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A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery
Published on: February 13, 2017
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A Hydrogen-Bromate Flow Battery as a Rechargeable Chemical Power Source.
Natalia V Kartashova1,2, Dmitry V Konev3,4, Pavel A Loktionov2,3
1Faculty of Fundamental Physical and Chemical Engineering, Lomonosov Moscow State University, 119991 Moscow, Russia.
Membranes
|December 23, 2022
Summary
This study demonstrates the rechargeable capability of the hydrogen-bromate flow battery. The device successfully cycles between charge and discharge, enabling its use as a reusable power source.
Area of Science:
- Electrochemistry
- Energy Storage Systems
- Renewable Energy Technologies
Background:
- Hydrogen-bromate flow batteries are promising for hybrid power sources.
- Previous research focused on the discharge reaction (BrO3- reduction to Br-).
- Rechargeability in acidic conditions using the same cell was unproven.
Purpose of the Study:
- To investigate the rechargeable potential of the hydrogen-bromate flow battery.
- To demonstrate cyclic charge and discharge operations within a single cell.
- To evaluate key performance metrics during cyclic operation.
Main Methods:
- Utilized a membrane-electrode assembly (MEA) with specific components (H2 anode, Pt-C/GP-IEM cathode).
- Operated the flow battery in an alternating galvanostatic mode at 75 mA/cm2.
- Measured coulombic, voltaic, and energy efficiencies, and catholyte absorption spectra.
Main Results:
- Successfully demonstrated cyclic charge and discharge of the hydrogen-bromate flow battery.
- Confirmed electrooxidation of bromide (Br-) to bromate (BrO3-) in acidic conditions within the cell.
- Quantified efficiencies and analyzed catholyte composition during operation.
Conclusions:
- The hydrogen-bromate flow battery can function as a rechargeable power source.
- The established MEA and acidic conditions support reversible electrochemical reactions.
- This finding expands the potential applications of hydrogen-bromate flow batteries.
Keywords:
bromate anions reductionbromide anions oxidationcrossoverflow batteryfuel cellredox mediator cycleMore Related Videos
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