Recent advances in molecular engineering of redox active organic molecules for nonaqueous flow batteries
Abstract:
Cost-effective electrochemical energy storage will play a critical role as society transitions to a sustainable energy economy. Nonaqueous flow batteries employing redox active organic molecules are an emerging energy storage concept. A key advantage of this device over the more established aqueous flow battery is the promise for higher cell potentials (>3 V), enabled by the larger electrochemical stability windows of nonaqueous electrolytes. Additionally, nonaqueous flow batteries could leverage new redox couples that are incompatible with aqueous electrolytes due to low solubility, chemical reactivity, and redox potentials outside of the aqueous stability window. Taking advantage of these characteristics may lead to higher energy densities, smaller system footprints, and lower costs. This mini review summarizes recent developments in all-organic nonaqueous chemistries with a focus on tailoring organic molecules for improved physical and electrochemical properties. Key opportunities and challenges in the science and engineering of these devices are presented with a goal of meeting stringent grid cost targets.read more
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Journal ArticleDOI
Opportunities and Challenges for Organic Electrodes in Electrochemical Energy Storage.
TL;DR: This review provides a comprehensive overview of all reported cell configurations that involve electroactive organic compounds working either in the solid state or in solution for aqueous or nonaqueous electrolytes and highlights the most promising systems based on such various chemistries.
Journal ArticleDOI
Molecular engineering of organic electroactive materials for redox flow batteries
TL;DR: This review presents a systematic molecular engineering scheme for designing organic and organometallic redox species in terms of solubility, redox potential, and molecular size and introduces recent advances covering the reaction mechanisms, specific functionalization methods, and electrochemical performances ofredox species classified by their molecular structures.
Journal ArticleDOI
Recent developments in organic redox flow batteries: A critical review
Puiki Leung,Akeel A. Shah,Laura Sanz,Cristina Flox,Joan Ramon Morante,Joan Ramon Morante,Qian Xu,Mohd Rusllim Mohamed,C. Ponce de León,Frank C. Walsh +9 more
TL;DR: In this paper, the authors summarized the fundamental developments and characterization of organic redox flow batteries from both the chemistry and materials perspectives and discussed the latest advances, future challenges and opportunities for further development.
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Rechargeable redox flow batteries: flow fields, stacks and design considerations
Xinyou Ke,Joseph M. Prahl,J. Iwan D. Alexander,Jesse S. Wainright,Thomas A. Zawodzinski,Thomas A. Zawodzinski,Robert F. Savinell +6 more
TL;DR: This review focuses on the less-discussed practical aspects of devices, such as flow fields, stack and design considerations for developing high performance large-scale flow batteries.
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A Long Cycle Life, Self‐Healing Zinc–Iodine Flow Battery with High Power Density
TL;DR: A zinc-iodine flow battery with long cycle life, high energy, high power density, and self-healing behavior is prepared and it is believed this ZIFB can lead the way to development of new-generation, high-performance flow batteries.
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