Journal
ADVANCED MATERIALS
Volume 32, Issue 47, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202002132
Keywords
aqueous redox flow batteries; energy storage; redox active materials; redox reactions
Categories
Funding
- Research Grant Council (RGC) of the Hong Kong Special Administrative Region, China [T23-601/17-R]
- Innovation and Technology Commission of the Hong Kong Special Administrative Region, China [ITS/063/18]
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Redox flow batteries (RFBs) are critical enablers for next-generation grid-scale energy-storage systems, due to their scalability and flexibility in decoupling power and energy. Aqueous RFBs (ARFBs) using nonflammable electrolytes are intrinsically safe. However, their development has been limited by their low energy density and high cost. Developing ARFBs with higher energy density, lower cost, and longer lifespan than the current standard is of significant interest to academic and industrial research communities. Here, a critical review of the latest progress on advanced electrolyte material designs of ARFBs is presented, including a fundamental overview of their physicochemical properties, major challenges, and design strategies. Assessment methodologies and metrics for the evaluation of RFB stability are discussed. Finally, future directions for material design to realize practical applications and achieve the commercialization of ARFB energy-storage systems are highlighted.
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