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Updated: Jun 6, 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
10.4K
Organic redox flow batteries in non-aqueous electrolyte solutions
Seongmo Ahn1, Ariyeong Yun1, Donghwi Ko1
1Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291, Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. hrbyon@kaist.ac.kr.
Chemical Society Reviews
|November 27, 2024
Summary
Non-aqueous redox flow batteries (NRFBs) utilize organic molecules for higher energy storage. This review explores NRFB advancements, challenges, and potential for sustainable energy solutions.
Area of Science:
- Energy Storage
- Electrochemistry
- Materials Science
Background:
- Growing demand for sustainable energy storage solutions.
- Conventional aqueous vanadium redox flow batteries (RFBs) have limited voltage ranges due to water and vanadium.
- Redox-active organic molecules (ROMs) offer broader liquid media options, including non-aqueous electrolytes.
Purpose of the Study:
- To review recent research progress in non-aqueous electrolyte solution-based organic RFBs (NRFBs).
- To highlight advancements in ROMs, electrolytes, and membranes for NRFBs.
- To identify and address key challenges hindering NRFB technology development.
Main Methods:
- Literature review of recent research on NRFBs.
- Analysis of redox-active organic molecules (ROMs) for non-aqueous electrolytes.
- Examination of electrolytes and membranes used in NRFB systems.
Main Results:
- Non-aqueous electrolytes enable extended voltage ranges (>2 V), facilitating high-energy storage systems.
- NRFBs offer potential for compact installations and unique applications beyond grid-scale storage.
- Identified challenges include narrow cell voltage, insufficient solubility, chemical instability, and ROM crossover.
Conclusions:
- NRFBs represent a promising emerging technology for sustainable energy storage.
- Overcoming current challenges is crucial for the widespread adoption of NRFBs.
- Further research and development are encouraged to explore NRFB potential for global environmental solutions.
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