energy integration.
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