Trust is good, control is better: a review on monitoring and characterization techniques for flow battery electrolytes
Flow batteries (FBs) currently are one of the most promising large-scale energy storage technologies for energy grids with a large share of renewable electricity generation. Among the main technological challenges for the economic operation of a large-scale battery technology is its calendar lifetim...
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| Published in | Materials horizons Vol. 8; no. 7; pp. 1866 - 1925 |
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| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Cambridge
Royal Society of Chemistry
01.07.2021
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| Subjects | |
| Online Access | Get full text |
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| Summary: | Flow batteries (FBs) currently are one of the most promising large-scale energy storage technologies for energy grids with a large share of renewable electricity generation. Among the main technological challenges for the economic operation of a large-scale battery technology is its calendar lifetime, which ideally has to cover a few decades without significant loss of performance. This requirement can only be met if the key parameters representing the performance losses of the system are continuously monitored and optimized during the operation. Nearly all performance parameters of a FB are related to the two electrolytes as the electrochemical storage media and we therefore focus on them in this review. We first survey the literature on the available characterization methods for the key FB electrolyte parameters. Based on these, we comprehensively review the currently available approaches for assessing the most important electrolyte state variables: the state-of-charge (SOC) and the state-of-health (SOH). We furthermore discuss how monitoring and operation strategies are commonly implemented as online tools to optimize the electrolyte performance and recover lost battery capacity as well as how their automation is realized
via
battery management systems (BMSs). Our key findings on the current state of this research field are finally highlighted and the potential for further progress is identified.
This review article summarizes the state-of-the-art techniques for the characterization and monitoring of flow battery electrolytes highlighting in particular the importance of the electrolyte state-of-charge and state-of-health assessment. |
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| Bibliography: | Ulrich S. Schubert performed his PhD studies at the Universities of Bayreuth and South Florida. After a postdoctoral training at the University of Strasbourg with Prof. Lehn (Nobel Prize 1987), he moved to the TU Munich and obtained his Habilitation in 1999. In 1999-2000 he was Professor at the University of Munich, and during 2000-2007 Full-Professor at the TU Eindhoven. Since 2007, he is a Full-Professor at the Friedrich Schiller University Jena, Germany. He is founding director of the Center for Energy and Environmental Chemistry Jena (CEEC Jena) and coordinator of the DFG priority program "Polymer-based Batteries" (SPP 2248) and the EU ITN "POLYSTORAGE" (GA 860403). Martin D. Hager completed his PhD in 2007 at the Friedrich Schiller University Jena. After postdoctoral research at the TU Eindhoven, in 2008 he became a group leader in the group of Prof. Dr Ulrich S. Schubert at the FSU Jena. His research interests include reversible polymer systems for self-healing applications, conjugated polymers for solar cells, as well as redox-active polymers for batteries (from small printable devices to large redox-flow-batteries). Ivan A. Volodin studied chemical engineering at the Mendeleev University of Chemical Technology, Russia. He obtained his Master diploma in materials science at the Skolkovo University of Science and Technology, Russia. In 2019 he joined the group of Prof. Dr Ulrich S. Schubert as a PhD student, where he develops new characterization techniques and organic electrolytes for redox flow batteries. Oliver Nolte studied Chemistry at the Friedrich Schiller University Jena, Germany where he obtained his Master's degree in the field of polymer chemistry. In 2017, he joined the group of Prof. Dr Ulrich S. Schubert as a PhD student, where he currently develops organic electrolytes for redox flow batteries and focuses on characterization tools for them. Christian Stolze studied physics at the Friedrich Schiller University Jena, Germany. He completed his PhD in the group of Prof. Dr Ulrich S. Schubert in 2020, where he specialized in the characterization and optimization of organic radical batteries and flow batteries. His current research interests are focused on the development of state-of-charge and state-of-health measurement techniques for flow battery electrolytes as well as the investigation of electrochemical approaches for increasing the energy density of flow batteries. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 2051-6347 2051-6355 |
| DOI: | 10.1039/d0mh01632b |